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.