The SP6656 is a 400mA synchronous buck regulator that is ideal for portable applications that use a Li-Ion or 3 cell alkaline/NiCD/NiMH input. The SP6656’s proprietary control loop, 20µA light load quiescent current, and 0.3Ω power switches provide excellent efficiency across a wide range of output currents. As the input battery supply decreases towards the output voltage the SP6656 seamlessly transitions into 100% duty ratio operation further extending useful battery life. The SP6656 is protected against overload and short circuit conditions with a precise inductor peak current limit. Other features include externally programmable output voltage down to 1.0V, dynamically adjustable output voltage, logic level shutdown control, and 140°C over temperature shutdown.
The SP6656 is a high‑efficiency synchronous buck regulator designed for portable applications powered by Li‑ion or alkaline batteries. It operates from 2.7 V to 5.5 V input and provides a dynamically adjustable output down to 1.0 V, achieving up to 98 % efficiency and a light‑load quiescent current of only 20 µA.
Key features include an inductor peak‑current limit of 625 mA, 100 % duty‑ratio operation at heavy load, external feedback voltage programming, logic‑level shutdown control, and over‑temperature shutdown at 140 °C. The device is offered in a compact 10‑pin DFN package (2.4 × 2.5 mm).
| Input Voltage Range | 2.7 V – 5.5 V |
|---|---|
| Adjustable Output Voltage | 1.0 V – Vin |
| Quiescent Current (light load) | 20 µA |
| Efficiency | up to 98 % |
| Inductor Peak Current Limit | 625 mA |
| Package | 10‑pin DFN (2.4 × 2.5 mm) |
The regulator operates from 2.7 V to 5.5 V input.
The device draws only 20 µA in light‑load condition.
The output voltage is programmed via an external feedback network on the FB pin.
It is supplied in a 10‑pin DFN package measuring 2.4 × 2.5 mm.