TPS54972_12 Datasheet, PDF (6/19 Pages) Texas Instruments – 9-A OUTPUT, 3-V TO 4-V INPUT TRACKING/TERMINATION SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FETs

TPS54972
SLVS437B – AUGUST 2002 – REVISED AUGUST 2010
INTERNAL BLOCK DIAGRAM
ENA
VDDQ
REFIN
VSENSE
ENABLE
COMPARATOR
TPS54972
Vbias
SHUTDOWN
highin highdr ^UVLO
UVLO
REG
0.8 V
Falling
Edge
Delay
1-4 µs
/T_SHUT
Rising
Edge
Delay
SAMPLING
LOGIC
SHUTDOWN
VPHASE
Vilim
VIN UVLO
VIN ^COMPARATOR
BIAS UVLO
BG GOOD
Delay
Vin_uvlo
SHUTDOWN
MUX
Reference/DAC
PWM
ERROR COMPARATOR
AMPLIFIER
FAULT
Rising
Edge
Delay
ILIM
COMPARATOR
SHUTDOWN
highin ^highdr
RQ
DEADTIME
S
www.ti.com
BIAS
VIN
VIN
BOOT
PH
Lout ^VTTQ
CO
SHUTDOWN
PGND
AGND
OSC
Ct
Iset
FAULT
STATUS
RT
RELATED DC/DC PRODUCTS
• TPS54372
• TPS54672
• TPS54872
6
Submit Documentation Feedback
Copyright © 2002–2010, Texas Instruments Incorporated