MIC5158YN

Overview

The MIC5158YN is a Super LDO Regulator Controller manufactured by Microchip Technology, housed in a 14-pin DIP package. It operates within an input voltage range of 3V to 36V and supports an adjustable output voltage from 1.3V to 36V using two external resistors, or a fixed 5V configuration. The device features an internal charge pump tripler for gate drive generation, a typical operating current of 4.5mA, and a shutdown current below 1µA. It includes an optional current limit with a 35mV threshold and an open-collector flag output.

Feature Summary

• Internal charge pump tripler generates gate drive voltage without external supplies
• Configurable as fixed 5V or programmable via external resistors
• Open-collector flag output signals out-of-regulation conditions
• TTL-compatible enable pin controls active and shutdown states

Applications

• Ultrahigh current ultralow dropout voltage regulators
• Constant high-current sources
• Low noise post regulators for switch-mode power supplies
• High-current current-limited switches
• Battery charger constant-current applications

Procurement Notes

Verify the component matches the specific 14-pin DIP package designation. Confirm that the ordering suffix aligns with the required temperature range and lead-free status. Ensure the datasheet version corresponds to the intended design specifications before finalizing procurement orders.

Selection Notes

Select this controller when an internal charge pump is required to drive the external N-channel MOSFET gate. It is suitable for designs needing either a fixed 5V output or a wide-range adjustable output up to 36V. Consider the 14-pin DIP footprint if through-hole mounting is necessary for the application.

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 provides flexibility with a fixed 5V option or full adjustability. All variants share similar protection features and control logic.

Replacement Considerations

MIC5158YM is the surface-mount equivalent in SOIC-14 packaging.

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 to any voltage between 1.3V and 36V using an external resistive divider connected to the EA pin.

What is the function of the FLAG pin?

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