MAX1765EEE

Overview

The MAX1765EEE is a dual-output power management IC combining a synchronous step-up DC-DC converter and a linear regulator. It operates from an input voltage range of 0.7V to 5.5V. The switching output provides up to 800mA at adjustable voltages between 2.5V and 5.5V, while the LDO delivers 500mA at 2.85V or adjustable levels from 1.25V to 5V. Operating at a fixed 1MHz frequency, it features low quiescent current of 200µA and logic-controlled shutdown drawing 0.1µA. The device is housed in a 16-pin QSOP package.

Feature Summary

• Integrates a high-efficiency synchronous boost converter with a low-dropout linear regulator for compact power solutions.
• Features exceptionally low quiescent current and microamp-level shutdown mode to extend battery life in portable devices.
• Includes adjustable inductor current limit and soft-start functionality to manage startup transients and protect against overloads.

Applications

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

Procurement Notes

Verify component authenticity due to discontinued status. Confirm RoHS compliance as the base part may not meet current standards; check for the plus suffix variant if required. Validate package integrity and pin alignment upon receipt. Ensure storage conditions prevent moisture damage despite MSL rating. Cross-reference datasheet revisions to confirm electrical characteristics match design requirements.

Selection Notes

Select this component when space constraints require integrating both switching and linear regulation in a single package. Ideal for systems needing a stable boost rail alongside a clean LDO supply. Consider thermal performance under maximum load conditions. Evaluate external component count for cost and board area optimization. Verify input voltage compatibility with the source battery or supply.

Part Context

Part of the Maxim Integrated PMIC portfolio designed for mobile electronics. The MAX1765 series targets applications requiring efficient power conversion from single-cell lithium-ion or nickel-based batteries. It replaces discrete solutions by consolidating boost and LDO functions into a small footprint, reducing bill of materials and assembly complexity for handheld consumer devices.

Replacement Considerations

MAX1765EEE+