My Inquiry
My Account
onsemi MC7808ABTG
- Part No.:
- MC7808ABTG
- Manufacturer:
- onsemi
- Package:
- TO-220-3
- Datasheet:
-
MC7808ABTG.pdf
- Description:
- IC REG LINEAR 8V 1A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,943
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC7808ABTG from onsemi is a fixed-output +8.0 V, 1.0 A linear voltage regulator in TO-220 package with internal thermal shutdown, short-circuit current limiting, and safe-area compensation. It delivers stable output under 5.0 mA–1.0 A load, requires no external components for basic operation, and supports local on-card regulation in industrial power supplies and embedded control systems.
For engineers reviewing the MC7808ABTG datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs (±2% output tolerance, 2.0 V dropout at 1.0 A), thermal performance (RθJA = 92°C/W), ripple rejection (62 dB @ 120 Hz), quiescent current (3.3–6.0 mA), and design guidance for input/output capacitor selection and heatsinking.
Technical Context
The MC7808ABTG employs a monolithic bipolar pass transistor with built-in safe-area compensation to dynamically reduce short-circuit current as VIN–VOUT increases-preventing second breakdown during fault conditions. Its internal bandgap reference and error amplifier maintain ±2% output voltage accuracy over temperature (−40°C to +125°C) and line/load variations.
Thermal overload protection activates at +150°C junction temperature, forcing shutdown until cooldown; recovery is automatic. The device operates with input voltages from 10.6 V to 25 V DC and sustains full 1.0 A output current only when adequately heatsinked-power dissipation is internally limited but thermally dependent.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +8.0 V nominal, ±2% tolerance (7.84–8.16 V at TJ = 25°C); ensures compatibility with 8 V logic rails and analog subsystems requiring tight DC stability. |
| Output Current | 1.0 A continuous (2.2 A peak); supports mid-power analog circuits, microcontroller peripherals, and sensor signal chains without external current boosting. |
| Dropout Voltage | 2.0 V at 1.0 A and 25°C; mandates minimum 10.6 V input for regulated 8 V output-critical for designing input filter and transformer secondary sizing. |
| Ripple Rejection | 62 dB @ 120 Hz, 11.5–21.5 VIN, 500 mA load; suppresses rectified AC ripple in unregulated DC supplies feeding sensitive analog stages. |
| Quiescent Current | 3.3–6.0 mA; low standby draw enables use in battery-backed or energy-conscious systems where idle power matters. |
| Thermal Shutdown | Activates at +150°C junction temperature; protects against sustained overload or inadequate heatsinking-no external thermal sensor required. |
| Short-Circuit Limit | 0.2 A typical (at VIN = 35 V); self-limiting behavior prevents catastrophic failure during output faults-enables robust system-level fault containment. |
Pinout & Package
MC7808ABTG uses the TO-220 package (Case 221AB), with metal tab electrically connected to Pin 2 (Ground). Heatsinking must be applied to the tab via insulating washer or thermal pad if mounting to grounded chassis.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input | Unregulated DC input supply; must exceed 10.6 V for full 1.0 A output and remain ≥2.0 V above VOUT under worst-case ripple. |
| Pin 2 | Ground | Common reference for input and output; also connects to heatsink tab-requires isolation if chassis ground differs from circuit ground. |
| Pin 3 | Output | Regulated +8.0 V output; bypass capacitor (≥0.33 µF) recommended at point-of-load to improve transient response and stability. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Enables drop-in integration into power rails without feedback resistors, compensation networks, or external transistors-reduces BOM count and layout area. |
| Internal thermal overload protection | Automatically disables output above +150°C junction temperature and recovers autonomously-eliminates need for discrete thermal cutoff or reset circuitry. |
| Safe-area compensated pass transistor | Reduces short-circuit current as VCE rises, preventing second breakdown during high-voltage fault conditions-enhances ruggedness in industrial environments. |
| 1.5% to 4% output voltage tolerance options | MC7808ABTG specifies ±2% (B-grade), enabling precise voltage setting for analog references and mixed-signal ICs without post-regulation trimming. |
| Pb-free and RoHS-compliant | Meets global environmental compliance requirements for industrial and consumer electronics manufacturing without lead-based solder concerns. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Powering isolated analog input channels and digital output drivers in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Primary 8 V local regulator supplying ADC references, op-amp rails, and optocoupler LEDs. Use Value: ±2% output tolerance and 62 dB ripple rejection ensure <1 LSB error in 12-bit analog acquisition under noisy factory EMI conditions. |
Use Scenario: Providing stable 8 V rail for microcontroller peripherals, CAN transceiver bias, and interior lighting drivers in body electronics modules. IC Role / Device Role / Timing Role: Fixed-voltage LDO replacement for legacy 78xx designs in AEC-Q100–qualified automotive subsystems. Use Value: Thermal shutdown and safe-area compensation meet ASIL-B functional safety requirements for non-safety-critical power domains. |
| Point-of-Load Power for Legacy Microcontrollers | Test & Measurement Equipment Power Rails |
|
Use Scenario: Delivering clean 8 V to vintage 8-bit microcontrollers (e.g., 8051 derivatives) and associated memory and peripheral ICs. IC Role / Device Role / Timing Role: On-board linear regulator replacing switching solutions where low noise and simplicity are prioritized over efficiency. Use Value: 10 µV/V output noise and <1 mΩ output impedance minimize clock jitter and analog reference drift in timing-sensitive MCU applications. |
Use Scenario: Generating calibrated 8 V bias for precision op-amps, DAC buffers, and sensor excitation circuits in benchtop instruments. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source referenced to system ground for metrology-grade signal conditioning. Use Value: −0.4 mV/°C temperature coefficient and <1.4 mV load regulation (5–1500 mA) enable sub-mV stability across ambient temperature swings. |
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 |
|---|---|---|---|
| LM7808CD2T | ±2% output tolerance, same TO-220 package, but higher RθJA (100°C/W vs. 92°C/W) and lower ripple rejection (55 dB). | Less suitable for high-ambient-temperature industrial enclosures or high-ripple input sources. | Select LM7808CD2T only when cost sensitivity outweighs thermal margin and noise performance requirements. |
| NCV7808BD2TR4G | AEC-Q100 qualified, tighter −40°C to +150°C operating range, identical electrical specs and pinout to MC7808ABTG. | Required for automotive under-hood applications; not necessary for commercial/industrial use. | Choose NCV7808BD2TR4G when automotive qualification, extended temperature range, or PPAP documentation is mandatory. |
Compared with LM7808CD2T, MC7808ABTG offers superior thermal performance and ripple suppression; versus NCV7808BD2TR4G, it provides identical regulation performance at lower cost and without automotive-specific compliance overhead-ideal for industrial and general-purpose designs.
Availability
MC7808ABTG is available at Aetrix Electronics and suitable for industrial control systems, test equipment power supplies, and embedded microcontroller platforms requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MC7808ABTG 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-with leadership in power management, analog, and sensing technologies.
The MC7800 series was designed as a robust, drop-in family of fixed-output linear regulators for local on-card regulation-emphasizing reliability, thermal resilience, and minimal external component count in cost-sensitive embedded systems.
FAQ
What is the maximum input voltage rating for MC7808ABTG?
The absolute maximum input voltage for MC7808ABTG 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 10.6 V to 25 V DC-exceeding 25 V increases power dissipation and thermal stress without functional benefit. Always verify derating curves in Figure 2 for peak current capability at elevated VIN–VOUT.
Does MC7808ABTG require input and output capacitors?
MC7808ABTG does not require output capacitance for stability, but a 0.33 µF or larger capacitor at the input is strongly recommended when the regulator is located far from the main filter capacitor or driving large capacitive loads. An output capacitor (e.g., 0.1–1 µF ceramic) improves transient response and reduces high-frequency noise-though not mandatory for basic regulation. The MC7808ABTG datasheet explicitly states CO is "not needed for stability" but beneficial for dynamic performance.
What is the thermal resistance and heatsinking requirement for MC7808ABTG?
MC7808ABTG has a junction-to-ambient thermal resistance (RθJA) of 92°C/W in standard TO-220 mounting without heatsink. To sustain 1.0 A output at 8 V with 15 V input (7 W dissipation), junction temperature would exceed 150°C without heatsinking. A minimum 10°C/W heatsink is recommended for full-load operation at 50°C ambient-verified using RθJA = RθJC + RθCS + RθSA, where RθJC = 5.0°C/W and interface resistance must be included.
How does the safe-area compensation feature work in MC7808ABTG?
Safe-area compensation in MC7808ABTG dynamically reduces short-circuit current as the voltage across the internal pass transistor (VCE) increases-preventing operation in the second breakdown region. During an output short, current drops from ~0.2 A at low VCE to <0.1 A at high VCE, limiting power dissipation and avoiding destructive thermal runaway. This behavior is intrinsic to the bipolar die design and requires no external circuitry-demonstrated in the MC7808ABTG datasheet's safe-operating-area (SOA) curves.
Is MC7808ABTG pin-compatible with other 78xx-series regulators?
Yes, MC7808ABTG uses the industry-standard TO-220 three-pin configuration (Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output) shared across the entire 78xx family-including 7805, 7812, and 7815 variants. This allows direct substitution in existing layouts when changing output voltage, provided input voltage headroom and thermal design accommodate the new dropout and power dissipation requirements of the selected variant.
MC7808ABTG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- 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):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 62dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
MC7808ABTG FAQ
1.How can I place an order for MC7808ABTG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7808ABTG 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 MC7808ABTG reliable?
The price and inventory of MC7808ABTG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7808ABTG is usually 5 days.
3.What payment methods are accepted for MC7808ABTG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7808ABTG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7808ABTG?
MC7808ABTG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7808ABTG 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 MC7808ABTG?
For technical support, including MC7808ABTG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7808ABTG requirements.
6.How does Aetrix verify that MC7808ABTG is sourced from the original manufacturer or authorized distributors?
All MC7808ABTG 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 MC7808ABTG meets industry standards.
7.What is the process for return or replacement of MC7808ABTG?
All MC7808ABTG units undergo pre-shipment inspection (PSI). If there is an issue with MC7808ABTG, 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 MC7808ABTG part is unused and in its original packaging.
Return procedure for MC7808ABTG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC7808ABTG Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
