Microchip TC7662A DIP-8 DC-DC Converter IC, 40mA

The Microchip TC7662A CPA is a CMOS charge pump DC-to-DC voltage converter designed for efficient power supply inversion in process instrumentation and control systems. This integrated circuit serves as a pin-compatible, enhanced-performance upgrade to the industry-standard TC7660, offering a wider operational input voltage range of +3V to +18V to generate a corresponding inverted output from -3V to -18V.

A key advantage of this charge pump topology is its simplicity and cost-effectiveness. The conversion requires only two inexpensive external capacitors, completely eliminating the need for inductors. This not only reduces the component cost and physical footprint of your design but also avoids the electromagnetic interference (EMI) issues commonly associated with inductive switching regulators.

Performance and Features

• High Output Capability: Capable of sourcing output currents up to 40mA, significantly higher than its predecessor, making it suitable for a broader range of applications.
• Integrated Oscillator: Features an on-board oscillator with a nominal frequency of 12kHz for reliable operation.
• Frequency Adjustment: For applications demanding lower supply current, the oscillator frequency can be reduced below 12kHz by connecting an external capacitor between the OSC pin and ground.
• Simplified Design: Requires no external diodes for operation and has no requirement for a low-voltage terminal, streamlining circuit design and bill of materials.
• Low Output Impedance: Delivers a typically low output impedance of 40Ω at a 20mA load, ensuring good voltage regulation.

Physical and Electrical Specifications

The device is constructed using reliable CMOS technology and is offered in a standard 8-pin DIP (Dual In-line Package) format, making it ideal for through-hole PCB mounting in prototypes, educational kits, and industrial equipment. Its