Datasheet Linear Technology LT1121 — Ficha de datos

Fabricante	Linear Technology
Serie	LT1121

Reguladores de baja potencia de micropoder con apagado

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PDF, 275 Kb, Idioma: en, Archivo subido: sept 2, 2017, Páginas: 16
Micropower Low Dropout Regulators with Shutdown

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Precios

Embalaje

	LT1121ACS8#PBF	LT1121ACS8#TRPBF	LT1121ACS8-3.3#PBF	LT1121ACS8-3.3#TRPBF	LT1121ACS8-5#PBF	LT1121ACS8-5#TRPBF	LT1121AHVCS8#PBF	LT1121AHVCS8#TRPBF	LT1121AHVIS8#PBF	LT1121AHVIS8#TRPBF	LT1121AIS8#PBF	LT1121AIS8#TRPBF	LT1121AIS8-3.3#PBF	LT1121AIS8-3.3#TRPBF	LT1121AIS8-5#PBF	LT1121AIS8-5#TRPBF	LT1121CN8#PBF	LT1121CN8-3.3#PBF	LT1121CN8-5#PBF	LT1121CS8#PBF	LT1121CS8#TRPBF	LT1121CS8-3.3#PBF	LT1121CS8-3.3#TRPBF	LT1121CS8-5#PBF	LT1121CS8-5#TRPBF	LT1121CST-3.3#PBF	LT1121CST-3.3#TRPBF	LT1121CST-5#PBF	LT1121CST-5#TRPBF	LT1121CZ-3.3#PBF	LT1121CZ-3.3#TRPBF	LT1121CZ-5#PBF	LT1121CZ-5#TRPBF	LT1121HVCS8#PBF	LT1121HVCS8#TRPBF	LT1121HVIS8#PBF	LT1121HVIS8#TRPBF	LT1121IN8#PBF	LT1121IN8-3.3#PBF	LT1121IN8-5#PBF	LT1121IS8#PBF	LT1121IS8#TRPBF	LT1121IS8-3.3#PBF	LT1121IS8-3.3#TRPBF	LT1121IS8-5#PBF	LT1121IS8-5#TRPBF	LT1121IST-3.3#PBF	LT1121IST-3.3#TRPBF	LT1121IST-5#PBF	LT1121IST-5#TRPBF	LT1121IZ-3.3#PBF	LT1121IZ-3.3#TRPBF	LT1121IZ-5#PBF	LT1121IZ-5#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50	51	52	53	54
Package	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	N-8 Dibujo del esquema del paquete	N-8 Dibujo del esquema del paquete	N-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SOT-223 Dibujo del esquema del paquete	SOT-223 Dibujo del esquema del paquete	SOT-223 Dibujo del esquema del paquete	SOT-223 Dibujo del esquema del paquete	TO-92 Dibujo del esquema del paquete	TO-92 Dibujo del esquema del paquete	TO-92 Dibujo del esquema del paquete	TO-92 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	N-8 Dibujo del esquema del paquete	N-8 Dibujo del esquema del paquete	N-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SO-8 Dibujo del esquema del paquete	SOT-223 Dibujo del esquema del paquete	SOT-223 Dibujo del esquema del paquete	SOT-223 Dibujo del esquema del paquete	SOT-223 Dibujo del esquema del paquete	TO-92 Dibujo del esquema del paquete	TO-92 Dibujo del esquema del paquete	TO-92 Dibujo del esquema del paquete	TO-92 Dibujo del esquema del paquete
Package Code	S8	S8	S8	S8	S8	S8	S8	S8	S8	S8	S8	S8	S8	S8	S8	S8	N	N	N	S8	S8	S8	S8	S8	S8	ST	ST	ST	ST	Z	Z	Z	Z	S8	S8	S8	S8	N	N	N	S8	S8	S8	S8	S8	S8	ST	ST	ST	ST	Z	Z	Z	Z
Package Index	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1510 (N8)	05-08-1510 (N8)	05-08-1510 (N8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1630	05-08-1630	05-08-1630	05-08-1630	05-08-1410	05-08-1410	05-08-1410	05-08-1410	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1510 (N8)	05-08-1510 (N8)	05-08-1510 (N8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1630	05-08-1630	05-08-1630	05-08-1630	05-08-1410	05-08-1410	05-08-1410	05-08-1410
Pin Count	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	3	3	3	3	3	3	3	3	8	8	8	8	8	8	8	8	8	8	8	8	8	3	3	3	3	3	3	3	3

Paramétricos

Parameters / Models	LT1121ACS8#PBF	LT1121ACS8#TRPBF	LT1121ACS8-3.3#PBF	LT1121ACS8-3.3#TRPBF	LT1121ACS8-5#PBF	LT1121ACS8-5#TRPBF	LT1121AHVCS8#PBF	LT1121AHVCS8#TRPBF	LT1121AHVIS8#PBF	LT1121AHVIS8#TRPBF	LT1121AIS8#PBF	LT1121AIS8#TRPBF	LT1121AIS8-3.3#PBF	LT1121AIS8-3.3#TRPBF	LT1121AIS8-5#PBF	LT1121AIS8-5#TRPBF	LT1121CN8#PBF	LT1121CN8-3.3#PBF	LT1121CN8-5#PBF	LT1121CS8#PBF	LT1121CS8#TRPBF	LT1121CS8-3.3#PBF	LT1121CS8-3.3#TRPBF	LT1121CS8-5#PBF	LT1121CS8-5#TRPBF	LT1121CST-3.3#PBF	LT1121CST-3.3#TRPBF	LT1121CST-5#PBF	LT1121CST-5#TRPBF	LT1121CZ-3.3#PBF	LT1121CZ-3.3#TRPBF	LT1121CZ-5#PBF	LT1121CZ-5#TRPBF	LT1121HVCS8#PBF	LT1121HVCS8#TRPBF	LT1121HVIS8#PBF	LT1121HVIS8#TRPBF	LT1121IN8#PBF	LT1121IN8-3.3#PBF	LT1121IN8-5#PBF	LT1121IS8#PBF	LT1121IS8#TRPBF	LT1121IS8-3.3#PBF	LT1121IS8-3.3#TRPBF	LT1121IS8-5#PBF	LT1121IS8-5#TRPBF	LT1121IST-3.3#PBF	LT1121IST-3.3#TRPBF	LT1121IST-5#PBF	LT1121IST-5#TRPBF	LT1121IZ-3.3#PBF	LT1121IZ-3.3#TRPBF	LT1121IZ-5#PBF	LT1121IZ-5#TRPBF
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Discrete Pass Element	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Dropout Voltage, V	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42
Export Control	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Features	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown	Shutdown
Ishutdown, µA	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16
Isupply, mA	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03
Max Junction Temp, Deg	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150
Number of Outputs	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150	0.150
Output Voltage	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5	Adj, 3.3, 5
Theta JA	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)	120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)
Type	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP
Vin Max, V	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36
Vin Min, V	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17	4.17
Vout Max, V	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
Vout Min, V	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75	3.75

Plan ecológico

	LT1121ACS8#PBF	LT1121ACS8#TRPBF	LT1121ACS8-3.3#PBF	LT1121ACS8-3.3#TRPBF	LT1121ACS8-5#PBF	LT1121ACS8-5#TRPBF	LT1121AHVCS8#PBF	LT1121AHVCS8#TRPBF	LT1121AHVIS8#PBF	LT1121AHVIS8#TRPBF	LT1121AIS8#PBF	LT1121AIS8#TRPBF	LT1121AIS8-3.3#PBF	LT1121AIS8-3.3#TRPBF	LT1121AIS8-5#PBF	LT1121AIS8-5#TRPBF	LT1121CN8#PBF	LT1121CN8-3.3#PBF	LT1121CN8-5#PBF	LT1121CS8#PBF	LT1121CS8#TRPBF	LT1121CS8-3.3#PBF	LT1121CS8-3.3#TRPBF	LT1121CS8-5#PBF	LT1121CS8-5#TRPBF	LT1121CST-3.3#PBF	LT1121CST-3.3#TRPBF	LT1121CST-5#PBF	LT1121CST-5#TRPBF	LT1121CZ-3.3#PBF	LT1121CZ-3.3#TRPBF	LT1121CZ-5#PBF	LT1121CZ-5#TRPBF	LT1121HVCS8#PBF	LT1121HVCS8#TRPBF	LT1121HVIS8#PBF	LT1121HVIS8#TRPBF	LT1121IN8#PBF	LT1121IN8-3.3#PBF	LT1121IN8-5#PBF	LT1121IS8#PBF	LT1121IS8#TRPBF	LT1121IS8-3.3#PBF	LT1121IS8-3.3#TRPBF	LT1121IS8-5#PBF	LT1121IS8-5#TRPBF	LT1121IST-3.3#PBF	LT1121IST-3.3#TRPBF	LT1121IST-5#PBF	LT1121IST-5#TRPBF	LT1121IZ-3.3#PBF	LT1121IZ-3.3#TRPBF	LT1121IZ-5#PBF	LT1121IZ-5#TRPBF
RoHS	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente	Obediente

Notas de aplicación

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Power Conditioning for Notebook and Palmtop Systems &mdash AN51
PDF, 260 Kb, Archivo publicado: agosto 3, 1992
Notebook and palmtop systems need a number of voltages developed from a battery. Competitive solutions require small size, high efficiency and light weight. This publication includes circuits for high efficiency 5V and 3.3V switching and linear regulators, back light display drivers and battery chargers. All the circuits are specifically tailored for the requirements outlined above.
Extracto del documento
Application Note 51
August 1992
Power Conditioning for Notebook and Palmtop Systems
Robert Dobkin
Carl Nelson
Dennis OвЂ™Neill
Steve Pietkiewicz
Tim Skovmand
Milt Wilcox
INTRODUCTION Battery systems include NiCad, nickel-hydride, lead acid,
and rechargeable lithium, as well as throw-away alkaline
batteries. The ability to power condition a wide range
of batteries makes the ultimate product much more
attractive because power sources can be interchanged,
increasing overall system versatility. a very high efficiency (Figure 1) 5V or 3.3V step-down
(buck) switching regulator. These regulators feature a
low-loss saturating NPN switch that is normally configured with the negative terminal (emitter) at ground. The
LT1432 allows the switch to be floated as required in a
step-down converter, yet still provides full switch saturation for highest efficiency.
Burst ModeTM is a trademark of Linear Technology Coporation. 100
NORMAL MODE
(USE AMPS SCALE)
90 EFFICIENCY (%) Notebook and palmtop systems need a multiplicity of …
Descargar
Micropower High Side MOSFET Drivers &mdash AN53
PDF, 226 Kb, Archivo publicado: enero 3, 1993
This application note describes the operation of high-side Nchannel MOSFET switch drivers designed specifically for operation in battery-powered equipment, such as notebook and palmtop computers and portable medical instruments. A selection guide simplifies the proper choice of MOSFET and driver for a particular high-side switch application. Circuits to drive and protect load impedances ranging from large inductors to large capacitors are described and a section on surface mount and copper clad shunts is included.
Extracto del documento
Application Note 53
January 1993
Micropower High Side MOSFET Drivers
Tim Skovmand
Portable electronic equipment, such as notebook and
palmtop computers, portable medical instruments and
battery powered tools, are increasingly dependent upon
efficient power management to meet the challenge of
extracting more useful energy (time) from less battery
volume and weight.
One link in the power management chain which has
received increasing scrutiny, as power supply efficiencies
soar above 90%, is the logic controlled power switch.
Large sections of a typical notebook computer system, for
example, are powered via topside or вЂњhigh sideвЂќ MOSFET
switches. These switches can become significant sources
of power loss if not properly designed.
At first glance, P-channel MOSFETs appear to be the
natural choice for high side switching. Unfortunately, the
RDS(ON) exhibited by most P-channels is prohibitively
high. (Mother Nature has decreed that electron mobility
shall exceed hole mobility in silicon by about 2.5 times, so
that a P-channel MOSFET with the same RDS(ON) and …
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Power Conversion from Milliamps to Amps at Ultra-High Efficiency (Up to 95%) &mdash AN54
PDF, 466 Kb, Archivo publicado: marzo 1, 1993
This application note discusses the use of the LTC1147, LTC1148, and LTC1149 ultra high efficiency switching regulators in a wide variety of applications. These controllers feature a current-mode architecture which includes an automatic low current operating mode called Burst ModeTM operation, making greater than 90% efficiencies possible at output currents as low as 10mA. This feature maximizes battery life while a product is in sleep or standby modes. In addition, the LTC1148 and LTC1149 are synchronous switching regulators which achieve high efficiency conversion from 10mA to 10A.
Extracto del documento
Application Note 54
March 1993
Power Conversion from Milliamps to Amps at Ultra-High
Efficiency (Up to 95%)
Dimitry Goder
Randy Flatness
INTRODUCTION
High efficiency is frequently the main goal for power
supplies in portable computers and hand-held equipment.
Efficient converters are necessary in these applications to
minimize power drain on the input source (batteries, etc.)
and heat buildup in the power components, allowing for
smaller, lighter, and longer-lived systems. Power conversion efficiency must be in the 90% range in order to meet
these goals. This application note features power supply
circuits that satisfy these design requirements and attain
high efficiency over a wide operating range.
The recent development of the LTCВ®1142, LTC1143,
LTC1147, LTC1148, and LTC1149 makes ultra-high efficiency conversion possible. In addition, the LTC1148,
LTC1149, and LTC1142 are synchronous switching regulators, achieving high efficiency conversion at output
currents in excess of 10A. These controllers feature a current mode architecture that has automatic Burst
ModeTM operation at low currents. This technology makes
90% efficiencies possible at output currents as low as
10mA, maximizing battery life while a product is in sleep …
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5V to 3.3V Converters for Microprocessor Systems &mdash AN58
PDF, 310 Kb, Archivo publicado: sept 1, 1993
Many popular microprocessors operate from 3.3V supplies, yet they are used in systems where the predominate source of power is 5V. AN58 presents a collection of both linear and switching regulator solutions for conversion of 5V to 3.3V at currents ranging from 100mA to 20A. Applications information and a comparison of various bypass capacitor types is included. Most of the designs can be easily modified for other intermediate voltages such as 3.45V, 3.7V, and 4.1V.
Extracto del documento
Application Note 58
September 1993
5V to 3.3V Converters for Microprocessor Systems
Robert Dobkin, Mitchell Lee, Dennis O'Neill and Milt Wilcox
Introduction Linear Regulators The new generation of high performance microprocessors are built on dense, low breakdown voltage processes
in order to accommodate increased transistor counts.
These new processors require high current power at 3.3V,
developed from the 5V input used to power the rest of the
system. Special techniques are required to ensure proper
operation of the microprocessor and good heat dissipation within the computer system. Table 1 shows the range of components available for linear
regulation of 3.3V with a 5V input. With only 1.7V of
headroom, low dropout is essential. Low dropout regulators are available delivering currents from 125mA to 7.5A,
allowing almost any microprocessor to be powered with a
local 3.3V generation circuit. The first four devices (LT1020,
LT1120, LT1121 and LT1129) are PNP micropower low
dropout regulators. Since PNP transistors are much larger
than monolithic NPNs, higher current regulators use an
NPN pass device. The LT1117, LT1086, LT1083 through
LT1085, and LT1087 all use NPN pass devices. The NPN
structure requires about 1.2V headroom compared to the
400mV to 500mV dropout typical of PNP regulators, and
ground current of 5mA or 10mA, independent of output
current. Because of this constant quiescent current, the …
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PCMCIA Card and Card Socket Power Management: &mdash AN60
PDF, 260 Kb, Archivo publicado: enero 1, 1995
Most portable systems have expansion sockets conforming to the standards set by the Personal Computer Memory Card International Association (PCMCIA). This standard requires the host to perform an unusual amount of switching on both the VCC and VPP voltage lines. Card designers face difficult power management and DC/DC conversion issues of their own. Board real estate and component height are at a premium making design difficult and component selection critical. This application note discusses in detail both the host and card designer issues and highlights several new products designed specifically for these applications.
Extracto del documento
Application Note 60
January 1995
PCMCIA Card and Card Socket Power Management
Doug La Porte
INTRODUCTION
Most portable computers have built-in sockets to accept
small PC cards for use as extended memories, fax modems, network interfaces, wireless communicators and a
wide assortment of other functions. The Personal Computer Memory Card International Association (PCMCIA)
has released specifications that outline the general power
requirements for these cards.
The specification calls for an unusual amount of voltage
switching. Both supplies are switchable to different voltages to accommodate a wide range of card types. The VCC
supply must provide either 3.3V or 5V. The VPP supply
must source 12V, 3.3V, 5V, 0V and realize a high impedance state. These diverse, specific requirements call for
specialized solutions.
PC card designers may want to design their cards to
require the VCC supply only. Flash memory card designers who need to ensure a clean VPP supply may generate
their own 12V on the card. Type I PC cards, at an outside
thickness of 3.3mm, require ultra-thin highly efficient
circuitry. The DC/DC converter IC, inductor, capacitors
and diodes are critical components that require unique
design to meet the stringent height requirements.
PCMCIA SOCKET POWER MANAGEMENT …
Descargar
Linear Technology Magazine Circuit Collection, Volume III &mdash AN67
PDF, 1.2 Mb, Archivo publicado: sept 1, 1996
Application Note 67 is a collection of circuits for data conversion, interface and signal processing from the first five years of Linear Technology. This application note includes circuits such as fast video multiplexers for high speed video, an ultraselective bandpass filter circuit with adjustable gain, and a fully differential, 8-channel, 12-bit A/D system. The categories included in this app note are data conversion, interface, filters, instrumentation, video/op amps and miscellaneous circuits.
Extracto del documento
Application Note 67
September 1996
Linear Technology Magazine Circuit Collection, Volume III
Data Conversion, Interface and Signal Processing
Richard Markell, Editor
INTRODUCTION
Application Note 67 is a collection of circuits from the first
five years of Linear Technology, targeting data conversion,
interface and signal processing applications. This
Application Note includes circuits such as fast video
multiplexers for high speed video, an ultraselective
bandpass filter circuit with adjustable gain and a fully differential, 8-channel, 12-bit A/D system. The categories
included herein are data conversion, interface, filters,
instrumentation, video/op amps and miscellaneous
circuits. Application Note 66, which covers power products
and circuits from Linear Technology вЂ™s first five years, is
also available from LTC. ARTICLE INDEX
Data Conversion . 3
Fully Differential, 8-Channel, 12-Bit A/D System Using the LTCВ®1390 and LTC1410 . 3
12-Bit DAC Applications . 5
LTC1329 Micropower, 8-Bit, Current Output DAC Used for Power Supply Adjustment,
Trimmer Pot Replacement . 7
12-Bit Cold Junction Compensated, Temperature Control System with Shutdown . 8 …

Notas de Diseño

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2-Phase, Dual Switching Regulator Fits in Tight Places &mdash DN210
PDF, 82 Kb, Archivo publicado: agosto 1, 1999
Extracto del documento
advertisement 2-Phase Switching Regulator Fits in Tight Places
Design Note 210
Steve Hobrecht The third generation switching regulator controllers
from Linear Technology address these new requirements. The LTC В®1628, a 2-phase, constant frequency,
dual synchronous buck controller, has been speciп¬Ѓcally
designed to minimize both the size and total cost of the
power system while delivering the highest efп¬Ѓciency
in the industry.
A 2-phase switching technique minimizes the peak
and resultant RMS input current while doubling the
effective frequency of the input current pulses. The
input capacitor ESR requirement is reduced by 40%
and the capacitance requirement is reduced by 75%
when compared to a single phase controller solution!
Ceramic input capacitors provide an ideal choice for
the resultant requirements. Figure 1 contrasts the
power loss due to the input RMS ripple current for a
single and 2-phase solution over the 5V to 25V input
voltage range for a 5V/3A and 3.3V/3A power supply.
The input path resistive losses include the ESR of the
input capacitor, internal battery resistance, PC trace/
connector losses, fuse resistance and diode or MOSFET
resistance that may be used in the power path for …
Descargar
Techniques for Deriving 3.3V from 5V Supplies &mdash DN74
PDF, 73 Kb, Archivo publicado: sept 1, 1993
Extracto del documento
advertisement Techniques for Deriving 3.3V from 5V Supplies вЂ“ Design Note 74
Mitchell Lee
Microprocessor chip sets and logic families that operate from 3.3V supplies are gaining acceptance in both
desktop and portable computers. Computing rates, and
in most cases, energy consumed by these circuits show
a strong improvement over 5V technology. The main
power supply in most systems is still 5V, necessitating
a local 5V to 3.3V regulator.
Linear regulators are viable solutions at lower (IO в‰¤ 1A)
currents, but they must have a low dropout voltage in
order to maintain regulation with a worst-case input
5 4.5V TO 5.5V IN OUT 1 + LT1129-3.3
4 SHUTDOWN SENSE 2 GND 3.3V OUT
700mA
3.3ОјF
SOLID TANTALUM of only 4.5V. Figure 1 shows a circuit that converts a
4.5V minimum input to 3.3V with an output tolerance
of only 3% (100mV). The LTВ®1129-3.3 can handle up to
700mA in surface mount conп¬Ѓgurations, and includes
both 16ОјA shutdown and 50ОјA standby currents for
system sleep modes. Unlike other linear regulators, the
LT1129-3.3 combines both low dropout and low voltage
operation. Small input and output capacitors facilitate …
Descargar
PC Card Power Management Techniques &mdash DN76
PDF, 77 Kb, Archivo publicado: nov 1, 1993
Extracto del documento
PC Card Power Management Techniques вЂ“ Design Note 76
Tim Skovmand
Most portable computers have sockets built in to accept
small PC cards for use as extended memories, data/fax
modems, network interfaces, wireless communicators,
etc. The Personal Computer Memory Card International
Association (PCMCIA) has released speciп¬Ѓcations, 1.0
and 2.0, which outline the general voltage and power
requirements for these cards.
Power is provided by the host computer to the PC card
through the card socket via the main VCC supply pin(s)
and the VPP programming supply pins. Both supplies
can be switched to different voltages to accommodate
a wide range of card types and applications.
The VCC supply can be switched from 5V to 3.3V and
must be capable of supplying upwards of 1A for short
periods of time and hundreds of milliamps continuously. Three low resistance MOSFET switches are typically used to select the card VCC power as shown in
Figure 1. The LTC В®1165 inverting triple MOSFET driver
accepts active-low logic commands directly from a
common PCMCIA controller and generates gate drive
voltages above the positive rail to fully enhance low
5V RDS(ON) N-channel MOSFET switches. Two back-to-back
MOSFET switches, Q2 and Q3, isolate the parasitic …
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Triple Output 3.3V, 5V, and 12V High Efficiency Notebook Power Supply &mdash DN78
PDF, 78 Kb, Archivo publicado: enero 1, 1994
Extracto del documento
advertisement Triple Output 3.3V, 5V, and 12V High Efficiency
Notebook Power Supply вЂ“ Design Note 78
Randy G. Flatness The operating current levels for both regulator sections are user programmable, via external current
sense resistors, to set current limit. A wide input
voltage range for the LTC1142 allows operation
from 4V to 16V. The LTC1142HV extends this voltage range to 20V, permitting operation with up to
12-cell battery packs.
Both regulator blocks in the LTC1142 and LTC1142HV
use a constant off-time current mode architectures
with Burst Mode operation. This results in a power
supply that has very high efп¬Ѓciency over a wide load
current range, fast transient response, and very low
dropout. The LTC1142 is ideal for applications requiring 5V and 3.3V output voltages with high conversion
efп¬Ѓciencies over a wide load current range in a small
amount of board space.
The application circuit in Figure 2 is conп¬Ѓgured to
provide output voltages of 3.3V, 5V, and 12V. The
current capability of both the 3.3V and 5V outputs
is 2A (2.5A peak). The logic controlled 12V output
can provide 150mA (200mA peak), which is ideal for
п¬‚ash memory applications. The operating efп¬Ѓciency
shown in Figure 1 exceeds 90% for both the 3.3V
and 5V sections. 100 LTC1142 …
Descargar
5V to 3.3V Regulator with Fail-Safe Switchover &mdash DN82
PDF, 74 Kb, Archivo publicado: mayo 1, 1994
Extracto del documento
advertisement 5V to 3.3V Regulator with Fail-Safe Switchover вЂ“ Design Note 82
Mitchell Lee
Newer microprocessors designed for replacing existing
5V units operate from lower voltage supplies. In the past
a processor swap was simply a matter of removing one
IC and replacing it with an updated version. But now
the upgrade path involves switching from a 5V chip to
one that requires 3.xxV.
One means of changing supply voltage from 5V to 3.xxV
is to clip a jumper that bypasses a local 3.xxV regulator.
This is not a good solution since it leaves too much to
chance. Failure to remove the jumper can result in the
instant destruction of the new microprocessor upon
application of power. A means of automatically sensing
the presence of a 3.xxV or 5V processor is necessary.
Intel microprocessors include a special pin called
вЂњVOLDETвЂќ which can be used to determine whether
or not a particular chip needs 3.xxV or 5V. Figure 1
shows a simple circuit that takes advantage of this
pin to automatically вЂњjumper outвЂќ a 3.xxV regulator
whenever a 5V processor is inserted into the socket. VOLDET is pulled low on 3.xx processors; it is buffered
by transistor Q2 which grounds the gate of a bypassing
switch (Q1). Q1 is turned off leaving the LTВ®1085 to …
Descargar
5V to 3.3V Circuit Collection &mdash DN91
PDF, 74 Kb, Archivo publicado: nov 1, 1994
Extracto del documento
advertisement 5V to 3.3V Circuit Collection вЂ“ Design Note 91
Richard Markell and Craig Varga
High Efп¬Ѓciency 3.3V Regulator
INPUT
VOLTAGE
5V + 6
VIN
7
3 IPGM SHDN 8 3.3V Battery-Powered Supply with Shutdown
8 3w
22ОјF*
25V LBIN 50ОјHвЂ GND 1N5818 + 2w
47ОјF**
16V 4 * AVX TPSD226K025
** AVX TPSD476K016
вЂ COILTRONICS CTX50-4 OUT 1 LT1121-3.3 5V
5 1
VOUT
LTC1174-3.3
2
5
LBOUT
SW IN 0.1ОјF + 1ОјF …
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12-Bit Rail-to-Rail Micropower DACs in an SO-8 &mdash DN96
PDF, 76 Kb, Archivo publicado: feb 1, 1995
Extracto del documento
12-Bit Rail-to-Rail Micropower DACs in an SO-8
Design Note 96
Hassan Malik and Jim Brubaker
The LTC В®1451, LTC1452 and LTC1453 are complete,
single supply, rail-to-rail voltage output 12-bit digitalto-analog (DAC) converters. They include an output
buffer ampliп¬Ѓer and a space saving SPI compatible
three-wire serial interface. There is also a data output pin
that allows daisy-chaining multiple DACs. These DACs
use a proprietary architecture which guarantees a DNL
(Differential Nonlinearity) error of less than 0.5LSB. The
typical DNL error is about 0.2LSB as shown in FigureВ 1.
There is a built-in power-on reset that resets the output
to zero scale. The output ampliп¬Ѓer can swing to within
5mV of VCC when unloaded and can source or sink 5mA
even at a 4.5V supply. These DACs come in an 8-pin
PDIP and SO-8 package.
5V and 3V Operation
The LTC1451 has an on-board reference of 2.048V and
a nominal output swing of 4.095V. It operates from a
single 4.5V to 5.5V supply dissipating 2mW (ICC(TYP)
= 400ОјA).
The LTC1452 is a multiplying DAC with no on-board
reference and a full-scale output of twice the reference …

Linea modelo

Serie: LT1121 (54)

LT1121ACS8#PBF LT1121ACS8#TRPBF LT1121ACS8-3.3#PBF LT1121ACS8-3.3#TRPBF LT1121ACS8-5#PBF LT1121ACS8-5#TRPBF LT1121AHVCS8#PBF LT1121AHVCS8#TRPBF LT1121AHVIS8#PBF LT1121AHVIS8#TRPBF LT1121AIS8#PBF LT1121AIS8#TRPBF LT1121AIS8-3.3#PBF LT1121AIS8-3.3#TRPBF LT1121AIS8-5#PBF LT1121AIS8-5#TRPBF LT1121CN8#PBF LT1121CN8-3.3#PBF LT1121CN8-5#PBF LT1121CS8#PBF LT1121CS8#TRPBF LT1121CS8-3.3#PBF LT1121CS8-3.3#TRPBF LT1121CS8-5#PBF LT1121CS8-5#TRPBF LT1121CST-3.3#PBF LT1121CST-3.3#TRPBF LT1121CST-5#PBF LT1121CST-5#TRPBF LT1121CZ-3.3#PBF LT1121CZ-3.3#TRPBF LT1121CZ-5#PBF LT1121CZ-5#TRPBF LT1121HVCS8#PBF LT1121HVCS8#TRPBF LT1121HVIS8#PBF LT1121HVIS8#TRPBF LT1121IN8#PBF LT1121IN8-3.3#PBF LT1121IN8-5#PBF LT1121IS8#PBF LT1121IS8#TRPBF LT1121IS8-3.3#PBF LT1121IS8-3.3#TRPBF LT1121IS8-5#PBF LT1121IS8-5#TRPBF LT1121IST-3.3#PBF LT1121IST-3.3#TRPBF LT1121IST-5#PBF LT1121IST-5#TRPBF LT1121IZ-3.3#PBF LT1121IZ-3.3#TRPBF LT1121IZ-5#PBF LT1121IZ-5#TRPBF

Clasificación del fabricante

Power Management > LDO Linear Regulators > Positive Linear Regulators (LDO)