TPS51117RGYT

单同步降压控制器 SINGLE SYNCHRONOUS STEP-DOWN CONTROLLER

DESCRIPON

The TPS51117 is a cost effective, synchronous buck controller for POL voltage regulation in notebook PC applications. The controller is dedicated for Adaptive On-Time D-CAP™ Mode operation that provides ease of use, low external component count, and fast transient response. Auto-skip mode for high efficiency down to the milli-ampere load range, or PWM-only mode for low noise operation is selectable.

FEATURES

• High Efficiency, Low Power Consumption, 4.5-μA Typical Shutdown Current

• Fixed Frequency Emulated On-Time Control, Adjustable from 100 kHz to 550 kHz

• D-CAP™ Mode with 100-ns Load Step Response

• < 1% Initial Reference Accuracy

• Output Voltage Range: 0.75 V to 5.5 V

• Wide Input Voltage Range: 1.8 V to 28 V

• Selectable Auto-Skip/PWM-Only Operation

• Temperature Compensated 4500 ppm/°C

  Low-Side RDSon Overcurrent Sensing

• Negative Overcurrent Limit

• Integrated Boost Diode

• Integrated OVP/UVP and Thermal Shutdown

• Power-Good Signal

• Internal 1.2-ms Voltage Softstart

• Integrated Output Discharge Softstop