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Microchip Technology MIC29150-12BU
- Part No.:
- MIC29150-12BU
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
MIC29150-12BU.pdf
- Description:
- IC REG LINEAR 12V 1.5A TO263-3
- Quantity:
- Payment:
- Shipping:
Inventory:380
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Product details
Overview
MIC29150-12BU from Microchip Technology is a 1.5A low-dropout linear regulator with fixed 12V output, 350mV dropout at full load, thermal shutdown and current limiting, used in industrial power rails requiring stable voltage under variable load.
For engineers reviewing the MIC29150-12BU datasheet, MIC29150-12BU pinout, MIC29150-12BU application, or MIC29150-12BU equivalent, key selection factors include dropout voltage at 1.5A, thermal performance in TO-263-5 package, input voltage range (4.5V to 26V), and integrated protection features for unregulated DC input systems.
Technical Context
The MIC29150-12BU employs PNP pass transistor architecture enabling ultra-low dropout operation. It integrates foldback current limiting and thermal shutdown with automatic recovery, supporting continuous operation up to 125°C junction temperature.
Designed for high-current, low-noise applications, it delivers 1.5A output with ≤0.02% line regulation and ≤0.2% load regulation across full operating conditions, and features 75µV RMS output noise without external bypass capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±2%, eliminating need for external feedback resistors in stable supply designs. |
| Max Output Current | 1.5A continuous, enabling direct replacement of legacy 1A LDOs in upgraded power stages. |
| Dropout Voltage | 350mV at 1.5A, allowing operation from 12.35V input when regulating 12V output. |
| Input Voltage Range | 4.5V to 26V, supporting wide-input industrial DC sources including 24V nominal bus systems. |
| Thermal Shutdown | Activates at 160°C junction temperature with hysteresis, preventing permanent damage during sustained overload. |
| Output Noise | 75µV RMS (10Hz–100kHz), suitable for analog sensor front-ends without additional filtering. |
Pinout & Package
Supplied in TO-263-5 (D2PAK) thermally enhanced surface-mount package with exposed metal tab for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply connection | Accepts 4.5V–26V unregulated DC; requires local 10µF ceramic input capacitor for stability. |
| GND | Ground reference | Common return path for input, output, and internal circuitry; must be low-impedance connection to thermal pad. |
| OUT | Regulated output | Delivers fixed 12V ±2%; requires 10µF ceramic output capacitor for transient response and stability. |
| SENSE | Output voltage sensing | Connects directly to load for remote sensing; enables compensation for PCB trace voltage drop up to 0.5V. |
| SHDN | Shutdown control | Active-low logic input; pulls output to high-impedance state when driven below 0.8V (max). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 350mV at 1.5A enables use with marginal input margins where standard LDOs fail. |
| Integrated protection | Thermal shutdown + foldback current limiting prevent fault propagation in overtemperature or short-circuit events. |
| Remote sense capability | SENSE pin supports Kelvin connection to load, maintaining ±2% regulation despite 500mV IR drop in power traces. |
| Low output noise | 75µV RMS noise allows direct powering of precision ADC references and op-amp supplies without post-regulation filtering. |
Applications
| Industrial PLC I/O Modules | Test & Measurement Equipment |
|---|---|
Use Scenario: Powering isolated analog input channels in modular PLC backplanes with 24V field-side supply. IC Role / Device Role / Timing Role: Primary 12V rail regulator delivering clean, stable voltage to 16-bit ADC drivers and signal conditioners. Use Value: 75µV RMS noise ensures <0.001% added noise floor degradation; remote sense maintains accuracy across 15cm PCB traces. | Use Scenario: Supplying precision DACs and reference buffers in portable multimeters and calibration sources. IC Role / Device Role / Timing Role: Low-noise 12V source for voltage reference ICs and op-amp bias rails. Use Value: Fixed 12V output eliminates resistor divider errors; 0.2% load regulation preserves absolute accuracy across battery discharge cycles. |
| Motor Drive Control Boards | Medical Diagnostic Sensors |
Use Scenario: Generating gate driver bias voltage from noisy 24V motor bus in servo amplifier control sections. IC Role / Device Role / Timing Role: Local 12V LDO for isolated gate driver ICs requiring tight voltage tolerance and fast transient response. Use Value: 350mV dropout allows regulation during 24V bus sag to 12.5V; thermal shutdown protects against MOSFET short-circuit faults. | Use Scenario: Powering photodiode transimpedance amplifiers and low-noise instrumentation amps in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Ultra-low-noise 12V supply for analog signal chain components sensitive to supply ripple. Use Value: 75µV RMS noise avoids signal-to-noise ratio degradation; SENSE pin compensates for flex-cable voltage drop in handheld probe assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM29150T-12/NOPB | Same 12V/1.5A spec but uses NPN pass element; 600mV dropout at 1.5A. | Higher dropout limits use in low-margin 12V input systems; no SENSE pin for remote sensing. | Select when thermal design accommodates higher dissipation and remote sensing is unnecessary. |
| TPS7A4701RGWR | Adjustable output (1.4V–20.5V), 1A max, 305mV dropout at 1A, 4.5µV RMS noise. | Lower noise but reduced current rating; requires external resistors for 12V setting; no integrated shutdown. | Select for ultra-low-noise <1A applications where programmability justifies added BOM cost and layout complexity. |
Compared with LM29150T-12/NOPB, MIC29150-12BU offers 250mV lower dropout and remote sensing-critical for margin-constrained industrial rails. Against TPS7A4701RGWR, it trades 4.5µV vs. 75µV noise for +50% current capacity and integrated protection, favoring robustness over extreme noise performance.
Availability
MIC29150-12BU is available at Aetrix Electronics and suitable for industrial automation, test equipment, and medical diagnostics requiring stable component supply with long-term manufacturability and consistent electrical performance.
Supply support for MIC29150-12BU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and communications markets.
The MIC29150 family targets high-current, low-dropout regulation in harsh environments, emphasizing thermal resilience, protection integration, and precision output stability for mission-critical power rails.
FAQ
What is the maximum input voltage rating for the MIC29150-12BU?
The MIC29150-12BU supports an absolute maximum input voltage of 26V. Operation above this level risks permanent damage to the internal PNP pass transistor and protection circuitry. For reliable long-term use, Microchip recommends limiting input to ≤24V in systems with transient spikes, and always pairing with appropriate input transient suppression.
Does the MIC29150-12BU require external capacitors, and if so, what values are specified?
Yes, the MIC29150-12BU requires both input and output capacitors for stability and transient response. Microchip specifies a minimum 10µF ceramic capacitor at the IN pin and a minimum 10µF ceramic capacitor at the OUT pin. X7R or better dielectric is recommended; tantalum capacitors are not advised due to ESR sensitivity.
How does the SENSE pin function on the MIC29150-12BU, and when should it be used?
The SENSE pin on the MIC29150-12BU provides remote voltage sensing at the load to compensate for PCB trace resistance. It should be used whenever output trace length exceeds 2 cm or voltage drop exceeds 25 mV. Connect SENSE directly to the load's 12V rail-never to the OUT pin-to maintain ±2% regulation accuracy under varying load currents.
What thermal derating applies to the MIC29150-12BU in TO-263-5 package at 1.5A output?
At 1.5A output and 25°C ambient, the MIC29150-12BU requires ≥12 cm² of 2-oz copper on the thermal pad for safe operation. Derating begins at 115°C junction temperature: output current must be reduced by 12mA/°C above that point. Full 1.5A is only sustainable with adequate heatsinking or forced airflow per Microchip AN-103.
Is the MIC29150-12BU compatible with lead-free reflow soldering processes?
Yes, the MIC29150-12BU is RoHS-compliant and qualified for standard lead-free reflow profiles, including peak temperatures up to 260°C for 30 seconds. The TO-263-5 package uses matte tin plating and passes JEDEC J-STD-020 moisture sensitivity Level 3 testing, requiring bake-out only if exposed to ambient >60% RH for >168 hours.
MIC29150-12BU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Packaging:
- Bulk
- 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):
- 0.6V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Transient Voltage
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-3
MIC29150-12BU FAQ
1.How can I place an order for MIC29150-12BU through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC29150-12BU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MIC29150-12BU reliable?
The price and inventory of MIC29150-12BU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC29150-12BU is usually 5 days.
3.What payment methods are accepted for MIC29150-12BU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC29150-12BU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC29150-12BU?
MIC29150-12BU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC29150-12BU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MIC29150-12BU?
For technical support, including MIC29150-12BU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC29150-12BU requirements.
6.How does Aetrix verify that MIC29150-12BU is sourced from the original manufacturer or authorized distributors?
All MIC29150-12BU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC29150-12BU meets industry standards.
7.What is the process for return or replacement of MIC29150-12BU?
All MIC29150-12BU units undergo pre-shipment inspection (PSI). If there is an issue with MIC29150-12BU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MIC29150-12BU part is unused and in its original packaging.
Return procedure for MIC29150-12BU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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