APL6536 Datasheet, PDF (1/13 Pages) Anpec Electronics Coropration – Four-Channel Supervisory IC

APL6536
Four-Channel Supervisory IC
Features
General Description
• 2.6V to 5.5V Input Voltage Range
• Low Quiescent Current : less than 50µA
• High Accuracy Detection Threshold : ±1.6%
• Adjustable Undervoltage Lockout for Each
Supply
• Active high PGOOD Output
• Guaranteed PGOOD Valid to Falling VCC < 1V
• VMON Glitch Immunity : 30µs
• Lead Free Available (RoHS Compliant)
Applications
• Graphics Cards
• Portable Battery-Powered Equipment
• µP Voltage Monitoring
• Set-Top Boxes
• Notebook Computer
• Multiple Supply System
Pinouts
The APL6536 is a four channel supervisory IC de-
signed to monitor voltage supplies in µP 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
output is pulled low, the hysteresis of the internal ref-
erence is 15mV. The PGOOD pin has an internal
20kΩ pull-up to VCC making an external pull-up resis-
tor unnecessary. Each rail’s VMON point is indepen-
dently 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 tran-
sient glitches 30µs on VMON input. The PGOOD out-
put is an open-drain to allow ORing of multiple signals.
If less than four voltages are being monitored, connect
the unused VMON pins to VCC. The ENABLE input
pin provides for a reset of the PGOOD output when it
is pulled down below 0.5V. With an internal 10µA
pull-up to VCC, it can be signaled with common logic or
pulled to ground with a push button switch. APL6536
come in a miniature SOP-8 package.
SOP-8 Top View
Vcc
1
8
PGOOD
2
7
ENABLE
3
6
GND
4
5
APL6536
VMON1
VMON2
VMON3
VMON4
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. Rev.
1
A.4 - Mar., 2005
www.anpec.com.tw
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