TSM1121IN Datasheet TSM1121ID, TSM1121IN | P1-P3

Revision A 1/11

■ Over voltage protection for 3.3V 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

The TSM1121 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).

TSM1121 incorporates all the necessary functions

for Housekeeping features which allow safe

operation in all conditions, and very high system

integration.

TSM1121 integrates a precise voltage reference.

APPLICATION

■ PC SMPS triple power line housekeeping ic

(3.3V 5V 12V)

ORDER CODE

Note: N = Dual in Line Package (DIP)

D = Small Outline Package (SO) - also available in Tape &

Reel (DT)

PIN CONNECTIONS (top view)

Part

Number

Temperatur

e Range

Package

Marking

TSM1121CN 0 to 85°C

•

TSM1121C

TSM1121CD 0 to 85°C

•

M1121

DIP14

(Plastic Package)

SO14

(Plastic Micropackage)

VCC

REM

TREM

TPG

VS33

VS5

VS12

TUV

GND VREF

FAUL

TSM1121

3.3V 5V 12V HOUSEKEEPING IC

May 2003

Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)

Obsolete Product(s) - Obsolete Product(s)

Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)

TSM1121 Pin Description

2/11

1 PIN DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

OPERATING CONDITIONS

Name Pin # Type Function

Vcc 14 Power Supply Positive Power Supply Line

Gnd 7 Power Supply Ground Line. 0V Reference For All Voltages

Vs12 3

Analog Input

Over and Under voltage Sense Input Dedicated to the 12V Line

1) Over and Under Voltage Inputs can go higher than Vcc within the allowed Max Rating range

Vs5 2

Analog Input

Over and Under voltage Sense Input Dedicated to the 5V Line

Vs33 1

Analog Input

Over and Under voltage Sense Input Dedicated to the 3.3V Line

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

Tpg 11 Timing Capacitor Adjustable Power Good Delay (Setting Capacitor)

REM 9

Logic Input Input Remote Control of the Complete System by the Motherboard (

Con-

troller). 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 Protec-

tion.

Symbol DC Supply Voltage Value Unit

Vcc

DC Supply Voltage

25 V

Iout Output Current Power Good 30 mA

Io Output current for the Voltage reference 20 mA

VFault Fault Ouput 5 V

Pd Power Dissipation 0.7 W

Tstg Storage Temperature -55 to 150 °C

ESD Electrostatic Discharge 2 kV

Tuv Adjustable Under voltage Blanking At Power UP 5 V

EP Extra Protection 5 V

PI Power Good Input 5 V

PG Power Good Output 5 V

Tpg Adjustable Power Good Delay 5 V

REM Remote Control 5 V

Trem Adjustable Remote Delay 5 V

1) All voltage values, except differential voltage are with respect to network ground terminal.

Symbol Parameter Value Unit

Vcc DC Supply Conditions 4.5 to 24 V

Toper Operating Free Air Temperature Range 0 to 85 °C

Obsolete Product(s) - Obsolete Product(s)

Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)

Electrical Characteristics TSM1121

3/11

2 ELECTRICAL CHARACTERISTICS

Tamb = 25°C and Vcc = 17V (unless otherwise specified)

Symbol Parameter Test Condition Min Typ Max Unit

Total Current Consumption

Icc Total Supply Current 3 5 mA

Over Voltage and Under Voltage Protection

Vov33

Over Voltage Sense 3.3V Input can go higher than

Vcc

3.8 4 4.2 V

Vov5

Over Voltage Sense 5V Input can go higher than

Vcc

5.8 6.1 6.4 V

Vov12

Over Voltage Sense12V Input can go higher than

Vcc

13.4 14.2 15 V

Vuv33 Under Voltage Sense 3.3V 2.1 2.3 2.5 V

Vuv5 Under Voltage Sense 5V 3.7 4 4.3 V

Vuv12 Under Voltage Sense 12V 9.2 10 10.8 V

Vep Extra Over voltage Protection Threshold 1.28 V

Tfault Fault Delay Before Latching Internally Fixed Delay 100

Under Voltage Blanking During Power Up

Tuv

Under Voltage Blanking During Power

Up (Vcc rising)

Cuv = 2.2

Adjustable Blanking

100 300 500 ms

Thuv Blanking Threshold 1.28 V

Power Good (PG)

Vpgth Power Good Voltage Threshold 1.28 V

Vpghyst

Power Good Voltage Threshold Hyster-

esis

70 mV

Vpgol

Low Output Open Collector Saturation

Voltage

Collector Current = 15mA

0.4 V

Ipgoh

High Output Open Collector Leakage

Current

PG Output = 5V

Tpgr Power Good Output Rise Time Load Capacitor = 100pF 1

Tpgf Power Good Output Fall Time Load Capacitor = 100pF 1

Tpg Power Good Adjustable Delay Load Capacitor Cpg=2.2

F 100 300 500 ms

PIth Power Input Detection Threshold 1.28 V

Fault

Vfaultol Fault Output Saturation Voltage Level IFault = 1mA 1 V

Ifaultoh Fault Output Leakage Current Level Vfault = 5V 1 µA

Remote Control (REM)

Vremth

Remote ON/OFF Input Voltage Thresh-

old

0.7 0.8 1 V

Vremih High Input Remote Voltage 3.3 3.4 V

Iremil Low Input Remote Saturation Current 0.5 mA

Trem1

Remote Adjustable Delay ON to OFF Load Capacitor

Crem=0.1

40 50 60 ms

Trem2

Remote Adjustable Delay OFF to ON Load Capacitor

Crem=0.1

40 50 60 ms

Voltage Reference

Vref Internal Voltage Reference Io = 0mA 2.46 2.5 2.54 V

Regline

Line regulation Io = 0mA

4.5V<Vcc<24V

410mV

Regline

Line regulation Io = 10mA

4.5V<Vcc<24V

15 mV

Regload

Load regulation

1) Do not short circuit the Vref Pin

0<Io<10mA

25 mV

Obsolete Product(s) - Obsolete Product(s)

P1-P3 P4-P6 P7-P9 P10-P11

TSM1121IN

Mfr. #:

Buy TSM1121IN

Manufacturer:

STMicroelectronics

Description:

IC HOUSEKEEPING 3.3/5/12V 14-DIP

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

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TSM1121IN

TSM1121IN

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