Datasheet

TPS54380
SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005
www.ti.com
6
INTERNAL BLOCK DIAGRAM
Falling
Edge
Deglitch
Enable
Comparator
1.2 V
2.95 V
Hysteresis: 0.03 V
2.5 µs
Falling
and
Rising
Edge
Deglitch
2.5 µs
VIN UVLO
Comparator
Hysteresis: 0.16 V
Multiplexer
Reference
−
+
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
60 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
Power-Good
Comparator
AGND
VBIAS
ILIM
Comparator
Core
RTCOMPVSENSE
ENA
TPS54380
60 mΩ
L
OUT
TRACKIN
25-ns Adaptive
Dead-Time
Sense FET
VIN
I/O