TSM112
3.3V 5V 12V HOUSEKEEPING IC
■ OVER VOLTAGE PROTECTION FOR 3.3V
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5V AND 12V WITHOUT EXTERNAL COMPONENTS
UNDER VOLTAGE PROTECTION FOR 3.3V
5V AND 12V WITHOUT EXTERNAL COMPONENTS
OVER VOLTAGE PROTECTION FOR -12V
OR -5V WITH EXTERNAL COMPONENTS
EXTERNALLY ADJUSTABLE UNDER VOLTAGE BLANKING DURING POWER UP
POWER GOOD INPUT/OUTPUT
EXTERNALLY ADJUSTABLE PG DELAY
FAULT OUTPUT
REMOTE OUTPUT
EXTERNALLY ADJUSTABLE REMOTE
DELAY
PRECISION VOLTAGE REFERENCE
2kV ESD PROTECTION
DESCRIPTION
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■ PC SMPS Triple Power Line Housekeeping
IC (3.3V 5V 12V)
ORDER CODE
Part
Number
Temperature
Range
TSM112CN
TSM112CD
0 to 85°C
0 to 85°C
Package
Marking
N
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SO14
(Plastic Micropackage)
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PIN CONNECTIONS (top view)
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APPLICATION
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DIP14
(Plastic Package)
-O
The TSM112 integrated circuit incorporates all
sensing circuitry to regulate and protect from over
voltage and under voltage a multiple output power
supply (3.3V, 5V and 12V).
TSM112 incorporates all the necessary functions
for Housekeeping features which allow safe operation in all conditions, and very high system integration.
TSM112 integrates a precise voltage reference.
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VS33
1
14
VCC
VS5
2
13
FAULT
VS12
3
12
PG
EP
4
11
TPG
PI
5
10
TREM
TUV
6
9
REM
GND
7
8
VREF
D
•
•
TSM112C
M112
N = Dual in Line Package (DIP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
January 2001
1/7
TSM112
PIN DESCRIPTION
Name
Pin #
Type
Function
Vcc
Gnd
Vs12
14
7
3
Power Supply
Power Supply
Analog Input
Over and Under voltage Sense Input Dedicated to the 12V Line1)
Vs5
2
Analog Input
Over and Under voltage Sense Input Dedicated to the 5V Line1)
Vs33
1
Analog Input
Positive Power Supply Line
Ground Line. 0V Reference For All Voltages
Over and Under voltage Sense Input Dedicated to the 3.3V Line1)
Tuv
6
Timing Capacitor
Adjustable Under voltage Blanking Delay at Power Up (Setting Capacitor)
Fault
13
Open Collector
Fault Output. Fault is high when Over or Under Voltage has been Detected
PI
5
Analog Input
Power Good Input. Detection of the Power Conditions
PG
12
Open Collector
Power Good Output. PG output is High when the Power Conditions are
OK
Tpg
11
Timing Capacitor
Adjustable Power Good Delay (Setting Capacitor)
REM
9
Logic Input
Input Remote Control of the Complete System by the Motherboard
(µController). Remote is active high. Switch OFF/ON of the Power Supply.
Reset of the Complete System after a FAULT Activation.
Trem
10
Timing Capacitor
Adjustable Remote Delay (Setting Capacitor).
Vref
8
Voltage Reference 2.5V Reference for all Voltages
EP
4
Analog Input
Extra Protection Circuit. Can be used for -12V or -5V Over Voltage
Protection.
1. Over and Under Voltage Inputs can go higher than Vcc within the allowed Max Rating range
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ABSOLUTE MAXIMUM RATINGS
Symbol
Vcc
Iout
Io
VFault
Top
Pd
Tstg
ESD
Tuv
EP
PI
PG
Tpg
REM
Trem
-O
DC Supply Voltage
)
s
(
ct
DC Supply Voltage 1)
Output Current Power Good
Output current for the Voltage reference
Fault Ouput
Operating Free Air Temperature Range
Power Dissipation
Storage Temperature
Electrostatic Discharge
Adjustable Under voltage Blanking At Power UP
Extra Protection
Power Good Input
Power Good Output
Adjustable Power Good Delay
Remote Control
Adjustable Remote Delay
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Value
Unit
25
V
30
20
5
-55 to 125
0.7
-55 to 150
2
5
5
5
5
5
5
5
mA
mA
V
°C
W
°C
kV
V
V
V
V
V
V
V
Value
Unit
4.5 to 24
0 to 85
V
°C
1. All voltage values, except differential voltage are with respect to network ground terminal.
OPERATING CONDITIONS
Symbol
Vcc
Toper
2/7
Parameter
DC Supply Conditions
Operating Free Air Temperature Range
TSM112
ELECTRICAL CHARACTERISTICS
Tamb = 25°C and Vcc = 17V (unless otherwise
Symbol
Parameter
specified)
Test Condition
Min
Typ
Max
Unit
3
5
mA
3.8
4
4.2
V
5.8
6.1
6.4
V
13.4
14.2
15
V
2.1
3.7
9.2
2.3
4
10
1.28
100
2.5
4.3
10.8
300
500
Total Current Consumption
Icc
Total Supply Current
Over Voltage and Under Voltage Protection
Vov33
Over Voltage Sense 3.3V
Input can go higher than
Vcc
Input can go higher than
Vcc
Input can go higher than
Vcc
Vov5
Over Voltage Sense 5V
Vov12
Over Voltage Sense12V
Vuv33
Vuv5
Vuv12
Vep
Tfault
Under Voltage Sense 3.3V
Under Voltage Sense 5V
Under Voltage Sense 12V
Extra Over voltage Protection Threshold
Fault Delay Before Latching
Internally Fixed Delay
Tuv
Thuv
Under Voltage Blanking During Power
Up (Vcc rising)
Cuv = 2.2µF
Adjustable Blanking
eP
100
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Blanking Threshold
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Under Voltage Blanking During Power Up
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Vfaultol
Ifaultoh
Fault Output Saturation Voltage Level
Fault Output Leakage Current Level
Vremth
Vremih
Iremil
Trem1
Remote ON/OFF Input Voltage
Threshold
High Input Remote Voltage
Low Input Remote Saturation Current
Remote Adjustable Delay ON to OFF
Trem2
Remote Adjustable Delay OFF to ON
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1.28
1.28
70
Collector Current = 15mA
PG Output = 5V
-O
Load Capacitor = 100pF
Load Capacitor = 100pF
Load Capacitor Cpg=2.2µF
100
1
1
300
1.28
V
V
V
V
µs
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Power Good (PG)
Vpgth Power Good Voltage Threshold
Vpghyst Power Good Voltage Threshold
Hysteresis
Vpgol Low Output Open Collector Saturation
Voltage
Ipgoh
High Output Open Collector Leakage
Current
Tpgr
Power Good Output Rise Time
Tpgf
Power Good Output Fall Time
Tpg
Power Good Adjustable Delay
PIth
Power Input Detection Threshold
)
s
(
ms
V
V
mV
0.4
V
1
µA
500
µs
µs
ms
V
Fault
IFault = 1mA
Vfault = 5V
1
1
V
µA
Remote Control (REM)
Load Capacitor
Crem=0.1µF
Load Capacitor
Crem=0.1µF
0.7
0.8
3.3
3.4
1
V
V
mA
ms
40
50
0.5
60
40
50
60
ms
2.46
2.5
4
2.54
10
V
mV
Voltage Reference
Vref
Regline
Internal Voltage Reference
Line regulation
Regline
Line regulation
Regload Load regulation 1)
Io = 0mA
Io = 0mA
4.5V
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