TPS54311, TPS54312
TPS54313, TPS54314
TPS54315, TPS54316
SLVS416A – FEBRUARY 2002 – JULY 2003
www.ti.com
FUNCTIONAL BLOCK DIAGRAM
AGND
VIN
Enable
5
µA
Comparator
Falling
Edge
Deglitch
2.5
µs
SHUTDOWN
Thermal
Shutdown
145°C
VBIAS
SS/ENA
VBIAS
ILIM
Comparator
REG
VIN
VIN
1.2 V
Hysteresis: 0.03 V
VIN UVLO
Comparator
VIN
2.95 V
Hysteresis: 0.16 V
Leading
Edge
Blanking
100 ns
BOOT
Falling
and
Rising
Edge
Deglitch
2.5
µs
SS_DIS
SHUTDOWN
Internal/External
Slow-Start
(Internal Slow-Start Time =
3.3 ms to 6.6 ms)
PH
+
–
2 kΩ
40 kΩ
Error
Amplifier
PWM
Comparator
R Q
S
Adaptive Dead-Time
and
Control Logic
25 ns Adaptive
Deadtime
VIN
LOUT
CO
VO
VI
VI
Feed-Forward
Compensation
OSC
Power good
Comparator
VSENSE
0.90 Vref
Hysteresis: 0.03 Vref
Falling
Edge
Deglitch
SHUTDOWN
35
µs
PGND
Reference/
DAC
PWRGD
TPS5431x
VSENSE
RT
FSEL
6