TPS5402 Datasheet | Texas Instruments

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-k Hz to 1.1-MHz Switching Frequency Set by an External Resistor (Leave pin ROSC floating. Set frequency to 120 k Hz and ground connection to 70 k Hz) - 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 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 pensation is implemented to reduce ponent 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 k Hz 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. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2012, Texas Instruments Incorporated SLVSBK4 -...