Datasheet > UCC284-5

UCC284-5

更新时间： 2024-11-22 21:55:27

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
17页	291K
描述
LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR

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UCC284-5 数据手册

UCC284–5, UCC284–12, UCC284–ADJ, UCC384–5, UCC384–12, UCC384–ADJ

LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR

SLUS234D – JANUARY 2000 – REVISED FEBRUARY 2002

DP PACKAGE

(FRONT VIEW)

Precision Negative Series Pass Voltage

Regulation

0.2 V Dropout at 0.5 A

VOUTS 1

SD/CT

VIN

Wide Input Voltage Range –3.2 V to –15 V

Low Quiescent Current Irrespective of Load

Simple Logic Shutdown Interfacing

–5 V, –12 V, and Adjustable Output

2.5% Duty Cycle Short Circuit Protection

VIN

VOUT

GND

description

The UCC384-x family of negative linear-series pass regulators is tailored for low-dropout applications where

low-quiescent power is important. Fabricated with a BCDMOS technology ideally suited for low input-to-output

differential applications, the UCC384-x passes 0.5 A while requiring only 0.2 V of input-voltage headroom.

Dropout voltage decreases linearly with output current, so that dropout at 50 mA is less than 20 mV.

Quiescent current consumption for the device under normal (non-dropout) conditions is typically 200 µA. An

integrated charge pump is internally enabled only when the device is operating near dropout with low VIN. This

ensured that the device meets the dropout specifications even for maximum load current and a VIN of –3.2 V

with only a modest increase in quiescent current. Quiescent current is always less than 350 µA, with the charge

pump enabled. The quiescent current of the UCC384 does not increase with load current.

Short-circuit current is internally limited. The device responds to a sustained overcurrent condition by turning

off after a t

beginspulsingonandoffatthet /t

delay. The device then stays off for a period, t

, that is 40 times the t

delay. The device then

OFF

dutycycleof2.5%.Thisdrasticallyreducesthepowerdissipationduring

ON OFF

short circuit such that heat sinking, if at all required, must only accommodate normal operation. An external

capacitor sets the on time. The off time is always 40 times t

The UCCx84-x can be shutdown to 45 µA (maximum) by pulling the SD/CT pin more positive than –0.7 V. To

allow for simpler interfacing, the SD/CT pin may be pulled up to 6 V above the ground pin without turning on

clamping diodes.

Internal power dissipation is further controlled with thermal-overload protection circuitry. Thermal shutdown

occurs if the junction temperature exceeds 140°C. The chip remains off until the temperature has dropped 20°C

(T = 120°C).

AVAILABLE OPTIONS

OUTPUT VOLTAGE (V)

PACKAGE DEVICES

(SOIC) DP

TYP

–5

UCC284DP–5

–12

ADJ

–5

UCC284DP–12

UCC284DP–ADJ

UCC384DP–5

–40°C to 85°C

0°C to 70°C

–12

ADJ

UCC384DP–12

UCC384DP–ADJ

†

All package types are available taped and reeled. Add TR suffix to device type

(e.g. UCC284DP–5TR) to order quantities of 3000 devices per reel.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

12 3 4 5 6 7...17

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与UCC284-5相关器件

型号	品牌	获取价格	描述	数据表
UCC284-ADJ	TI	获取价格	LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
UCC284DP-12	TI	获取价格	LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
UCC284DP-12G4	TI	获取价格	Low-Dropout, 0.5-A, Negative Linear Regulator 8-SOIC -40 to 85
UCC284DP-12TR	ETC	获取价格	VOLT REGULATOR\|FIXED\|-12V\|BICMOS\|SOP\|8PIN\|PLASTIC
UCC284DP-5	TI	获取价格	LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
UCC284DP-5G4	TI	获取价格	LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
UCC284DP-5TR	ETC	获取价格	VOLT REGULATOR\|FIXED\|-5V\|BICMOS\|SOP\|8PIN\|PLASTIC
UCC284DP-ADJ	TI	获取价格	LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
UCC284DP-ADJG4	TI	获取价格	LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
UCC284DP-ADJTR	ETC	获取价格	VOLT REGULATOR\|ADJUSTABLE\|-1.25V TO -12V\|BICMOS\|SOP\|8PIN\|PLASTIC

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