AAT3635IUH-1-T1

Overview

The AAT3635IUH-1-T1 is a high-efficiency, synchronous step-down DC/DC converter from Skyworks Solutions. It integrates two power switches and operates with an input voltage range of 2.7V to 5.5V. The device delivers up to 1.5A output current with adjustable output voltages. It features a fixed switching frequency of 1.8MHz and supports pulse-skipping mode for improved light-load efficiency. The component is housed in a compact 4x4mm QFN package.

Feature Summary

• Integrates synchronous rectification for enhanced power conversion efficiency across varying load conditions.
• Utilizes pulse-skipping architecture to maintain high efficiency during light-load operations.
• Features a fixed high switching frequency to minimize external passive component size.

Applications

• Portable consumer electronics requiring efficient power management
• Battery-powered devices needing stable low-voltage regulation
• Embedded systems with strict space constraints

Procurement Notes

Verify the specific suffix 'T1' indicates the tape and reel packaging configuration as per Skyworks official documentation. Confirm that the 'IUH' designation corresponds to the correct temperature grade and package variant. Cross-reference the manufacturer's latest datasheet to ensure compliance with RoHS directives and material declarations before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring a compact solution for 3.3V or 1.8V rails from a single-cell lithium battery source. Ensure the application demands a switching frequency around 1.8MHz to balance EMI and inductor size. Verify that the required output current does not exceed the 1.5A continuous limit under maximum ambient temperature conditions.

Part Context

This part belongs to Skyworks' AAT3635 family of synchronous buck converters. It is designed specifically for mobile applications where board space and battery life are critical. The series offers various output voltage options and package sizes to accommodate diverse design requirements within portable electronic devices.

Replacement Considerations

Consult Skyworks official substitution guides for direct pin-compatible alternatives. Verify electrical parameters such as switching frequency and current limits against potential substitutes to ensure circuit stability without redesigning the feedback network or inductor selection.

FAQ

What is the typical efficiency at light loads?

The device employs pulse-skipping mode to significantly improve efficiency when the load current is low, reducing quiescent current consumption.

Is the output voltage adjustable?

Yes, the output voltage can be adjusted using external resistors, allowing for flexibility in setting the regulated output level within the specified range.