The ADP2121 is a high frequency, 6 MHz, synchronous step-down DC-DC converter. It features high efficiency, low power consumption, small size and low cost.
The ADP2121 is a high‑frequency, low‑quiescent step‑down DC‑DC converter optimized for portable applications where board area and battery life are critical. It operates from 2.3 V to 5.5 V input and provides selectable fixed output voltages of 1.8 V, 1.82 V, 1.85 V, 1.875 V or 2.3 V, delivering up to 600 mA.
Key features include synchronous rectification, internal soft‑start, cycle‑by‑cycle current‑limit, undervoltage lockout, output‑to‑ground short‑circuit protection, thermal shutdown, and an ultra‑small 6‑ball WLCSP package. The device supports an automatic power‑saving mode that reduces quiescent current to the picoampere range.
| Peak Efficiency | 92 % |
|---|---|
| Quiescent Current (Auto mode, no load) | 36 pA |
| Maximum Continuous Output Current | 600 mA |
| Operating Frequency | 6 MHz |
| Thermal Shutdown Threshold | 150 °C |
In auto mode with no load, the quiescent current is typically 36 pA.
The converter can reach a peak efficiency of 92 %.
It includes cycle‑by‑cycle current‑limit, output‑to‑ground short‑circuit protection, undervoltage lockout, and thermal shutdown.