TPS65281RGVR

精密可调电流限制的电源分布开关4.5V至18V的输入电压， 3A输出电流同步降压稳压器 PRECISION ADJUSTABLE CURRENT LIMITED POWER DISTRIBUTION SWITCH WITH 4.5V TO 18V INPUT VOLTAGE, 3A OUTPUT CURRENT SYNCHRONOUS BUCK REGULATOR

DESCRIPON/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 applications, where precision current limiting is required or heavy capacitive load or short circuit are encountered.

FEATURES

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

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