Microchip TC7662BCOA713 CMOS Voltage Converter: Datasheet, Application Circuit, and Typical Performance Characteristics

The Microchip TC7662BCOA713 is a versatile and robust CMOS voltage converter integrated circuit, widely used for generating a negative supply voltage from a single positive input. This device is part of a family of charge-pump voltage converters that operate with a high power conversion efficiency and require minimal external components. Its primary function is to invert the input voltage, making it an ideal solution for applications where a negative bias voltage is required but only a positive supply is available.

Datasheet Overview

The datasheet for the TC7662BCOA713 provides comprehensive information on its electrical characteristics, absolute maximum ratings, and operational guidelines. Key parameters include an input voltage range from 1.5V to 12V, allowing flexibility for both low-voltage and moderate-voltage systems. The device can deliver output currents up to 20mA with a typical power efficiency of 98%. It features low power consumption, with a typical supply current of just 100µA, making it suitable for battery-powered applications. The TC7662BCOA713 is housed in an 8-pin SOIC package, ensuring a compact footprint on PCBs.

Application Circuit

A typical application circuit for the TC7662BCOA713 is straightforward, requiring only two external capacitors to form a complete voltage inverter. The basic configuration involves connecting a flying capacitor (C1) between pins 2 (CAP+) and 4 (CAP-) and a reservoir capacitor (C2) from the output (pin 5) to ground. The input voltage (V+) is applied to pin 8, while the inverted output (VOUT = -V+) is available at pin 5. Pin 3 (LV) is tied to ground for standard operation with input voltages below 3.5V, but can be left open for higher input voltages to reduce internal power dissipation. This simple setup demonstrates the device's ease of use and ability to minimize design complexity and component count.

Typical Performance Characteristics

The performance of the TC7662BCOA713 is characterized by several key graphs in the datasheet, including output voltage vs. output current, power efficiency vs. load, and output ripple vs. frequency. Under typical conditions, the output voltage remains within 90% of the ideal inverted value for load currents up to 10mA. The switching frequency is internally set at 10kHz, which contributes to low output ripple when paired with capacitors of 10µF or higher. The device exhibits excellent stability over temperature, with performance maintained from -40°C to +85°C. Furthermore, its low output impedance ensures good load regulation, making it reliable for powering analog circuits such as op-amps, sensors, and data converters.

ICGOOODFIND: The Microchip TC7662BCOA713 is a highly efficient and easy-to-use CMOS voltage converter, perfect for generating negative supplies in space-constrained and power-sensitive designs. Its minimal external component requirement and robust performance across temperature variations make it a preferred choice for engineers.

Keywords: Voltage Inverter, Charge Pump, CMOS, Negative Voltage Generator, Low Power Consumption.