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onsemi MC7808CDTRK
- Part No.:
- MC7808CDTRK
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC7808CDTRK.pdf
- Description:
- IC REG LINEAR 8V 1A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,058
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Product details
Overview
MC7808CDTRK from onsemi is a fixed-output +8.0 V, 1.0 A linear voltage regulator in DPAK-3 surface-mount package, featuring internal thermal shutdown, short-circuit current limiting, and safe-area compensation for robust local regulation in industrial power supplies and embedded systems.
For engineers reviewing the MC7808CDTRK datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 8.0 V ±3% output over 5–1.0 A load, 2.0 V dropout at 1.0 A, 62 dB ripple rejection at 120 Hz, and operation up to +125°C junction temperature with heatsinking.
Technical Context
This monolithic IC uses a PNP pass transistor with built-in protection circuitry including foldback current limiting and thermal foldback. It operates without external components for basic regulation but supports adjustable output via external resistors per Figure 10 of the datasheet.
The device maintains stable output under line variations (≤6.0 mV line regulation) and load changes (≤1.4 mV load regulation), with low 10 µV/V output noise and 0.9 mΩ output impedance at 1 kHz - enabling clean DC for analog circuits and microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +8.0 V ±3% (7.7–8.3 V) at TJ = 25°C; stable across 5 mA–1.0 A load and input 10.5–23 V |
| Output Current | 1.0 A continuous (2.2 A peak); internally limited with thermal shutdown above +150°C |
| Dropout Voltage | 2.0 V at 1.0 A and TJ = 25°C - requires minimum 10.0 V input for full-load 8.0 V output |
| Ripple Rejection | 62 dB at 120 Hz, 11.5–18 VIN - suppresses AC mains-derived ripple in unregulated DC supplies |
| Quiescent Current | 3.3–6.0 mA - enables low standby power in always-on industrial controllers |
| Operating Temperature | −40°C to +125°C junction - qualified for extended industrial environments |
| Package | DPAK-3 (TO-252-3), surface-mount; heatsink surface electrically connected to Pin 2 (GND) |
Pinout & Package
DPAK-3 (TO-252-3) package with exposed thermal pad tied to Pin 2 (Ground). Requires PCB copper area for heatsinking to sustain 1.0 A continuous output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input | Unregulated DC input (10.5–23 V); must exceed output by ≥2.0 V under full load |
| Pin 2 | Ground | Common reference for input/output; also connects to heatsink surface - critical for thermal performance |
| Pin 3 | Output | Regulated +8.0 V supply; bypass capacitor (≥0.33 µF) recommended at point-of-load |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Enables drop-in replacement in legacy 78xx designs without redesigning feedback networks |
| Internal thermal overload protection | Shuts down output when junction exceeds +150°C - prevents catastrophic failure during transient overloads |
| Short-circuit current limiting | Clamps output to ≤0.2 A under hard short - protects upstream supply and PCB traces |
| Safe-area compensated pass transistor | Reduces short-circuit current as VCE increases - improves reliability under fault conditions |
| 1.5% to 4% output tolerance options | MC7808CDTRK is C-grade (±3%), suitable for non-precision industrial logic and analog rails |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Powering digital isolators, optocouplers, and level-shifters in 24 V fieldbus interfaces. IC Role / Device Role / Timing Role: Local +8 V rail generator for signal conditioning circuitry adjacent to noisy relay drivers. Use Value: 62 dB ripple rejection ensures clean logic-level signals despite high di/dt transients on shared 24 V bus. |
Use Scenario: Supplying microcontroller peripherals (CAN transceivers, sensor ADCs) in non-safety-critical modules. IC Role / Device Role / Timing Role: Fixed-voltage LDO replacement for legacy 78xx-based subsystems requiring AEC-Q100 alignment. Use Value: Thermal shutdown and short-circuit limiting meet automotive robustness requirements without added protection ICs. |
| Point-of-Load DC/DC Post-Regulation | Legacy Equipment Power Retrofit |
|
Use Scenario: Tightening output tolerance and reducing noise after switching DC/DC converters in test equipment. IC Role / Device Role / Timing Role: Low-noise linear post-regulator improving PSRR for precision analog front-ends. Use Value: 10 µV/V output noise and 0.9 mΩ output impedance minimize voltage error in 12-bit DAC references. |
Use Scenario: Replacing obsolete TO-220 7808 regulators in aging medical or lab instruments with SMT-compatible solution. IC Role / Device Role / Timing Role: Pin-compatible DPAK upgrade path preserving PCB layout while improving thermal performance. Use Value: Same 3-pin functional interface and electrical specs enable direct replacement without firmware or schematic changes. |
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 (TI) | Same 8 V output, 1.0 A rating, DPAK-3 package; 1.5% initial tolerance vs. MC7808CDTRK's 3%; higher quiescent current (4.5–8.0 mA) | Better initial accuracy suits tighter analog rails; higher IQ reduces efficiency in battery-backed systems | Select LM7808CDT/NOPB when ±1.5% output tolerance is mandatory; verify thermal margin with same PCB copper area |
| NCV7808BDTRKG (onsemi) | Automotive-grade variant: AEC-Q100 qualified, wider −40°C to +150°C operating range, same 8 V ±2% output | Required for under-hood automotive modules; not necessary for commercial/industrial use | Choose NCV7808BDTRKG only if AEC-Q100 compliance or extended temperature operation is specified in your design requirements |
Compared with LM7808CDT/NOPB, MC7808CDTRK offers lower quiescent current and broader input voltage range (up to 23 V), while NCV7808BDTRKG adds automotive qualification at the cost of tighter tolerance - making MC7808CDTRK optimal for cost-sensitive industrial point-of-load regulation.
Availability
MC7808CDTRK is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and legacy equipment retrofits requiring stable component supply and long-term manufacturability.
Supply support for MC7808CDTRK 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The MC7800 series was designed as a drop-in replacement for legacy 78xx regulators, delivering enhanced thermal protection and consistent performance in surface-mount form factors for modern manufacturing.
FAQ
What is the maximum input voltage for MC7808CDTRK?
The absolute maximum input voltage for MC7808CDTRK is 35 V DC, but the recommended operating range is 10.5 V to 23 V to ensure stable regulation and avoid excessive power dissipation. Exceeding 23 V significantly increases thermal stress, especially at full 1.0 A load - proper heatsinking is essential above 15 V input.
Does MC7808CDTRK require input and output capacitors?
MC7808CDTRK does not require output capacitance for stability, but a 0.33 µF input capacitor is recommended when traces exceed 2 inches from the bulk filter, and a 0.1 µF ceramic output capacitor improves transient response. The datasheet explicitly states "CO is not needed for stability" but confirms it enhances dynamic performance.
Can MC7808CDTRK be used in adjustable-voltage configurations?
Yes, MC7808CDTRK can be configured as an adjustable regulator using external resistors per Figure 10 in the datasheet. Though optimized for fixed 8 V output, its internal reference and error amplifier allow reconfiguration - however, output accuracy and regulation degrade compared to dedicated adjustable regulators like LM317.
What is the thermal resistance of MC7808CDTRK in DPAK-3 package?
The MC7808CDTRK in DPAK-3 package has a junction-to-case thermal resistance (RθJC) of 5.0°C/W and junction-to-ambient (RθJA) of 65°C/W with standard PCB copper. Effective heatsinking requires ≥1 in² of 2-oz copper connected to Pin 2 (GND/thermal pad) to sustain 1.0 A at ambient temperatures above 50°C.
Is MC7808CDTRK RoHS and REACH compliant?
Yes, MC7808CDTRK is Pb-free and RoHS-compliant per onsemi documentation, and meets REACH SVHC requirements. The device marking includes "Pb-Free" designation, and packaging complies with J-STD-609 Class 3 moisture sensitivity level (MSL-3) for standard SMT assembly processes.
MC7808CDTRK 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
MC7808CDTRK FAQ
1.How can I place an order for MC7808CDTRK through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7808CDTRK 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 MC7808CDTRK reliable?
The price and inventory of MC7808CDTRK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7808CDTRK is usually 5 days.
3.What payment methods are accepted for MC7808CDTRK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7808CDTRK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7808CDTRK?
MC7808CDTRK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7808CDTRK 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 MC7808CDTRK?
For technical support, including MC7808CDTRK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7808CDTRK requirements.
6.How does Aetrix verify that MC7808CDTRK is sourced from the original manufacturer or authorized distributors?
All MC7808CDTRK 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 MC7808CDTRK meets industry standards.
7.What is the process for return or replacement of MC7808CDTRK?
All MC7808CDTRK units undergo pre-shipment inspection (PSI). If there is an issue with MC7808CDTRK, 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 MC7808CDTRK part is unused and in its original packaging.
Return procedure for MC7808CDTRK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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