Datasheet > UC2832J

UC2832J

更新时间： 2024-11-04 20:56:27

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德州仪器 - TI		/
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UC2832J 数据手册

UC1832

UC2832/3

UC3832/3

Precision Low Dropout Linear Controllers

FEATURES

DESCRIPTION

•

Precision 1% Reference

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 dissipa-

tion of the external pass transistor during fault conditions. When the load cur-

rent reaches an accurately programmed threshold, a gated-astable timer is

enabled, which switches the regulator’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-ra-

tio 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 con-

trol, high initial load demands and short circuit protection may both be accom-

modated 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.

•

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

Additional Features of the UC2832

series:

•

Adjustable Current Limit to

Current Sense Ratio

These IC’s include a 2 Volt (±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 inclu-

sion of under-voltage lockout (UVLO) and thermal shutdown.

•

Separate +VIN terminal

Programmable Driver Current

Limit

The UC3833 family includes the basic functions of this design in a low-cost, 8-

pin mini-dip package, while the UC2832 series provides added versatility with

the availability of 14 pins. Packaging options include plastic (N suffix), or ce-

ramic (J suffix). Specified operating temperature ranges are: commercial (0°C

to 70°C), order UC3832/3 (N or J); and industrial (–40°C to 85°C), order

UC2832/3 (N or J). Surface mount packaging is also available.

•

Access to V_REFand E/A(+)

Logic-Level Disable Input

BLOCK DIAGRAMS

UDG-92040

SLUS387A - J UNE 1994 - REVISED - MAY 2003

12 3 4 5 6 7...21

中文翻译

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UC2832J 替代型号

型号	品牌	替代类型	描述	数据表
UC2832DW	TI	完全替代	Precision Low Dropout Linear Controllers
UC3832DWTR	TI	类似代替	Precision Low Dropout Linear Controllers
UC3832N	TI	类似代替	Precision Low Dropout Linear Controllers

与UC2832J相关器件

型号	品牌	获取价格	描述	数据表
UC2832L	TI	获取价格	ADJUSTABLE POSITIVE LDO REGULATOR, CQCC20, CERAMIC, LCC-20
UC2832N	TI	获取价格	SPECIALTY ANALOG CIRCUIT, PDIP14, GREEN, PLASTIC, MS-001AA, DIP-14
UC2832Q	TI	获取价格	SPECIALTY ANALOG CIRCUIT, PQCC20, PLASTIC, LCC-20
UC2832QTR	TI	获取价格	SPECIALTY ANALOG CIRCUIT, PQCC20, PLASTIC, LCC-20
UC2832TDWEP	TI	获取价格	PRECISION LOW DROPOUT LINEAR CONTROLLER
UC2832TDWREP	TI	获取价格	PRECISION LOW DROPOUT LINEAR CONTROLLER
UC2833	TI	获取价格	Precision Low Dropout Linear Controllers
UC2833DW	TI	获取价格	Precision Low Dropout Linear Controllers
UC2833DWG4	TI	获取价格	Precision Low Dropout Linear Controllers
UC2833DWTR	TI	获取价格	Precision Low Dropout Linear Controllers

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