MIC5255-4.75BM5 TR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The MIC5255-4.75BM5 TR is a fixed positive linear low-dropout regulator manufactured by Microchip Technology, housed in a 5-pin SOT-23 package. It provides a fixed output voltage of 4.75V with a maximum continuous output current of 150mA. The device operates within an input voltage range of 2.7V to 6.0V and features a typical dropout voltage of 135mV at full load. It includes an enable pin for shutdown control, thermal shutdown protection, and current limiting.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low noise performance optimized for RF applications
• Stability ensured with low-ESR ceramic output capacitors
• TTL-logic-compatible enable pin for zero off-mode current
• Integrated thermal shutdown and current limit protection

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Cellular phones and pagers
• Battery-powered equipment
• Laptop, notebook, and palmtop computers
• Consumer and personal electronics

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer designation as Micrel or Microchip Technology, noting historical acquisition details. Ensure the component matches the 5-pin SOT-23 physical footprint and electrical specifications for the 4.75V fixed output variant before integration into designs.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component for applications requiring precise voltage regulation with minimal power loss. The low quiescent current and ultra-low noise characteristics make it suitable for sensitive analog and RF circuits. Verify that the input voltage remains within the specified operating range to maintain stability and prevent excessive power dissipation in the small SOT-23 package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the MIC5255 series of 150mA Low Noise µCap CMOS LDO regulators. The series is designed for handheld and battery-powered devices, offering high accuracy and extremely low dropout voltages. The BM5 suffix specifically denotes the standard 5-pin SOT-23 package configuration within the product family.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes include other MIC5255 variants with different output voltages but identical packages, such as MIC5255-3.3BM5 or MIC5255-5.0BM5, provided the voltage requirement changes. Cross-brand replacements require matching the 150mA current rating, SOT-23-5 footprint, and low-noise specifications.