Datasheet

A
B
A
2B
V(DS)
Detector
Enable
Constant
Power
Engine
_
+
50mVmax
Charge
Pump
22 Am
GateControl
Amplifier
4V
Reference
14V
2mA
+
−
+
−
I(D)
Detector
_
+
9mS
Deglitch
Inrush
Complete
Power/Current
Amplifier
25 Am
Fault
Logic
_
+
4V
and
1V
2.5 Am
Timer
For AutoretryOptionwith
DutyCycleof0.75%
_
+
_
+
UVLO
Enable
POR
8.4Vand
8.3V
1.35Vand
1.25V
10
VCC
3
PROG
9
SENSE
1
EN
5
GND
4
TIMER
6
PG
7
OUT
8
GATE
2
VREF
2.7Vand
1.25V
Enable
TPS2490
TPS2491
SLVS503D –NOVEMBER 2003–REVISED JULY 2012 www.ti.com
FUNCTIONAL BLOCK DIAGRAM
PIN FUNCTIONS
PIN
I/O DESCRIPTION
NAME NO.
EN 1 I Device enable
VREF 2 O Reference voltage output, used to set power threshold on PROG pin
PROG 3 I Power-limit setting input
TIMER 4 I/O Fault timing capacitor
GND 5 Ground
PG 6 O Power good reporting output, open-drain
OUT 7 I Output voltage feedback
GATE 8 O Gate output
SENSE 9 I Current-limit sense input
VCC 10 I Supply input
8 Copyright © 2003–2012, Texas Instruments Incorporated