MAX1856EUB+

Overview

The MAX1856EUB+ is a high-voltage step-down switching regulator controller manufactured by Analog Devices Inc./Maxim Integrated. Designed for robust power management, it operates with an input voltage range of 3V to 28V and delivers a negative output voltage ranging from -24V to -72V. The device features a single adjustable output channel housed in a compact 10-uMAX or uSOP surface-mount package. It supports an operating temperature range from -40°C to +85°C, ensuring reliable performance in demanding industrial environments.

Feature Summary

• Supports wide input voltage range up to 28V for flexible power sourcing
• Generates stable negative output voltages suitable for specialized analog circuits
• Compact surface-mount packaging facilitates dense board layouts

Applications

• Satellite receiver set-top boxes
• xDSL modem systems
• Cable modem infrastructure

Procurement Notes

Verify component authenticity through authorized distributors due to limited supply status. Confirm package variant matches design requirements as the part is available in both uMAX and uSOP configurations. Check current lifecycle status to ensure long-term availability for production runs.

Selection Notes

Select this controller when negative rail generation is required from standard positive bus voltages. Ensure the external inductor and diode ratings support the target -24V to -72V output range. Verify thermal management capabilities within the specified -40°C to +85°C operational window.

Part Context

This component belongs to the MAX1856 series of switching regulators. It serves as a dedicated controller rather than a complete integrated switcher, requiring external power switches and passive components. The family targets applications needing isolated or negative voltage rails from existing positive supplies.

Replacement Considerations

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