Datasheet

0.02
0.025
0.03
0.035
0.04
0.045
0.05
0.055
-50 -25 0 25 50 75 100 125 150
T -JunctionTemperature-°C
J
HighSideRdson
V =3.3V
I
HighSideRdson
V =5V
I
LowSideRdson
V =3.3V
I
LowSideRdson
V =5V
I
RDSON-StaticDrain-SourceOn-StateResistance- W
450
460
470
480
490
500
510
520
530
540
550
f -SwitchingFrequency-kHz
s
-50 -25 0 25 50 75 100 125 150
T -JunctionTemperature-°C
J
RT =400k ,
V =3.3V
W
I
ERROR
AMPLIFIER
Boot
Charge
Boot
UVLO
UVLO
Current
Sense
Oscillator
withPLL
Frequency
Shift
Slope
Compensation
PWM
Comparator
Minimum
COMP Clamp
Maximum
Clamp
Voltage
Reference
Overload
Recovery
VSENSE
SS
COMP
RT/CLK
PH
BOOT
VIN
AGND
Thermal
Shutdown
EN
Enable
Comparator
Shutdown
Logic
Shutdown
Enable
Threshold
TPS54418RTEBlockDiagram
Logic
Shutdown
PWRGD
POWERPAD
GND
Logic
Shutdown
107%
93%
S
LogicandPWM
Latch
i
1
i
hys
TPS54418
SLVS946C –MAY 2009–REVISED JULY 2013 www.ti.com
FUNCTIONAL BLOCK DIAGRAM
TYPICAL CHARACTERISTICS CURVES
HIGH SIDE AND LOW SIDE Rdson vs TEMPERATURE FREQUENCY vs TEMPERATURE
Figure 1. Figure 2.
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