Microchip TC1044SEOA713: A Comprehensive Technical Overview

The Microchip TC1044SEOA713 is a monolithic, switched-capacitor voltage converter from a renowned semiconductor manufacturer. This integrated circuit is engineered to perform fundamental power supply functions, primarily voltage doubling and inversion, making it an indispensable component in a wide array of battery-powered and space-constrained electronic applications. Its design offers a simple and efficient alternative to inductor-based converters.

At its core, the TC1044SEOA713 operates on the principle of switched capacitors. An internal oscillator, which can also be controlled by an external clock source, drives a network of switches that charge and discharge an external capacitor. This mechanism efficiently transfers charge to either double a positive input voltage or generate a negative output voltage from a positive input. The device is capable of converting an input voltage ranging from 1.5V to 12V, providing significant flexibility for systems powered by single-cell lithium batteries, multiple NiMH/NiCd cells, or standard 3.3V/5V rails.

A key feature of this device is its low quiescent current, typically around 80µA. This characteristic is paramount for battery-sensitive applications, as it minimizes the drain on the power source when the device is under light or no load, thereby extending the operational life of the device. Furthermore, it boasts a low output impedance of approximately 120Ω, enabling it to deliver output currents of up to 10mA, sufficient to power op-amps, sensors, and other low-power circuitry.

The TC1044SEOA713 is offered in a space-saving SOT-23-5 package. This miniature footprint is critical for modern portable and handheld electronics where PCB real estate is at a premium. The device's simplicity is another major advantage; it requires only a few external, low-cost capacitors to form a complete voltage conversion solution, eliminating the need for bulky and more expensive inductors.

Typical applications are diverse and include:

Generating a negative bias voltage for operational amplifiers and analog sensors in single-supply systems.

Doubling the voltage from a low-voltage battery to meet the requirements of specific components.

Serving as a simple and efficient charge pump for LCD bias or memory backup circuits.

ICGOODFIND: The Microchip TC1044SEOA713 stands out as an exceptionally efficient and simple solution for low-power DC voltage conversion. Its combination of a tiny form factor, minimal external component count, and low operating current makes it an ideal choice for designers of portable, battery-operated equipment who need to generate secondary supply rails without the complexity of switching regulators.

Keywords: Voltage Converter, Charge Pump, Low Quiescent Current, SOT-23-5 Package, Battery-Sensitive Applications.