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MIC29201-12BU
Microchip Technology
IC REG LINEAR 12V 400MA TO263-5
3615 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 400mA TO-263-5
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5.0 / 5.0
- (114 Ratings)
MIC29201-12BU
Product Overview
1319750
DiGi Electronics Part Number
MIC29201-12BU-DGManufacturer
Microchip Technology
MIC29201-12BU
Description
IC REG LINEAR 12V 400MA TO263-5Inventory
3615 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 400mA TO-263-5
Quantity
Minimum 1
Minimum 1
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MIC29201-12BU 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)
26V
Voltage - Output (Min/Fixed)
12V
Voltage - Output (Max)
-
Voltage Dropout (Max)
0.75V @ 400mA
Current - Output
400mA
Current - Quiescent (Iq)
300 µA
Current - Supply (Max)
12 mA
PSRR
-
Control Features
Enable
Protection Features
Load Dump, Over Current, Reverse Polarity
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package
TO-263-5
Base Product Number
MIC29201
Datasheet & Documents
HTML Datasheet
MIC29201-12BU-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
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)
Dec 02, 2025
他們的物流效率很高，經常能準時或提前收到商品，售後支援又非常貼心，整體體驗很佳。
Dec 02, 2025
DiGi Electronics的客服人員態度熱情，解答問題時非常詳細，讓我感受到貼心的服務。
Dec 02, 2025
對於售後服務的反應速度我真的非常讚賞，每次遇到問題都能迅速得到協助！
Dec 02, 2025
DiGi Electronics' affordability doesn’t mean compromising on sophistication or performance.
Dec 02, 2025
I appreciate how they stand by their products with solid support.
Dec 02, 2025
Thanks to their swift shipping, I received my electronics in perfect condition, ready to use.
Dec 02, 2025
Fast shipping and excellent service — I am very satisfied with DiGi Electronics’s support.
Dec 02, 2025
The quick shipping options available here make shopping stress-free. Prices are very attractive, too.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the MIC29201-12BU in a high-temperature automotive environment?
When designing the MIC29201-12BU into high-temperature automotive systems, the primary risk is thermal overstress due to its high dropout voltage (0.75V @ 400mA) and TO-263-5 package with limited thermal dissipation. At ambient temperatures up to 125°C, power dissipation from VIN-VOUT differentials over 5V can push junction temperatures beyond limits. To mitigate, ensure robust PCB copper layout for heatsinking the tab, derate load current accordingly, and consider active cooling if VIN exceeds 18V. Also verify long-term reliability under thermal cycling, especially given the part's obsolete status and potential for end-of-life supply disruptions.
Can the MIC29201-12BU replace the MIC29201-12WU in an existing design without circuit modifications?
Yes, the MIC29201-12BU can generally replace the MIC29201-12WU without circuit changes, as both share identical electrical specifications, output voltage (12V fixed), current rating (400mA), and package footprint (TO-263-5). However, verify availability and longevity: the MIC29201-12BU is marked as obsolete, increasing supply chain risk. Additionally, confirm that your assembly process supports MSL-3 moisture sensitivity handling, as unprotected exposure to humidity before soldering could lead to popcorning during reflow, especially in high-reliability automotive or industrial applications.
How does the MIC29201-12BU handle load dump and reverse polarity events in automotive power systems?
The MIC29201-12BU integrates protection against load dump, overcurrent, and reverse polarity, making it suitable for harsh automotive environments. During load dump transients (e.g., battery disconnect while alternator is charging), the device’s internal clamping prevents damage from voltage spikes up to its 26V input max rating. Reverse polarity protection ensures no reverse current flows if the input is accidentally connected backward. However, for severe ISO 7637-2 load dump events exceeding 26V, external transient voltage suppression (TVS) diodes are still required upstream to protect the MIC29201-12BU from catastrophic failure.
What are the trade-offs of using the MIC29201-12BU instead of a switching regulator in a 12V, 400mA automotive power rail?
Using the MIC29201-12BU instead of a switching regulator simplifies design with fewer external components and low noise output, ideal for sensitive analog or sensor circuits. However, the trade-off is poor efficiency under high input-output differentials. For example, with VIN = 24V and VOUT = 12V at 400mA, power loss is (24–12)*0.4 = 4.8W, requiring substantial thermal management. A switching regulator would achieve >85% efficiency in this case, minimizing heat. Reserve MIC29201-12BU for low-noise, low-EMI applications where thermal design can accommodate losses.
What reliability concerns should be considered when sourcing the MIC29201-12BU given its obsolete status and RoHS non-compliance?
The obsolete status of the MIC29201-12BU poses long-term reliability risks due to potential counterfeit parts and supply discontinuation. Since it's RoHS non-compliant, use in new commercial or consumer designs may violate environmental regulations like EU RoHS or China RoHS. For legacy or end-of-life systems, mitigate risks by sourcing only from franchised distributors or certified suppliers with traceable lot codes. Perform incoming inspection for authenticity and consider building buffer stock. Evaluate redesigning with a pin-compatible, RoHS-compliant alternative as a future-proof strategy, though none are currently listed as direct substitutes.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
MIC29201-12BU CAD Models
Microchip Technology MIC29201-12BU PCB symbols & footprints
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