This datasheet provides detailed information on the Sipex SP6644/6645 high efficiency single/dual alkaline cell boost DC-DC regulator. This device features a 90mA output current, 1.3V input voltage, 2V to 5.5V output range, 0.88V guaranteed start-up voltage, 92% high efficiency, 1.6µA VBATT quiescent current, reverse battery protection, internal synchronous rectifier, 5nA VBATT logic controlled shutdown current, low battery detection active low output and flexibility to optimize inductor type with programmable peak current control.
The SP6644 and SP6645 are high‑efficiency, low‑power step‑up DC‑DC converters designed for single or dual alkaline cell applications such as pagers, remote controls, and other portable devices. They feature an active‑LOW shutdown input, low‑battery detection, and a synchronous rectifier with an internal voltage reference.
Key characteristics include a preset 3.3 V output (adjustable 2 V‑5.5 V), up to 92 % efficiency, very low quiescent current (≈1.6 µA), reverse‑battery protection, and operation over a –40 °C to +85 °C temperature range. The devices are supplied in an 8‑pin MSOP package and include pin descriptions for easy integration.
| Typical Output Voltage | 3.30 V |
|---|---|
| Output Voltage Range | 2.0 V to 5.5 V |
| Efficiency | up to 92 % |
| Quiescent Supply Current | 1.6 µA |
| Reverse Battery Protection | Enabled |
| Operating Temperature Range | -40 °C to +85 °C |
| Package Type | 8‑Pin MSOP |
The typical output voltage is 3.30 V.
The device draws about 1.6 µA quiescent supply current.
It operates from –40 °C to +85 °C.
The output voltage can be adjusted from +2 V to +5.5 V.