TPS65281

TPS65281, TPS65281-1 www.ti.com SLVSBH7B – JULY 2012 – REVISED DECEMBER 2012 PRECISION ADJUSTABLE CURRENT LIMITED POWER DISTRIBUTION SWITCH WITH 4.5V TO 18V INPUT VOLTAGE, 3A OUTPUT CURRENT SYNCHRONOUS BUCK REGULATOR Check for Samples: TPS65281, TPS65281-1 FEATURES 1 INTEGRATED POWER DISTRIBUTION SWITCH Operating Input Voltage Range: 2.5 V to 6.5 V Adjustable Current Limit: 75 mA - 2.7 A (typical) ±6% Current-Limit Accuracy at 1.7 A (typical) Over Current Latch-Off Protection (TPS65281) and Over Current Auto-Recovery (TPS65281-1) Reverse Input-Output Voltage Protection Built-In Soft-Start Integrated Back-to-Back Power MOSFETs With 100-mΩ On-Resistance Over Temperature Protection xxx xxx xxx xxx xxx xxx xxx xxx xxx INTEGRATED BUCK CONVERTER Wide Input Voltage Range: 4.5 V to 18 V Maximum Continuous 3-A Output Current Feedback Reference Voltage: 0.8 V ±1 % Adjustable 300-kHz to 1.4-MHz Switching Frequency Adjustable Soft Start and Tracking With Built-In 1-ms Internal Soft-Start Time Cycle-by-Cycle Current Limit Output Over-voltage Protection 16-Lead QFN (RGV) 4-mm x 4-mm Package APPLICATIONS USB Ports and Hubs Digital TV Set-Top Boxes VOIP Phones Tablet PC DESCRIPTION/ORDERING INFORMATION The TPS65281/TPS65281-1 incorporates an N-channel back-to-back power MOSFET switch and a monolithic buck converter. The device is intended to provide a total power distribution solution for digital TV, set-top boxes, tablet PC and VOIP phones etc...