MIC2951-02YM-TR

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

The MIC2951-02YM-TR is a 150mA low-dropout voltage regulator in an 8-pin SOIC package. It provides a fixed 5V output with ±0.5% accuracy and operates within a junction temperature range of –40°C to +125°C. The device features extremely low quiescent current, tight line and load regulation, and very low temperature coefficients. It includes logic-controlled shutdown and an error flag output that warns of output dropout. The regulator can withstand unregulated DC input transients up to +60V positive and –20V reverse battery conditions.

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

• Logic-controlled electronic shutdown for system power management
• Error flag output warns of output dropout due to failing batteries or overvoltage
• Survives negative transients up to 20V below ground and positive transients up to 60V
• Extremely low quiescent current that increases only slightly during dropout

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

• Automotive electronics
• Avionics
• Battery powered equipment
• Voltage reference
• SMPS post-regulator

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

Verify the specific ordering suffix against official Microchip documentation to confirm package type, lead finish, and temperature grade. Confirm RoHS compliance status as manufacturing processes may evolve. Ensure the supplier source is authorized to guarantee component authenticity and traceability. Check for any recent product change notifications regarding packaging or material composition updates.

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

Select this part when a fixed 5V output with high precision is required alongside robust transient protection. The MIC2951-02YM-TR is suitable for designs needing logic-controlled shutdown and early warning of input failure via the error flag. Consider the 8-pin SOIC package constraints and ensure adequate thermal dissipation for the application environment.

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

The MIC2951 series is pin-for-pin compatible with the LP2951 but offers improved performance including lower dropout voltage and higher output current. It serves as a successor to older micropower regulators, adding automotive-grade protections like reverse battery and load dump survival. The -02 variant specifically denotes a 5V output with tighter initial tolerance compared to the -03 version.

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

MIC2951-03YM-TR (1.0% accuracy)

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

How does the error flag function?

The error flag produces a logic low output whenever the regulator output falls out of regulation by more than approximately 5%, indicating issues such as low input voltage or current limiting.

What stability requirements exist for external capacitors?

A minimum capacitance of 1.5µF is required between the output and ground to prevent oscillations. Lower values may be used at reduced load currents, but larger values are needed for lower programmed output voltages.