Datasheet

Ref −30/10%
UV
OV
Ref +15%
Ref
758 mV
SSx
VFBx
TRIPx
10 µA
GND
LLx
PGNDx
LLx
VOx
LLx
PGNDx
LLx
ONx
ZC
OCP
PWM
Ref +5/10%
Ref −5/10%
Control Logic
1
Shot
On/Off Time
Minimum On/Off
Light Load,
OVP/UVP,
Discharge
Control
PGNDx
Delay
XCON
T ONSEL
Sdn
Fault
DRVLx
V5IN
V5IN
LLx
DRVHx
VBSTx
THOK
V5OK
PGNDx
PGOODx
V5IN
4 V/3.7 V
V5OK
THOK
BGR
V5FIL T
VO1
VBST1
DRVH1
LL1
DRVL1
PGND1
Switcher Controller
V5DRV
Ref
Fault
Sdn
ON1 SS1
ANALOG/SUB GND
EN/SS
Control
TRIP1
VFB1
PGOOD1
EN1 EN2
GND
PGOOD2
VFB2
TRIP2
SS2
ON2
Sdn
Fault
Ref
V5DRV
Switcher Controller
VO2
VBST2
DRVH2
LL2LL2
DRVL2
PGND2
1 V
T ONSEL
4 V
Frequency Control
FAST
SLOW
160 °C/
150 °C
MID
TPS51124
SLVS616B –NOVEMBER 2005–REVISED SEPTEMBER 2010 www.ti.com
FUNCTIONAL BLOCK DIAGRAM
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Product Folder Link(s): TPS51124