MIC5159-1.8YM6-TR

Overview

The MIC5159-1.8YM6-TR is a precision-voltage regulator controller from Microchip Technology, packaged in an SOT-23-6 housing. It operates with an input voltage range of 1.65V to 5.5V and provides a fixed output voltage of 1.8V. Designed for use with external P-Channel MOSFETs, it forms a low-dropout regulator capable of driving high currents up to 10A. The device features fast transient response, logic-controlled shutdown via an enable pin, and programmable current limit protection. It maintains stability with ceramic output capacitors and functions within a junction temperature range of –40°C to +125°C.

Feature Summary

• Provides a fixed 1.8V output with ±1.0% initial tolerance
• Features logic-controlled shutdown and programmable current limit protection
• Ensures stability when used with ceramic output capacitors
• Capable of driving high output currents up to 10A

Applications

• Ultra-high current, ultra-low dropout voltage regulators
• Low-voltage distributed power systems
• Fixed telecom equipment power supplies
• Multimedia and PC power supplies
• Battery chargers

Procurement Notes

Verify the component matches the specific fixed 1.8V output variant, as the MIC5159 family includes adjustable versions. Confirm the SOT-23-6 package type and ensure the ordering suffix corresponds to the tape-and-reel configuration required for automated assembly processes. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and revision status before procurement.

Selection Notes

Select this controller when designing a two-chip LDO solution requiring high efficiency and precise voltage regulation. Ensure the external P-Channel MOSFET selection accounts for thermal dissipation and on-resistance requirements based on the target load current. Verify that the input voltage rail falls within the specified 1.65V to 5.5V operating range to guarantee proper functionality and stability.

Part Context

This component belongs to the MIC5159 series of µCap LDO regulator controllers manufactured by Microchip Technology. The series offers both fixed and adjustable output voltage options in compact packages. The YM6 suffix indicates the SOT-23-6 surface-mount package variant designed for space-constrained applications requiring high performance and reliability in power management circuits.

Replacement Considerations

MIC5159BM6-TR

FAQ

Does the MIC5159-1.8YM6-TR require an external MOSFET?

Yes, the MIC5159 is a controller that must be used with an external P-Channel MOSFET to form a complete low-dropout regulator.

What is the function of the IS pin?

The IS pin serves as the current sense input. If the current limit feature is not utilized, it must be tied to the VIN pin.