3-Channel Power Supply Supervisor
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Feb., 2001
APW1680
www.anpec.com.tw1
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.
Features General Description
Applications
• PC Switching Power Supply
Ordering Information
• Over Voltage Protection and Lock Out for
! 3.3 V, 5 V, and 12 V
• Under Voltage Protection and Lock Out for
! 3.3 V and 5 V
• Fault Protection Output with Open Drain
! Output Stage
• Open Drain Power Good Output Signal for
! Power Good Input, 3.3 V and 5 V
• 300 ms Power Good Delay
• 2.36ms PSON Control to FPO Turn Off Delay
• 38 ms Control Debounce
• 75 ms Delay for 3.3V and 5V Under Voltage
! Protection
• 73 µs Width Noise Deglitches
• Wide Power Supply Voltage Range
from 4 V to 15 V Pin Description
PGI
GND
PGO
VCC
VS5
VS33
1
2
3
4
8
7
6
5
FPO
PSON
The APW1680 is designed to minimize the exter-
nal components of personal-computer switching
power supply systems. It provides protection
circuits, power good indicator, fault protection out-
put FPO and control.
OVP (over voltage protection) monitors 3.3V, 5 V,
and 12 V (12 V OV detects via V
CC
terminal). UVP
(under voltage protection) monitors 3.3V and 5V.
When an OV or UV condition is detected, the PGO
(power good output) is set to low and FPO is latched
to high.
PSON
from low to high resets the protec-
tion latch.
Power good feature monitors PGI, 3.3V and 5V un-
der voltages, and issues a power good signal when
they are ready.
APW1680
Package Code
J : DIP - 8
Temp. Range
C : 0 to 70 C
Handling Code
TU : Tube
°
Handling Code
Temp. Range
Package Code