MAX859CSA-T

Overview

The MAX859CSA-T is a high-efficiency, step-up DC-DC converter manufactured by Analog Devices Inc./Maxim Integrated. It operates with an input voltage range of 2.6 V to 5.5 V and provides a positive adjustable output voltage from 2.7 V up to 36 V. The device features a fixed switching frequency of 1 MHz and delivers a maximum switch current of 125 mA. Packaged in an 8-SOIC format, it supports PWM dimming for LED applications and includes internal compensation for minimal external component requirements.

Feature Summary

• High-efficiency boost topology optimized for battery-powered applications
• Integrated 1 MHz switching frequency reduces passive component size
• Supports PWM dimming control for LED lighting drivers
• Internal compensation minimizes external component count

Applications

• White LED lighting drivers
• Portable consumer electronics
• Battery-operated devices requiring step-up conversion

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation. Ensure the operating temperature range aligns with system requirements. Cross-reference the datasheet revision date to validate parameter accuracy. Check for any obsolescence notices or limited availability warnings from the distributor.

Selection Notes

Select this component when a compact, high-frequency boost solution is required for low-current LED loads. The 1 MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Verify that the load current does not exceed the 125 mA switch limit. Consider thermal performance within the SOIC package for continuous operation.

Part Context

This part belongs to the MAX859 family of high-efficiency step-up converters. It is designed specifically for driving white LEDs from a single-cell lithium-ion battery or other low-voltage sources. The device integrates a power switch and control circuitry into a small footprint.

Replacement Considerations

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