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onsemi SCD7815CTG
- Part No.:
- SCD7815CTG
- Manufacturer:
- onsemi
- Package:
- TO-220-3
- Datasheet:
-
SCD7815CTG.pdf
- Description:
- IC REG LINEAR 15V 1A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,211
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Product details
Overview
SCD7815CTG from onsemi is a 15 V, 1.0 A fixed-output linear voltage regulator in TO-220-3 (Case 221AB) package with internal thermal shutdown, short-circuit current limiting, and safe-area compensation. It delivers stable 15 V output across 5.0 mA–1.0 A load, supports input voltages up to 35 V, maintains ±2% output tolerance at 25°C, and operates from 0°C to +125°C junction temperature - used for local regulation in industrial power supplies and embedded control modules.
For engineers reviewing the SCD7815CTG datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, thermal performance data, real-world design constraints (e.g., 2.0 V dropout at 1.0 A), and validated alternative parts for drop-in or functionally comparable use in fixed-voltage DC power rails.
Technical Context
The SCD7815CTG implements a monolithic NPN pass transistor architecture with integrated current-limiting circuitry that reduces short-circuit current as pass-device VCE increases. Its safe-area compensation ensures reliable operation under transient overloads without external components.
Thermal protection activates at +150°C junction temperature, and internal biasing maintains quiescent current ≤6.0 mA across line/load variations. Ripple rejection reaches 60 dB at 120 Hz with 18.5–28.5 V input, and output impedance remains ≤1.2 mΩ at 1 kHz - enabling stable regulation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 15.0 V nominal, ±2% tolerance at 25°C; 14.4–15.6 V over full load/temperature range - ensures compatibility with 15 V logic and analog subsystems. |
| Output Current | 1.0 A continuous, 2.2 A peak - sufficient for powering microcontrollers, sensors, and interface ICs without external current boosting. |
| Dropout Voltage | 2.0 V at 1.0 A and 25°C - requires minimum 17 V input for regulated 15 V output, critical for designing input capacitor sizing and transformer selection. |
| Ripple Rejection | 60 dB at 120 Hz (18.5–28.5 V input) - suppresses rectified AC ripple in unregulated DC inputs, reducing need for post-regulation filtering. |
| Quiescent Current | 3.5–6.0 mA - enables low standby power in always-on systems; changes ≤0.5 mA over full load range. |
| Thermal Resistance | Junction-to-case: 5.0°C/W; junction-to-ambient: 65°C/W - mandates heatsink for >1.5 W dissipation in ambient >50°C. |
| Operating Temperature | 0°C to +125°C junction - qualified for industrial control cabinets and motor drive auxiliary supplies. |
Pinout & Package
SCD7815CTG uses the standard TO-220-3 (Case 221AB) package with metal tab electrically connected to Pin 2 (Ground). Heatsinking surface must be isolated or grounded per system safety requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input | Unregulated DC input; must exceed output by ≥2.0 V; bypassed with ≥0.33 µF capacitor near pin for stability. |
| Pin 2 | Ground | Common reference for input and output; metal tab is internally connected - requires isolation if chassis ground differs. |
| Pin 3 | Output | Regulated 15 V output; no output capacitor required for stability but recommended for transient response improvement. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained regulation with built-in feedback, eliminating need for external resistors or capacitors in basic configurations. |
| Internal thermal overload protection | Shuts down output at +150°C junction temperature and auto-recovers when cooled - prevents permanent damage during sustained overload. |
| Output transistor safe-area compensation | Dynamically reduces short-circuit current as VCE rises, protecting the pass device during output faults without latch-up. |
| 2% output voltage tolerance | Tighter initial accuracy than standard 4% variants - reduces margining requirements in precision analog or ADC reference supply designs. |
| Pb-free TO-220 package | RoHS-compliant lead finish and packaging - meets environmental compliance for industrial and automotive-qualified systems. |
Applications
| Industrial PLC Power Rails | Motor Drive Auxiliary Supplies |
|---|---|
|
Use Scenario: Powers I/O modules, communication interfaces, and microcontroller cores inside programmable logic controllers operating in 0–70°C enclosures. IC Role / Device Role / Timing Role: Primary 15 V local regulator converting 24 VDC bus to clean, low-noise supply for digital and analog circuitry. Use Value: Delivers 1.0 A with 60 dB ripple rejection and ±2% tolerance - eliminates need for secondary LDOs and simplifies BOM. |
Use Scenario: Supplies gate drivers, current-sense amplifiers, and MCU peripherals in three-phase inverter drives exposed to EMI and thermal cycling. IC Role / Device Role / Timing Role: Fixed-voltage linear regulator providing isolated 15 V bias for high-side driver ICs and op-amps. Use Value: Safe-area compensation prevents latch-up during IGBT short-circuit events; thermal shutdown protects against heatsink failure. |
| Test Equipment Signal Conditioning | Medical Diagnostic Sensor Interfaces |
|
Use Scenario: Powers precision op-amps and DACs in benchtop multimeters and signal generators requiring ultra-low noise and drift. IC Role / Device Role / Timing Role: Low-noise 15 V source with 10 µV/V output noise (10 Hz–100 kHz) feeding analog front-end stages. Use Value: Output impedance ≤1.2 mΩ at 1 kHz minimizes interaction with sensitive feedback networks and improves settling time. |
Use Scenario: Supplies isolated analog sensor signal chains (e.g., pressure, temperature transducers) in portable diagnostic devices. IC Role / Device Role / Timing Role: Safety-isolated 15 V rail for analog signal conditioning prior to ADC sampling. Use Value: 0°C to +125°C operation supports extended calibration cycles; ±0.001%/°C tempco ensures measurement stability over clinical operating range. |
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 |
|---|---|---|---|
| LM7815CDT/NOPB | Same 15 V/1.0 A rating, but higher quiescent current (4.5–8.0 mA), lower ripple rejection (55 dB), and wider output tolerance (±4%). | Lacks safe-area compensation; less robust under short-circuit stress in high-reliability systems. | Lower-cost option where thermal fault resilience is non-critical and tighter output tolerance is not required. |
| MC7815CD2TR4G | Identical 15 V/1.0 A spec, same TO-220 package, but rated for −40°C to +125°C (vs. 0°C to +125°C for SCD7815CTG). | Broader temperature qualification enables use in outdoor or automotive-adjacent environments. | Select when extended cold-start capability or AEC-Q200 alignment is needed; otherwise identical functional behavior. |
Compared with LM7815CDT/NOPB, SCD7815CTG offers superior short-circuit resilience and tighter output accuracy; versus MC7815CD2TR4G, it trades extended low-temperature operation for optimized cost and industrial-grade thermal performance.
Availability
SCD7815CTG is available at Aetrix Electronics and suitable for industrial PLC power rails, motor drive auxiliary supplies, and test equipment signal conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SCD7815CTG 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SCD7800 series was designed specifically for ruggedized fixed-voltage regulation in industrial control and power conversion systems - emphasizing thermal robustness, fault tolerance, and minimal external component count.
FAQ
What is the maximum input voltage for SCD7815CTG?
The absolute maximum input voltage for SCD7815CTG is 40 Vdc, but the recommended operating range is up to 35 Vdc. Exceeding 35 Vdc risks exceeding safe power dissipation limits even at light loads - especially when ambient temperature exceeds 50°C or heatsinking is inadequate. Always verify worst-case power dissipation using the 5.0°C/W junction-to-case thermal resistance.
Does SCD7815CTG require an input bypass capacitor?
Yes, SCD7815CTG requires a minimum 0.33 µF input bypass capacitor placed directly across Pins 1 and 2 with shortest possible leads. This capacitor stabilizes regulation under fast load transients and suppresses high-frequency noise from upstream sources. Tantalum or ceramic types with low ESR are preferred; electrolytic capacitors may cause instability due to higher ESR.
Can SCD7815CTG be used in adjustable-output configurations?
Yes, SCD7815CTG can be configured as an adjustable regulator using external resistive feedback, as shown in Figure 9 of the datasheet. However, the minimum output voltage achievable is 2.0 V above the internal 15 V reference - i.e., ≥17 V - and external components introduce additional error sources. For true wide-range adjustability, dedicated adjustable regulators like LM317 are more appropriate.
What is the short-circuit current limit of SCD7815CTG?
The short-circuit current limit of SCD7815CTG is 0.2 A at 25°C ambient, as specified under "Short Circuit Current Limit (TA = 25°C)" in the Electrical Characteristics table. This value decreases with rising junction temperature due to safe-area compensation - ensuring the pass transistor remains within SOA during sustained faults without destructive failure.
Is SCD7815CTG pin-compatible with standard 78xx series regulators?
Yes, SCD7815CTG uses the industry-standard TO-220-3 pinout (Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output) and matches mechanical and electrical footprints of legacy 7815 regulators. It is a direct replacement for applications requiring enhanced thermal protection and tighter output tolerance - provided the 0°C to +125°C operating range meets system requirements.
SCD7815CTG 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):
- 15V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 58dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
SCD7815CTG FAQ
1.How can I place an order for SCD7815CTG through Aetrix?
Please submit a Request for Quotation (RFQ) for SCD7815CTG 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 SCD7815CTG reliable?
The price and inventory of SCD7815CTG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCD7815CTG is usually 5 days.
3.What payment methods are accepted for SCD7815CTG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCD7815CTG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCD7815CTG?
SCD7815CTG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCD7815CTG 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 SCD7815CTG?
For technical support, including SCD7815CTG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCD7815CTG requirements.
6.How does Aetrix verify that SCD7815CTG is sourced from the original manufacturer or authorized distributors?
All SCD7815CTG 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 SCD7815CTG meets industry standards.
7.What is the process for return or replacement of SCD7815CTG?
All SCD7815CTG units undergo pre-shipment inspection (PSI). If there is an issue with SCD7815CTG, 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 SCD7815CTG part is unused and in its original packaging.
Return procedure for SCD7815CTG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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