SP6651A is a 800mA synchronous buck regulator which is ideal for portable applications that use a Li-Ion or 3 cell alkaline/NiCD/NiMH input
The SP6651A is a high‑efficiency synchronous buck regulator designed for portable applications powered by Li‑ion or 3‑cell alkaline/NiCD/NiMH batteries. It operates from 2.7 V to 5.5 V input and delivers an adjustable output down to 1.0 V, making it suitable for PDAs, MP3 players, USB devices, and point‑of‑use power supplies.
Key features include ultra‑low 20 µA quiescent current, 98 % peak efficiency, programmable UVLO, battery‑low indicator, over‑temperature shutdown at 140 °C, and an external feedback pin for precise voltage setting. The device is offered in a 10‑pin DFN package and is available in lead‑free and tape‑and‑reel formats.
| Output Current | 800 mA |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V |
| Minimum Output Voltage | 1.0 V |
| Quiescent Current (Light Load) | 20 µA |
| Light Load Quiescent Current | 80 nA |
| Peak Efficiency | up to 98 % |
| Inductor Peak Current Limit | 1.25 A |
| Operating Temperature Range | -40 °C to +85 °C |
| Package Type | 10‑Pin DFN |
The SP6651A operates from 2.7 V to 5.5 V input.
The output voltage can be adjusted down to 1.0 V.