MIC5157YM-TR

Overview

The MIC5157YM-TR is a Super LDO Regulator Controller in a 14-pin SOIC package, operating from -40°C to +85°C. It features an internal charge pump tripler for gate drive, eliminating the need for external supply voltage. The device supports selectable fixed output voltages of 3.3V, 5.0V, or 12V via pin configuration. It operates with a supply voltage range of 3V to 36V and includes an active-low open-collector flag for out-of-regulation detection. Current limiting is achieved using an optional external sense resistor with a typical threshold of 35mV.

Feature Summary

• Internal charge pump tripler generates gate drive voltage for external N-channel MOSFETs
• Selectable fixed output configurations for 3.3V, 5.0V, or 12V operation
• Active-low open-collector flag signals output voltage deviation below nominal levels
• TTL-compatible enable control allows shutdown mode with minimal standby current consumption

Applications

• Ultrahigh current ultralow dropout voltage regulators
• Low parts count computer power supplies stepping down from 5.0V to 3.3V
• Post regulators for low noise switch-mode power supplies
• High-current constant current sources and switches

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure the selected variant matches the required output voltage configuration pins. Confirm that the component meets all environmental and electrical specifications defined in the datasheet before integration into the design.

Selection Notes

Select this controller when an internal gate drive solution is preferred over external supplies. It is suitable for applications requiring fixed outputs of 3.3V, 5V, or 12V. Consider the internal charge pump requirements for capacitor selection. Verify that the external MOSFET logic level compatibility aligns with the available gate drive voltage generated by the tripler circuit.

Part Context

This component belongs to the MIC5156/5157/5158 family of Super LDO Regulator Controllers manufactured by Micrel, now part of Microchip Technology. The family provides single IC solutions for high-current linear regulation using external N-channel MOSFETs. The MIC5157 specifically distinguishes itself with an integrated charge pump and selectable fixed output options.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.