Split-Rail Converter with Dual Positive and Negative Outputs (200mA typ)

The TPS65130/1 is dual-output dc-dc converter generating a positive output voltage up to 15 V and a negative output voltage down to –15 V with output currents in a 200 mA range in typical applications, depending on input voltage to output voltage ratio. 

With a total efficiency up to 85% the device is ideal for portable battery powered equipment. The input voltage range of 2.7 V to 5.5 V allows the TPS65130/1 to be directly powered from a Li-Ion battery, from 3 cells NiMH/NiCd or alkaline batteries. The TPS65130/1 comes in a small 4 mm x 4 mm QFN-24 package. Together with a minimum switching frequency of 1.25 MHz it enables designing small power supply applications since it requires only a few small external components.

The converter operates with a fixed frequency PWM control topology and, if Power Save Mode is enabled, it uses a pulse-skipping mode at light load currents. It operates with only 500 µA device quiescent current. Independent enable pins allow power up and power down sequencing for both outputs. The device has an internal current limit overvoltage protection and a thermal shutdown for highest reliability under fault conditions.

Features

  • Dual Adjustable Output Voltages Up to +15 V and Down to –15 V
  • 800mA Typical Switch Current Limit at Boost and Inverter Main Switches at TPS65130
  • 2-A Typical Switch Current Limit at Boost and Inverter Main Switches at TPS65131
  • Up to 89% Efficiency at Positive Output Voltage Rail
  • Up to 81% Efficiency at Negative Output Voltage Rail
  • Power-Save Mode for High Efficiency at Low Load Currents
  • Independent Enable Inputs for Power Up and Power Down Sequencing
  • Control Output for External PFET to Support Completely Disconnecting the Battery
  • 2.7 V to 5.5 V Input Voltage Range
  • Minimum 1.25 MHz Fixed Frequency PWM Operation
  • Thermal Shutdown
  • Overvoltage Protection on Both Outputs
  • 1 µA Shutdown Current
  • Small 4mm x 4mm QFN-24 Package (RGE)
  • APPLICATIONS
    • Small to Medium Size OLED Displays
    • (TFT) LCD and CCD Bias Supply
    • PDAs, Pocket PCs, Smartphones
    • Digital Cameras
    • Camcorders

Datasheet

 
 
12 de abril de 2015