MAX859CSA

Overview

The MAX859CSA is a high-efficiency, CMOS step-up DC-DC switching regulator manufactured by Analog Devices Inc./Maxim Integrated. Designed for small, low input voltage or battery-powered systems, it accepts an input supply voltage ranging from 0.8V to 6.0V and generates higher adjustable output voltages in the 2.7V to 6.0V range. The device features a typical efficiency greater than 85% at 100mA load. It incorporates switch-current limits of 125mA and 500mA to permit the use of low-cost inductors. The component operates with a switching frequency up to 500kHz and includes a low-battery detector (LBI/LBO). It is housed in an 8-pin SO package.

Feature Summary

• High-efficiency CMOS step-up DC-DC conversion architecture optimized for low input voltage applications
• Integrated low-battery detector functionality for system power management
• Configurable switch-current limits supporting the utilization of cost-effective inductor components

Applications

• Battery-powered portable electronic devices
• Small systems requiring low input voltage regulation
• Applications necessitating efficient step-up voltage conversion

Procurement Notes

Verify the specific suffix 'CSA' against official manufacturer documentation to confirm package type and temperature rating. Confirm current lifecycle status as this series may be discontinued. Ensure compatibility with required input voltage ranges and output specifications before integration into design.

Selection Notes

Select this component when designing circuits that require boosting low battery voltages to stable operational levels. Consider the 500kHz switching frequency for size constraints on passive components. Evaluate thermal performance within the specified operating temperature range during initial design phases.

Part Context

This part belongs to the MAX856-MAX859 family of high-efficiency, CMOS, step-up, DC-DC switching regulators. These devices are specifically engineered for small, low input voltage or battery-powered systems, offering pin-selectable or adjustable output voltages with typical efficiencies exceeding 85%.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.