Microchip TC7662BCOA Adjustable Charge Pump Voltage Converter, SOIC-8

The Microchip TC7662BCOA is a charge pump DC-to-DC voltage converter designed for data acquisition systems. It converts a +1.5V to +15V input into a corresponding -1.5V to -15V output, requiring only two low-cost capacitors and eliminating the need for inductors, thereby reducing cost, size, and electromagnetic interference (EMI).

The on-board oscillator operates at a nominal frequency of 10kHz, which can be increased to 35kHz by connecting pin 1 to V+, allowing the use of smaller external capacitors. For lower supply current applications, operation below 10kHz is possible by connecting an external capacitor from OSC to ground, with pin 1 left open.

Key Features:

• High power efficiency of up to 96%
• Easy to use: requires only 2 external non-critical passive components
• Improved direct replacement for industry standard ICL7660 and other second source devices
• Includes all necessary circuitry for a negative voltage converter, except for two external capacitors (inexpensive 1μF polarized electrolytic types)

Specifications:

• Input voltage range: 1.5V to 15V
• Output voltage range: -1.5V to -15V (adjustable)
• Maximum output current: 20mA
• Topology: Doubler, Inverting
• IC case/package: SOIC-8
• Number of pins: 8
• IC mounting: Surface mount
• Operating temperature range: 0°C to 70°C

This converter is an efficient and compact solution for generating negative supply rails in various electronic applications, offering high performance and reliability.