TPS5402DR Datasheet PDF - TI

●DESCRIPTION

●The TPS5402 is a monolithic non-synchronous buck regulator with wide operating input voltage range from 3.5 V to 28 V. Current mode control with internal slope compensation is implemented to reduce component count. TPS5402 also features a light load pulse skipping mode, which allows for a power loss reduction from the input power supply to the system at light loading.

●The switching frequency of the converters can be set from 50 kHz to 1.1 MHz with an external resistor. Frequency spread spectrum operation is introduced for EMI reduction.

●A cycle-by-cycle current limit with frequency fold back protects the IC at over loading condition.

●FEATURES

●• 3.5-V to 28-V Wide Input Voltage Range

●• Up to 1.7-A Maximum Continuous Output Loading Current

●• Pulse Skipping Mode to Achieve High Light Load Efficiency

●• High Light Load Efficiency

●• Frequency Spread Spectrum to Reduce EMI

●• Adjustable 50-kHz to 1.1-MHz Switching

●   Frequency Set by an External Resistor

●   (Leave pin ROSC floating. Set frequency to

●   120 kHz and ground connection to 70 kHz)

●• Frequency Spread Spectrum to Ease EMI Issue

●• Peak Current-Mode Control

●• Cycle-by-Cycle Over Current Protection

●• External Soft Start

●• Available in SOIC8 Package

●APPLICATIONS

●• 5-V, 9-V, 12-V and 24-V Distributed Power Systems

●• Consumer Applications Such as Home Appliances, Set-Top Boxes, CPE Equipment, LCD Displays, Peripherals, and Battery Chargers

●• Industrial and Car Entertainment Power Supplies