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Product Detailed Parameters
- Description：IC BATT MON MULT-CHEM 1C SOT23-3
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Bulk
- Function：Battery Monitor
- Battery Chemistry：Multi-Chemistry
- Number of Cells：1
- Fault Protection：-
- Interface：-
- Operating Temperature：-40°C ~ 85°C (TA)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
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Overview
The MAX6429KTUR-T is a low-power, single-level battery monitor with internal hysteresis. It operates within a supply voltage range of 1V to 6V and features a fixed low-battery output threshold of 2.85V. The device draws a typical quiescent current of 1µA. It provides a push-pull low-battery output (LBO) signal that asserts when the input voltage drops below the threshold and deasserts after rising above the high threshold for a minimum timeout period of 140ms. The component is housed in a SOT-23-3 package and is specified over an operating temperature range of -40°C to +125°C.
Feature Summary
- Provides a single low-battery output indicator with factory-trimmed thresholds
- Features internal hysteresis to prevent output chatter during voltage transitions
- Includes a minimum 140ms timeout period to ensure supply voltage stabilization before enabling system activity
Applications
- Monitoring single lithium-ion cells
- Monitoring multicell alkaline power supplies
- Monitoring NiCd or NiMH battery packs
Procurement Notes
Verify the specific suffix 'KTUR' against official Analog Devices documentation to confirm the exact threshold voltage and package variant. Ensure the part number matches the manufacturer's current naming convention, as older Maxim Integrated designations may have been updated. Confirm RoHS compliance status directly from the datasheet revision history.
Selection Notes
Select this component for applications requiring a simple, low-current method to indicate weak battery conditions. The fixed threshold simplifies design by removing the need for external resistor networks. Consider the 140ms delay when designing systems that require immediate shutdown upon voltage drop. Verify that the 1µA quiescent current aligns with the system's standby power budget.
Part Context
This device belongs to the MAX6427–MAX6438 family of battery monitors. These devices are designed to indicate three battery states: good, weak, or empty. The MAX6429 specifically offers a single low-battery output, distinguishing it from dual-output variants like the MAX6430 series. The family supports both push-pull and open-drain output configurations across different part numbers.
FAQ
What is the function of the 140ms timeout period?
The 140ms minimum timeout ensures that the supply voltage has stabilized before the low-battery output deasserts, preventing premature enabling of power-converter or microprocessor activity.
How does the device handle noise on the battery line?
The device incorporates internal hysteresis, which prevents the low-battery output from chattering due to noise when the supply voltage is near the threshold level.
