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STMicroelectronics L7815ACD2T-TR
- Part No.:
- L7815ACD2T-TR
- Manufacturer:
- STMicroelectronics
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
L7815ACD2T-TR.pdf
- Description:
- IC REG LINEAR 15V 1.5A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:484
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Product details
Overview
L7815ACD2T-TR from STMicroelectronics is a three-terminal positive linear voltage regulator delivering a fixed 15 V output with up to 1.5 A continuous current, ±2 % output voltage tolerance (A version), thermal overload protection, short-circuit protection, and safe operating area (SOA) protection. It operates across 0 to 125 °C junction temperature and is commonly used in industrial power supplies, local on-card regulation for microcontroller subsystems, and embedded control modules requiring stable low-noise DC power.
For engineers reviewing the L7815ACD2T-TR datasheet, L7815ACD2T-TR pinout, L7815ACD2T-TR application, or L7815ACD2T-TR equivalent, key selection considerations include dropout voltage (2 V @ 1 A), load regulation (≤100 mV over 5 mA–1 A), supply voltage rejection (58 dB @ 120 Hz), output resistance (19 mΩ), and thermal resistance (RthJC = 3 °C/W in D²PAK).
Technical Context
This device implements a monolithic series-pass linear regulator architecture with internal current limiting, thermal shutdown, and SOA protection-enabling robust operation without external protection circuitry. Its feedback loop maintains regulation under varying line (VI = 17.5–30 V) and load (IO = 5 mA–1.5 A) conditions across its full operating temperature range.
The L7815ACD2T-TR uses a standard three-pin configuration (Input, Ground, Output) and requires only two external capacitors (CI = 0.33 µF, CO = 0.1 µF) for stability. Its 2 V dropout enables use with input rails as low as 17 V while sustaining 15 V output at 1 A, making it suitable for post-regulation in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 15 V ±2 % (guaranteed over 0–125 °C junction temp; ensures stable MCU/ASIC core rail) |
| Max Output Current | 1.5 A continuous (with adequate heatsinking; supports motor drivers and sensor interfaces) |
| Dropout Voltage | 2 V @ 1 A, 25 °C (defines minimum VI = 17 V for full-load 15 V regulation) |
| Line Regulation | ≤150 mV (VI = 17.9–30 V, IO = 500 mA; limits output shift from input ripple or variation) |
| Load Regulation | ≤100 mV (IO = 5 mA to 1 A; maintains voltage accuracy across dynamic load steps) |
| Supply Rejection | 58 dB @ 120 Hz (attenuates AC ripple from unregulated DC sources like bridge rectifiers) |
| Quiescent Current | 4.4–6 mA (low standby draw; suitable for always-on monitoring circuits) |
| Thermal Shutdown | Integrated (protects against sustained overload or insufficient heatsinking) |
Pinout & Package
Supplied in D²PAK (TO-263) surface-mount package with exposed thermal pad for enhanced heat dissipation; RthJC = 3 °C/W enables >1 A operation with minimal PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Input) | Voltage input terminal | Accepts unregulated DC (17.5–30 V); must be decoupled with ≥0.33 µF ceramic capacitor |
| 2 (Ground) | Reference and return path | Common reference for input/output; connects to thermal pad for optimal heat transfer |
| 3 (Output) | Regulated voltage output | Delivers stable 15 V; requires ≥0.1 µF ceramic capacitor for high-frequency stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-output precision | ±2 % tolerance over full temperature range ensures compatibility with 15 V logic and analog subsystems without trimming |
| Thermal overload protection | Automatic shutdown below 160 °C junction temp prevents permanent damage during transient overloads |
| Short-circuit current limit | 0.2 A continuous / 2.2 A peak limits fault energy and avoids trace fusing during output shorts |
| SOA protection | Prevents secondary breakdown of internal pass transistor under simultaneous high-voltage/high-current stress |
| Low output noise | 10 µV/V RMS (10 Hz–100 kHz) minimizes interference in sensitive analog signal chains |
Applications
| Industrial PLC Power Rail | Automotive Body Control Module |
|---|---|
Use Scenario: Local 15 V supply for I/O expansion cards and relay drivers in programmable logic controllers. IC Role / Device Role / Timing Role: Primary post-regulator converting 24 V bus to clean 15 V for analog front-ends and optocoupler interfaces. Use Value: Built-in thermal and short-circuit protection eliminates need for external fuse or resettable PTC, reducing BOM count and board space. | Use Scenario: Powering microcontroller peripherals (CAN transceivers, LIN drivers, sensor ADCs) in body electronics. IC Role / Device Role / Timing Role: Local point-of-load regulator supplying 15 V to mixed-signal ICs from vehicle battery (12 V nominal, up to 16 V cranking). Use Value: 2 V dropout allows reliable operation even during cold-crank events where input dips to ~17 V, maintaining system uptime. |
| Test Equipment Signal Conditioning | Medical Diagnostic Sensor Interface |
Use Scenario: Biasing precision op-amps and DACs in benchtop multimeters and waveform analyzers. IC Role / Device Role / Timing Role: Low-noise, low-drift 15 V source for reference buffers and analog signal paths. Use Value: 10 µV/V output noise and −1 mV/°C drift ensure measurement repeatability across ambient temperature shifts. | Use Scenario: Powering photodiode amplifiers and analog front-ends in portable ultrasound or ECG devices. IC Role / Device Role / Timing Role: Regulated 15 V rail for low-power analog signal conditioning prior to digitization. Use Value: Internal SOA and short-circuit protection prevent latch-up or damage during probe disconnection or ESD events. |
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 |
|---|---|---|---|
| LM7815CD2T | ±2 % tolerance, TO-263 package, but no extended temperature grade (0–125 °C vs. L7815ACD2T-TR's guaranteed 0–125 °C) | Not qualified for extended-temp industrial environments; lower SVR (55 dB) | Use only in commercial-temperature applications with relaxed ripple rejection needs. |
| MC7815CD2TG | ±4 % tolerance, same D²PAK package, higher quiescent current (8 mA), no guaranteed extended-temp performance | Higher output drift (−2 mV/°C) and looser initial accuracy reduce suitability for precision analog rails | Acceptable for cost-sensitive non-critical digital logic rails where 15 V ±4 % is sufficient. |
Compared with LM7815CD2T and MC7815CD2TG, the L7815ACD2T-TR offers tighter initial accuracy, superior supply rejection, and guaranteed operation across the full industrial temperature range-making it the preferred choice for mission-critical analog and control applications demanding long-term stability.
Availability
L7815ACD2T-TR is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, test equipment, and medical diagnostics requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for L7815ACD2T-TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The L78 series belongs to ST's legacy positive voltage regulator IC product line, engineered for rugged, low-cost, drop-in local regulation in space-constrained and thermally demanding environments.
FAQ
What is the minimum input voltage required for full-load regulation?
The L7815ACD2T-TR requires a minimum input voltage of 17 V to maintain 15 V output at 1 A load, based on its 2 V dropout specification at 25 °C. At elevated temperatures or higher currents, derating is recommended-consult thermal data (RthJC = 3 °C/W) and maximum junction temperature (125 °C) to determine safe operating area.
Can this regulator be used without an input bypass capacitor?
No. A minimum 0.33 µF ceramic capacitor must be placed between Input and Ground, within 1 cm of the device pins, to prevent oscillation and ensure stability. Omitting it risks high-frequency instability, output overshoot, and potential damage during line transients-per STMicroelectronics' DS0422 layout guidelines.
How does thermal performance differ between D²PAK and TO-220 packages?
The D²PAK (L7815ACD2T-TR) has RthJC = 3 °C/W versus 5 °C/W for TO-220, enabling ~40 % higher power dissipation before thermal shutdown. This allows 1.5 A operation with smaller PCB copper area, whereas TO-220 requires larger heatsinks for equivalent current handling.
Is the output voltage adjustable using external resistors?
No-the L7815ACD2T-TR is a fixed-output regulator. While the base L78 series can be configured as adjustable using external resistors (per datasheet Figure 4), this specific variant lacks the adjust pin and is internally trimmed to 15 V. For adjustable output, select the LM317 or L78Lxx series with external feedback.
L7815ACD2T-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 1.5A
- Current - Quiescent (Iq):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 58dB (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
L7815ACD2T-TR FAQ
1.How can I place an order for L7815ACD2T-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for L7815ACD2T-TR 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 L7815ACD2T-TR reliable?
The price and inventory of L7815ACD2T-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L7815ACD2T-TR is usually 5 days.
3.What payment methods are accepted for L7815ACD2T-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L7815ACD2T-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L7815ACD2T-TR?
L7815ACD2T-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L7815ACD2T-TR 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 L7815ACD2T-TR?
For technical support, including L7815ACD2T-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L7815ACD2T-TR requirements.
6.How does Aetrix verify that L7815ACD2T-TR is sourced from the original manufacturer or authorized distributors?
All L7815ACD2T-TR 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 L7815ACD2T-TR meets industry standards.
7.What is the process for return or replacement of L7815ACD2T-TR?
All L7815ACD2T-TR units undergo pre-shipment inspection (PSI). If there is an issue with L7815ACD2T-TR, 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 L7815ACD2T-TR part is unused and in its original packaging.
Return procedure for L7815ACD2T-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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