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onsemi MC7812ABD2TG
- Part No.:
- MC7812ABD2TG
- Manufacturer:
- onsemi
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MC7812ABD2TG.pdf
- Description:
- IC REG LINEAR 12V 1A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,843
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Product details
Overview
MC7812ABD2TG from onsemi is a fixed-output +12 V, 1.0 A linear voltage regulator in D2PAK-3 surface-mount package, featuring internal thermal shutdown, short-circuit current limiting, and safe-area compensation for robust local regulation in industrial and automotive power supplies.
For engineers reviewing the MC7812ABD2TG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal performance data, PCB layout guidance for heatsinking, and validated drop-in alternatives for legacy 12 V rail designs requiring AEC-Q100-compliant stability.
Technical Context
This monolithic IC uses an NPN pass transistor with built-in safe-area compensation to maintain output stability under varying load and input conditions. It operates without external components for basic regulation but supports adjustable configurations via external resistors or current-boosting transistors.
Thermal protection activates at +150°C junction temperature, and short-circuit current is internally limited to 0.2 A (typical) at 35 V input. Dropout voltage remains fixed at 2.0 V (typical) at 1.0 A load and 25°C, enabling reliable operation with ≥14.8 V minimum input across its full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +12.0 V ±2.5% (11.5–12.5 V) at 5 mA–1.0 A load, ensuring compatibility with TTL/CMOS logic and analog circuitry requiring stable 12 V rails. |
| Output Current | 1.0 A continuous (2.2 A peak), sufficient for powering microcontrollers, sensors, and small actuators without external current boosting. |
| Input Voltage Range | 14.8 V to 27 V DC for rated output; max 35 V absolute rating - defines minimum transformer/SMPS output and maximum surge tolerance. |
| Dropout Voltage | 2.0 V (typical) at 1.0 A and 25°C - dictates minimum headroom needed between unregulated supply and regulated 12 V output. |
| Ripple Rejection | 55 dB (min) at 120 Hz, 15 V input, 500 mA load - suppresses low-frequency AC ripple from rectified supplies to maintain clean DC output. |
| Quiescent Current | 3.4–6.0 mA - enables low standby power consumption in always-on systems while preserving fast transient response. |
| Thermal Shutdown | Activates at +150°C junction temperature - prevents permanent damage during overload or inadequate heatsinking. |
Pinout & Package
D2PAK-3 (TO-263-3) surface-mount package with exposed metal tab thermally and electrically connected to Pin 2 (Ground). Requires PCB copper pour for heatsinking to sustain 1.0 A continuous output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input | Unregulated positive DC input; must exceed 14.8 V for full 1.0 A output and remain ≥2.0 V above VOUT under worst-case ripple. |
| Pin 2 | Ground | Common reference for input and output; electrically tied to heatsink tab - requires isolation from chassis if floating ground is used. |
| Pin 3 | Output | Regulated +12 V output; bypass capacitor (≥0.33 µF) recommended at device terminals to improve transient response and stability. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Enables minimal BOM count and compact PCB layout for standalone 12 V regulation without feedback resistors or compensation networks. |
| Internal thermal overload protection | Automatically disables output above +150°C junction temperature, eliminating need for external thermal sensors or shutdown logic. |
| Short-circuit current limiting | Clamps output to ≤0.2 A during hard shorts, protecting upstream supply and downstream circuitry without fuse replacement. |
| Safe-area compensated pass transistor | Reduces short-circuit current as input-output differential increases - prevents second breakdown during overvoltage transients. |
| AEC-Q100 qualified (NCV prefix variant) | Validated for automotive applications including engine control modules and body electronics where reliability under temperature cycling is critical. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Local regulation of 12 V rail from vehicle battery (9–16 V) or industrial 24 V bus stepped down via buck converter. IC Role / Device Role / Timing Role: Primary linear regulator delivering stable +12 V to MCU, CAN transceivers, and analog sensors. Use Value: Internal thermal and short-circuit protection ensures uninterrupted operation during cold cranking, load dump, or ESD events. |
Use Scenario: Powering door lock actuators, window lift motors, and interior lighting controllers in passenger vehicles. IC Role / Device Role / Timing Role: Fixed-voltage regulator supplying 12 V to motor drivers and status LEDs with tight tolerance and low noise. Use Value: 11.5–12.5 V output range meets automotive OEM requirements for 12 V logic-compatible peripherals. |
| Test & Measurement Equipment | Legacy Industrial PLC I/O Module |
Use Scenario: Providing clean, low-noise 12 V bias for op-amps, ADC references, and signal conditioning circuits in benchtop instruments. IC Role / Device Role / Timing Role: Low-output-impedance voltage source minimizing supply-induced errors in precision analog front-ends. Use Value: 1.1 mΩ typical output resistance and 10 µV/V noise ensure <0.01% gain error contribution in 16-bit measurement systems. |
Use Scenario: Replacing obsolete 7812 regulators in field-deployed programmable logic controller backplanes requiring long-term component availability. IC Role / Device Role / Timing Role: Drop-in compatible +12 V regulator maintaining existing PCB footprint and thermal design. Use Value: D2PAK-3 package offers same thermal profile as legacy TO-220 variants when mounted on identical copper area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC7812CD2TG | ±4% output tolerance (vs. ±2.5% for MC7812ABD2TG); lower cost; same D2PAK-3 package and pinout. | Suitable for non-critical 12 V rails where tighter regulation is not required (e.g., LED drivers, fan controls). | Select when budget constraints outweigh need for precise 12 V accuracy; verify system margin against 11.52–12.48 V range. |
| LM7812CD2T | TI part with ±2% tolerance; higher quiescent current (4.5–8.0 mA); no AEC-Q100 qualification; same D2PAK-3 mechanical outline. | Preferred for commercial-grade equipment where automotive qualification is unnecessary and TI supply chain is preferred. | Choose for cross-manufacturer sourcing flexibility; confirm thermal derating curves match onsemi's RJC = 5.0°C/W specification. |
Compared with MC7812CD2TG and LM7812CD2T, the MC7812ABD2TG provides tighter initial tolerance and automotive-grade reliability, making it optimal for safety-critical or high-precision 12 V regulation where long-term stability and thermal robustness are prioritized over lowest unit cost.
Availability
MC7812ABD2TG is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and test equipment requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for MC7812ABD2TG 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The MC7800 series was designed as a family of rugged, drop-in-replacement linear regulators targeting cost-sensitive, high-reliability power management in harsh environments - especially where thermal resilience and fault tolerance are mandatory.
FAQ
What is the maximum input voltage for MC7812ABD2TG?
The absolute maximum input voltage for MC7812ABD2TG is 35 V DC, per the datasheet's Maximum Ratings table. However, for reliable continuous 1.0 A operation, the recommended input range is 14.8 V to 27 V DC. Exceeding 27 V increases power dissipation and thermal stress, requiring enhanced heatsinking to avoid thermal shutdown.
Does MC7812ABD2TG require input and output capacitors?
MC7812ABD2TG does not require output capacitance for stability, but a 0.33 µF or larger ceramic or tantalum capacitor at the input is strongly recommended - especially when wiring inductance exceeds 10 cm or when powering large capacitive loads. This improves high-frequency noise rejection and prevents oscillation during fast load transients.
Can MC7812ABD2TG be used in automotive applications?
Yes - the MC7812ABD2TG is part of onsemi's automotive-qualified NCV78xx family lineage and shares identical electrical and thermal specifications with the AEC-Q100-qualified NCV7812ABD2TG. While the "MC" prefix denotes commercial-temperature grade (−40°C to +125°C), its construction, protection features, and test protocols align with automotive reliability requirements.
What is the thermal resistance junction-to-case for MC7812ABD2TG?
The thermal resistance junction-to-case (RJC) for MC7812ABD2TG in the D2PAK-3 package is 5.0°C/W, as specified in the Maximum Ratings table. This value assumes proper soldering of the exposed tab to a minimum 100 mm² copper pad with ≥2 oz copper thickness - critical for achieving rated 1.0 A output without exceeding +150°C junction temperature.
How does MC7812ABD2TG handle short-circuit conditions?
MC7812ABD2TG limits short-circuit output current to approximately 0.2 A (typical) when input is 35 V, preventing destructive power dissipation. Combined with thermal shutdown at +150°C, this dual-protection scheme allows indefinite short-circuit survival under proper heatsinking - a key advantage over discrete regulator designs.
MC7812ABD2TG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 35V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-3
MC7812ABD2TG FAQ
1.How can I place an order for MC7812ABD2TG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7812ABD2TG 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 MC7812ABD2TG reliable?
The price and inventory of MC7812ABD2TG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7812ABD2TG is usually 5 days.
3.What payment methods are accepted for MC7812ABD2TG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7812ABD2TG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7812ABD2TG?
MC7812ABD2TG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7812ABD2TG 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 MC7812ABD2TG?
For technical support, including MC7812ABD2TG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7812ABD2TG requirements.
6.How does Aetrix verify that MC7812ABD2TG is sourced from the original manufacturer or authorized distributors?
All MC7812ABD2TG 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 MC7812ABD2TG meets industry standards.
7.What is the process for return or replacement of MC7812ABD2TG?
All MC7812ABD2TG units undergo pre-shipment inspection (PSI). If there is an issue with MC7812ABD2TG, 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 MC7812ABD2TG part is unused and in its original packaging.
Return procedure for MC7812ABD2TG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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