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1FEATURES

23? Qualified for Automotive Applications

? D-CAP2? Mode Enables Fast Transient

Response

? Low Output Ripple and Allows Ceramic Output

Capacitor

? Wide VCC Input Voltage Range: 4.5 V to 18 V

? Wide VIN Input Voltage Range: 2 V to 18 V

? Output Voltage Range: 0.76 V to 5.5 V

? Highly Efficient Integrated FET’s Optimized

for Lower Duty Cycle Applications

- 160 mΩ (High Side) and 110 mΩ (Low Side)

? High Efficiency, less than 10 μA at shutdown

? High Initial Bandgap Reference Accuracy

? Adjustable Soft Start

? Pre-Biased Soft Start

? 700-kHz Switching Frequency (fSW)

? Cycle-By-Cycle Overcurrent Limit

? Power Good Output

APPLICATIONS

? Wide Range of Applications for Low Voltage

System

– Digital TV Power Supply

– High Definition Blu-ray Disc? Players

– Networking Home Terminal

– Digital Set Top Box (STB)

DESCRIPTION

The TPS54225-Q1 is an adaptive on-time D-CAP2?

mode synchronous buck converter. The

TPS54225-Q1 enables system designers to complete

the suite of various end equipment’s power bus regulators with a cost effective, low component count,

low standby current solution. The main control loop

for the TPS54225-Q1 uses the D-CAP2? mode

control which provides a fast transient response with

no external compensation components.

The TPS54225-Q1 also has a proprietary circuit that

enables the device to adapt to both low equivalent

series resistance (ESR) output capacitors, such as

POSCAP or SP-CAP, and ultra-low ESR ceramic

capacitors. The device operates from 4.5-V to 18-V VCC input , and from 2-V to 18-V VIN input power

supply voltage. The output voltage can be

programmed between 0.76 V and 5.5 V. The device

also features an adjustable slow start time and a

power good function. The TPS54225-Q1 is available

in the 14 pin HTSSOP package, and designed to

operate from –40°C to 85°C.