Microchip Technology MIC3385YHL-TR

Overview

MIC3385YHL-TR from Microchip Technology, originally from Micrel, is a high-efficiency 8 MHz inductorless buck regulator with a LOWQ LDO standby mode. The device is designed for portable and space-constrained power-management applications that require compact size, low output noise, and efficient battery operation.

MIC3385YHL-TR operates from a 2.7 V to 5.5 V input supply and can supply up to 600 mA output current in PWM mode. Its inductorless architecture reduces external component count and supports compact PCB layouts for handheld electronics, portable instruments, wireless modules, and low-noise embedded power rails.

Technical Context

In battery-powered systems, MIC3385YHL-TR typically operates as a compact step-down regulator that provides a stable low-voltage rail while avoiding the space and EMI challenges of a traditional inductor-based buck converter.

Under normal load conditions, the device uses constant-frequency 8 MHz PWM control. Under light-load or standby conditions, LOWQ LDO standby mode maintains the output voltage with very low quiescent current.

MIC3385YHL-TR is commonly used in portable electronics, handheld instruments, wearable products, communication modules, battery-powered embedded systems, and noise-sensitive mixed-signal platforms.

Key Specifications

Pinout & Package

The MIC3385YHL-TR pinout is optimized for compact inductorless DC-DC conversion and includes input supply, output, flying capacitor connections, feedback, enable/control, LOWQ mode control, and ground connections.

For PCB design, charge-pump and output capacitors should be placed close to the IC pins to minimize parasitic impedance. Ground return, thermal pad connection, and short high-frequency current paths are important for stable output voltage.

Key Features

• 8 MHz constant-frequency PWM inductorless buck regulation.
• LOWQ LDO standby mode reduces quiescent current in light-load operation.
• 2.7 V to 5.5 V input voltage range supports portable battery-powered systems.
• Up to 600 mA output current in PWM mode.
• No external inductor required, reducing height, area, and magnetic components.
• Compact 14-pin 3 mm x 3.5 mm MLF package.

Applications

Equivalent & Alternatives

When evaluating a MIC3385YHL-TR equivalent, engineers should compare electrical ratings, package, pinout, thermal behavior, control functions, and long-term sourcing requirements.

Quality

MIC3385YHL-TR should be sourced as original Microchip Technology components through traceable and controlled supply channels. Quality verification may include package inspection, marking validation, solderability testing, electrical output verification, and standby-current measurement.

Because the device uses high-frequency switching and capacitor-based conversion behavior, PCB layout, capacitor selection, grounding, and thermal design should be validated under real load and standby conditions.

Availability

MIC3385YHL-TR available at Aetrix Electronics and is suitable for compact portable power-management platforms requiring stable component sourcing and repeatable production support.

For production builds, confirming package type, output-voltage option, lead time, lifecycle status, and sourcing continuity helps reduce procurement and manufacturing risk.

Manufacturer

Microchip Technology is a semiconductor manufacturer specializing in microcontrollers, analog ICs, power-management devices, mixed-signal products, connectivity solutions, and embedded development ecosystems.

FAQ

What is MIC3385YHL-TR used for?

MIC3385YHL-TR is used for compact portable power conversion, battery-powered embedded electronics, handheld instruments, wireless modules, and low-noise power rails.

Where can I find the MIC3385YHL-TR datasheet download?

The MIC3385YHL-TR datasheet download is available from Microchip and includes electrical specifications, operating modes, package information, and application guidance.

Does MIC3385YHL-TR require an external inductor?

No. MIC3385YHL-TR is an inductorless buck regulator, so it does not require the external inductor used by conventional buck converters.

What should be considered in MIC3385YHL-TR pinout design?

Prioritize capacitor placement, short high-frequency current loops, clean grounding, thermal-pad connection, and proper routing of feedback and control pins.

What are common MIC3385YHL-TR equivalent solutions?

Common related solutions include MIC3385-1.5YHL-TR and selected low-power buck regulator families when inductor-based conversion is acceptable.