MIC5157BM-TR

Overview

The MIC5157BM-TR is a Super LDO Regulator Controller manufactured by Microchip Technology, housed in a 14-pin SOIC package. It operates within an ambient temperature range of -40°C to +85°C and accepts supply voltages from 3V to 36V. The device features selectable fixed output voltages of 3.3V, 5.0V, or 12V. Typical operating current is 4.5mA, with standby current below 1µA. An internal charge pump tripler provides gate drive voltage for external N-channel MOSFETs.

Feature Summary

• Internal charge pump tripler generates gate drive voltage for external power MOSFETs
• Selectable fixed output configurations for 3.3V, 5.0V, or 12V via pin connection
• Open-collector flag output signals when regulation drops more than 8% below nominal
• TTL-compatible enable control allows shutdown mode with minimal supply current

Applications

• Ultrahigh current ultralow dropout voltage regulators
• Low parts count computer power supplies (e.g., 5.0V to 3.3V)
• Post-regulators for low noise switch-mode power supplies
• High-current constant current sources

Procurement Notes

Verify the specific suffix 'BM' corresponds to the 14-pin SOIC package and industrial temperature grade (-40°C to +85°C). Confirm that the '-TR' designation indicates tape-and-reel packaging as required for automated assembly processes. Cross-reference the manufacturer part number against official Microchip documentation to ensure compatibility with intended PCB layout and thermal requirements.

Selection Notes

Select this controller when a single IC solution is needed for high-current linear regulation using an external pass element. The internal charge pump eliminates the need for an external gate drive supply, simplifying the bill of materials. Ensure the application requires one of the three selectable fixed outputs rather than an adjustable range, which would necessitate the MIC5158 variant.

Part Context

This component belongs to the MIC5156/5157/5158 family of Super LDO Regulator Controllers. Unlike the MIC5156, which requires an external gate drive supply, the MIC5157 integrates a charge pump tripler. It differs from the MIC5158, which offers adjustable output capabilities. The family utilizes external N-channel MOSFETs as the linear pass element to achieve low dropout performance.

Replacement Considerations

MIC5157YM-TR