MIC5157BM

Overview

The MIC5157BM is a Super LDO regulator controller manufactured by Microchip Technology. It operates within an input voltage range of 3 V to 36 V and provides selectable fixed output voltages of 3.3 V, 5 V, or 12 V. The device features a single output with a maximum output current of 4.5 mA. It is designed for industrial temperature applications, functioning reliably between -40°C and +85°C. The component is housed in a 14-lead SOIC surface-mount package.

Feature Summary

• Regulator-selectable architecture allowing configuration for specific fixed output voltages
• Wide input voltage capability supporting high-voltage supply rails up to 36 V
• Low quiescent current operation suitable for power-sensitive designs

Applications

• Industrial control systems requiring stable low-dropout regulation
• Embedded systems utilizing high-voltage input sources
• Power management circuits in consumer electronics

Procurement Notes

Verify the exact suffix against official Microchip documentation to confirm pinout compatibility and thermal characteristics. Ensure the selected variant matches the required output voltage selection pins. Confirm RoHS compliance status through the manufacturer's latest datasheet before finalizing procurement specifications.

Selection Notes

Select this component when a wide input voltage range is required alongside a precise fixed output. Consider the SOIC-14 package constraints for PCB layout. Evaluate the 4.5 mA output limit against load requirements. Verify that the external pass transistor supports the intended current and voltage levels for the application.

Part Context

The MIC5157 belongs to the Super LDO family, which integrates a controller with an external N-channel pass transistor. This design enables high efficiency and low dropout voltage compared to traditional PNP-based regulators. The series offers flexibility in output voltage selection through external resistor networks or internal configurations.

Replacement Considerations

MIC5157YM-TR: Surface mount alternative with reel packaging.