The SP682 is a monolithic charge pump voltage converter that produces a doubled, negative voltage from a single positive supply. The SP682 charge pump outputs a –10V voltage from a +5V input. Three external charge pump capacitors are required to support the voltage conversion and voltage doubling process. An internal oscillator generates a 12kHz clock which cycles the internal switching that charges the storage and transfer capacitors. The SP682 charge pump is ideal for low power applications requiring a typical +3V battery source such as a lithium cell. Typical applications are handheld instruments, notebook and laptop computers, cellular phones, and data acquisition or GP systems.
The SP682 is a monolithic charge pump that generates a doubled, negative voltage from a single positive supply, delivering -9.9 V from a +5 V input. It is intended for low‑power portable applications such as handheld instruments, cellular phones, PDAs, and notebook computers.
The document lists electrical characteristics (typical 60 nA supply current, 99 % conversion efficiency, 12 kHz oscillator), packaging options (8‑pin NSOIC, MSOP, PDIP), shutdown feature, and ordering information for the various temperature‑rated part numbers.
| Input voltage range | +2.4 V to +5.5 V |
|---|---|
| Typical output voltage | -9.9 V |
| Conversion efficiency | 99 % typical, up to 99.9 % |
| Supply current (typical) | 60 nA |
| Oscillator frequency | 12 kHz (typical, up to 20 kHz) |
| Shutdown pin current | 3 µA |
| External capacitors required | Three external capacitors |
The SP682 operates with an input voltage from +2.4 V to +5.5 V.
The device typically achieves 99 % conversion efficiency and can reach up to 99.9 % under light load.
Three external capacitors are required for the charge‑pump operation.
Yes, the SP682 includes a shutdown pin (pin 8); applying a logic “1” to this pin activates the shutdown mode.