My Inquiry
My Account
onsemi MC7812CDTRK
- Part No.:
- MC7812CDTRK
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC7812CDTRK.pdf
- Description:
- IC REG LINEAR 12V 1A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,940
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC7812CDTRK from onsemi is a fixed-output +12 V, 1.0 A linear voltage regulator in DPAK-3 surface-mount package. It features internal thermal shutdown, short-circuit current limiting, safe-area compensation, ±4% output voltage tolerance at 25°C, and 2.0 V dropout at 1.0 A - designed for local regulation in industrial power supplies, embedded controllers, and analog sensor interfaces.
For engineers reviewing the MC7812CDTRK datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal behavior, PCB layout guidance for stability, and validated drop-in alternatives for legacy design refreshes and BOM optimization.
Technical Context
The MC7812CDTRK implements a monolithic NPN pass transistor architecture with built-in foldback current limiting and junction temperature sensing. Its safe-area compensation dynamically reduces short-circuit current as input-output differential voltage rises, preventing second breakdown during fault conditions.
It operates without external components for basic regulation but requires ≥0.33 µF input bypass capacitance when placed >2 cm from bulk filter; output capacitance (≥0.1 µF) improves transient response but is not required for stability. Ripple rejection is 55–60 dB at 120 Hz with 15–25 VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +12.0 V nominal, ±4% tolerance at 25°C (11.5–12.5 V over full load/temperature) |
| Output Current | 1.0 A continuous (2.2 A peak), internally limited with thermal foldback |
| Dropout Voltage | 2.0 V at 1.0 A and 25°C - mandates minimum 14.0 V input under full load |
| Ripple Rejection | 55 dB min at 120 Hz, 15–25 VIN - suppresses AC line noise in unregulated DC rails |
| Quiescent Current | 3.4–6.0 mA typical - low bias draw enables efficient standby operation |
| Thermal Shutdown | Activates at +150°C junction temperature - protects against heatsink failure or airflow loss |
| Package | DPAK-3 (TO-252-3), thermally enhanced surface-mount with exposed drain pad tied to Pin 2 (GND) |
Pinout & Package
DPAK-3 (TO-252-3) package with exposed thermal pad soldered to PCB ground plane for optimal heat dissipation. Pin 2 serves as both circuit ground and thermal interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input | Unregulated DC input (14.5–27 V recommended); must be ≥2.0 V above output under worst-case ripple |
| Pin 2 | Ground | Common reference for input/output; electrically and thermally connected to exposed pad |
| Pin 3 | Output | Stable +12 V regulated output; decoupling capacitor recommended within 1 cm |
Key Features
| Feature | Design Value |
|---|---|
| No external components needed | Enables minimal BOM count and single-layer PCB layouts for cost-sensitive industrial modules |
| Internal short-circuit protection | Limits fault current to ≤0.2 A at 35 VIN, preventing trace burnout and system-level damage |
| Safe-area compensated pass transistor | Reduces short-circuit current as VIN–VOUT increases - avoids thermal runaway during overvoltage faults |
| Thermal overload shutdown | Auto-recovery after cooldown; eliminates need for external thermal sensors or reset logic |
| Pb-free and RoHS-compliant | Meets IPC-J-STD-020 moisture sensitivity level 1 (MSL1) for standard reflow assembly |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Powering isolated analog input circuits and digital I/O drivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary +12 V local regulator supplying ADC references, op-amps, and optocoupler LEDs. Use Value: ±4% output tolerance and 55 dB ripple rejection ensure <1 LSB error in 12-bit analog acquisition under noisy factory EMI. | Use Scenario: Providing stable +12 V rail for microcontroller peripherals, CAN transceivers, and window lift motor drivers. IC Role / Device Role / Timing Role: Secondary regulation stage downstream of automotive-grade DC-DC converter. Use Value: Thermal shutdown at +150°C and safe-area compensation prevent latch-up during cabin temperature extremes (−40°C to +105°C ambient). |
| Point-of-Load Power for Sensors | Legacy Equipment Power Retrofit |
Use Scenario: Regulating +12 V for precision pressure, temperature, and flow sensors in HVAC and process control systems. IC Role / Device Role / Timing Role: Local regulation adjacent to sensor signal conditioning circuitry to minimize noise coupling. Use Value: Low 10 µV/V output noise and 1.1 mΩ output impedance preserve sensor SNR and enable sub-mV measurement resolution. | Use Scenario: Replacing obsolete TO-220-based 7812 regulators in aging test equipment and medical devices. IC Role / Device Role / Timing Role: Direct functional replacement with identical electrical behavior and improved thermal performance. Use Value: DPAK-3 footprint allows drop-in PCB redesign with no layer changes - only pad expansion for thermal relief. |
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 |
|---|---|---|---|
| LM7812CDT/NOPB | ±2% output tolerance (tighter), higher quiescent current (4.2–8.0 mA), same DPAK-3 package | Better initial accuracy for reference-sensitive analog stages; slightly higher no-load power loss | Select when output voltage precision outweighs idle power budget constraints |
| NCV7812BDTRKG | AEC-Q100 Grade 1 qualified (−40°C to +125°C), ±2% tolerance, automotive PPAP capable | Required for under-hood automotive applications; supports extended temperature validation and traceability | Select for automotive OEM designs requiring certified reliability and change control |
Compared with LM7812CDT/NOPB, MC7812CDTRK trades tighter initial tolerance for lower quiescent current and broader industrial qualification; versus NCV7812BDTRKG, it lacks AEC-Q100 certification but offers cost advantage for non-automotive use cases.
Availability
MC7812CDTRK is available at Aetrix Electronics and suitable for industrial automation, embedded control, and sensor interface applications requiring stable component supply across multi-year production cycles.
Supply support for MC7812CDTRK 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
The MC7800 series was engineered as a robust, pin-compatible family of fixed-voltage linear regulators targeting cost-sensitive, high-reliability power management in harsh environments - emphasizing thermal resilience, fault tolerance, and long-term manufacturability.
FAQ
What is the maximum input voltage rating for MC7812CDTRK?
The absolute maximum input voltage for MC7812CDTRK is 35 V DC, per the datasheet's Maximum Ratings table. Continuous operation above 27 V is not recommended due to thermal stress - the device requires ≥14.5 V input for 1.0 A output, and derating is necessary beyond 25 V to maintain safe junction temperature with standard heatsinking.
Does MC7812CDTRK require input and output capacitors for stable operation?
MC7812CDTRK does not require output capacitance for stability, but a ≥0.1 µF ceramic or tantalum capacitor is recommended to improve transient response. An input bypass capacitor ≥0.33 µF is required if the regulator is located more than 2 cm from the bulk input filter - low-ESR types (e.g., tantalum or multilayer ceramic) must be placed directly across Pins 1 and 2 with minimal trace length.
Can MC7812CDTRK be used in adjustable-voltage configurations?
Yes, MC7812CDTRK can be configured as an adjustable regulator using external resistors and a Zener diode per Figure 10 in the datasheet. However, its internal feedback network is optimized for fixed +12 V operation; adjustable use sacrifices initial accuracy, line/load regulation, and thermal performance - dedicated adjustable regulators (e.g., LM317) are preferred for variable-output designs.
What is the thermal resistance (RθJA) of MC7812CDTRK in standard PCB layout?
For MC7812CDTRK in DPAK-3 package with 1 in² (6.45 cm²) copper area on 1 oz FR-4 PCB, RθJA is 65°C/W per the datasheet. With 2 in² copper and 2 thermal vias under the exposed pad, it improves to ~45°C/W - enabling 1.0 A continuous output at up to +70°C ambient with no heatsink.
Is MC7812CDTRK compatible with lead-free reflow soldering processes?
Yes, MC7812CDTRK is Pb-free and RoHS-compliant, qualified for standard lead-free reflow profiles (J-STD-020 MSL1). Peak temperature must not exceed 260°C for ≤60 seconds, and ramp rates should stay within 3°C/s to avoid package delamination or solder joint voiding.
MC7812CDTRK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- 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):
- 6.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
MC7812CDTRK FAQ
1.How can I place an order for MC7812CDTRK through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7812CDTRK 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 MC7812CDTRK reliable?
The price and inventory of MC7812CDTRK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7812CDTRK is usually 5 days.
3.What payment methods are accepted for MC7812CDTRK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7812CDTRK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7812CDTRK?
MC7812CDTRK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7812CDTRK 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 MC7812CDTRK?
For technical support, including MC7812CDTRK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7812CDTRK requirements.
6.How does Aetrix verify that MC7812CDTRK is sourced from the original manufacturer or authorized distributors?
All MC7812CDTRK 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 MC7812CDTRK meets industry standards.
7.What is the process for return or replacement of MC7812CDTRK?
All MC7812CDTRK units undergo pre-shipment inspection (PSI). If there is an issue with MC7812CDTRK, 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 MC7812CDTRK part is unused and in its original packaging.
Return procedure for MC7812CDTRK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC7812CDTRK Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
