The ADP2138 and ADP2139 are high efficiency, low quiescent current, synchronous step-down dc-to-dc converters. The A
The ADP2138 and ADP2139 are high‑efficiency, low‑quiescent‑current step‑down converters that operate from 2.3 V to 5.5 V input and deliver up to 800 mA output. They are offered in a 6‑ball wafer‑level chip‑scale package and support both forced PWM and automatic PWM/PSM modes for flexible power‑save operation.
The devices include internal synchronous rectification, soft‑start, undervoltage lockout, and overload protection. Typical performance includes 95 % peak efficiency, 0.2 pA shutdown current, and an oscillator frequency of 2.6‑3.4 MHz. Detailed specifications, pin descriptions, and typical application circuits are provided.
| Input Voltage Range | 2.3 V to 5.5 V |
|---|---|
| Peak Efficiency | 95 % |
| Maximum Output Current | 800 mA |
| Shutdown Current (typical) | 0.2 pA |
| Oscillator Frequency | 2.6 – 3.4 MHz |
It operates from 2.3 V up to 5.5 V input.
The devices achieve up to 95 % peak efficiency.
They can supply a maximum load current of 800 mA.
The typical shutdown current is 0.2 pA.