Datasheet Linear Technology LTC3857 — Ficha de datos

Fabricante	Linear Technology
Serie	LTC3857

Controlador reductor síncrono bifásico dual I _Q , dual

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PDF, 453 Kb, Idioma: en, Archivo subido: sept 23, 2017, Páginas: 38
Low IQ, Dual, 2-Phase Synchronous Step-Down Controller

Extracto del documento

Precios

Embalaje

	LTC3857EUH#PBF	LTC3857EUH#TRPBF	LTC3857IUH#PBF	LTC3857IUH#TRPBF
N	1	2	3	4
Package	5x5 QFN-32 Dibujo del esquema del paquete	5x5 QFN-32 Dibujo del esquema del paquete	5x5 QFN-32 Dibujo del esquema del paquete	5x5 QFN-32 Dibujo del esquema del paquete
Package Code	UH	UH	UH	UH
Package Index	05-08-1693	05-08-1693	05-08-1693	05-08-1693
Pin Count	32	32	32	32

Paramétricos

Parameters / Models	LTC3857EUH#PBF	LTC3857EUH#TRPBF	LTC3857IUH#PBF	LTC3857IUH#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1381A-A	DC1381A-A	DC1381A-A	DC1381A-A
Design Tools	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File
Export Control	no	no	no	no
Features	Burst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power Good	Burst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power Good
Frequency, kHz	850	850	850	850
Frequency Adjust Range	50kHz - 900kHz	50kHz - 900kHz	50kHz - 900kHz	50kHz - 900kHz
Frequency Sync Range	75kHz - 850kHz	75kHz - 850kHz	75kHz - 850kHz	75kHz - 850kHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	0.01	0.01	0.01	0.01
Isupply, mA	0.05	0.05	0.05	0.05
Max Phases	2	2	2	2
Monolithic	no	no	no	no
Number of Outputs	2	2	2	2
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Output Current, A	25	25	25	25
Output Current 2, A	25	25	25	25
Over Voltage Protection, V	40	40	40	40
Polyphase	yes	yes	yes	yes
Sense Resistor	Rsense, DCR	Rsense, DCR	Rsense, DCR	Rsense, DCR
Switch Current, A	25	25	25	25
Switch Current 2, A	25	25	25	25
Synchronous	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck
Topology 1	Buck	Buck	Buck	Buck
Topology 2	Buck	Buck	Buck	Buck
Vin Max, V	38	38	38	38
Vin Min, V	4	4	4	4
Vout Max, V	24	24	24	24
Vout Maximum	24V	24V	24V	24V
Vout Min, V	0.8	0.8	0.8	0.8
Vout Min 2, V	.8	.8	.8	.8
Vref Accuracy Over Temp, %	1	1	1	1

Plan ecológico

	LTC3857EUH#PBF	LTC3857EUH#TRPBF	LTC3857IUH#PBF	LTC3857IUH#TRPBF
RoHS	Obediente	Obediente	Obediente	Obediente

Linea modelo

Serie: LTC3857 (4)

LTC3857EUH#PBF LTC3857EUH#TRPBF LTC3857IUH#PBF LTC3857IUH#TRPBF

Clasificación del fabricante

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | Micropower Buck Regulators | High Input Voltage Buck | External Power Switch Buck Controllers