The TC7662A is a voltage converter that is widely used in applications such as laptop computers, disk drives, process instrumentation, and µP-based controllers. It features a wide operating range, increased output current, no external diodes required, and low output impedance.
The TC7662A is a CMOS charge‑pump DC‑to‑DC converter that converts a +3 V to +18 V input into a corresponding –3 V to –18 V output using only two low‑cost capacitors, eliminating the need for inductors. It offers a wide operating range, higher output current (up to 40 mA) and low output impedance, and is pin‑compatible with the TC7660 family.
The document provides electrical characteristics, pin descriptions, typical application circuits, and design guidelines such as oscillator frequency adjustment, parallel and cascaded device usage, and dos and don’ts for reliable operation. Package options include 8‑Pin PDIP and 8‑Pin CERDIP for commercial and extended temperature ranges.
| Input voltage range | 3 V to 18 V |
|---|---|
| Maximum output current | 40 mA |
| Oscillator nominal frequency | 12 kHz |
| Output source resistance (Ro) | 40 Ω min, 50 Ω typ |
| Power efficiency | 93 % min, 97 % typ |
| Operating temperature range (extended) | -55 °C to +125 °C |
The TC7662A operates with an input voltage from 3 V up to 18 V.
It can source up to 40 mA of output current.
The on‑board oscillator runs at a nominal 12 kHz, but can be lowered with an external capacitor on pin 7.
The device is offered in 8‑Pin PDIP and 8‑Pin CERDIP packages, both in commercial and extended temperature ranges.