Datasheet

Current
Control
SoftStart
500kHz/
750kHz
Oscillator
D
S
VFB
1.154V
Comparator
GM Amplifier
Sawtooth
Generator
VFB
1.154
Vref
1.2 13 V
Bias
Vref=1.213V
Thermal
Shutdown
Sequencing
AVIN SW SW
GND
PGND
PGND
Q1
Negative
ChargePump
OS
GM Amplifier
LowGain
CurrentLimit
and
SoftStart
D
S
Q2
I
DLY
Vref
DLY1
OS
OS
AVIN
FREQ
Clock
SUP
DRP
Q3
Positive
ChargePump
Current
Control
SoftStart
I
DRVP
COMP
FB
I
DLY
AVIN
Vref
SS
I
DRVN
SS
SS
D
S
VINB
VINB
Regulator
8V
Sawtooth
Generator
Compensation
and
SoftStart
Vref
Logic
Clock
Clock/2
Clock/4
0.9V
0.6V
ClockSelectDuringShortCircuit
andSoftStart
ControlLogic
Ref
CurrentLimit
SWB
BOOT
FBB
Error Amplifier
SUP
DRN
FBN
Vref
1.2 13 V
Reference
Output
REF
DLY1
Vref
DLY2
DLY2
Step-Down
Converter
Q5
Q4
D
S
GD
EN1
EN2
NC
Clock
DLY1
DLY2
Vref
Overvoltage
Comparator
ControlLogic
I
DLY
FBP
AVIN
TPS65161
TPS65161A, TPS65161B
www.ti.com SLVS617E –APRIL 2006–REVISED MARCH 2013
TYPICAL CHARACTERISTICS (continued)
FUNCTIONAL BLOCK DIAGRAM
Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Links: TPS65161 TPS65161A TPS65161B