MIC3385-1.5YHL-TR

Overview

The MIC3385-1.5YHL-TR is a dual-output power management IC from Microchip Technology, integrating a synchronous buck converter and a low-dropout (LDO) regulator in a single package. The synchronous buck section provides a fixed 1.5V output with a maximum current capacity of 1A, while the LDO delivers a fixed 1.5V output at up to 120mA. Operating within an input voltage range of 2.7V to 5.5V, the device utilizes an 8MHz switching frequency for efficient power conversion. It is housed in a compact 14-MLF® (3x3.5mm) surface-mount package and supports operation across an extended temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency synchronous buck converter and a precision LDO regulator into a single compact solution.
• Features a fixed 1.5V output on the buck channel optimized for delivering up to 1A of continuous load current.
• Includes a dedicated LDO channel providing a stable 1.5V supply capable of sourcing up to 120mA.
• Operates reliably over an extended industrial temperature range from -40°C to +125°C.

Applications

• Powering microcontrollers and digital signal processors requiring multiple regulated voltage rails.
• Supplying logic circuits and memory interfaces in embedded systems.
• Providing clean power for analog-to-digital converters and sensor modules.
• Serving as a point-of-load regulator in portable consumer electronics.

Procurement Notes

Verify that the specific part number MIC3385-1.5YHL-TR matches the required fixed 1.5V outputs for both channels. Confirm the 14-MLF® package dimensions align with your PCB footprint design. Ensure the supplier documentation confirms compliance with RoHS standards and validates the operating temperature range for your intended application environment.

Selection Notes

Select this component when a combined buck and LDO solution is needed to save board space and simplify bill of materials. The fixed 1.5V outputs are suitable for applications where standard logic levels or specific core voltages are required without external feedback resistors. Consider the 8MHz switching frequency for smaller passive component sizes compared to lower-frequency alternatives.

Part Context

This device belongs to the MIC3385 family of dual-output regulators designed for space-constrained applications. It combines the efficiency of a synchronous buck topology with the low noise and simplicity of an LDO. The integration reduces component count and assembly complexity compared to using discrete regulators, making it ideal for modern compact electronic designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs by comparing pinouts, electrical specifications, and thermal requirements before considering alternative components.

FAQ

What is the switching frequency of the MIC3385-1.5YHL-TR?

The integrated synchronous buck converter operates at a fixed switching frequency of 8MHz.

Does the MIC3385-1.5YHL-TR have adjustable outputs?

No, the MIC3385-1.5YHL-TR variant features fixed 1.5V outputs for both the buck converter and the LDO regulator.

What is the maximum output current for the LDO channel?

The LDO channel can deliver a maximum output current of 120mA.