TPS51020

TPS51020 ą SLUS564C − JULY 2003 − REVISED OCTOBER 2008 DUAL, VOLTAGE MODE, DDR SELECTABLE, SYNCHRONOUS, STEPĆDOWN CONTROLLER FOR NOTEBOOK SYSTEM POWER FEATURES DESCRIPTION D Wide Input Voltage Range: 4.5-V to 28-V D Selectable Dual and DDR Modes D Selectable Fixed Frequency Voltage Mode D Advanced Power Good Logic Monitors both Channels D Selectable Autoskip Mode D Integrated Boot Strap Diodes D 180° Phase Shift Between Channels D Integrated 5-V, 60-mA Regulator D Input Feedforward Control D 1% Internal 0.85-V Reference D RDS(on) Overcurrent Detection (4200 ppm/°C) D Integrated OVP, UVP and Power Good Timers D 30-pin TSSOP Package 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. ORDERING INFORMATION APPLICATIONS D Notebook Computers System Bus and I/O TA −40°C to 85°C D DDR I or DDR II Termination VIN SIMPLIFIED VO1 APPLICATION DIAGRAM VO1 VIN VO2 VREG5 VO2 1 INV1 TPS510...