This document describes the high voltage, low quiescent current buck regulator, ADP2370/ADP2371. The product features an input voltage range of 3.2V to 15V and an output current of 800mA. It has a quiescent current of less than 14µA in power saving mode (PSM). The features include >90% efficiency, a force PWM pin (SYNC), a 600kHz/1.2MHz frequency pin (FSEL), fixed outputs of 0.8V, 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V, 5V, and an adjustable option, among others.
The ADP2370 and ADP2371 are 1‑A buck (step‑down) DC‑DC converters offered in an 8‑lead LFCSP package (3 mm × 3 mm). They operate from 3.2 V to 15 V input and deliver up to 800 mA output with efficiencies above 90 %. The devices feature a synchronous rectifier, internal power‑switch, soft‑start, and a power‑good pin for output monitoring.
Both parts support fixed output voltages (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 5 V) and an adjustable range from 0.8 V to 14 V. Frequency can be set by an external clock (600 kHz–1.2 MHz) or forced via the FSEL pin. The ADP2371 adds a quick‑output‑discharge (QOD) function. The design requires only three external components (one inductor, one input capacitor, one output capacitor).
| Input Voltage Range | 3.2 V to 15 V |
|---|---|
| Output Current | 800 mA |
| Quiescent Current (PSM) | < 14 pA |
| Fixed Output Options | 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 5 V |
| Adjustable Output Voltage Range | 0.8 V to 14 V |
| Package Type | 8‑lead LFCSP (3 mm × 3 mm) |
The device operates from 3.2 V up to 15 V input.
It can deliver up to 800 mA of output current.
Both parts are offered in an 8‑lead LFCSP package measuring 3 mm × 3 mm.
Yes, the PG pin provides an open‑drain power‑good output when the output voltage is above 92 % of its nominal value.