Advanced Analog Technology, Inc.
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, In c. –
January 07, 2004 1
AAT101
5
Preliminary and Provisional
3-CHANNEL PC POWER SUPPLY SUPERVISOR
FOR 3.3V, 5V AND 12V
Features
z 3-Channel PC Power Supply Supervisor with
Minimized External Components
z Over Voltage Protection for 3.3V / 5V / 12V
Output
z Under Voltage Protection for 3.3V / 5V
Output with 75 ms Enable Delay
z Fault Protection Output with Open Drain
Output
z Open Drain Power Good Output
z 300 ms Power Good Delay
z 2.3 ms ONCTL to FPO Turn Off Delay
z 38 ms ONCTL Signal De-bounce
z 73 µs De-bounce
z Latch Function Controlled by ONCTL and
Protection Input.
Pin Configuration
General Description
The AAT1015 is a 3-channel power supply
supervisor. It provides Over Voltage Protection
(OVP), Under Voltage Protection (UVP), and
Power Good Indicator to monitor and control the
output of the switching power supply sy stem.
Remote function from external signal, i.e., On/Off
Control (ONCTL ), is also implemented.
Over voltage fault protection and under voltage
fault protection can be directly triggered without
external voltage divider.
With a minimum number of external components,
the AAT1015 offers a simple and cost effective
solution. Meanwhile, it can greatly reduce the
PCB board space for power supply system.
*Spec is subject to change without notice in this document.
1
2
3
45
6
7
8
PGI
GND
FPO
ONCTL
PGO
Vcc
V5
V33
TOP VIEW
(PDIP-8 PACKAGE)
Advanced Analog Technology, Inc.
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, In c. –
January 07, 2004 2
AAT101
5
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 latched high and combined with a
low PGO output.
PGO (Power Good Output)
NORMAL=“HIGH”, FAULT=“LOW”.
The 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
OVP monitors 3.3V, 5V, and 12V (via Vcc pin)
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 i s used to reset the latched stat e 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.
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, In c. –
January 07, 2004 3
AAT101
5
Pin Description
Pin # 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 VCC 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 VCC 16 V
FPO output voltage VFPO 16 V
PGO output voltage VPGO 8 V
Supply Current ICC 1 mA
Operating free-air temperature range Top -25 ~ 85 oC
Storage temperature range Tstg -65 ~ 125 oC
Recommended Operating Conditions
Test
Condition Min Typ Max Unit
Supply voltage, VCC 4 15 V
Input voltage, VI ONCTL , V5,
V33, PGI 7 V
VFPO 15 V Output voltage VPGO 7 V
IFPO 30 mA Output sink current, I O (sink) IPGO 10 mA
Supply voltage rising time, tr See Note 1 1 ms
Note 1: VCC slew rate must be less than 14 V/ms.
Advanced Analog Technology, Inc.
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, In c. –
January 07, 2004 4
AAT101
5
Electrical Characteristics, VCC = 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 VCC 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 VCC 3.8
V
PGO and FPO Parameter Test Condition Min Typ Max Unit
ILKG Leakage current (PGO) PGO = 5 V 5 µA
VOL Low level output voltag e
(PGO) Isink = 10 mA 0.4 V
ILKG Leakage current (FPO) V( FPO) = 5 V 5 µA
Isink = 10 mA 0.3 VOL Low level output voltag e
(FPO) Isink = 30 mA 0.7 V
PGI and ONCTL
Parameter Test Condition Min Typ Max Unit
Input threshold voltage (PGI) 1.1 1.15 1.2 V
Input pull-up current (ONCTL ) ONCTL = 0 V 150 µA
High-level input voltage (ONCTL ) 2.0 V
L ow-level input voltage (ONCTL ) 0.8 V
Operating Current
Parameter Test Condition Min Typ Max Unit
ICC Supply current ONCTL = 5 V 1 mA
Switching Characteristics, VCC = 5V, Top = Full Range
Parameter Test Condition Min Typ Max Unit
td1 PGO delay time 200 300 450 ms
td2 Under Voltage Protection
dl ti
49 75 114 ms
td3 ONCTL off to FPO delay tb1+1.1 tb1+2.3 tb1+4.4 ms
tb1 ONCTL de-bounce time 24 38 57 ms
tb2 Noise de-bounce time 47 73 110 µs
Advanced Analog Technology, Inc.
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, In c. –
January 07, 2004 5
AAT101
5
Function B lock D iagram
Vref
Power on Reset
Reset
VINT
VIN T =3.58 V
UVLO
PGI
Vref 300 m s
Delay
CLR
POD
Vref
73 µs
Debounce
R
73 µs
Debounce
R
75 m s
Delay
Bandgap
Reference
VBG =1.28
ONCTL
150 uA
Vcc
38 m s
Debounce
Reset
POD
Oscillator
Reset
POD
POD2
2.3 m s
Delay
CLR
Vcc
GND
V33
V5
UV5
UV33
UV5 OV5
UV33 OV33
OV12
Vref
73 µs
Debounce
R
Vref
Vref
POD POD2
R
Reset R
S
OV12
OV5
OV33
Q
S
RQ
Q
FPO
Level
Shift
PGO
Level
Shift
R
Advanced Analog Technology, Inc.
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, In c. –
January 07, 2004 6
AAT101
5
Timing Chart
AAT1015
Vcc
Reset
R
ONCTL
S
Q
FPO
PGI
3.3 V
5 V
12 V
PGO td1 td1 td1
tb1 tb1
Protection Occur ONCTL
OFF ONCTL
ON
PG OFF delay
AC
OFF
td3
Advanced Analog Technology, Inc.
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, In c. –
January 07, 2004 7
AAT101
5
Package Dimension (Unit: Mil)
355
R40
7Typ.
654
10
R10Max
(4X)
554
100Typ.
37 4 10
35020
250 4
312 12
605
182Typ.
Typ.
15 Min.
310Max.
115Min.
