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MIC39500-2.5BT
Microchip Technology
IC REG LINEAR 2.5V 5A TO220-3
1297 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 5A TO-220-3
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5.0 / 5.0
- (475 Ratings)
MIC39500-2.5BT
Product Overview
1312586
DiGi Electronics Part Number
MIC39500-2.5BT-DGManufacturer
Microchip Technology
MIC39500-2.5BT
Description
IC REG LINEAR 2.5V 5A TO220-3Inventory
1297 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 5A TO-220-3
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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MIC39500-2.5BT Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
-
Series
-
Product Status
Obsolete
Output Configuration
Positive
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
16V
Voltage - Output (Min/Fixed)
2.5V
Voltage - Output (Max)
-
Voltage Dropout (Max)
0.575V @ 5A
Current - Output
5A
PSRR
-
Control Features
-
Protection Features
Over Current, Over Temperature, Reverse Polarity
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-3
Supplier Device Package
TO-220-3
Base Product Number
MIC39500
Datasheet & Documents
HTML Datasheet
MIC39500-2.5BT-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Standard Package
50
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
웹사이트의 모바일 최적화 덕분에 스마트폰에서도 쉽게 쇼핑할 수 있었어요.
de desembre 02, 2025
Shopping here is convenient, with a clean interface and great prices.
de desembre 02, 2025
The company's focus on safety packaging ensures that all products arrive intact and ready to use.
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Frequently Asked Questions (FAQ)
Can the MIC39500-2.5BT be safely used as a drop-in replacement for the LM3940ISX-3.3 in a 3.3V-to-2.5V power rail design, and what thermal or stability risks should I consider?
The MIC39500-2.5BT is not a direct drop-in replacement for the LM3940ISX-3.3 due to differing output voltages (2.5V vs. 3.3V) and input voltage ranges. However, if your system already requires a 2.5V rail, the MIC39500-2.5BT can replace older 2.5V regulators like the LM1084-2.5 with better thermal performance in TO-220 packaging. Key risks include higher power dissipation at high input voltages (e.g., 12V input yields ~2.5W at 5A), requiring a proper heatsink. Unlike the LM3940, the MIC39500-2.5BT lacks built-in output discharge or soft-start, which may cause latch-up in FPGA or ASIC power-up sequences—add a bleed resistor or sequencing controller if used with sensitive loads.
What are the critical layout and thermal management considerations when designing with the MIC39500-2.5BT in a high-current (4–5A) industrial application operating near its 125°C junction limit?
When operating the MIC39500-2.5BT near 5A in industrial environments, thermal resistance from junction to ambient (θJA) becomes critical. Even with a TO-220 package, θJA can exceed 60°C/W without a heatsink, leading to thermal shutdown at moderate ambient temperatures. Use a low-θJC heatsink (<2°C/W) and thermal interface material, and ensure adequate copper pour on the PCB for heat spreading. Avoid placing heat-sensitive components nearby. Also, minimize trace inductance on the input and output to reduce voltage spikes during load transients—this regulator lacks active transient response features, so output capacitance (≥10µF low-ESR ceramic + bulk electrolytic) is essential to maintain stability under dynamic loads.
Is the MIC39500-2.5BT suitable for automotive 12V battery systems where load dump transients can exceed 40V, and how can I protect it without compromising regulation accuracy?
The MIC39500-2.5BT has a maximum input voltage of 16V, making it unsuitable for direct connection to automotive 12V rails exposed to load dump events (which can reach 40–60V). To use it safely, add a pre-regulator or TVS diode (e.g., SMAJ15A) followed by an LC filter to clamp input transients below 16V. Alternatively, consider a wider-input regulator like the MIC29500-2.5WT (up to 26V input) as a more robust substitute. Bypassing the input with a 100nF ceramic capacitor close to the pin is also critical to suppress high-frequency noise from the vehicle’s electrical system, which could otherwise couple into sensitive downstream logic.
Since the MIC39500-2.5BT is marked obsolete, what are the most reliable second-sourcing or upgrade paths, and how do alternatives like the MIC39500-2.5WT differ in real-world performance?
With the MIC39500-2.5BT now obsolete, the recommended migration path is to the MIC39500-2.5WT, which offers identical electrical performance but comes in a surface-mount D²PAK (TO-263) package, enabling modern assembly processes. The WT version has slightly higher thermal resistance (θJA ≈ 40°C/W vs. ~50°C/W for TO-220 with heatsink), so ensure adequate PCB copper area for heat dissipation. Both share the same dropout voltage (0.575V @ 5A) and protection features, but the WT variant is more readily available and RoHS-compliant. Avoid counterfeit parts by sourcing only from authorized distributors; verify date codes and packaging authenticity, especially since the original BT version is no longer in production.
Can the MIC39500-2.5BT be paralleled with another linear regulator to increase output current beyond 5A, and what balancing techniques are effective without introducing oscillation or current hogging?
Paralleling the MIC39500-2.5BT with another identical unit is not recommended without active current sharing due to tight output voltage tolerances and lack of built-in ballast or sense pins. Small mismatches in output voltage (even ±2%) can cause one regulator to carry most of the load, leading to thermal runaway. If higher current is needed, use a single higher-current regulator like the MIC39100-2.5BS (10A, adjustable) or switch to a synchronous buck converter (e.g., MCP1501-based design) for better efficiency. If paralleling is unavoidable, insert 0.1–0.2Ω ballast resistors in series with each output and use a common heatsink to thermally couple devices—but this reduces efficiency and increases dropout voltage, negating many advantages of linear regulation.
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MIC39500-2.5BT CAD Models
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