ADP1822 is a PWM step-down DC-to-DC controller with margining and tracking features. It is ideal for high reliability applications such as telecommunications, medical imaging, high performance servers, and industrial applications.
The ADP1822 is a synchronous voltage‑mode PWM step‑down controller that drives an all‑N‑channel power stage to regulate output voltages as low as 0.6 V. It operates from a 3.7 V to 5.5 V chip supply and accepts a wide input voltage range of 1 V to 24 V.
Key features include output‑voltage margining and tracking, programmable soft‑start, current‑limit, thermal overload, over‑voltage and undervoltage protection, and a small 24‑lead QSOP package. The device is intended for telecom, server, medical imaging, DSP and processor core power supplies, as well as mobile‑base‑station and industrial applications.
| Input Voltage Range | 3.7 V – 24 V |
|---|---|
| Chip Supply Voltage Range | 3.7 V – 5.5 V |
| Quiescent Current (typical) | 2 mA |
| Shutdown Current | 10 µA |
| Power‑Stage Supply Voltage Range | 1 V – 24 V |
| Oscillator Frequency (typical) | 310 kHz (GND) / 570 kHz (VCC) |
| Thermal Shutdown Threshold | 145 °C |
| Operating Temperature Range | –40 °C – +125 °C |
The device accepts an input voltage from 3.7 V up to 24 V.
Typical quiescent current is about 2 mA.
The shutdown current is specified as 10 µA.
It operates from –40 °C to +125 °C.