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FEATURES

Wide Input Voltage Range: 4.5-V to 28-V

Selectable Dual and DDR Modes

Selectable Fixed Frequency Voltage Mode

Advanced Power Good Logic Monitors both

Channels

Selectable Autoskip Mode

Integrated Boot Strap Diodes

180° Phase Shift Between Channels

Integrated 5-V, 60-mA Regulator

Input Feedforward Control

1% Internal 0.85-V Reference

RDS(on) Overcurrent Detection (4200 ppm/°C)

Integrated OVP, UVP and Power Good Timers

30-pin TSSOP Package

APPLICATIONS

Notebook Computers System Bus and I/O

DDR I or DDR II Termination

DESCRIPTION

The TPS51020 is a multi-function dualsynchronous

step-down controller for notebook

system power. The part is specifically designed

for high performance, high efficiency applications

where the loss associated with a current sense

resistor is unacceptable. The TPS51020 utilizes

feed forward voltage mode control to attain high

efficiency without sacrificing line response.

Efficiency at light load conditions can be

maintained high as well by incorporating autoskip

operation. A selectable, Suspend to RAM (STR)

supported, DDR option provides a one chip

solution for all switching applications from

5-V/3.3-V supply to a complete DDR termination

solution.