Datasheet > UCC384-12

UCC384-12

更新时间： 2024-09-24 22:39:59

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
10页	184K
描述
Low Dropout 0.5A Negative Linear Regulator

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中文翻译

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数据手册

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UCC384-12 数据手册

UCC284-5/-12/-ADJ

UCC384-5/-12/-ADJ

Low Dropout 0.5A Negative Linear Regulator

BLOCK DIAGRAM

FEATURES

• Precision Negative Series

Pass Voltage Regulation

(+)

GND

• 0.2V Drop Out at 0.5A

1µA

DISCHARGE

• Wide Input voltage Range

–3.2V to –15V

UCC384-ADJ

UCC384-5

OPEN

–2.2V

SHUTDOWN

375K 125K

375K 43.6K

–

–0.6V

1.25V

50k

UCC384-12

• Low Quiescent Current

–

Irrespective of Load

–1.6V

–2.6V

TON

TOFF

SD/CT

• Simple Logic Shutdown

Interfacing

VPUMP

–

• –5V, –12V and Adjustable

Output

–

40µA

CHARGE

VOUTS

• 2.5% Duty Cycle Short Circuit

Protection

OVERCURRENT

700mA

–

• Remote Load Sensing for

VIN

(–)

THERMAL

SHUTDOWN

Accurate Load Regulation

• 8-Pin DP Package

UVLO

VOUT

(–)

UDG-99030

DESCRIPTION

The UCC384 family of negative linear series pass regula- Short circuit current is internally limited. The device re-

tors is tailored for low drop out applications where low sponds to a sustained over current condition by turning

quiescent power is important. Fabricated with

BCDMOS technology ideally suited for low input to out- riod, T_OFF, that is 40 times the T_ONdelay. The device

put differential applications, the UCC384 will pass 0.5A then begins pulsing on and off at the T_{ON/ OFF}duty cycle

off after a T_ONdelay. The device then stays off for a pe-

while requiring only 0.2V of input voltage headroom. of 2.5%. This drastically reduces the power dissipation

Drop out voltage decreases linearly with output current, during short circuit such that heat sinking, if at all re-

so that drop out at 50mA is less than 20mV.

quired, must only accommodate normal operation. An

external capacitor sets the on time. The off time is al-

Quiescent current consumption for the device under nor-

mal (non-drop out) conditions is typically 200µA. An inte-

ways 40 times T_ON

grated charge pump is internally enabled only when the The UCC384 can be shutdown to 45µA (maximum) by

device is operating near drop out with low VIN. This pulling the SD/CT pin more positive than –0.6V. To allow

guarantees that the device will meet the drop out specifi- for simpler interfacing, the SD/CT pin may be pulled up

cations even for maximum load current and a VIN of to +6V above the ground pin without turning on clamping

–3.2V with only a modest increase in quiescent current. diodes.

Quiescent current is always less than 350µA, with the

charge pump enabled. Quiescent current of the UCC384

does not increase with load current.

Internal power dissipation is further controlled with ther-

mal overload protection circuitry. Thermal shutdown oc-

curs if the junction temperature exceeds 140°C. The chip

will remain off until the temperature has dropped 20°C.

SLUS234A - JANUARY 2000

12 3 4 5 6 7...10

中文翻译

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与UCC384-12相关器件

型号	品牌	获取价格	描述	数据表
UCC384-5	TI	获取价格	Low Dropout 0.5A Negative Linear Regulator
UCC384-ADJ	TI	获取价格	Low Dropout 0.5A Negative Linear Regulator
UCC384DP-12	TI	获取价格	LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
UCC384DP-12G4	TI	获取价格	Single Output LDO, 500mA, Fixed(12V), Low Quiescent Current, wide Input Voltage Range 8-SO
UCC384DP-12TR	ETC	获取价格	VOLT REGULATOR\|FIXED\|-12V\|BICMOS\|SOP\|8PIN\|PLASTIC
UCC384DP-5	TI	获取价格	LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
UCC384DP-5G4	TI	获取价格	LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
UCC384DP-5TR	ETC	获取价格	VOLT REGULATOR\|FIXED\|-5V\|BICMOS\|SOP\|8PIN\|PLASTIC
UCC384DP-ADJ	TI	获取价格	Multi-Cal-System Evaluation Module
UCC384DP-ADJG4	TI	获取价格	LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR

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