DDR/DDR2 Termination Regulator 15A 4.5V to 28V 30-Pin TSSOP T/R

The TPS51020 is a multi-function dual-synchronousstep-down controller for notebooksystem power. The part is specifically designedfor high performance, high efficiency applicationswhere the loss associated with a current senseresistor is unacceptable. The TPS51020 utilizesfeed forward voltage mode control to attain highefficiency without sacrificing line response.Efficiency at light load conditions can bemaintained high as well by incorporating autoskipoperation. A selectable, Suspend to RAM (STR)supported, DDR option provides a one chipsolution for all switching applications from5-V/3.3-V supply to a complete DDR terminationsolution.

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

R_DS(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