MIC5156-3.3YM

Voltage Regulators - Linear Regulator Controllers Overview

The MIC5156-3.3YM is a Super LDO Regulator Controller manufactured by Microchip Technology, housed in an 8-pin SOIC package. It provides a fixed 3.3V output and operates within a supply voltage range of 3V to 36V. The device requires an external N-channel MOSFET as the pass element and utilizes an external gate drive supply (VP) for enhancement. Key electrical parameters include a typical operating current of 4.5mA, a shutdown current below 1µA, and a current limit threshold of 35mV.

Voltage Regulators - Linear Regulator Controllers Feature Summary

• Fixed 3.3V output configuration with internal resistive divider
• Requires external gate drive supply for N-channel MOSFET control
• Open-collector flag output indicates out-of-regulation conditions
• TTL-compatible enable pin for active-low shutdown

Voltage Regulators - Linear Regulator Controllers Applications

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

Voltage Regulators - Linear Regulator Controllers Procurement Notes

Verify that the specific part number MIC5156-3.3YM matches the required 8-pin SOIC package and fixed 3.3V output specification. Confirm compatibility with the system's external gate drive supply requirements, as this controller does not contain an internal charge pump unlike other family members. Ensure the design includes necessary external components such as the sense resistor and bypass capacitors.

Voltage Regulators - Linear Regulator Controllers Selection Notes

Select this component when a fixed 3.3V output is required and an external gate drive supply is available or already present in the system. It is suitable for applications demanding low standby current and precise output regulation. Consider alternative models like the MIC5157 if an internal charge pump is preferred to eliminate the need for an external VP supply.

Voltage Regulators - Linear Regulator Controllers 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 pin for MOSFET enhancement. This distinction makes the MIC5156 smaller but dependent on external circuitry for gate voltage generation.

Voltage Regulators - Linear Regulator Controllers Replacement Considerations

MIC5156-3.3BM

Voltage Regulators - Linear Regulator Controllers FAQ

Does the MIC5156-3.3YM have an internal charge pump?

No, the MIC5156 requires an external gate drive supply connected to the VP pin to drive the external MOSFET.

How is the output voltage configured?

The MIC5156-3.3YM has a fixed 3.3V output determined by an internal resistive divider; no external feedback resistors are needed.