Datasheet Texas Instruments UC2833J — Ficha de datos

Fabricante	Texas Instruments
Serie	UC2833
Numero de parte	UC2833J

Controladores lineales de baja caída de precisión 8-CDIP -40 a 85

Hojas de datos

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PDF, 1.6 Mb, Revisión: A, Archivo publicado: jun 3, 2003

Extracto del documento

UC1832
UC2832/3
UC3832/3 Precision Low Dropout Linear Controllers
FEATURES DESCRIPTION Precision 1% Reference Over-Current Sense Threshold
Accurate to 5% Programmable Duty-Ratio
Over-Current Protection 4.5 V to 36 V Operation 100mA Output Drive, Source, or
Sink Under-Voltage Lockout The UC2832 and UC3833 series of precision linear regulators include all the
control functions required in the design of very low dropout linear regulators.
Additionally, they feature an innovative duty-ratio current limiting technique
which provides peak load capability while limiting the average power dissipation of the external pass transistor during fault conditions. When the load current reaches an accurately programmed threshold, a gated-astable timer is
enabled, which switches the regulatorвЂ™s pass device off and on at an externally
programmable duty-ratio. During the on-time of the pass element, the output
current is limited to a value slightly higher than the trip threshold of the duty-ratio timer. The constant-current-limit is programmable on the UCx832 to allow
higher peak current during the on-time of the pass device. With duty-ratio control, high initial load demands and short circuit protection may both be accommodated without extra heat sinking or foldback current limiting. Additionally, if
the timer pin is grounded, the duty-ratio timer is disabled, and the IC operates
in constant-voltage/constant-current regulating mode. Additional Features of the UC2832
series: Adjustable Current Limit to
Current Sense Ratio Separate +VIN terminal Programmable Driver Current
Limit Access to VREF and E/A(+) Logic-Level Disable Input These ICвЂ™s include a 2 Volt (В±1%) reference, error amplifier, UVLO, and a high
current driver that has both source and sink outputs, allowing the use of either
NPN or PNP external pass transistors. Safe operation is assured by the inclusion of under-voltage lockout (UVLO) and thermal shutdown.
The UC3833 family includes the basic functions of this design in a low-cost, 8pin mini-dip package, while the UC2832 series provides added versatility with
the availability of 14 pins. Packaging options include plastic (N suffix), or ceramic (J suffix). Specified operating temperature ranges are: commercial (0В°C …

Precios

Estado

Estado del ciclo de vida	Obsoleto (El fabricante ha interrumpido la producción del dispositivo)
Disponibilidad de muestra del fabricante	No

Embalaje

Pin	8
Package Type	JG
Industry STD Term	CDIP
JEDEC Code	R-GDIP-T
Width (mm)	6.67
Length (mm)	9.6
Thickness (mm)	4.57
Pitch (mm)	2.54
Max Height (mm)	5.08
Mechanical Data	Descargar

Paramétricos

Additional Features	Overcurrent Protection Thermal Shutdown
Approx. Price (US$)	3.52 \| 1ku
Fixed Output Options(V)	2
Iq(Typ)(mA)	3.3
Operating Temperature Range(C)	-40 to 85
Output Options	Fixed Output
Package Group	SOIC
Package Size: mm2:W x L (PKG)	See datasheet (CDIP) See datasheet (PDIP)
Rating	Catalog
Vin(Max)(V)	40
Vin(Min)(V)	4.5
Vout(Min)(V)	2

Plan ecológico

RoHS	Desobediente
Pb gratis	No

Notas de aplicación

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U-152 A High-Performance Linear Regulator for Low Dropout Applications
PDF, 172 Kb, Archivo publicado: sept 5, 1999
The UC3832 and UC3833 series of precision linear regulators includes all the control functions required in the design of very low dropout linear regulators. Also, they feature an innovative duty-ratio current-limiting technique that provides peak load capability while limiting the average power dissipation of the external-pass transistor during fault conditions. A linear regulator design offers se
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DN-32 Optocoupler Feedback Drive Techniques
PDF, 90 Kb, Archivo publicado: sept 5, 1999
This design note describes ways to drive an optocoupler. One of the most popular is to use a TL431 Adjustable-Shunt Regulator. However a regulator-control lC-such as the UC3832 UC3833 or UC3836 substituted for the TL43431-provides numerous additional features besides regulating the output. Overcurrent limiting and fault-protection handshaking with external control logic and the introduction of

Linea modelo

Serie: UC2833 (4)

UC2833DW UC2833DWG4 UC2833DWTR UC2833J

Clasificación del fabricante

Semiconductors > Power Management > Linear Regulator (LDO) > LDO Controller (External FET)