TSM108
AUTOMOTIVE SWITCH MODE
VOLTAGE AND CURRENT CONTROLLER
s
CURRENT MEASUREMENT ON OUTPUT
s
s
s
s
s
s
s
s
s
s
POSITIVE LINE
CONSTANT VOLTAGE MODE CONTROL
CONSTANT CURRENT MODE CONTROL
PRECISION VOLTAGE AND CURRENT
CONTROL LOOPS
ADJUSTABLE SWITCHING FREQUENCY
ADJUSTABLE OVER VOLTAGE LOCKOUT
ADJUSTABLE UNDER VOLTAGE LOCKOUT
STANDBY MODE (LOW QUIESCENT
CURRENT)
SUSTAINS 60V
MINIMAL EXTERNAL COMPONENTS
COUNT
DRIVING ABILITY FOR EITHER P-MOSFET
OR PNP TRANSISTORS
APPLICATION DIAGRAM
MOSFET P
or PNP
DC INPUT
BATTERY
TSM108
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.
D
SO14
(Plastic Micropackage)
ORDER CODE
Package
Part Number
TSM108I
Temperature Range
D
-40掳, +125掳C
鈥?/div>
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS
(top view)
VCC
!STBY
GND
UV
OV
G
OSC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
GD
VS
ICTRL
VCTRL
VREF
ICOMP
VCOMP
November 2001
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