MAX6429CIUR+T

Overview

The MAX6429CIUR+T is a low-power, single-level battery monitor with internal hysteresis, manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 1V to 6V and consumes typical quiescent current of 1µA. The device features a factory-trimmed low-battery output (LBO) threshold of 2.85V with a corresponding high threshold of 3.15V. It utilizes an SOT-23-3 package and provides a minimum LBO timeout period of 140ms to ensure supply voltage stabilization before enabling system activity.

Feature Summary

• Provides single low-battery output indication for monitoring battery conditions
• Includes internal hysteresis to prevent output chatter during voltage transitions
• Features a minimum 140ms timeout period to ensure supply stability before system enablement

Applications

• Monitoring single lithium-ion cells
• Monitoring multicell alkaline power supplies
• Monitoring NiCd/NiMH power supplies

Procurement Notes

Verify the specific suffix 'C' against official Maxim Integrated documentation to confirm the exact factory-trimmed threshold voltage, as variations exist within the MAX6427–MAX6438 family. Ensure the '+T' designation matches the required reel packaging format. Confirm RoHS compliance status directly from the manufacturer's datasheet or certification documents prior to procurement.

Selection Notes

Select this component when a fixed, factory-trimmed low-battery threshold is preferred over user-adjustable options. It is suitable for applications requiring minimal external components and low standby current. Consider the SOT-23-3 package constraints for space-limited designs. Verify that the 140ms timeout aligns with system startup requirements.

Part Context

The MAX6429CIUR+T belongs to the MAX6427–MAX6438 family of low-power battery monitors. This family offers both factory-trimmed and user-adjustable threshold options in small packages. The MAX6429 specifically provides a single low-battery output indicator, distinguishing it from dual-output variants like the MAX6430 series.

FAQ

What is the function of the 140ms timeout period?

The 140ms minimum timeout ensures that supply voltages have stabilized before power-converter or microprocessor activity is enabled after the low-battery output deasserts.

How does the device indicate battery conditions?

It uses the low-battery output to indicate three conditions: battery is good (normal mode), battery is weak (low-power mode), or battery is empty (system disabled).