HT72BXX datasheet(1/13 Pages) HOLTEK

Part #	HT72BXX

Description	High PSRR 300mA LDO Regulator

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Manufacturer	HOLTEK [Holtek Semiconductor Inc]

Direct Link	http://www.holtek.com

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Rev. 1.00

1

August 24, 2011

Rev. 0.00

PB

August 24, 2011

HT72Bxx

High PSRR 300mA LDO Regulator

Features

• OutputVoltage:1.5V/1.8V/2.5V/2.8V/

3.0V/3.3V/5V

• HighOutputVoltageAccuracy:±2%

• HT72B25LowVoltageDrop:0.34V(Typ.)

(VOUT=2.5V@IOUT=300mA)

• MaximumInputVoltage:7.0V

• GuaranteedOutputCurrent:300mA

• LowPowerConsumption:18uA(Typ.)

• HighRippleRejection:70dB(1kHz@IOUT=30mA)

• Power-savingShutdownMode

• OverTemperatureProtection

• CurrentLimiting

• SOT23-5,SOT89Package

Applications

• Portablecommunicationequipment

• Portablemusicplayer

• Electricalappliancessuchascameras,VCRsand

camcorders

• Battery-poweredequipment

General Description

The HT72Bxx series are CMOS-based voltage

regulatorICswithhighoutputvoltageaccuracy,low

quiescentcurrent,lowonResistance,andhighripple

rejection.EachoftheseICsconsistsofavoltage

referenceunit,anerroramplifier,resistor-netfor

voltagesetting,acurrentlimitcircuit,achipenable

circuit,andsoon.

TheHT72Bxx’scurrentlimiters'foldbackcircuit

alsooperatesasashortcircuitprotectfunctionforthe

outputcurrentlimiter.

TheseICsperformwithlowdropoutvoltageandthe

chip-enablefunction.ThequiescentcurrentofthisIC

isonly18μA,andthelinetransientresponseandthe

loadtransientresponseofHT72Bxxareexcellent,

thustheseICsareverysuitableforthepowersupply

forhand-heldcommunicationequipment.

Thespace-savingSOT23-5,SOT89packagewillbe

anattractiveadditionalfeatureforpocketandhand-

heldapplications.

Selection Table

Part No.

Output Voltage

Tolerance

Package

HT72B15

1.5V

±2%

SOT23-5

SOT89

HT72B18

1.8V

HT72B25

2.5V

HT72B28

2.8V

HT72B30

3.0V

HT72B33

3.3V

HT72B50

5.0V

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HT72BXX Datasheet(PDF) 1 Page - Holtek Semiconductor Inc

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