TPS54311, TPS54312
TPS54313, TPS54314
TPS54315, TPS54316
SLVS416B − FEBRUARY 2002 − REVISED APRIL 2005
www.ti.com
FUNCTIONAL BLOCK DIAGRAM
VBIAS
AGND
VBIAS
VIN
Enable
Comparator
5 µA
SS/ENA
REG
Falling
Edge
Deglitch
SHUTDOWN
VIN
ILIM
Comparator
1.2 V
VIN
Thermal
Shutdown
145°C
Hysteresis: 0.03 V
Leading
Edge
Blanking
2.5 µs
VIN UVLO
Comparator
Falling
and
Rising
Edge
100 ns
VIN
BOOT
2.95 V
Deglitch
Hysteresis: 0.16 V
2.5 µs
SS_DIS
SHUTDOWN
L
OUT
V
O
PH
Internal/External
Slow-Start
(Internal Slow-Start Time =
3.3 ms to 6.6 ms)
+
−
C
O
Adaptive Dead-Time
and
Control Logic
R
S
Q
2 kΩ
PWM
Comparator
40 kΩ
Error
Amplifier
VIN
25 ns Adaptive
Deadtime
V
I
Feed-Forward
Compensation
V
I
OSC
PGND
Power good
Comparator
Reference/
DAC
Falling
Edge
PWRGD
VSENSE
0.90 V
ref
Deglitch
TPS5431x
Hysteresis: 0.03 Vref
SHUTDOWN
35 µs
FSEL
VSENSE
RT
6
TI [ TEXAS INSTRUMENTS ]
