MIC5158BM

Overview

The MIC5158BM is a Super LDO Regulator Controller manufactured by Microchip Technology, housed in a 14-pin SOIC package. It operates within a supply voltage range of 3V to 36V and supports an operating temperature range from -40°C to +85°C. The device features an internal charge pump tripler for gate drive generation and offers a typical operating current of 4.5mA with less than 1µA shutdown current. It provides a fixed 5V output or adjustable output from 1.3V to 36V via external resistors, includes a 35mV current limit threshold, and incorporates an open-collector flag output.

Feature Summary

• Internal charge pump tripler generates gate drive voltage without external supplies
• Configurable as fixed 5V or adjustable regulator using two external resistors
• Constant-current limiting with a 35mV threshold across an external sense resistor
• Open-collector flag output signals when output voltage drops below nominal

Applications

• Ultrahigh current ultralow dropout voltage regulators
• Low noise or low-dropout SMPS post regulators
• High-current, current-limited high-side switches
• Battery charger constant-current applications

Procurement Notes

Verify the specific suffix 'BM' corresponds to the 14-pin SOIC package variant. Confirm RoHS compliance status as datasheets may list variations between standard and Pb-Free versions. Ensure the ordering code matches the required temperature grade and configuration (fixed vs. adjustable). Cross-reference the manufacturer's latest documentation for any pinout or electrical characteristic updates.

Selection Notes

Select this controller when an internal charge pump is required to drive logic-level MOSFETs directly from the input supply. It is suitable for designs needing precise current limiting or fault detection via the flag pin. Consider the 14-pin SOIC footprint constraints and ensure adequate thermal management for the chosen application environment.

Part Context

This component belongs to the MIC5156/5157/5158 family of Super LDO Regulator Controllers. While the MIC5156 requires an external gate drive supply and the MIC5157 offers selectable fixed voltages, the MIC5158 specifically combines the internal charge pump with flexible fixed 5V or fully programmable output capabilities.

Replacement Considerations

MIC5158YM

FAQ

How is the output voltage configured on the MIC5158?

The MIC5158 can be set to a fixed 5V output by connecting the 5V FB pin to the EA pin, or it can be programmed for any voltage between 1.3V and 36V using two external resistors connected to the EA pin.

What is the function of the FLAG pin?

The FLAG pin is an open-collector output that goes active (low) when the output voltage falls more than 8% below its nominal value, indicating an out-of-regulation condition.