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Microchip Technology MIC29151-12BT
- Part No.:
- MIC29151-12BT
- Manufacturer:
- Microchip Technology
- Package:
- TO-220-5
- Datasheet:
-
MIC29151-12BT.pdf
- Description:
- IC REG LINEAR 12V 1.5A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,902
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Product details
Overview
MIC29151-12BT from Microchip Technology is a 1.5A low-dropout linear regulator with fixed 12V output, 350mV dropout voltage at full load, thermal shutdown and current limiting, used in industrial power supplies and embedded control systems requiring stable mid-voltage rail.
For engineers reviewing the MIC29151-12BT datasheet, MIC29151-12BT pinout, MIC29151-12BT application, or MIC29151-12BT equivalent, key selection criteria include dropout voltage at 1.5A, thermal performance in TO-220-5 package, input voltage range (up to 26V), and integrated protection features for unregulated DC input environments.
Technical Context
The MIC29151-12BT employs a PNP pass transistor architecture enabling low dropout operation without external compensation. It delivers regulated 12V ±2% output across load currents from 10mA to 1.5A and junction temperatures from −40°C to +125°C.
Internal circuitry includes foldback current limiting, thermal shutdown with hysteresis, and reverse-battery protection. Input voltage rejection is 70dB at 120Hz, and output noise is 45µVRMS (10Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±2%; eliminates need for external feedback resistors in 12V system rails. |
| Max Output Current | 1.5A continuous; supports mid-power microcontrollers, sensors, and interface ICs. |
| Dropout Voltage | 350mV at 1.5A; enables operation from 12.35V minimum input in 12V systems. |
| Input Voltage Range | 2.5V to 26V; accommodates wide-input unregulated supplies including automotive battery transients. |
| Thermal Shutdown | Activates at 165°C junction temperature with 20°C hysteresis; prevents permanent damage during overload. |
| PSRR | 70dB at 120Hz; suppresses ripple from upstream switching converters feeding the LDO. |
Pinout & Package
Supplied in a TO-220-5 package with exposed tab for thermal dissipation; pin 1 = Input, pin 2 = Ground, pin 3 = Output, pin 4 = Enable (active-high), pin 5 = Ground (thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Input supply connection | Accepts 2.5V–26V unregulated DC; requires local 10µF ceramic input capacitor. |
| Pin 2 (GND) | Signal ground reference | Provides return path for internal bias and error amplifier; must be low-impedance. |
| Pin 3 (OUT) | Regulated output terminal | Delivers 12V ±2% at up to 1.5A; requires 22µF ceramic output capacitor for stability. |
| Pin 4 (EN) | Enable control input | Active-high logic input; pulls output to zero when low; compatible with 3.3V/5V microcontroller GPIO. |
| Pin 5 (GND) | Thermal pad ground | Electrically tied to case; must be soldered to PCB copper pour for thermal conduction and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 350mV at 1.5A enables efficient 12V regulation from marginal input sources like rectified AC or aging batteries. |
| Integrated enable function | Pin 4 allows system-level power sequencing and standby mode control without external logic. |
| Reverse-battery protection | Prevents damage if input polarity is accidentally reversed-no external diode required. |
| Foldback current limiting | Reduces output current under short-circuit to limit power dissipation and maintain safe junction temperature. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering isolated analog sensor interfaces and digital I/O drivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary 12V LDO supplying ADC references, op-amps, and optocoupler LEDs. Use Value: 350mV dropout ensures reliable 12V rail even during brownout conditions on 15V bus inputs. | Use Scenario: Regulating 12V for microcontroller peripherals and CAN transceivers in non-safety-critical vehicle subsystems. IC Role / Device Role / Timing Role: Secondary 12V regulator downstream of main DC/DC converter, providing clean power for communication ICs. Use Value: 70dB PSRR suppresses switching noise from upstream 48V–12V buck converter, preventing CAN bit errors. |
| Medical Infusion Pump Controller | Test & Measurement Equipment |
Use Scenario: Supplying motor driver logic and pressure sensor signal conditioning circuits in battery-backed portable devices. IC Role / Device Role / Timing Role: Stable 12V source for precision op-amp stages and stepper motor gate drivers. Use Value: ±2% output tolerance maintains accuracy of analog front-end calibration over temperature and load. | Use Scenario: Generating clean 12V for analog signal chain components (DACs, filters, amplifiers) in benchtop instruments. IC Role / Device Role / Timing Role: Low-noise 12V supply for high-resolution data acquisition subsystems. Use Value: 45µVRMS output noise avoids degradation of 16-bit+ measurement resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2940CT-12 | Higher dropout (500mV at 1A), no enable pin, TO-220-3 package | Lacks programmable shutdown; less suitable for power-sequenced systems | Choose LM2940CT-12 only if enable functionality and lowest possible dropout are not required. |
| TPS7A4701RGWR | Lower noise (4.7µVRMS), adjustable output, 1A max, 6-pin WQFN | Requires external resistors; limited current capacity; surface-mount only | Choose TPS7A4701RGWR when ultra-low noise and adjustable voltage outweigh current and package constraints. |
Compared with LM2940CT-12 and TPS7A4701RGWR, the MIC29151-12BT uniquely balances 1.5A capability, 350mV dropout, enable control, and through-hole TO-220-5 packaging-making it optimal for industrial and automotive designs needing robust mid-current 12V regulation with simple layout and thermal management.
Availability
MIC29151-12BT is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC29151-12BT 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 MIC29151 series was designed as a high-current, low-dropout linear regulator family targeting applications where reliability, thermal robustness, and ease of use supersede ultra-low quiescent current or ultra-low noise requirements.
FAQ
What is the maximum input voltage rating for MIC29151-12BT?
The MIC29151-12BT supports an absolute maximum input voltage of 26V. Operation above this level risks permanent damage to the internal pass transistor and protection circuitry. For sustained reliability, design margins should keep input voltage ≤24V under worst-case transient conditions, especially in automotive or industrial environments with load-dump spikes.
Does MIC29151-12BT require external capacitors, and what values are recommended?
Yes, MIC29151-12BT requires both input and output capacitors for stability and transient response. A minimum 10µF ceramic capacitor (X7R, ≥16V rating) is required at the input, and a minimum 22µF ceramic capacitor (X7R, ≥16V rating) at the output. Larger values improve ripple rejection and load-step response but do not affect basic regulation.
How does the enable pin (Pin 4) function on MIC29151-12BT?
The enable pin (Pin 4) is active-high and TTL/CMOS compatible. When pulled ≥2.0V (min), the MIC29151-12BT regulates normally; when held ≤0.8V (max), output is disabled and sinks <10µA. This allows precise power sequencing in multi-rail systems and low-power standby modes without external MOSFET switches.
Can MIC29151-12BT be used in parallel to increase current capacity?
No, MIC29151-12BT is not designed for parallel operation. Its internal error amplifier lacks current-sharing circuitry, and mismatched thermal gradients or output impedances would cause unequal current distribution and potential thermal runaway. For >1.5A, select a higher-current LDO or switch-mode solution instead of paralleling MIC29151-12BT units.
Is MIC29151-12BT RoHS compliant and lead-free?
Yes, MIC29151-12BT is RoHS compliant and lead-free per Microchip's standard packaging. The TO-220-5 package uses matte tin plating on leads and meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1, allowing unlimited floor life at ≤30°C/85% RH. Full compliance documentation is available in Microchip's official product change notices.
MIC29151-12BT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-220-5
- 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:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Transient Voltage
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
MIC29151-12BT FAQ
1.How can I place an order for MIC29151-12BT through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC29151-12BT 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 MIC29151-12BT reliable?
The price and inventory of MIC29151-12BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC29151-12BT is usually 5 days.
3.What payment methods are accepted for MIC29151-12BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC29151-12BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC29151-12BT?
MIC29151-12BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC29151-12BT 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 MIC29151-12BT?
For technical support, including MIC29151-12BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC29151-12BT requirements.
6.How does Aetrix verify that MIC29151-12BT is sourced from the original manufacturer or authorized distributors?
All MIC29151-12BT 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 MIC29151-12BT meets industry standards.
7.What is the process for return or replacement of MIC29151-12BT?
All MIC29151-12BT units undergo pre-shipment inspection (PSI). If there is an issue with MIC29151-12BT, 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 MIC29151-12BT part is unused and in its original packaging.
Return procedure for MIC29151-12BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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