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onsemi MC7805CDTRK
- Part No.:
- MC7805CDTRK
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC7805CDTRK.pdf
- Description:
- IC REG LINEAR 5V 1A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,731
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Product details
Overview
MC7805CDTRK from onsemi is a fixed-output +5.0 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. It delivers stable 5 V power for microcontroller logic rails, sensor interfaces, and industrial control modules with input voltage range of 7.0–20 V DC.
For engineers reviewing the MC7805CDTRK datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (2.0 V at 1.0 A), output voltage tolerance (±2% at 25°C), ripple rejection (62–83 dB at 120 Hz), and thermal performance under sustained load with heatsinking.
Technical Context
The MC7805CDTRK implements a monolithic series-pass transistor architecture with built-in protection circuitry including foldback current limiting and junction temperature sensing. Its internal safe-area compensation dynamically reduces short-circuit current as pass transistor VCE increases, preventing second breakdown during fault conditions.
It operates without external components for basic regulation but requires input bypassing (≥0.33 µF) when located remotely from bulk capacitance. Output capacitance is not required for stability but improves transient response-values below 0.1 µF may cause instability per datasheet guidance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2% at 25°C; maintains 4.75–5.25 V across 5 mA–1.0 A load and 7.0–20 V input |
| Maximum Output Current | 1.0 A continuous; peak up to 2.2 A for short durations with adequate heatsinking |
| Dropout Voltage | 2.0 V at 1.0 A and 25°C; defines minimum headroom needed between input and regulated output |
| Ripple Rejection | 62–83 dB at 120 Hz; suppresses AC line noise and switching supply ripple on input rail |
| Quiescent Current | 3.2–6.5 mA typical; low bias draw enables efficient operation in always-on subsystems |
| Thermal Shutdown Threshold | 150°C junction temperature; automatically disables output to prevent permanent damage |
| Output Noise | 10 µV/V RMS (10 Hz–100 kHz); low-noise performance suitable for analog sensor front-ends |
Pinout & Package
MC7805CDTRK uses the DPAK-3 (TO-252-3) surface-mount package with exposed thermal pad connected to Pin 2 (Ground). The package supports moderate power dissipation with PCB copper area acting as heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input | Unregulated DC input (7.0–20 V); must be ≥2.0 V above output to maintain regulation |
| 2 | Ground | Common reference for input and output; also connects to exposed thermal pad for heat transfer |
| 3 | Output | Stable +5.0 V regulated output; referenced to Pin 2; requires no output capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Enables compact, low-BOM designs for point-of-load regulation without feedback resistors or compensation networks |
| Internal thermal overload protection | Automatically disables output above 150°C junction temperature, enabling robust operation in sealed enclosures |
| Internal short-circuit current limiting | Prevents destructive current flow during output faults; limits to ~0.6 A at 25°C (MC7805C variant) |
| Safe-area compensated output transistor | Reduces short-circuit current as VCE rises, protecting against second breakdown during overvoltage transients |
| 1.5–4% output voltage tolerance options | MC7805CDTRK is the ±2% grade, balancing cost and precision for general-purpose digital logic supply |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering isolated digital input buffers and relay driver logic in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary 5 V local regulator supplying MCU core, GPIO, and optocoupler interface circuits. Use Value: Delivers clean, protected 5 V rail with thermal shutdown and short-circuit immunity-critical for unattended factory-floor operation. | Use Scenario: Regulating 5 V for microcontroller peripherals (CAN transceivers, LIN drivers, EEPROM) in door module ECUs. IC Role / Device Role / Timing Role: Fixed-voltage LDO replacement for legacy discrete regulators; provides stable supply independent of battery voltage sag. Use Value: Withstands automotive load-dump transients when paired with input TVS; meets AEC-Q100 stress requirements via NCV-series compatibility path. |
| Medical Patient Monitor Front-End | Point-of-Sale Terminal Logic Supply |
Use Scenario: Supplying analog sensor signal conditioning (op-amps, ADC references) and low-power display controller in portable diagnostics devices. IC Role / Device Role / Timing Role: Low-noise 5 V source for precision analog stages; output referenced to system ground shared with digital domain. Use Value: 10 µV/V output noise and <1.3 mV load regulation ensure minimal interference with 12-bit+ sensor measurements. | Use Scenario: Providing 5 V to barcode scanner engine, secure element, and touch controller in retail kiosks operating 24/7. IC Role / Device Role / Timing Role: Main logic rail regulator with high reliability and long-term stability for embedded Linux applications. Use Value: ±2% initial accuracy and −0.3 mV/°C temperature coefficient maintain timing margin for USB and SDIO peripherals across 0–70°C ambient. |
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 |
|---|---|---|---|
| LM7805CDT/NOPB | TI part with identical pinout and 5 V output, but ±2% tolerance only at 25°C; wider load regulation (±100 mV vs ±25 mV for MC7805CDTRK at 1.0 A) | Less precise under full-load and temperature variation; lower ripple rejection (55 dB typical vs 62–83 dB) | Select when cost sensitivity outweighs regulation tightness and noise performance |
| NCV7805BDTRKG | onsemi automotive-grade variant with AEC-Q100 qualification, ±1.5% tolerance, and extended temp range (−40°C to +150°C) | Validated for under-hood and safety-critical systems; higher cost and longer lead times | Select for automotive production where PPAP and qualification documentation are mandatory |
Compared with LM7805CDT/NOPB, MC7805CDTRK offers tighter load regulation and superior ripple rejection; compared with NCV7805BDTRKG, it trades automotive qualification for lower cost and standard industrial temperature range (0°C to +125°C).
Availability
MC7805CDTRK is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, and consumer electronics requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for MC7805CDTRK 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 (Nasdaq: ON) 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 fixed-voltage regulator family for local board-level power conversion-emphasizing reliability, integrated protection, and ease of use in cost-sensitive embedded systems.
FAQ
What is the maximum input voltage rating for MC7805CDTRK?
The absolute maximum input voltage for MC7805CDTRK is 35 V DC, but continuous operation is limited to 20 V DC per the recommended operating conditions table. Exceeding 20 V increases power dissipation and thermal stress-especially at full 1.0 A load-so design margins should keep input ≤18 V for reliable long-term operation. The device's 2.0 V dropout means 7.0 V minimum input is required to sustain 5.0 V output.
Does MC7805CDTRK require an input capacitor?
Yes-MC7805CDTRK requires a minimum 0.33 µF input bypass capacitor (tantalum, ceramic, or film) placed as close as possible to Pins 1 and 2. This is mandatory when the regulator is located more than a few inches from bulk input capacitance or when feeding high-dynamic loads. The capacitor stabilizes the input impedance and prevents oscillation due to source inductance; omitting it risks instability or erratic regulation under transient load changes.
Can MC7805CDTRK be used in adjustable-voltage configurations?
Yes-MC7805CDTRK can be configured as an adjustable regulator using external resistors and a Zener diode per Figure 10 in the datasheet, though this deviates from its intended fixed-output role. The internal 5 V reference remains active, so output voltage becomes VOUT = 5 V × (1 + R1/R2) + IADJ × R2. However, regulation accuracy, line/load performance, and thermal behavior differ significantly from dedicated adjustable regulators like LM317, and such use is not production-recommended.
What is the thermal resistance of MC7805CDTRK in DPAK-3 package?
MC7805CDTRK in DPAK-3 (DT suffix) has a junction-to-case thermal resistance (RθJC) of 5.0°C/W and a junction-to-ambient resistance (RθJA) of 65°C/W with standard JEDEC 2-layer PCB layout (1 in² copper pad). Effective thermal performance depends heavily on PCB copper area and airflow; adding thermal vias under the exposed pad reduces RθJA by ~10–15°C/W. At 1.0 A and 12 V input, power dissipation is ~7 W-requiring careful thermal design to stay below 150°C junction limit.
Is MC7805CDTRK RoHS and REACH compliant?
Yes-MC7805CDTRK is a Pb-free device compliant with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The "Pb-Free" marking is confirmed in the datasheet's features section and ordering information. All onsemi commercial-grade MC7800 series parts shipped since 2006 meet these environmental standards, and material declarations are available via onsemi's compliance portal using the full part number MC7805CDTRK.
MC7805CDTRK 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):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 6.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 83dB (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
MC7805CDTRK FAQ
1.How can I place an order for MC7805CDTRK through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7805CDTRK 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 MC7805CDTRK reliable?
The price and inventory of MC7805CDTRK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7805CDTRK is usually 5 days.
3.What payment methods are accepted for MC7805CDTRK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7805CDTRK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7805CDTRK?
MC7805CDTRK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7805CDTRK 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 MC7805CDTRK?
For technical support, including MC7805CDTRK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7805CDTRK requirements.
6.How does Aetrix verify that MC7805CDTRK is sourced from the original manufacturer or authorized distributors?
All MC7805CDTRK 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 MC7805CDTRK meets industry standards.
7.What is the process for return or replacement of MC7805CDTRK?
All MC7805CDTRK units undergo pre-shipment inspection (PSI). If there is an issue with MC7805CDTRK, 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 MC7805CDTRK part is unused and in its original packaging.
Return procedure for MC7805CDTRK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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