The ADP1111 is a micropower step-up/step-down SW regulator from Analog Devices; Adjustable and Fixed 3.3 V, 5 V, 12 V.
The ADP1111 is a low‑power switch‑mode regulator that can operate from 2 V to 30 V input and provide step‑up, step‑down, or inverting conversion with only a few external components. Fixed‑output versions (3.3 V, 5 V, 12 V) and an adjustable version are offered, delivering up to 200 mA at 5 V in step‑down mode.
Typical applications include laptop and palmtop computers, cellular phones, flash memory VPP generators, remote controls, battery‑backup and uninterruptible supplies, and portable instruments. The device features an internal 1 A power switch, user‑adjustable current limit, low‑battery detection, and a 72 kHz oscillator.
| Input Voltage (Step‑Up Mode) | Min 2.0 V, Typ 12.6 V |
|---|---|
| Input Voltage (Step‑Down Mode) | Max 30.0 V |
| Oscillator Frequency | Typ 72 kHz |
| Fixed Output Voltage (ADP1111‑5) | Typ 5.00 V |
Fixed‑output versions are offered for 3.3 V, 5 V, and 12 V.