MAX6777LT+

Overview

The MAX6777LT+ is a low-power, single-cell battery monitor manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 1 V to 5.5 V and features an ultra-low quiescent current of 7 uA. The device provides accurate battery monitoring with 1% accuracy and includes a low-battery output with fixed hysteresis to prevent chatter. It supports alkaline, lithium-ion, nickel cadmium (NiCd), and nickel metal hydride (NiMH) battery types. The component is housed in a compact UDFN-6 surface-mount package and functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Provides highly accurate single-cell battery monitoring for various chemistries including Li-ion, NiCd, and NiMH.
• Features a low-battery output with fixed hysteresis to eliminate signal chatter caused by input noise or terminal recovery.
• Designed for minimal power consumption with a low quiescent current suitable for extended battery life applications.

Applications

• Monitoring single lithium-ion cells in portable electronic devices
• Power management for multi-cell alkaline power sources
• Battery status indication in consumer electronics using NiCd or NiMH batteries

Procurement Notes

Verify availability as the part may be subject to limited supply or factory special orders. Confirm that the ordering suffix matches the required package and temperature specifications. Ensure compliance with RoHS standards if applicable to your manufacturing process. Check for obsolescence status before finalizing procurement plans.

Selection Notes

Select this component when precise single-cell voltage monitoring is required with minimal power overhead. Consider the fixed hysteresis feature for environments prone to electrical noise. Verify compatibility with the specific battery chemistry in use, such as Lithium-ion or Nickel-based cells. Ensure the UDFN-6 package fits the available PCB space constraints.

Part Context

The MAX6777LT+ belongs to the MAX6775–MAX6781 family of low-power, 1%-accurate battery monitors. This series offers both single and dual low-battery outputs in ultra-small packages like µDFN and SC70. These devices are engineered for monitoring single lithium-ion cells or multicell alkaline/NiCd/NiMH power sources in portable applications.

Replacement Considerations

The MAX6775LT+, MAX6776LT+, and MAX6778LT+ are members of the same family offering similar low-power monitoring capabilities. Verify pinout and functional equivalence before substitution. Other variants may offer different hysteresis options or dual-output configurations.