MIC2937A-5.0BU TR

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

The MIC2937A-5.0BU TR is a fixed-output low-dropout voltage regulator from the MIC2937A family, manufactured by Micrel (now Microchip Technology). It provides a nominal 5.0V output with a guaranteed maximum continuous current of 750mA. The device operates within an input supply range of 2V to 26V and features a junction temperature range of –40°C to +125°C. It utilizes a TO-263-3 surface-mount package. Key electrical characteristics include a typical dropout voltage of 370mV at full load, a line regulation of 0.03% to 0.10%, and a load regulation of 0.04% to 0.16%. The quiescent ground pin current is typically 160µA.

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

• Provides high output voltage accuracy with extremely tight line and load regulation specifications across the operating temperature range.
• Features robust protection mechanisms including fold-back current limiting, thermal shutdown, and immunity to reverse battery connections up to -20V.
• Capable of withstanding automotive load dump conditions with positive transients up to +60V while maintaining operation in low dropout scenarios.

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

• Battery powered equipment requiring extended operational life due to low quiescent current
• Automotive electronics subject to harsh transient voltage environments
• Cellular telephones and portable computing devices such as laptops and palmtops
• PCMCIA VCC and VPP regulation or switching applications

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

Verify that the ordering suffix 'TR' corresponds to the specific reel packaging configuration required for automated assembly processes. Confirm that the component source is recognized as Micrel or its successor entity, Microchip Technology, to ensure datasheet alignment. Check for RoHS compliance status regarding high-melting solder exemptions if environmental regulations apply to the target deployment region.

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

Select this component when a fixed 5V rail is needed with moderate current demands up to 750mA. The TO-263-3 package offers efficient thermal dissipation for surface-mount layouts. Ensure the application input voltage remains within the 2V to 26V window and consider the minimum load requirement of 5mA for stable regulation during light-load conditions.

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

This part belongs to the MIC2937A/29371/29372 family of 750mA low-dropout regulators originally developed by Micrel, Inc. The MIC2937A designation specifically identifies the three-pin fixed-voltage variant, distinct from the adjustable MIC29372 or the error-flag enabled MIC29371. The family is characterized by 'bulletproof' design capabilities suitable for demanding power management environments.

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

MIC2937A-5.0WU

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

What is the minimum load current required for the MIC2937A-5.0BU TR to maintain regulation?

The regulator requires a minimum load current of 5mA to remain in regulation. If the external load draws less than this, additional biasing may be necessary to prevent output voltage drift.

How does the MIC2937A handle reverse battery connections?

The device is designed to withstand reverse battery conditions, tolerating negative transients down to -20V on the input supply without sustaining damage.