UC3833

更新时间： 2024-11-30 22:41:47

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
8页	735K
描述
Precision Low Dropout Linear Controllers

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UC3833 数据手册

UC1832/3

UC2832/3

UC3832/3

Precision Low Dropout Linear Controllers

FEATURES

DESCRIPTION

•

Precision 1% Reference

The UC1832 and UC1833 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

•

4.5V to 36V Operation

100mA Output Drive, Source or

Sink

•

Under-Voltage Lockout

Additional Features of the UC1832

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 UC1833 family includes the basic functions of this design in a low-cost, 8-

pin mini-dip package, while the UC1832 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); industrial (–25°C to 85°C), order UC2832/3

(N or J); and military (–55°C to 125°C), order UC1832/3J. Surface mount

packaging is also available.

•

Access to V_REFand E/A(+)

Logic-Level Disable Input

BLOCK DIAGRAMS

UDG-92040

6/94

12 3 4 5 6 7 8

中文翻译

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UC3833 替代型号

型号	品牌	替代类型	描述	数据表
UC1833	TI	功能相似	Precision Low Dropout Linear Controllers
UC2833	TI	功能相似	Precision Low Dropout Linear Controllers

与UC3833相关器件

型号	品牌	获取价格	描述	数据表
UC3833DW	TI	获取价格	Precision Low Dropout Linear Controllers
UC3833DWG4	TI	获取价格	Precision Low Dropout Linear Controllers
UC3833DWTR	TI	获取价格	Precision Low Dropout Linear Controllers
UC3833DWTRG4	TI	获取价格	Precision Low Dropout Linear Controllers
UC3833J	TI	获取价格	Precision Low Dropout Linear Controllers
UC3833N	TI	获取价格	Precision Low Dropout Linear Controllers
UC3833NG4	TI	获取价格	Precision Low Dropout Linear Controllers
UC3833Q	ETC	获取价格	Positive Adjustable Voltage Regulator
UC3833QTR	ETC	获取价格	Positive Adjustable Voltage Regulator
UC3834	TI	获取价格	High Efficiency Linear Regulator

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