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onsemi MC7808CD2TG
- Part No.:
- MC7808CD2TG
- Manufacturer:
- onsemi
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MC7808CD2TG.pdf
- Description:
- IC REG LINEAR 8V 1A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,052
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Product details
Overview
MC7808CD2TG from onsemi is a fixed-output +8.0 V, 1.0 A linear voltage regulator in D2PAK-3 (TO-263) package, featuring internal thermal shutdown, short-circuit current limiting, and safe-area compensation. It delivers stable output with ±4% tolerance at 25°C, supports input voltages up to 35 V, and maintains regulation with ≥2.0 V dropout at full load - ideal for industrial power rails and local board-level regulation.
For engineers reviewing the MC7808CD2TG datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, thermal performance data, real-world design constraints (e.g., minimum input headroom, heatsink requirements), and validated alternative options for cost, availability, or automotive-grade upgrades.
Technical Context
The MC7808CD2TG implements a monolithic series-pass transistor architecture with built-in protection circuitry: thermal overload detection triggers shutdown above +150°C junction temperature, while short-circuit current limiting holds peak output at 0.2 A under fault conditions. Safe-area compensation dynamically reduces short-circuit current as pass transistor VCE increases, preventing second breakdown.
It operates without external components for basic regulation but requires ≥0.33 µF input bypass capacitance when located >2 inches from bulk filter. Output stability is independent of output capacitor value, though ≥0.1 µF improves transient response. Ripple rejection is 62 dB at 120 Hz with 11.5–18 V input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +8.0 V nominal, ±4% tolerance at 25°C - ensures compatibility with 8 V logic or analog subsystems requiring tight DC rail accuracy |
| Output Current | 1.0 A continuous, 2.2 A peak - supports moderate-power microcontrollers, sensors, and interface ICs without external boosting |
| Input Voltage Range | 10.5–23 V typical operating range; absolute max 35 V - mandates ≥2.5 V headroom above output for reliable regulation |
| Dropout Voltage | 2.0 V at 1.0 A and 25°C - defines minimum input-to-output differential needed to sustain regulation under full load |
| Ripple Rejection | 62 dB at 120 Hz (11.5–18 VIN) - suppresses AC line ripple and switching noise from upstream converters |
| Quiescent Current | 3.3–8.0 mA - low standby draw enables use in always-on systems without excessive idle power loss |
| Thermal Shutdown | Activates at +150°C junction temperature - protects device during overload or inadequate heatsinking |
Pinout & Package
D2PAK-3 (TO-263) surface-mount package with exposed thermal pad connected to Pin 2 (Ground). Requires PCB copper pour for thermal management; RJA = 65°C/W with 1 in² 2-oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input | Unregulated DC input; must be ≥10.5 V and ≤35 V; bypass with ≥0.33 µF capacitor near pin |
| Pin 2 | Ground | Common reference for input and output; connects to thermal pad - must be solidly tied to PCB ground plane |
| Pin 3 | Output | Regulated +8.0 V supply; no mandatory output capacitor, but ≥0.1 µF improves load transient response |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Enables drop-in integration into power rails without feedback resistors, compensation networks, or error amplifiers |
| Internal thermal overload protection | Auto-recovery shutdown prevents permanent damage during sustained overloads or poor heatsinking |
| Internal short-circuit current limiting | Clamps fault current to 0.2 A at 35 V input - limits power dissipation and avoids catastrophic failure |
| Safe-area compensated output transistor | Prevents secondary breakdown by reducing short-circuit current as VCE rises - enhances ruggedness |
| Pb-free and RoHS-compliant | Meets environmental compliance requirements for industrial and consumer electronics manufacturing |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Powering isolated digital I/O drivers, optocouplers, and ADC reference circuits in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Local +8 V rail generator for signal conditioning and level-shifting circuitry. Use Value: Maintains regulation across wide ambient (-40°C to +85°C) and input ripple (120 Hz, 2 VPP) per EN 61000-4-4. |
Use Scenario: Supplying microcontroller peripherals (CAN transceivers, LIN drivers, sensor interfaces) in non-safety-critical vehicle subsystems. IC Role / Device Role / Timing Role: Secondary regulated supply derived from 12 V battery rail. Use Value: Withstands load dump pulses up to 35 V and meets AEC-Q100 stress test requirements when used with NCV7808 variant. |
| Point-of-Sale Terminal Power | Legacy Industrial Instrumentation |
|
Use Scenario: Providing clean +8 V for thermal print head drivers and smart card readers in retail kiosks. IC Role / Device Role / Timing Role: Fixed-voltage source for high-current pulsed loads with fast transient recovery. Use Value: Peak output current capability of 2.2 A handles 500 ms print head activation surges without brownout. |
Use Scenario: Replacing aging 7808 variants in analog panel meters, process controllers, and 4–20 mA loop-powered devices. IC Role / Device Role / Timing Role: Drop-in replacement for legacy TO-220 7808 regulators with improved thermal performance. Use Value: D2PAK-3 package offers 30% lower RJA than TO-220, enabling higher ambient operation without heatsink 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 |
|---|---|---|---|
| NCV7808BD2TR4G | Automotive-grade version with AEC-Q100 qualification, tighter ±2% output tolerance, and extended -40°C to +150°C operating range. | Required for automotive body electronics; supports PPAP documentation and zero-defect manufacturing traceability. | Select when functional safety or automotive qualification is mandated; same pinout and thermal profile as MC7808CD2TG. |
| LM7808CD2T | TI variant with identical electrical specs but different quiescent current behavior (typ. 5.5 mA vs. 3.3 mA) and slightly lower ripple rejection (60 dB). | Suitable for cost-sensitive industrial designs where TI supply chain preference exists. | Verify thermal performance in high-ambient environments; may require larger heatsink due to higher IQ drift. |
Compared with MC7808CD2TG, NCV7808BD2TR4G adds automotive reliability and tighter tolerance at higher cost, while LM7808CD2T offers alternate sourcing with minor trade-offs in efficiency and noise immunity - both retain identical D2PAK-3 footprint and basic functionality.
Availability
MC7808CD2TG is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and point-of-sale hardware requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MC7808CD2TG 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 specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
The MC7800 series was designed for robust, low-cost local regulation in harsh environments - emphasizing thermal resilience, fault tolerance, and ease of implementation without external compensation.
FAQ
What is the maximum input voltage rating for MC7808CD2TG?
The absolute maximum input voltage for MC7808CD2TG is 40 Vdc, but the recommended operating range is 10.5–23 Vdc for optimal regulation and thermal performance. Exceeding 35 Vdc risks triggering internal protection or degrading long-term reliability, per onsemi's Maximum Ratings table.
Does MC7808CD2TG require an output capacitor for stability?
No, MC7808CD2TG is internally compensated and does not require an output capacitor for stability. However, adding ≥0.1 µF ceramic or tantalum capacitor at the output significantly improves transient response to step-load changes - especially critical in microcontroller or sensor applications.
Can MC7808CD2TG be used in automotive applications?
MC7808CD2TG is not AEC-Q100 qualified and lacks automotive-specific stress testing. For automotive use, select the NCV7808BD2TR4G variant instead - it shares the same D2PAK-3 package and electrical baseline but includes PPAP support, extended temperature range, and automotive-grade screening.
What thermal management is required for MC7808CD2TG at 1.0 A output?
At 1.0 A with 20 V input, MC7808CD2TG dissipates ~12 W. With RJA = 65°C/W and TJMAX = +150°C, ambient must stay below +55°C using 1 in² 2-oz copper pour. For higher ambient, add a clip-on heatsink or increase copper area to reduce RJA below 40°C/W.
How does MC7808CD2TG handle short-circuit faults?
MC7808CD2TG limits short-circuit current to 0.2 A (typ.) when input is 35 Vdc. Combined with thermal shutdown at +150°C, this prevents destructive failure. After fault removal, the device auto-recovers - no manual reset is needed. Safe-area compensation ensures current decreases as pass transistor VCE rises, avoiding second breakdown.
MC7808CD2TG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Bulk
- 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:
- D2PAK-3
MC7808CD2TG FAQ
1.How can I place an order for MC7808CD2TG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7808CD2TG 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 MC7808CD2TG reliable?
The price and inventory of MC7808CD2TG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7808CD2TG is usually 5 days.
3.What payment methods are accepted for MC7808CD2TG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7808CD2TG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7808CD2TG?
MC7808CD2TG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7808CD2TG 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 MC7808CD2TG?
For technical support, including MC7808CD2TG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7808CD2TG requirements.
6.How does Aetrix verify that MC7808CD2TG is sourced from the original manufacturer or authorized distributors?
All MC7808CD2TG 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 MC7808CD2TG meets industry standards.
7.What is the process for return or replacement of MC7808CD2TG?
All MC7808CD2TG units undergo pre-shipment inspection (PSI). If there is an issue with MC7808CD2TG, 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 MC7808CD2TG part is unused and in its original packaging.
Return procedure for MC7808CD2TG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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