TPS51275_17 Datasheet, PDF (9/31 Pages) Texas Instruments – Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs

www.ti.com
SWITCHER CONTROLLER BLOCK DIAGRAM
TPS51275
TPS51275B
TPS51275C
V_REF –40%
+
UV
VFB
REF
SKIP
VIN
V_REF +15%
SS Ramp Comp
+
OV
PWM
+
+
Control Logic
10 µA
CS
+
GND
OC
+
NOC
+
+
ZC
Discharge
PGOOD
TPS51275, TPS51275B, TPS51275C
SLUSB45B – JUNE 2012 – REVISED MARCH 2013
+
V_REF +5%/10%
+
V_REF –5%/10%
HS
XCON
LS
One-Shot
VDD
EN
VO _OK
VBST
DRVH
SW
VDRV
DRVL
PGND
DCHG
PGOOD
FAULT
UDG-12093
Copyright © 2012–2013, Texas Instruments Incorporated
Submit Documentation Feedback
9