TPS65163
www.ti.com
SLVSA28 –OCTOBER 2009
VIN
VIN
SWB
SWB
Current Sampling
&
Slope Compensation
Bootstrap
Capacitor
V
L
OVP Pull-Up
Resistor
+
-
Control
Logic
1.24V
+
-
Current
Comparator
FBB
Error
Amplifier
Current Limit
&
Soft-Start
Overvoltage
Comparator
+
-
1.24V+15%
1.24V-3%
Power Good
Comparator
+
-
To Reset Block
+
-
Clock/2
Clock/4
0.8V
0.4V
+
-
Control
Logic
750kHz
Oscillator
Clock Selection for Short-Circuit and Soft-Start
Figure 40. Buck Converter Internal Block Diagram
FBB
VIN
VLOGIC
VIN
SWB
Figure 41. Buck Converter Application Circuit
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