TPS61291 Reference Design Circuit | Boost Converter Application Circuit

The TPS61291 low Iq boost converter is a boost converter with pin output voltage selectable and integrated bypass mode. This article mainly introduces the TPS61291 features, application range, reference design circuit and circuit analysis to help you shorten the design time.

TPS61291 features: 0.9V to 5V input voltage range; 7.5μA quiescent current in boost mode; internal feedback divider disconnected (bypass mode); overtemperature protection

Typical application range of TPS61291: measurement (gas meter, water meter, smart meter); remote control device; residential security / home automation

TPS61291 reference design application circuit:

Figure 1 TPS61291 internal structure diagram

The TPS61291 provides two operating modes: high efficiency boost mode to generate an output voltage higher than the input voltage and bypass mode, which connects the output of the device directly to the input.

Figure 2 TPS61291 reference design

The TPS61291 is a boost converter with pin selectable output voltages and an integrated bypass mode. In bypass operation, the device provides a direct path from the input to the system and allows a low power microcontroller (MCU) to operate directly from a single 3V Li -MnO2 battery or dual alkaline battery cells.

TPS61291 Chinese data sheet: Click to download

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