MIC5253-2.85BC5 TR

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

The MIC5253-2.85BC5 TR is a fixed-output low-dropout linear regulator manufactured by Micrel, providing a stable 2.85V output with a maximum continuous current of 100mA and peak capability of 150mA. It operates within an input voltage range of 2.7V to 5.5V and maintains high accuracy with ±1.5% initial tolerance and ±3.0% over temperature. The device features ultra-low noise performance at 30µV(rms) and extremely low dropout voltage of 165mV at full load. Designed for handheld applications, it includes a TTL-compatible enable pin, thermal shutdown, and current limit protection.

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

• Ultra-low noise output optimized for RF applications
• TTL-logic-controlled enable input for zero off-mode current
• Stability with low-ESR ceramic capacitors
• 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 manufacturer origin as this component was originally produced by Micrel before acquisition by Microchip Technology. Confirm that the 'TR' suffix indicates tape-and-reel packaging and matches the specific SC-70-5 package designation. Ensure the part number aligns with the 2.85V fixed output variant and check for any updated datasheet revisions or marking changes post-acquisition.

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

Select this regulator when a clean power supply is required for sensitive RF circuits in battery-operated devices. It is suitable for designs requiring minimal board space due to its Teeny SC-70-5 package. Consider the 100mA continuous current limit and 165mV dropout voltage for efficiency calculations. The active shutdown feature makes it ideal for systems requiring extended battery life through deep sleep modes.

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

This component belongs to the MIC5253 series of µCap Teeny LDO regulators designed for ultra-low-noise applications. Unlike the MIC5252 which offers higher PSRR, the MIC5253 focuses on minimizing output noise and physical footprint. It shares similar protection features like thermal shutdown but is distinct from the MIC5255 series which supports higher currents up to 150mA continuously.

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

MIC5253-2.85YC5

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

How does the enable pin function?

The enable pin is active-high and CMOS compatible. Driving it low disables the regulator into a zero off-mode current state, while driving it high enables the output.

What capacitor values are recommended for stability?

A 1.0µF ceramic capacitor is required on both the input and output pins. A 0.01µF capacitor is recommended on the bypass pin to further reduce output noise.

Is the device stable without a load?

Yes, the MIC5253 remains stable and in regulation with no load, which is beneficial for CMOS RAM keep-alive applications.