MAX851ESA

Overview

The MAX851ESA is a boost switching regulator IC manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed positive output voltage of 5V with a maximum switch current capacity of 1.5A. The device operates within an input voltage range of 1.2V to 5.25V and supports a switching frequency of 170kHz. It features surface-mount installation in an 8-SOIC package (0.154"/3.90mm wide) and functions across a temperature range of -40°C to +85°C.

Feature Summary

• Boost topology for step-up voltage conversion
• Fixed 5V output configuration
• Integrated 1.5A switch current capability
• 170kHz internal switching frequency

Applications

• Battery-powered systems requiring voltage step-up
• Portable electronic devices
• General-purpose power management circuits

Procurement Notes

Verify the specific manufacturer designation, as sources list both Analog Devices Inc. and Maxim Integrated for this part number. Confirm the package type matches the required 8-SOIC footprint. Check for any product change notices or obsolescence warnings associated with the component series before finalizing procurement plans.

Selection Notes

Select this component when a fixed 5V output is required from a lower input voltage source up to 5.25V. Ensure the application load does not exceed the 1.5A switch current limit. Consider the 170kHz switching frequency for electromagnetic interference compatibility and filter design requirements in the target circuit.

Part Context

This component belongs to the MAX751 series of boost switching regulators. It is categorized under PMIC (Power Management Integrated Circuits) and specifically falls within the DC-DC Switching Regulators subcategory. The device is designed for efficient voltage elevation in compact surface-mount applications.

Replacement Considerations

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