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APL5551

Dual Channel 500mA/500mA Regulator + Reset IC

Anpec Electronics 

APL5551

Dual Channel 500mA/500mA Regulator + Reset IC

Features

General Description

• Low Quiescent Current : 110µA (No load)

• Low Dropout Voltage :

VDROP1 = 450mV @ 500mA

VDROP2 = 500mV @ 500mA

• Fixed Output Voltage :

VOUT1 = 3.3V/500mA

VOUT2 = 2.8V/500mA

• Stable with 4.7µF Output Capacitor

• Stable with Aluminum, Tantalum or Ceramic

The APL5551 is a dual-channel regulator with reset

function (specific voltage monitoring), and internal

delay circuit, set to detect 3.9V. Maximum input volt-

age is 6V, and both output1 and output2 can deliver up

to 450mA. The typical dropout voltage of both channel

is 500mV at 500mA loading. Design with an internal

P-channel MOSFET pass transistor, the APL5551 main-

tains a low supply current. Other features include, ther-

mal-shutdown protection, current limit protection to

ensure specified output current. The APL5551 comes

Capacitors

in miniature SOP-8 and SOP-8-P packages.

• Built in Thermal Protection

• Fast Transient Response

• Short Setting Time

Pin Configuration

• SOP-8, SOP-8-P with Thermal Pad Packages

• Adjustment-free Reset Detection Voltage :

SOP-8 (Top View)

SOP-8-P( Top View)

3.9V typ

• Easy to Set Delay Time from Voltage

Detection to Reset Release

• Lead Free Available (RoHS Compliant)

VIN

1

VOUT1

2

Cd 3

V DET

4

8 CONT

7 GND

6 RESET

5

VOUT2

VIN

1

VOUT1

2

Cd 3

VDET

4

8 CONT

7 GND

6 RESET

5

VOUT2

Applications

• Optical Storage System

= Thermal Pad

(connected to GND plane for better heat

dissipation)

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise

customers to obtain the latest version of relevant information to verify before placing orders.

Copyright © ANPEC Electronics Corp.

1

Rev. A.2 - Oct., 2005

www.anpec.com.tw

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