MIC2225-G4YMT

Overview

The MIC2225-G4YMT is a dual-output voltage regulator manufactured by Micrel, now part of Microchip Technology. It integrates a high-efficiency 2MHz PWM synchronous buck (step-down) DC/DC converter and a 300mA Low Dropout (LDO) regulator. The switching regulator accepts an input voltage range of 2.7V to 5.5V and delivers up to 600mA output current with internal power MOSFETs. The device operates at a constant 2MHz frequency in PWM mode, achieving greater than 95% efficiency. It is housed in a compact 10-pin 2mm x 2mm Thin MLF package and supports fixed output voltages down to 1V.

Feature Summary

• Integrates a 2MHz synchronous buck converter and a 300mA LDO in a single ultra-small package
• Features fully integrated internal power MOSFET switches for high efficiency
• Includes micropower shutdown mode reducing current consumption to 1mA
• Provides thermal shutdown and current limit protection

Applications

• Application processor core and I/O supply rails
• Camera DSP power supplies
• Multimedia chipset power management

Procurement Notes

Verify the manufacturer origin carefully, as Micrel was acquired by Microchip Technology. Confirm that the suffix G4YMT corresponds to the specific fixed output voltage variant required for your design. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability. Check RoHS compliance status if environmental regulations are a constraint for your specific project requirements.

Selection Notes

Select this component when space constraints require a dual-output solution combining a high-current switching regulator with a low-noise LDO. The 2MHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Ensure the input voltage stays within the 2.7V to 5.5V range and that the load does not exceed the 600mA buck or 300mA LDO limits. Verify thermal performance in the final enclosure design.

Part Context

This device belongs to the MIC2225 family of dual-channel regulators designed for portable electronics. It serves as a compact power management solution for systems requiring multiple voltage rails from a single source. The integration of both switching and linear regulation reduces board area and simplifies power distribution network design for complex digital loads.

Replacement Considerations

Direct substitutes include other MIC2225 variants with different output voltage suffixes, such as MIC2225-4KYMT TR or MIC2225-4OYMT. These share identical pinouts and functional specifications but provide different fixed output voltages. Cross-referencing datasheets is necessary to confirm electrical compatibility.