MIC5366-1.2YMT-TZ Equivalent & Substitute Parts

Part Overview

The MIC5366-1.2YMT-TZ is a linear voltage regulator IC from Microchip Technology designed for positive fixed 1.2V output applications with 150mA current capacity. This surface mount component operates across -40°C to 125°C and features integrated over-current and over-temperature protection. The part is currently in active production status with 716 units in stock.

Substitute parts are necessary when the original MIC5366-1.2YMT-TZ becomes unavailable, when design requirements demand higher output current capacity, or when alternative package configurations better suit manufacturing constraints.

Substiute Parts

MIC5366-1.2YMT-TZ

Microchip TechnologyIn Stock: 803MIC5366-1.2YMT-TZ Datasheet

Current PartRFQ

BU12UA3WNVX-TL

Rohm SemiconductorIn Stock: 4883BU12UA3WNVX-TL Datasheet

MFR RecommendedRFQ

NCV8170AMX120TCG

onsemiIn Stock: 5814NCV8170AMX120TCG Datasheet

MFR RecommendedRFQ

NCV8170BMX120TCG

onsemiIn Stock: 1032NCV8170BMX120TCG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC5366-1.2YMT-TZ is determined by the following critical parameters:

Primary Substitution Criteria:

• Output voltage fixed at 1.2V
• Input voltage maximum of 5.5V
• Positive output configuration
• Single regulator output
• Surface mount technology
• Enable control feature
• Over-current and over-temperature protection

Secondary Compatibility Factors:

• Output current capacity (minimum 150mA required for direct substitution)
• Operating temperature range (-40°C to 125°C minimum)
• Package form factor compatibility
• Voltage dropout characteristics
• Quiescent current specifications

The substitute parts listed maintain the core electrical specifications while offering variations in output current capacity, package geometry, and thermal performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

NCV8170AMX120TCG and NCV8170BMX120TCG (onsemi): These parts are preferred substitutes for new designs. Both maintain identical output voltage and current specifications as the MIC5366-1.2YMT-TZ while offering superior quiescent current performance (0.9 µA versus 39 µA). Both are qualified to AEC-Q100 automotive standards and remain in active production status. Operating temperature range matches the original part (-40°C to 125°C). Package geometry differs (4-XDFN versus 4-TMLF®), requiring PCB layout verification.

BU12UA3WNVX-TL (Rohm Semiconductor): This substitute provides doubled output current capacity (300mA versus 150mA) and is suitable for applications requiring higher current delivery. However, this part carries "Not For New Designs" status and operates only to 85°C maximum temperature, making it unsuitable for applications requiring the full -40°C to 125°C range. Use only when higher current capacity is mandatory and thermal constraints permit.

Frequently Asked Questions (FAQ)

Q: Can NCV8170AMX120TCG directly replace MIC5366-1.2YMT-TZ on existing PCBs? A: Direct PCB replacement requires verification of package footprint compatibility. The MIC5366-1.2YMT-TZ uses 4-TMLF® packaging while NCV8170AMX120TCG uses 4-XDFN packaging. Both are 4-pin surface mount components with exposed pads, but pin spacing and pad dimensions differ. Layout redesign may be necessary.

Q: What is the significance of the "Not For New Designs" status on BU12UA3WNVX-TL? A: This designation indicates the manufacturer is discontinuing the part for new applications. While existing inventory remains available, long-term supply cannot be guaranteed. New designs should use NCV8170AMX120TCG or NCV8170BMX120TCG instead.

Q: How do quiescent current differences affect circuit performance? A: The NCV8170 series exhibits significantly lower quiescent current (0.9 µA) compared to MIC5366-1.2YMT-TZ (39 µA). In battery-powered or low-power standby applications, this 43-fold reduction directly decreases idle power consumption. The MIC5366 maintains higher PSRR performance (80dB ~ 65dB versus 63dB ~ 57dB), which may be critical in noise-sensitive analog circuits.

Q: Are all substitute parts RoHS3 compliant? A: Yes. MIC5366-1.2YMT-TZ, BU12UA3WNVX-TL, NCV8170AMX120TCG, and NCV8170BMX120TCG are all ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: What temperature range limitations apply to BU12UA3WNVX-TL? A: BU12UA3WNVX-TL operates from -40°C to 85°C maximum, compared to -40°C to 125°C for the original MIC5366-1.2YMT-TZ. Applications requiring operation above 85°C must use NCV8170AMX120TCG or NCV8170BMX120TCG.