Two-Channel Supervisory IC

Copyright

© ANPEC Electronics Corp. Rev.

Rev. A.1 - May., 2005

www.anpec.com.tw

1

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.

APL6535

Features

General Description

Applications

•

Graphics Cards

•

Portable Battery-Powered Equipment

•

µP Voltage Monitoring

•

Set-Top Boxes

• Notebook Computer

•

Multiple Supply System

•

2.6V to 5.5V Input Voltage Range

•

Low Quiescent Current : less than 50

µA

•

•

Adjustable Undervoltage Lockout for Each

Supply

•

Active high PGOOD Output

•

VMON Glitch Immunity : 30µs

Pinouts

°

The APL6535 is a two channel supervisory IC designed

to monitor voltage supplies in mP and digital system.

This IC can supervise any positive voltage using an

external resistor divider to translate to a lower voltage

for comparison to the internal 0.633V reference. Once

any VMON input falls below 0.633V the PGOOD out-

put is pulled low, the hysteresis of the internal refer-

ence is 15mV. The PGOOD pin has an internal 20kW

unnecessary. Each rail’s VMON point is independently

adjustable with a resistor divider. The PGOOD output

is guaranteed to be valid with IC bias lower than 1V.

This IC is designed to reject fast line transient glitches

30ms on VMON input. The PGOOD output is an open-

drain to allow ORing of multiple signals. If less than

four voltages are being monitored, connect the unused

for a reset of the PGOOD output when it is pulled

down below 0.5V. With an internal 10mA pull-up to

VCC, it can be signaled with common logic or pulled

to ground with a push button switch. APL6535 come

in a miniature SOT-23-5 package.

GND

1

2

3

5

4

VMON1

PGOOD

Vcc

VMON2

SOT-23-5 Top View

APL6535