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POSITIVE LINE

CONTROL LOOPS

CURRENT)

COUNT

OR PNP TRANSISTORS

DESCRIPTION

TSM108 is a P-channel MOSFET controller which

ensures constant voltage and constant current in

Switching Mode Power Supply (step down) like in

automotive battery charging applications.

TSM108 can easily be configured for very wide

voltage and current needs.

TSM108 is built in rugged BCD technology and

includes a PWM generator, Voltage and Current

control loops, a precision Voltage Reference, and

a P-Mosfet Gate Drive output. TSM108 can

sustain 60V on Vcc, and therefore meet the

standard

Load

Dump

requirements

in

the

Automotive field.

TSM108 includes security functions which lock the

PMosfet in OFF state: OVLO (Over Voltage

Lockout) and UVLO (Under Voltage Lockout). The

P-Mosfet Gate is also protected from over voltage

drive thanks to a 12V clamping protection circuit.

TSM108 includes a standby feature which allows

very low quiescent current when activated, as well

as safe P-Mosfet Off state.

TSM108

is

suitable

for

car

environment

accessories, as well as numerous other DC/DC

step down regulation.

APPLICATION DIAGRAM

ORDER CODE

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

PIN CONNECTIONS (top view)

Part Number

Temperature Range

Package

D

TSM108I

-40°, +125°C

•

MOSFET P

TSM108

or PNP

D

SO14

(Plastic Micropackage)

VCC

G

OV

UV

ICTRL

OSC

GND

VCOMP

VCTRL

ICOMP

VREF

VS

7

6

5

4

3

2

1

8

9

10

11

12

13

14

GD

!STBY

TSM108

AUTOMOTIVE SWITCH MODE

VOLTAGE AND CURRENT CONTROLLER

November 2001