Small, simple and efficient voltage inverter for Op Amp biasing

In this reference design, the TPS62120 provides a small, simple, and efficient voltage inverting circuit to be used for low power negative voltage rails, such as biasing an op amp.  This configuration has been tested with a full test report and operation explanation.

Features:

Only 6 external components required for a complete solution
IC available in a 2 x 2 mm SON package for smallest size
IC available in 3 x 3 mm SOT package for easier assembly and extra features
Fully integrated, user selectable output discharge function
80% efficiency over a wide load range
Up to 50 mA output current at 5V input

This reference design includes:
 
TPS62120: 15V, 75mA, 96% efficiency Step-Down Converter with DCS-Control
TPS62122: 15V, 75mA, 96% efficiency Step-Down Converters

Learn more by downloading the reference design below