I2C controlled buck-boost regulator allows on-the-fly output voltage programming

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By eeNews Europe

The I2C interface allows output voltages to be changed instantaneously or ramped between two values.

The ISL9112 simplifies design by providing a regulated output voltage from an input that can be either above or below the output voltage. The regulator minimizes external components, requiring just a single inductor and two capacitors. It also features the industry’s lowest voltage deviation during transitions between buck and boost modes, providing designers with flexibility in selecting the optimal output voltage. The ISL9112’s 2.5 MHz switching frequency is also the highest available in a buck-boost regulator, further minimizing external component sizes.

The device can deliver more than 2 A at 2 Vout or 1.2 A at 3.0 Vout from a single Li-Ion battery (the industry’s highest current capability in a tiny 3 x 3 mm footprint). Output voltages can be programmed down to 1.9 V or up to 5.0 V, which is ideal for camera flash LED drives, RF power amplifiers and other functions with varying supply voltage requirements.

The ISL9112 is available now in a compact 12-pin, 3×3 mm TDFN package. Pricing starts at $2.13 each in 1,000-piece quantities.

More information about ISL9112 I2C controlled buck-boost regulator at


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