TPS51117 Datasheet PDF

●DESCRIPTION

●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 RDS(on) 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)