Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 1 of 11 V 1.0
AAT1015
Details are subject to change without notice
3-CHANNEL PC POWER SUPPLY SUPERVISOR
FEATURES
3-Channel PC Power Supply Supervisor
Over Voltage Protection for 3.3V, 5V, 12V
Output
Under Voltage Protection for 3.3V, 5V
Output with 75 ms Enable Delay
Fault Protection Output with Open Drain
Output
Open Drain Power Good Output
300 ms Power Good Delay
2.3 ms
ONCTL to FPO Turn Off Delay
38 ms ONCTL Signal De-Bounce
73
s De-Bounce
Latch Function Controlled by ONCTL and
Protection Input.
PIN CONFIGURATION
GENERAL DESCRIPTION
The AAT1015 is a 3-channel PC switching power
supply supervisor that provides Over Voltage
Protection (OVP), Under Voltage Protection
(UVP), and Power Good Indicator to monitor and
control the output of the switching power supply
system.
In addition to the implemented remote function
from external signal, i.e., On/Off Control
( ONCTL ), over voltage fault protection and under
voltage fault protection can also be directly
triggered without external voltage divider.
AAT1015 also greatly reduce the PCB board
space for power supply system.
With a minimal number of external components,
the AAT1015 offers a simple and cost effective
solution.
1
2
3
4
5
6
7
8
PGI
GND
FPO
ONCTL
PGO
Vcc
V5
V33
TOP VIEW
(PDIP-8 PACKAGE)
Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 2 of 11 V 1.0
AAT1015
FPO (Fault Protection Output)
NORMAL="LOW", FAULT="HIGH"
FPO indicates the fault condition of either Over
Voltage or Under Voltage. When a fault state
occurs, the FPO would be latched high and
combined with a low PGO output.
PGO (Power Good Output)
NORMAL="HIGH", FAULT="LOW".
A Power Good signal will be issued with 300 ms
delay after 3.3V, 5V, 12V and PGI are ready.
Power Good Output should be low before the
output voltage is out of regulation at turn-off.
OVP and UVP (Over Voltage Protection and
Under Voltage Protection)
OVP monitors 3.3V, 5V, and 12V via
CC
V pin,
while UVP monitors 3.3V and 5V. OVP and
UVP levels are determined by internal voltage
dividers. The typical values are 3.9V, 6.1V,
13.8V for OVP and 2.2V, 3.5V for UVP,
respectively.
ONCTL (On/Off Control)
On/Off Control is used to reset the latched state of
FPO and to externally control the switching
power supply system with a 38 ms de-bounce time.
AAT1015 offers 2.3 ms delay time after de-bounce
to trigger FPO when ONCTL switches from
low to high
Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 3 of 11 V 1.0
AAT1015
PIN DESCRIPTION
Pin No Name
I/O
Description
1
PGI
I Power Good Input Signal
2 GND
Ground
3
FPO
O Inverted Fault Protection Output, Open Drain Output Stage
4
ONCTL
I ON/OFF Control Input
5
V33
I Over and Under Voltage Protection for 3.3V
6
V5
I Over and Under Voltage Protection for 5V
7
CC
V
I Supply Voltage and 12V Over Voltage Protection Input
8
PGO
O Power Good Output Signal; Open Drain Output Stage
ABSOLUTE MAXIMUM RATINGS
Characteristics Symbol
Value
Unit
Supply Voltage
CC
V
16 V
FPO Output Voltage
FPO
V
16 V
PGO Output Voltage
PGO
V
8 V
Supply Current
CC
I
1 mA
Operating Free-Air Temperature Range
C
T
20
-
to +85
o
C
Storage Temperature Range
storage
T
45
-
to +125
o
C
RECOMMENDED OPERATING CONDITIONS
Test
Condition
Min Typ
Max
Unit
Supply Voltage,
CC
V
4 15 V
Input Voltage,
I
V
ONCTL , V5,
V33, PGI
7 V
FPO
V
15 V
Output Voltage
PGO
V
7 V
FPO
I
30 mA
Output Sink Current,
O
I (Sink)
PGO
I
10 mA
Supply Voltage Rising Time,
r
t
See Note 1
1 ms
Note 1: V
CC
slew rate must be less than 14 V/ms.
Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 4 of 11 V 1.0
AAT1015
ELECTRICAL CHARACTERISTICS, V
CC
= 5 V (UNLESS OTHERWISE
SPECIFIED)
Over Voltage Protection and Under Voltage Protection
Parameter Test
Condition
Min
Typ
Max
Unit
V33
3.7
3.9 4.1
V5
5.7 6.1 6.5
Over Voltage
Threshold
V
CC
13.2 13.8 14.4
V
V33
2.0
2.2 2.4
V 5
3.3
3.5
3.7
Under-Voltage
Threshold
CC
V
3.8
V
PGO and FPO
Parameter Test
Condition
Min
Typ
Max
Unit
LKG
I
Leakage Current (PGO)
PGO = 5 V
5
A
OL
V Low Level Output Voltage
(PGO)
k
sin
I
= 10 mA
0.4 V
LKG
I
Leakage Current ( FPO ) V( FPO ) = 5 V
5
A
k
sin
I
= 10 mA
0.3
OL
V
Low Level Output Voltage
( FPO )
k
sin
I
= 30 mA
0.7
V
PGI and ONCTL
Parameter Test
Condition
Min
Typ
Max
Unit
Input Threshold Voltage (PGI)
1.10
1.15 1.20
V
Input Pull-Up Current ( ONCTL )
ONCTL = 0 V
150
A
High-Level Input Voltage
( ONCTL )
2.0 V
Low-Level Input Voltage ( ONCTL )
0.8
V
Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 5 of 11 V 1.0
AAT1015
ELECTRICAL CHARACTERISTICS, V
CC
= 5 V (UNLESS OTHERWISE
SPECIFIED)
Operating Current
Parameter Test
Condition
Min
Typ
Max
Unit
CC
I Supply Current
ONCTL = 5 V
1
mA
Switching Characteristics, V
CC
= 5V, T
op
= Full Range
Parameter Test
Condition
Min
Typ
Max
Unit
1
d
t PGO Delay Time
200 300 450 ms
2
d
t Under Voltage Protection
Delay Time
49 75 114
ms
3
d
t ONCTL Off to FPO Delay
1
b
t +1.1
1
b
t +2.3
1
b
t +4.4 ms
1
b
t ONCTL De-Bounce Time
24 38 57
ms
2
b
t Noise De-Bounce Time
47 73 110
s
PDF 
ZIP