Datasheet Texas Instruments TPS40197RGYT — 数据表

TPS40197
www.ti.com SLUS886A – NOVEMBER 2008 – REVISED JULY 2012 SYNCHRONOUS BUCK CONTROLLER WITH 4-BIT VID INTERFACE
FOR SMART-REFLEXв„ў DSPs
FEATURES CONTENTS 1 2 Input Voltage Range: 4.5 V to 14 V
4-Bit Dynamic VID-On-The-Fly Support
VID Programmable Output Voltage with
Programmable Transition Rate
Fixed Switching Frequency of 520 kHz
Selectable Low-Side (Three Settings) and
Fixed High-Side Thermally Compensated
Overcurrent Protection
Power Good Indicator
Internal 5-V Regulator
Voltage Mode Control
Internally Fixed 5.5-ms Soft-Start Time
Pre-Bias Output Safe
Thermal Shutdown at 140В°C
16-Pin QFN Package 2 Electrical Characteristics 4 Typical Characteristics 6 Device Information 10 Application Information 12 Design Example 18 Additional References 20 DESCRIPTION
The TPS40197 is a synchronous buck controller that
operates from 4.5 V to 14 V input supply nominally.
The controller implements voltage-mode control
architecture with the switching frequency fixed at
520 kHz. The higher switching frequency facilitates …