MAX1765EUE

Overview

The MAX1765EUE is a dual-output power management IC integrating an 800mA synchronous step-up DC-DC converter and a 500mA low-dropout linear regulator. It operates from an input voltage range of 0.7V to 5.5V with a fixed 1MHz switching frequency. The boost output provides adjustable voltages between 2.5V and 5.5V, while the LDO offers either a fixed 2.85V or an adjustable output from 1.25V to 5V. Packaged in a 16-pin TSSOP with an exposed pad, it supports logic-controlled shutdown and includes thermal protection features for portable applications.

Feature Summary

• Integrates a high-efficiency synchronous step-up converter with a separate low-noise linear regulator
• Features logic-controlled shutdown mode for extended battery life in portable devices
• Includes adjustable inductor current limit and soft-start functionality to manage startup transients

Applications

• Battery-powered wireless handsets and PCS phones
• Palmtop computers and personal communicators
• Hand-held instruments and portable audio players

Procurement Notes

Verify component authenticity through authorized distributors due to discontinued status. Confirm RoHS compliance requirements as original versions may not meet current environmental standards. Validate package integrity upon receipt, ensuring the exposed thermal pad is undamaged for proper heat dissipation during operation.

Selection Notes

Select this component when designing compact systems requiring simultaneous regulated rails from a single-cell lithium-ion source. The integrated topology reduces external component count compared to discrete solutions. Ensure the application load profile stays within the specified 800mA and 500mA limits for each respective regulator channel.

Part Context

Part of the Maxim Integrated MAX1765 family designed for space-constrained mobile electronics. It replaces older discrete boost and LDO combinations by consolidating power management functions into a single small-footprint package, optimizing board area for handheld consumer devices.

Replacement Considerations

MAX1765EEE+ is a direct replacement available from Analog Devices Inc./Maxim Integrated.