Datasheet
DEVICE INFORMATION
Charge
Pump
Driver
UVLO
Current
Limit
Thermal
Sense
IN
GND
EN
ILIM
OUT
FAULT
CS
Reverse
Voltage
Comparator
-
+
Current
Sense
4-ms
Deglitch
8-msDeglitch
TPS2550
TPS2551
www.ti.com
........................................................................................................................................ SLVS736B – FEBRUARY 2008 – REVISED NOVEMBER 2008
Terminal Functions
TERMINAL
I/O DESCRIPTION
NAME TPS2550DBV TPS2551DBV TPS2550DRV TPS2551DRV
EN 3 – 4 – I Enable input, logic low turns on power switch
EN – 3 – 4 I Enable input, logic high turns on power switch
GND 2 2 5 5 Ground connection; should be connected
externally to POWER PAD
IN 1 1 6 6 I Input voltage; connect a 0.1 µ F or greater
ceramic capacitor from IN to GND as close to the
IC as possible.
FAULT 4 4 3 3 O Active-low open-drain output, asserted during
overcurrent, overtemperature, or reverse-voltage
conditions.
OUT 6 6 1 1 O Power-switch output
ILIM 5 5 2 2 I External resistor used to set current-limit
threshold; recommended 14.3 k Ω ≤ R
ILIM
≤ 80.6
k Ω .
Internally connected to GND; used to heat-sink
PowerPAD
– – PAD PAD the part to the circuit board traces. Should be
™
connected to GND pin.
FUNCTIONAL BLOCK DIAGRAM
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): TPS2550 TPS2551