TPS51275_17 Datasheet, PDF (8/31 Pages) Texas Instruments – Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs

TPS51275, TPS51275B, TPS51275C
SLUSB45B – JUNE 2012 – REVISED MARCH 2013
FUNCTIONAL BLOCK DIAGRAM (TPS51275/B/C)
TPS51275
TPS51275B
TPS51275C
+
155°C/145°C
+
4.5 V/4.0 V
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VIN
VO 1
VREG 5
+
+
+
+
+
2V
Osc
VREG 3
VCLK
EN 1
VBST 1
DRVH 1
SW 1
DRVL 1
VFB1
CS 1
PGOOD
VDRV VIN VDD VO_OK
Switcher
Controller
(CH1)
EN
FAULT
REF
PGOOD
PGND GND DCHG
VDD VDRV VIN
EN
FAULT
REF
Switcher
Controller
(CH2)
PGOOD
DCHG GND PGND
EN 2
VBST 2
DRVH 2
SW 2
DRVL 2
VFB2
CS 2
GND
(Thermal Pad )
UDG-12092
8
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