Step-up boost converter with 85V switch FET

The TPS61391 from Texas Instruments is a 700kHz pulse-width modulating (PWM) step-up converter with an 85V switch FET with an input ranging from 2.5 to 5.5V. The switching peak current is up to 1,000mA. The TPS61391 includes accurate current mirror with two gain options selectable (1:5 or 4:5).

The TPS61391 also provides high optical-power protection with an additional FET in series with the APD power path with the typical response time of 0.5µs. It can recover automatically once the high optical releasing.

The TPS61391 is available in three by three millimetre QFN package with exposed pad underneath.

To learn more, click here.

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