MIC5156-5.0YN

Overview

The MIC5156-5.0YN is a Super LDO Regulator Controller manufactured by Microchip Technology, housed in an 8-pin DIP package. It provides a fixed 5.0V output with an operating temperature range of -40°C to +85°C. The device operates from a supply voltage (VDD) between 3V and 36V. It requires an external N-channel power MOSFET as the linear pass element and an external gate drive supply (VP). Key electrical characteristics include a typical operating current of 4.5mA, a shutdown current below 1µA, and a current limit threshold of 35mV.

Feature Summary

• Fixed 5.0V output configuration for simplified design
• Requires external N-channel MOSFET and gate drive supply
• Internal current limiting at 35mV threshold
• Open-collector flag output for out-of-regulation detection

Applications

• Ultrahigh current ultralow dropout voltage regulator
• Constant high-current source
• Low parts count 5.0V to 3.3V computer supply
• High-current, current-limited switch

Procurement Notes

Verify that the specific part number MIC5156-5.0YN corresponds to the 8-pin DIP package variant. Confirm the manufacturer origin, as this component was originally developed by Micrel before acquisition by Microchip Technology. Ensure the external gate drive supply circuitry matches the controller's requirements for proper operation.

Selection Notes

Select this controller when a fixed 5.0V output is required without external programming resistors. It is suitable for applications needing high current capability defined by the external MOSFET selection. Note that unlike other family members, this version lacks an internal charge pump and mandates an external VP supply pin connection for gate enhancement.

Part Context

This component belongs to the MIC5156/5157/5158 Super LDO Regulator Controller family. While the MIC5157 and MIC5158 feature internal charge pumps for gate drive, the MIC5156 relies on an external VP supply. This distinction makes the MIC5156 unique within the series regarding gate drive architecture and pinout configuration.

Replacement Considerations

MIC5156-5.0BN

FAQ

Does the MIC5156-5.0YN have an internal charge pump?

No, the MIC5156 does not have an internal charge pump. It requires an external gate drive supply voltage applied to the VP pin.

How is the output voltage set on the MIC5156-5.0YN?

The output voltage is internally fixed at 5.0V and does not require external resistive dividers for setting.