My Inquiry
My Account
onsemi MC7808BD2TR4
- Part No.:
- MC7808BD2TR4
- Manufacturer:
- onsemi
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MC7808BD2TR4.pdf
- Description:
- IC REG LINEAR 8V 1A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC7808BD2TR4 from onsemi is a fixed-output linear voltage regulator delivering +8.0 V at up to 1.0 A, featuring internal thermal shutdown, short-circuit current limiting, and safe-area compensation for robust local regulation in industrial power supplies and embedded control systems.
For engineers reviewing the MC7808BD2TR4 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed ±2% output tolerance at 25°C, 2.0 V dropout voltage at 1.0 A, 62 dB ripple rejection at 120 Hz, and D2PAK-3 surface-mount package compatibility with heatsink-integrated ground terminal.
Technical Context
This monolithic IC employs a bipolar pass transistor with built-in safe-area compensation to dynamically reduce short-circuit current as VCE increases-preventing second breakdown during fault conditions. It operates without external components for basic regulation but supports adjustable output configurations via external resistors and transistors.
The device integrates thermal overload protection that disables output when junction temperature exceeds +150°C, and internal current limiting holds peak short-circuit current to 0.2 A at 35 V input. Its quiescent current remains stable (3.3 mA typical) across 10.5–25 V input range and full load variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +8.0 V nominal, ±2% tolerance at 25°C - ensures stable logic supply for 8 V–based microcontrollers and analog circuitry |
| Output Current | 1.0 A continuous, 2.2 A peak - supports moderate-power loads like sensors, op-amps, and small solenoids |
| Dropout Voltage | 2.0 V at 1.0 A and 25°C - requires minimum 10.0 V input for regulated 8 V output under full load |
| Ripple Rejection | 62 dB at 120 Hz, 11.5–18 V input - suppresses rectified AC noise in unregulated DC bus applications |
| Thermal Shutdown | Activates at +150°C junction temperature - protects against sustained overloads without external sensing |
| Short-Circuit Limit | 0.2 A at 35 V input - limits fault energy to prevent PCB trace damage during output shorts |
| Quiescent Current | 3.3 mA typical - enables low standby power in always-on industrial monitoring nodes |
Pinout & Package
D2PAK-3 (TO-263-3) surface-mount package with exposed metal tab thermally and electrically connected to Pin 2 (Ground). Heatsinking is mandatory for >500 mA continuous operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input | Unregulated DC input (10.5–35 V); requires ≥0.33 µF bypass capacitor near pin for stability |
| 2 | Ground | Common reference for input and output; tab connection provides low-impedance thermal path to heatsink |
| 3 | Output | Regulated +8.0 V output; no output capacitor required for stability, but 0.1 µF improves transient response |
Key Features
| Feature | Design Value |
|---|---|
| No external components needed | Enables compact, low-BOM-cost regulation without feedback resistors or compensation networks |
| Internal safe-area compensation | Reduces short-circuit current as pass transistor VCE rises - prevents thermal runaway during overvoltage faults |
| Thermal overload protection | Auto-recovering shutdown at +150°C junction temperature - eliminates need for external thermal sensors |
| 1.5% to 4% output tolerance options | MC7808BD2TR4 uses B-grade (±2%) tolerance - balances cost and precision for non-critical 8 V rails |
| Pb-free and RoHS-compliant | Meets environmental compliance requirements for industrial and automotive end equipment |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Powering digital isolators, level shifters, and optocouplers in modular I/O racks with shared 24 V DC bus. IC Role / Device Role / Timing Role: Local +8 V rail generator for interface ICs requiring clean, isolated supply independent of main system voltage. Use Value: Eliminates need for separate isolated DC/DC converters by providing stable 8 V from noisy 24 V field bus with integrated fault protection. |
Use Scenario: Supplying microcontroller peripherals (CAN transceivers, LIN drivers, sensor ADCs) in door module ECUs. IC Role / Device Role / Timing Role: Fixed-voltage LDO replacement for legacy 78xx designs in AEC-Q100–qualified systems. Use Value: Delivers 1.0 A at +8 V with thermal shutdown and short-circuit limiting - meets automotive load-dump and reverse-battery immunity requirements when paired with front-end protection. |
| Point-of-Load Regulation for Legacy Systems | Test & Measurement Equipment Power Rails |
|
Use Scenario: Generating dedicated +8 V bias for op-amp signal chains in retrofit instrumentation using existing 12–24 V chassis supplies. IC Role / Device Role / Timing Role: Low-noise linear regulator with 10 µV/V output noise - preserves signal integrity in precision analog stages. Use Value: Provides 62 dB line ripple rejection and <1.4 mV load regulation - maintains <0.02% gain error in 12-bit data acquisition front ends. |
Use Scenario: Powering FPGA configuration memory, clock buffers, and DAC reference circuits in benchtop analyzers. IC Role / Device Role / Timing Role: Stable, low-drift +8 V source with −0.4 mV/°C tempco - minimizes reference voltage drift across operating temperature range. Use Value: Enables <±0.05% output stability from −40°C to +125°C - critical for calibration-grade measurement accuracy. |
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, TO-263 package, but higher 8 mA quiescent current and lower 56 dB ripple rejection | Less suitable for battery-backed or low-quiescent systems; acceptable for cost-sensitive industrial boards | Select when footprint compatibility with LM78xx design reuse is prioritized over efficiency or noise performance |
| NCV7808BD2TR4 | Identical electrical specs, but AEC-Q100 qualified and PPAP-capable with automotive-specific process controls | Required for production automotive modules; not necessary for commercial/industrial use | Choose only if automotive qualification and extended temperature support (−40°C to +150°C) are mandated |
Compared with LM7808CD2T, MC7808BD2TR4 offers 3.3 mA vs. 8 mA quiescent current and 62 dB vs. 56 dB ripple rejection - enabling longer battery life and cleaner analog rails. Compared with NCV7808BD2TR4, it lacks automotive qualification but reduces cost and lead time for non-automotive applications.
Availability
MC7808BD2TR4 is available at Aetrix Electronics and suitable for industrial control systems, test equipment power supplies, and embedded sensor nodes requiring stable component supply with consistent parametric performance across manufacturing lots.
Supply support for MC7808BD2TR4 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 as a drop-in replacement for legacy 78xx regulators, emphasizing ruggedness, thermal resilience, and ease of use in harsh environments - especially where reliability under overload and temperature stress is critical.
FAQ
What is the maximum input voltage rating for MC7808BD2TR4?
The absolute maximum input voltage for MC7808BD2TR4 is 35 V DC, as specified in the Maximum Ratings table. Operation above this voltage risks permanent damage due to junction breakdown. For reliable long-term use, the recommended maximum is 30 V DC with adequate heatsinking to maintain junction temperature below +150°C.
Does MC7808BD2TR4 require an input bypass capacitor?
Yes - MC7808BD2TR4 requires a minimum 0.33 µF input bypass capacitor placed directly across Pins 1 and 2. This capacitor stabilizes the regulator under dynamic load changes and suppresses high-frequency noise from upstream sources. Tantalum or ceramic types with low ESR are preferred; placement must minimize trace inductance.
Can MC7808BD2TR4 be used in adjustable output configurations?
Yes - MC7808BD2TR4 can be configured as an adjustable regulator using external resistors and a pass transistor, as shown in Figure 10 of the datasheet. However, its internal feedback network is optimized for fixed 8 V operation; adjustable use sacrifices tolerance, line/load regulation, and thermal performance unless carefully compensated.
What is the thermal resistance junction-to-case for MC7808BD2TR4?
The thermal resistance junction-to-case (RθJC) for MC7808BD2TR4 in the D2PAK-3 package is 5.0°C/W. This value assumes proper soldering of the exposed tab to a copper heatsink plane. Effective thermal design requires calculating total junction-to-ambient resistance including PCB copper area and optional external heatsink to ensure TJ stays ≤150°C at full 1.0 A load.
Is MC7808BD2TR4 pin-compatible with other 78xx-series regulators in D2PAK-3?
Yes - MC7808BD2TR4 shares identical pinout (Input/Ground/Output), mechanical footprint, and thermal pad layout with all onsemi 78xx-series D2PAK-3 regulators (e.g., MC7805BD2TR4, MC7812BD2TR4). This allows direct substitution within the same family when only output voltage differs, provided input voltage and thermal margins are verified.
MC7808BD2TR4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- 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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-3
MC7808BD2TR4 FAQ
1.How can I place an order for MC7808BD2TR4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7808BD2TR4 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 MC7808BD2TR4 reliable?
The price and inventory of MC7808BD2TR4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7808BD2TR4 is usually 5 days.
3.What payment methods are accepted for MC7808BD2TR4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7808BD2TR4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7808BD2TR4?
MC7808BD2TR4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7808BD2TR4 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 MC7808BD2TR4?
For technical support, including MC7808BD2TR4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7808BD2TR4 requirements.
6.How does Aetrix verify that MC7808BD2TR4 is sourced from the original manufacturer or authorized distributors?
All MC7808BD2TR4 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 MC7808BD2TR4 meets industry standards.
7.What is the process for return or replacement of MC7808BD2TR4?
All MC7808BD2TR4 units undergo pre-shipment inspection (PSI). If there is an issue with MC7808BD2TR4, 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 MC7808BD2TR4 part is unused and in its original packaging.
Return procedure for MC7808BD2TR4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC7808BD2TR4 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…
