MAX858ESA

Overview

The MAX858ESA is a high-efficiency, step-up DC-DC converter manufactured by Analog Devices Inc./Maxim Integrated. It operates with an input voltage range of 0.7V to 6V and provides a fixed output voltage of 5V. The device delivers an output current of up to 150mA and features a switching frequency of 500kHz. It functions within a temperature range of -40°C to +85°C and is housed in an 8-SOIC package.

Feature Summary

• Integrated boost topology for efficient step-up conversion from low input voltages
• Fixed 5V output capability suitable for standard logic supply requirements
• High switching frequency enables the use of compact external components

Applications

• Portable battery-powered equipment requiring voltage boosting
• Systems utilizing single-cell alkaline or NiMH batteries
• General-purpose power management in embedded electronics

Procurement Notes

Verify the specific suffix 'ESA' corresponds to the SOIC-8 package and commercial temperature grade when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors, as '+T' variants may differ in packaging format. Ensure the component source matches the original manufacturer specifications to guarantee electrical performance and reliability standards are met.

Selection Notes

Select this component when a fixed 5V output is required from inputs ranging down to 0.7V. It is appropriate for applications needing up to 150mA load current without adjustable output flexibility. Consider the 500kHz switching frequency for trade-offs between efficiency and passive component size compared to lower-frequency alternatives.

Part Context

This part belongs to the MAX85x series of step-up converters designed for portable applications. It complements other Maxim Integrated power management solutions by providing a simple, cost-effective method to extend battery life in devices powered by single-cell sources. The series focuses on minimizing external component count while maintaining stable regulation.

Replacement Considerations

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