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TPS54428DDAR
Vout(50mV/div)TPS54428DDA
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SLVSB42D –NOVEMBER
TPS54428 4.5-Vto 18-V Input, 4-A Synchronous Step-Down Converter Features Highly Efficient Integrated FETs Optimized
for Lower Duty Cycle Applications70 mΩ (High Side) and53 mΩ (Low Side) High Efficiency, Less Than 10 μAat Shutdown High Initial Bandgap Reference Accuracy Adjustable Soft Start Pre-Biased Soft Start 650-kHz Switching Frequency (fSW) CycleBy Cycle Over Current Limit Auto-Skip Eco-mode™ for High Efficiencyat Light
Load
Applications Wide Rangeof Applications for Low Voltage
System Digital TV Power Supply High Definition Blu-ray Disc™ Players Networking Home Terminal Digital Set Top Box (STB)
DescriptionThe TPS54428is an adaptive on-time D-CAP2™
mode synchronous buck converter.
The TPS54428 enables
complete the suiteof
components.
The adaptive on-time
transition between PWM
conditions and Eco-mode™
Eco-mode™ allows the
efficiency during lighter
The TPS54428 also
enables the deviceto
series resistance (ESR)
POSCAP or SP-CAP,
capacitors. The device
VIN input.
The output voltage can
0.76V and 7.0V.
The device also features
(1) Forall available packages, see theat
the endofthe data sheet.
Simplified Schematic 1.05-V Load Transient
