adm1203 Analog Devices, Inc., adm1203 Datasheet - Page 7

• Manufacturer Part Number: adm1203
• Description: Simple Tracker? With Circuit Breaker
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
PIN CONFIGURATIONS
PIN FUNCTIONAL DESCRIPTIONS
Pin No.
1
2
3
4
5
6
7
8
UP / DOWN
TIMER
GND
Name
TIMER
GND
UP/DOWNb or UP/STOPb
VOUT
CSLEW
GATE
RS-
VCC
V
OUT
1
2
3
4
ADM1203-1AUJ
(Not to Scale)
TOP VIEW
Description
Timer Input Pin. An external capacitor C
21.7ms/µF circuit breaker delay. The GATE pin turns off whenever the TIMER pin is pulled
beyond the upper threshold, such as for overvoltage detection with an external zener.
Chip Ground Pin.
Logic Pin. Drive high to initiate track up off all ADM1203 controlled rails. Drive low to
initiate track down of all rails (ADM1203-1) or a fast shutdown of all rails (ADM1203-2).
Monitors the Source of the external FET
Connect to an external capacitor to control the slew rate of the of the GATE at turn on
(and turn-off for ADM1203-1).
Drives the GATE node of the external FET
Current Limit Sense Input Pin. A sense resistor between the Vcc and RS- pins sets the
analog current limit. In overload, the EA controls the external FET gate to maintain the
SENSE voltage at 47mV. When the EA is maintaining current limit, the TIMER circuit
breaker mode is activated. The current limit loop/circuit breaker mode can be disabled
by connecting the Vcc pin and RS- pin together..
Chip Power Supply, 2.7V to 16.5V.
8
7
6
5
C
GATE
V
RS-
Rev. PrD | Page 7 of 8
SLEW
CC
UP / STOP
TIMER
GND
V
OUT
1
2
4
3
TIMER
ADM1203-2AUJ
(Not to Scale)
sets a 272.9ms/µF initial timing delay and a
TOP VIEW
8
7
6
5
C
RS-
GATE
V
SLEW
CC
ADM1203