MAX870EUK+T

Overview

The MAX870EUK+T is a switched-capacitor voltage inverter IC manufactured by Analog Devices Inc./Maxim Integrated. It functions as a charge pump to generate negative supply voltages from a single positive source, specifically designed for LCD bias applications. The device operates within an input voltage range of 2.7V to 5.5V and provides an adjustable output voltage typically between -1.4V and -5.5V. It is housed in a compact SOT-23-5 surface-mount package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Generates negative voltage rails from a single positive supply using switched-capacitor technology
• Designed specifically for providing bias voltages in liquid crystal display (LCD) circuits
• Operates with low external component count due to integrated charge pump architecture

Applications

• Liquid Crystal Display (LCD) bias voltage generation
• Negative power supply creation for single-supply systems
• Portable electronic devices requiring compact voltage inversion

Procurement Notes

Verify the exact suffix configuration against the manufacturer's current datasheet, as ordering codes may vary based on tape-and-reel specifications or regional distribution agreements. Confirm that the SOT-23-5 package variant matches your PCB footprint requirements. Ensure compatibility with the intended input voltage range before finalizing procurement decisions.

Selection Notes

Select this component when a compact solution is needed to invert polarity for LCD or similar analog loads without requiring an inductor-based switching regulator. Consider the maximum output current capability and efficiency at your specific load conditions. Verify that the SOT-23-5 package fits your assembly constraints and that the thermal performance meets your application's ambient temperature requirements.

Part Context

This part belongs to the Maxim Integrated family of switched-capacitor voltage converters. These devices are commonly used in portable electronics where space and power efficiency are critical. The MAX870 series specifically targets applications requiring stable negative voltages for display drivers or sensor interfaces, offering a simpler alternative to magnetic-based DC-DC converters.

Replacement Considerations

Public confirmed substitute part numbers: None identified.