MAX871EUK

Overview

The MAX871EUK+T is a monolithic CMOS charge-pump voltage inverter manufactured by Analog Devices Inc./Maxim Integrated. It accepts input voltages ranging from +1.4V to +5.5V and operates at a switching frequency of 500kHz. The device provides high efficiency with a quiescent current of 0.7mA and delivers up to 25mA output current. It requires only two external capacitors for operation and is housed in a compact 5-pin SOT-23 package.

Feature Summary

• Inverts the input supply voltage to generate a negative rail
• Operates efficiently with minimal external components requiring only two capacitors
• Features low quiescent current consumption suitable for battery-powered applications

Applications

• Generating local -5V supplies from 5V logic sources
• Powering small LCD panels
• Battery-operated equipment and handheld terminals

Procurement Notes

Verify the specific suffix 'EUK' against official manufacturer documentation to confirm pinout and thermal characteristics. Ensure compatibility with the required input voltage range of +1.4V to +5.5V. Confirm that the 500kHz switching frequency aligns with your system's noise constraints. Validate component authenticity through authorized distribution channels.

Selection Notes

Select this component when a compact solution for voltage inversion is required within a low-voltage range. Consider the 25mA output limit for load requirements. The SOT-23-5 package is suitable for space-constrained designs. Evaluate the 500kHz frequency impact on electromagnetic interference compared to lower-frequency alternatives.

Part Context

This part belongs to the MAX870/MAX871 family of ultra-small switched-capacitor voltage inverters. While the MAX870 operates at 125kHz, the MAX871 variant specifically utilizes a 500kHz frequency. Both share similar architectural features but differ in switching speed and associated capacitor sizing requirements.

Replacement Considerations

The MAX870 serves as a functional alternative within the same family, offering identical voltage inversion capabilities but operating at a lower 125kHz frequency. Verify if the reduced switching frequency meets specific EMI or capacitor size constraints.