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TPS54810
SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005
www.ti.com
6
FUNCTIONAL BLOCK DIAGRAM
Falling
Edge
Deglitch
Enable
Comparator
1.2 V
VIN
3.8 V
Hysteresis: 0.03 V
2.5 µs
Falling
and
Rising
Edge
Deglitch
2.5 µs
VIN UVLO
Comparator
Hysteresis: 0.16 V
Internal/External
Slow-Start
(Internal Slow-Start Time = 3.35 ms)
Reference
VREF = 0.891 V
−
+
Error
Amplifier
Thermal
Shutdown
150°C
SHUTDOWN
SS_DIS
PWM
Comparator
OSC
Leading
Edge
Blanking
100 ns
RQ
S
Adaptive Dead-Time
and
Control Logic
SHUTDOWN
30 mΩ
VIN
REG
VBIAS
VIN
BOOT
VIN
PH
C
O
PGND
PWRGD
Falling
Edge
Deglitch
35 µs
VSENSE
SHUTDOWN
0.90 V
ref
Hysteresis: 0.03 Vref
Powergood
Comparator
AGND
VBIAS
ILIM
Comparator
3 − 6 V
V
O
SYNC
RTCOMPVSENSE
SS/ENA
TPS54810
30 mΩ
L
OUT
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