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onsemi MC7808CDTT5
- Part No.:
- MC7808CDTT5
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC7808CDTT5.pdf
- Description:
- IC REG LINEAR 8V 1A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,905
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Product details
Overview
MC7808CDTT5 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 and automotive power supplies.
For engineers reviewing the MC7808CDTT5 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs (±4% output tolerance, 2.0 V dropout at 1.0 A), thermal resistance (RθJC = 5.0 °C/W), ripple rejection (62 dB @ 120 Hz), and real-world design guidance for stable operation with minimal external components.
Technical Context
The MC7808CDTT5 implements a monolithic series-pass transistor architecture with built-in protection circuitry: thermal overload shutdown activates at +150°C junction temperature, and short-circuit current limiting holds peak output at 0.2 A under fault conditions. Its safe-area compensation dynamically reduces short-circuit current as input-to-output differential increases.
Designed for fixed-voltage operation, it requires no external feedback network but supports adjustable configurations via external resistors. Input voltage range is 10.5–23 V DC for rated 1.0 A output, with minimum headroom of 2.0 V across operating temperature (−40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +8.0 V nominal, ±4% tolerance (7.68–8.32 V) over full load and temperature range - ensures compatibility with 8 V logic and analog subsystems. |
| Output Current | 1.0 A continuous (2.2 A peak) - supports mid-power microcontrollers, sensors, and interface ICs without external boost. |
| Dropout Voltage | 2.0 V at 1.0 A and 25°C - mandates ≥10.5 V input for stable 8 V output under full load. |
| Ripple Rejection | 62 dB @ 120 Hz, 11.5–18 VIN - suppresses AC line noise in unregulated DC-DC front-ends. |
| Quiescent Current | 3.3–6.0 mA - enables low standby power in always-on systems. |
| Thermal Resistance | RθJC = 5.0 °C/W - allows direct heatsink mounting to Pin 2 (GND) for >1 W dissipation. |
| Operating Junction Temp | −40°C to +150°C - qualified for under-hood automotive and industrial environments. |
Pinout & Package
DPAK-3 (TO-252-3) package with exposed thermal pad connected internally to Pin 2 (Ground); requires PCB copper pour under pad for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (VIN) | Unregulated DC input; must exceed 10.5 V and maintain ≥2.0 V above output under worst-case ripple and load. |
| 2 | Ground (GND) | Common reference for input and output; also serves as thermal path - must be connected to large copper area. |
| 3 | Output (VOUT) | Regulated +8.0 V supply; bypass capacitor (≥0.33 µF) recommended at point-of-load for transient response. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained regulation with integrated pass transistor and feedback - eliminates trimming resistors and compensation networks. |
| Internal thermal shutdown | Automatic disable at +150°C junction temperature - prevents damage during overload or poor heatsinking. |
| Short-circuit current limiting | Holds output current ≤0.2 A during hard shorts - protects upstream supply and avoids catastrophic failure. |
| Safe-area compensated output stage | Reduces short-circuit current as VIN–VOUT rises - maintains SOA integrity across wide input ranges. |
| Pb-free and RoHS compliant | Meets environmental standards for industrial and automotive production without lead exemptions. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Powering isolated digital I/O drivers and analog sensor signal conditioning circuits in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Local +8 V rail generator with high noise immunity and thermal resilience in 24 V DC fieldbus systems. Use Value: Eliminates need for discrete protection circuitry while maintaining 1.0 A capability across −25°C to +70°C ambient. |
Use Scenario: Supplying microcontroller peripherals (CAN transceivers, LIN drivers, EEPROM) in door modules and seat control units. IC Role / Device Role / Timing Role: Fixed 8 V bias source meeting AEC-Q100 Grade 2 requirements for automotive electronics. Use Value: Delivers stable voltage despite battery transients (up to 35 V load dump) due to integrated short-circuit and thermal protection. |
| Point-of-Load DC-DC Post-Regulation | Legacy Equipment Power Retrofit |
Use Scenario: Tight-tolerance post-regulation after switching DC-DC converters in test equipment and medical devices. IC Role / Device Role / Timing Role: Low-noise linear regulator reducing switching ripple (<10 µV RMS noise) for precision ADC references. Use Value: 62 dB ripple rejection and 10 µV/V output noise enable sub-12-bit accuracy without additional filtering. |
Use Scenario: Replacing obsolete 7808 variants in aging industrial instrumentation where board space and BOM count are constrained. IC Role / Device Role / Timing Role: Drop-in compatible +8 V regulator with identical pinout and thermal profile to legacy TO-220 versions. Use Value: DPAK-3 footprint allows direct replacement using existing stencil and reflow profile - no layout change required. |
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, and DPAK-3 package; ±2% initial tolerance vs. ±4% for MC7808CDTT5; lower quiescent current (4.2–5.5 mA). | Better initial accuracy suits precision analog rails; slightly lower thermal resistance (RθJC = 4.5 °C/W) improves margin at high ambient. | Select when tighter output tolerance or lower IQ is critical; verify compatibility with existing thermal pad layout. |
| NCV7808BDTT5G (onsemi) | AEC-Q100 qualified Grade 1 (−40°C to +125°C), same DPAK-3 package; ±2% output tolerance; enhanced ESD rating (HBM 2000 V). | Required for new automotive designs needing PPAP documentation and extended temperature validation. | Choose for automotive OEM programs requiring full qualification evidence and traceable lot data. |
Compared with LM7808CDT/NOPB and NCV7808BDTT5G, the MC7808CDTT5 offers broader commercial temperature support (−40°C to +125°C), cost-effective industrial qualification, and proven reliability in legacy designs - making it optimal for non-automotive embedded systems where ±4% output tolerance is acceptable.
Availability
MC7808CDTT5 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and legacy equipment repair requiring stable component supply with consistent DPAK-3 packaging and long-term lifecycle assurance.
Supply support for MC7808CDTT5 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 a rugged, drop-in family of fixed-output linear regulators targeting cost-sensitive, high-reliability power management in harsh environments - emphasizing thermal robustness, fault tolerance, and ease of use.
FAQ
What is the maximum input voltage for the MC7808CDTT5?
The MC7808CDTT5 supports a maximum input voltage of 35 V DC, as specified in absolute maximum ratings. However, for reliable continuous operation at 1.0 A output, the recommended input range is 10.5 V to 23 V DC to maintain thermal safety and meet dropout and ripple rejection specifications. Sustained operation above 25 V requires careful thermal design due to increased power dissipation.
Does the MC7808CDTT5 require input and output capacitors?
The MC7808CDTT5 does not require output capacitance for stability, but a 0.33 µF or larger ceramic or tantalum capacitor at the input is strongly recommended when traces exceed 2 inches or when powering large capacitive loads. An output capacitor (e.g., 1–10 µF) improves transient response but is optional per the datasheet - unlike LDOs, this classic linear regulator remains unconditionally stable without it.
How does thermal shutdown work in the MC7808CDTT5?
The MC7808CDTT5 incorporates a junction temperature sensor that disables the output pass transistor when die temperature reaches +150°C. Once the junction cools by ~15°C (hysteresis), regulation automatically resumes. This cycle protects against permanent damage during sustained overload or inadequate heatsinking - confirmed in the datasheet's "Thermal Shutdown" section and validated across all MC7800 variants.
Can the MC7808CDTT5 be used in adjustable-voltage configurations?
Yes - the MC7808CDTT5 can be configured as an adjustable regulator using external resistors, as shown in Figure 10 of the datasheet. By connecting a voltage divider from VOUT to GND and feeding the midpoint to the ADJ node (via a Zener diode or op-amp buffer), output voltages above 8 V can be achieved. However, the internal reference remains fixed; true adjustability requires external feedback topology and compromises line/load regulation performance.
What is the meaning of the 'D' and 'TT5' suffixes in MC7808CDTT5?
In MC7808CDTT5, 'D' denotes the DPAK-3 (TO-252-3) surface-mount package, and 'TT5' specifies tape-and-reel packaging with 2,500 units per reel - standard for automated SMT assembly. The base part 'MC7808C' indicates commercial-grade (0°C to +125°C) operation with ±4% output tolerance, distinguishing it from 'A' (±2%), 'B' (±1.5%), and automotive 'NCV' variants.
MC7808CDTT5 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
MC7808CDTT5 FAQ
1.How can I place an order for MC7808CDTT5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7808CDTT5 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 MC7808CDTT5 reliable?
The price and inventory of MC7808CDTT5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7808CDTT5 is usually 5 days.
3.What payment methods are accepted for MC7808CDTT5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7808CDTT5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7808CDTT5?
MC7808CDTT5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7808CDTT5 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 MC7808CDTT5?
For technical support, including MC7808CDTT5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7808CDTT5 requirements.
6.How does Aetrix verify that MC7808CDTT5 is sourced from the original manufacturer or authorized distributors?
All MC7808CDTT5 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 MC7808CDTT5 meets industry standards.
7.What is the process for return or replacement of MC7808CDTT5?
All MC7808CDTT5 units undergo pre-shipment inspection (PSI). If there is an issue with MC7808CDTT5, 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 MC7808CDTT5 part is unused and in its original packaging.
Return procedure for MC7808CDTT5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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