MC7808CD2TG ON Semiconductor Integrated Circuit (Other) In Stock
MC7808CD2TG is a fixed +8 V positive linear voltage regulator from ON Semiconductor rated at 1 A output current with 10.5 V to 25 V input range and a 2-pin D-Pak power package. Features thermal shutdown and overcurrent protection for robust regulation in industrial and consumer electronics. Available from authorized distributors from stock worldwide.
- Manufacturer
- ON Semiconductor
- Package
- Other
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- MC7808CD2TG Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed +8 V positive output with ±4% output accuracy over temperature and load
- 1 A continuous output current with built-in thermal shutdown and overcurrent protection
- D-Pak (D2PAK/TO-263) surface mount package for excellent heat dissipation without external heatsink up to 1 A
- Input voltage range 10.5 V to 25 V with 35 V absolute maximum, providing wide input headroom
Applications
MC7808CD2TG provides a stable 8 V regulated rail for analog signal conditioning circuits, reference voltage generators, and legacy industrial equipment requiring a 7800-series compatible regulator. Consumer appliances and set-top boxes use it to power audio amplifier bias circuits that operate at 8 V with up to 1 A demand. Industrial control boards benefit from the D-Pak power package which allows surface-mount installation with copper pour heatsinking, eliminating the through-hole TO-220 package while maintaining 1 A capability.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | 936-03 |
| Factory Lead Time | 4Weeks |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 2V |
| Input Voltage Absolute-Max | 35V |
| Input Voltage-Max | 25V |
| Input Voltage-Min | 10.5V |
| JESD-30 Code | R-PSSO-G2 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.032% |
| Load Regulation-Max | 0.035% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 8.4V |
| Output Voltage1-Min | 7.6V |
| Output Voltage1-Nom | 8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SMSIP3H,.55TB |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG |
| Packing Method | RAIL |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | MATTE TIN |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 5% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does MC7808CD2TG require to maintain stable 8 V output at full 1 A load?
MC7808CD2TG requires an input voltage between 10.5 V (minimum) and 25 V (maximum) to regulate its fixed +8 V output. The 2 V typical dropout voltage means the input must exceed 10 V at all times to maintain regulation. At 1 A load with 12 V input, the regulator dissipates 4 W internally, requiring a copper pour area of at least 6 cm² on the PCB to stay below 125 °C junction temperature in a 25 °C ambient environment.
How does the D-Pak package of MC7808CD2TG improve thermal management over a standard TO-220 through-hole regulator?
The D-Pak (TO-263) surface mount package of MC7808CD2TG has a thermal resistance of approximately 3 °C/W junction-to-case with the exposed pad soldered directly to a PCB copper thermal plane, compared to 5 °C/W for a TO-220 with clip heatsink. At 1 A output with 4 W dissipation, the D-Pak on a 50 cm² copper pour maintains junction temperature below 100 °C in 25 °C ambient. Eliminating the through-hole TO-220 also reduces assembly cost by enabling fully automated SMT production.
What protection features does MC7808CD2TG include to prevent damage from load faults and overvoltage events?
MC7808CD2TG integrates thermal shutdown that activates at approximately 150 °C junction temperature, reducing output current until the die cools below the threshold. Overcurrent limiting clamps output current at approximately 1.3 A to 1.8 A during short-circuit conditions, preventing transistor destruction. The 35 V absolute maximum input rating provides protection against supply transients up to 35 V on 24 V industrial rails, covering typical inductive load dump spikes in motor control supply lines.
For a legacy industrial control board requiring 8 V bias, how does MC7808CD2TG compare to a switching regulator alternative?
MC7808CD2TG delivers inherently low output noise below 100 μV RMS across 10 Hz to 100 kHz bandwidth, making it superior to typical buck converters that generate 5 mV to 20 mV ripple at 500 kHz switching frequency. For analog sensor conditioning circuits requiring less than 1 mV noise on the 8 V bias rail, the linear regulator provides a simpler, noise-free solution without LC filter components. The trade-off is efficiency: at 12 V input and 8 V output, MC7808CD2TG efficiency is 67%, versus 90%+ for a switching regulator, which matters only when the 1 A load is continuous in battery-powered designs.
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About ON Semiconductor
ON Semiconductor (onsemi) provides intelligent power and sensing technologies for automotive, industrial, IoT, and cloud infrastructure applications.
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