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onsemi MC7808CDTT5G
- Part No.:
- MC7808CDTT5G
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC7808CDTT5G.pdf
- Description:
- IC REG LINEAR 8V 1A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,804
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Product details
Overview
MC7808CDTT5G 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, safe-area compensation, ±4% output voltage tolerance at 25°C, and dropout voltage of 2.0 V at 1.0 A - used for local regulation in industrial power supplies, embedded control modules, and automotive body electronics.
For engineers reviewing the MC7808CDTT5G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.0 A continuous output under 23 V max input, thermal protection behavior at TJ = +150°C, ripple rejection of 62 dB at 120 Hz, and compatibility with standard DPAK PCB footprints requiring no external components for basic operation.
Technical Context
This monolithic IC employs a PNP pass transistor with built-in safe-area compensation to reduce short-circuit current as VCE increases, preventing second breakdown. Its thermal shutdown activates at +150°C junction temperature and latches off until cooldown.
The device operates without external capacitors for stability but requires ≥0.33 µF input bypass capacitance when located remotely from bulk filtering. Output noise is 10 µV/V RMS (10 Hz–100 kHz), and load regulation holds within 1.4 mV across 5 mA–1.0 A at TJ = 25°C.
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 circuitry |
| Max Output Current | 1.0 A continuous - supports mid-power microcontrollers, sensors, and interface ICs |
| Dropout Voltage | 2.0 V at 1.0 A and 25°C - requires minimum 10.0 V input for regulated 8.0 V output |
| Ripple Rejection | 62 dB at 120 Hz - suppresses line-frequency ripple from unregulated DC supplies |
| Quiescent Current | 3.3–8.0 mA - low standby draw suitable for always-on industrial monitoring systems |
| Thermal Shutdown | Activates at +150°C junction temperature - prevents permanent damage during overload |
| Short-Circuit Limit | 0.2 A typical - protects against sustained output faults without external current sensing |
Pinout & Package
DPAK-3 (TO-252-3) surface-mount package with exposed thermal pad connected to Pin 2 (Ground); footprint compatible with JEDEC MO-263 standard; heatsink surface electrically tied to ground for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input | Unregulated DC input (10.5–23 V recommended); must exceed output by ≥2.0 V |
| Pin 2 | Ground | Common reference for input and output; also connects to heatsink surface for thermal conduction |
| Pin 3 | Output | Regulated +8.0 V supply; requires no output capacitor for stability but benefits from 0.1 µF for transient response |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained regulation enables minimal BOM count and simplified layout |
| Internal thermal overload protection | Automatic shutdown at +150°C junction temperature prevents irreversible failure |
| Safe-area compensated output transistor | Reduces short-circuit current as VCE rises - avoids secondary breakdown during fault conditions |
| Fixed +8.0 V output with 4% tolerance | Meets cost-sensitive industrial applications where precision trimming is unnecessary |
| Pb-free and RoHS-compliant | Complies with environmental directives for global manufacturing and automotive use |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Powering digital isolators, CAN transceivers, and optocouplers in modular I/O racks. IC Role / Device Role / Timing Role: Local +8 V rail generator providing clean, thermally robust supply independent of main system rail. Use Value: Eliminates need for external current limiting or thermal monitoring circuits due to integrated protection. |
Use Scenario: Supplying window lift controllers, seat position memory ICs, and interior lighting drivers. IC Role / Device Role / Timing Role: Fixed-voltage regulator delivering stable 8 V to mixed-signal ASICs in harsh automotive environments. Use Value: Withstands load dump transients up to 35 V input and maintains regulation across −40°C to +125°C ambient. |
| Embedded Sensor Signal Conditioning | Legacy Industrial Instrumentation |
|
Use Scenario: Biasing op-amps, ADC references, and bridge sensor excitation in field-deployed transmitters. IC Role / Device Role / Timing Role: Low-noise (10 µV/V), low-drift (+8.0 V ±0.4 mV/°C) voltage source for precision analog front-ends. Use Value: Output resistance of 0.9 mΩ minimizes load-induced voltage sag during dynamic sensor sampling. |
Use Scenario: Replacing aging 7808 variants in retrofit power supplies for panel meters and data loggers. IC Role / Device Role / Timing Role: Direct drop-in replacement for legacy TO-220 7808 regulators using DPAK footprint with improved thermal performance. Use Value: Same electrical specs and pinout as MC7808CT (TO-220), enabling board-level upgrade without redesign. |
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 quiescent current (4.5–8.5 mA), same DPAK-3 package | Better initial accuracy but lower PSRR (55 dB vs. 62 dB) and no automotive qualification | Select for cost-sensitive non-automotive designs needing tighter VOUT spec |
| NCV7808BDTT1G | ±2% tolerance, AEC-Q100 Grade 1 (−40°C to +125°C), enhanced ESD rating (HBM 2 kV) | Qualified for automotive safety-critical subsystems; higher reliability screening | Select for automotive body electronics requiring PPAP documentation and extended temp range |
Compared with LM7808CDT/NOPB, MC7808CDTT5G offers superior ripple rejection and lower quiescent current; compared with NCV7808BDTT1G, it trades automotive qualification for lower unit cost while retaining identical thermal and electrical performance in industrial operating ranges.
Availability
MC7808CDTT5G is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and embedded sensor systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MC7808CDTT5G 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 for rugged, cost-effective local regulation in space-constrained systems - emphasizing thermal resilience, fault tolerance, and ease of integration without external compensation.
FAQ
What is the maximum input voltage rating for MC7808CDTT5G?
The absolute maximum input voltage for MC7808CDTT5G is 35 V DC, per the datasheet's Maximum Ratings table. However, for reliable continuous operation at 1.0 A output, the recommended input range is 10.5 V to 23 V - ensuring adequate headroom above the 2.0 V dropout while staying within safe power dissipation limits.
Does MC7808CDTT5G require an input bypass capacitor?
Yes - MC7808CDTT5G requires a minimum 0.33 µF input bypass capacitor (tantalum, ceramic, or film) placed directly across Pins 1 and 2. This is mandatory when the regulator is located more than ~2 inches from bulk input filtering, as specified in the Applications Information section to prevent oscillation and ensure high-frequency stability.
Can MC7808CDTT5G be used in automotive applications?
MC7808CDTT5G is not AEC-Q100 qualified and lacks automotive-specific screening or PPAP documentation. For automotive use, onsemi recommends the pin-compatible NCV7808BDTT1G variant, which meets Grade 1 temperature requirements (−40°C to +125°C) and includes enhanced ESD protection and process controls.
What is the thermal resistance (RθJA) of MC7808CDTT5G in standard DPAK mounting?
When mounted on a 1-inch² copper pad (2 oz Cu, 1 layer), the typical junction-to-ambient thermal resistance RθJA for MC7808CDTT5G is 65°C/W, as specified in the Maximum Ratings table. With a properly sized thermal pad and solder mask defined, this enables 1.0 A operation up to +75°C ambient without forced airflow.
How does the safe-area compensation in MC7808CDTT5G improve reliability?
Safe-area compensation in MC7808CDTT5G dynamically reduces short-circuit current as the pass transistor's VCE increases - preventing operation in the second-breakdown region. This allows the device to survive sustained output shorts at high input voltages without destructive failure, eliminating need for external foldback circuitry.
MC7808CDTT5G 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
MC7808CDTT5G FAQ
1.How can I place an order for MC7808CDTT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7808CDTT5G 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 MC7808CDTT5G reliable?
The price and inventory of MC7808CDTT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7808CDTT5G is usually 5 days.
3.What payment methods are accepted for MC7808CDTT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7808CDTT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7808CDTT5G?
MC7808CDTT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7808CDTT5G 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 MC7808CDTT5G?
For technical support, including MC7808CDTT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7808CDTT5G requirements.
6.How does Aetrix verify that MC7808CDTT5G is sourced from the original manufacturer or authorized distributors?
All MC7808CDTT5G 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 MC7808CDTT5G meets industry standards.
7.What is the process for return or replacement of MC7808CDTT5G?
All MC7808CDTT5G units undergo pre-shipment inspection (PSI). If there is an issue with MC7808CDTT5G, 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 MC7808CDTT5G part is unused and in its original packaging.
Return procedure for MC7808CDTT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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