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onsemi MC7808CDTRKG
- Part No.:
- MC7808CDTRKG
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC7808CDTRKG.pdf
- Description:
- IC REG LINEAR 8V 1A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,578
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Product details
Overview
MC7808CDTRKG from onsemi is a fixed-output +8.0 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, and ±4% output voltage tolerance at 25°C. Designed for local on-card regulation in industrial power supplies and embedded control systems.
For engineers reviewing the MC7808CDTRKG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (2.0 V @ 1.0 A), ripple rejection (62 dB @ 120 Hz), quiescent current (3.3–8.0 mA), and thermal resistance (RθJC = 5.0 °C/W).
Technical Context
The MC7808CDTRKG implements a monolithic series pass transistor architecture with built-in protection circuitry including thermal overload shutdown and foldback current limiting. Its safe-area compensation dynamically reduces short-circuit current as VIN–VOUT increases, preventing second breakdown under fault conditions.
It operates without external components for basic regulation but requires input bypassing (≥0.33 µF) when located remotely from bulk filtering. Output capacitance is not required for stability but improves transient response-values below 0.1 µF may cause instability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +8.0 V nominal, ±4% tolerance at 25°C - ensures stable rail for 8 V logic or analog subsystems |
| Max Output Current | 1.0 A continuous - supports medium-power microcontrollers, sensors, and interface ICs |
| Dropout Voltage | 2.0 V @ 1.0 A, 25°C - mandates minimum 10 V input for reliable 8 V output under full load |
| Ripple Rejection | 62 dB @ 120 Hz - attenuates AC line ripple to <0.08% of input amplitude |
| Quiescent Current | 3.3–8.0 mA - low standby draw suitable for always-on industrial modules |
| Thermal Resistance | RθJC = 5.0 °C/W - enables high-power dissipation with minimal heatsink mass |
| Operating Junction Temp | +150°C max - supports operation in enclosed enclosures without forced airflow |
Pinout & Package
DPAK-3 (TO-252-3) surface-mount package with exposed thermal pad connected to Pin 2 (Ground). Heatsink surface must be electrically tied to ground for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input | Unregulated DC input; must exceed 10 V for full 1.0 A output at 8 V |
| Pin 2 | Ground | Common reference for input, output, and thermal pad; critical for thermal path integrity |
| Pin 3 | Output | Regulated +8.0 V supply; requires low-ESR output capacitor for transient load stability |
Key Features
| Feature | Design Value |
|---|---|
| Internal Thermal Shutdown | Activates at +150°C junction temperature to prevent permanent damage during overload or poor heatsinking |
| Short-Circuit Current Limit | 0.2 A typical - limits fault current to protect upstream traces and fuses |
| Safe-Area Compensation | Reduces short-circuit current as VIN–VOUT rises - prevents pass transistor destruction during high-differential faults |
| No External Components Required | Operates stably with only input bypass capacitor - simplifies BOM and layout for cost-sensitive designs |
| Pb-Free & RoHS Compliant | Meets EU Directive 2011/65/EU - qualified for industrial and automotive applications requiring environmental compliance |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering digital isolators, optocouplers, and level-shifters in 24 V fieldbus interfaces. IC Role / Device Role / Timing Role: Primary 8 V local regulator supplying isolated communication ICs and GPIO buffers. Use Value: Stable 8 V rail maintains signal integrity across galvanic isolation barriers despite 24 V bus fluctuations. | Use Scenario: Supplying microcontroller peripherals (CAN transceivers, LIN drivers, sensor ADCs) in body electronics. IC Role / Device Role / Timing Role: Fixed-voltage LDO delivering clean 8 V to mixed-signal subsystems with low noise sensitivity. Use Value: Ripple rejection >62 dB suppresses alternator noise, ensuring robust CAN/LIN communication. |
| Embedded Motor Drive Controller | Medical Diagnostic Instrument |
Use Scenario: Providing gate drive bias and logic power for half-bridge MOSFET drivers in 12–24 V motor control boards. IC Role / Device Role / Timing Role: Local 8 V regulator powering driver IC bias rails and microcontroller peripherals. Use Value: 1.0 A output supports simultaneous gate charging and MCU operation; thermal shutdown prevents latch-up during stall events. | Use Scenario: Powering precision op-amps, reference buffers, and low-noise ADC front-ends in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise 8 V supply for analog signal conditioning stages requiring stable reference points. Use Value: 10 µV/V output noise and <1.0 mΩ output impedance minimize baseline drift in sensitive measurement paths. |
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 |
|---|---|---|---|
| LM7808CDT/NOPB | ±2% output tolerance (tighter), higher RθJA (65 °C/W vs. 92 °C/W), same DPAK-3 footprint | Better initial accuracy but lower thermal efficiency - suited for low-power, ambient-temperature environments | Select LM7808CDT/NOPB when tighter output tolerance is prioritized over thermal headroom |
| NCV7808BDTRKG | AEC-Q100 qualified, ±2% tolerance, enhanced ESD rating (HBM 2000 V), identical pinout and electrical specs | Qualified for automotive under-hood use - required where PPAP documentation and extended temperature validation are mandatory | Choose NCV7808BDTRKG for automotive OEM or Tier-1 production programs needing automotive-grade qualification |
Compared with LM7808CDT/NOPB, MC7808CDTRKG trades tighter tolerance for better thermal performance and broader industrial operating range; versus NCV7808BDTRKG, it lacks AEC-Q100 certification but offers identical electrical behavior at lower cost for non-automotive applications.
Availability
MC7808CDTRKG is available at Aetrix Electronics and suitable for industrial automation, embedded motor control, and medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MC7808CDTRKG 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, medical, and IoT applications.
The MC7800 series was designed as cost-optimized, robust fixed-voltage linear regulators for local point-of-load regulation in space-constrained, thermally demanding environments.
FAQ
What is the minimum input voltage required for MC7808CDTRKG to deliver 1.0 A at 8 V output?
The MC7808CDTRKG requires a minimum input voltage of 10.0 V to sustain 1.0 A output at +8.0 V, based on its 2.0 V dropout voltage specification at 25°C. At elevated temperatures or higher load currents, derating is recommended - consult Figure 2 in the datasheet for peak current vs. VIN–VOUT.
Does MC7808CDTRKG require an output capacitor for stability?
No, MC7808CDTRKG does not require an output capacitor for stability - it is internally compensated. However, adding ≥0.1 µF ceramic or tantalum output capacitance significantly improves transient response to load steps. Values below 0.1 µF may cause instability per datasheet Note 4.
Can MC7808CDTRKG be used in adjustable-voltage configurations?
Yes, MC7808CDTRKG can be configured as an adjustable regulator using external resistors per Figure 10 in the datasheet. Though optimized for fixed 8 V operation, its internal reference and error amplifier allow output voltages above 8 V via feedback divider - design must account for increased dropout and thermal load.
What is the thermal resistance from junction to case (RθJC) for MC7808CDTRKG?
The thermal resistance from junction to case (RθJC) for MC7808CDTRKG is 5.0 °C/W, measured with the exposed thermal pad soldered to a minimum 1-inch² copper area. This value enables efficient heat transfer to PCB copper or external heatsinks, supporting >1.5 W dissipation with proper layout.
Is MC7808CDTRKG pin-compatible with other MC7800-series regulators in DPAK-3?
Yes, all MC7800-series regulators in DPAK-3 package (e.g., MC7805CDTRKG, MC7812CDTRKG) share identical pinout: Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output. This allows direct substitution within the same voltage family when board layout accommodates thermal requirements.
MC7808CDTRKG 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):
- 8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 8 mA
- Current - Supply (Max):
- -
- PSRR:
- 62dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
MC7808CDTRKG FAQ
1.How can I place an order for MC7808CDTRKG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7808CDTRKG 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 MC7808CDTRKG reliable?
The price and inventory of MC7808CDTRKG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7808CDTRKG is usually 5 days.
3.What payment methods are accepted for MC7808CDTRKG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7808CDTRKG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7808CDTRKG?
MC7808CDTRKG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7808CDTRKG 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 MC7808CDTRKG?
For technical support, including MC7808CDTRKG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7808CDTRKG requirements.
6.How does Aetrix verify that MC7808CDTRKG is sourced from the original manufacturer or authorized distributors?
All MC7808CDTRKG 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 MC7808CDTRKG meets industry standards.
7.What is the process for return or replacement of MC7808CDTRKG?
All MC7808CDTRKG units undergo pre-shipment inspection (PSI). If there is an issue with MC7808CDTRKG, 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 MC7808CDTRKG part is unused and in its original packaging.
Return procedure for MC7808CDTRKG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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