Buck-boost regulator with a wide input window
The ADP1110AR is a step-up/step-down switching regulator from Analog Devices in the ADP1110 series. It uses a buck-boost topology to produce an adjustable positive output.
What the input range and output adjustability mean for the BOM
The input can go as low as 1 V and as high as 30 V. The output is adjustable from a 1.245 V reference up to 30 V.
Package and mounting — SOIC-8, surface-mount only
The ADP1110AR comes in an 8-pin SOIC package (0.154" body width, 3.90 mm), surface-mount. The supplier device package is also 8-SOIC.
Closest functional peer — ADP1111ARZ
The ADP1111ARZ is the nearest functional sibling in the same family. It also does step-up/step-down, but it adds the ability to generate a negative output (positive or negative configuration), and it switches at 72 kHz instead of 70 kHz. The ADP1111ARZ comes in a tube (not bulk) and its input minimum is 2 V rather than 1 V — so it loses the ability to run from a nearly dead single cell. If your design needs a negative rail or you can live with a 2 V input floor, the ADP1111ARZ is a direct swap in the same SOIC-8 footprint. For sub-2 V battery operation, stick with the ADP1110AR.
