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onsemi MC7915ACD2TR4G
- Part No.:
- MC7915ACD2TR4G
- Manufacturer:
- onsemi
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MC7915ACD2TR4G.pdf
- Description:
- ANA 1A 15V NEGATIVE VREG
- Quantity:
- Payment:
- Shipping:
Inventory:1,348
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Product details
Overview
MC7915ACD2TR4G from onsemi is a fixed-output negative voltage regulator delivering −15 V at up to 1.0 A, featuring internal thermal shutdown, short-circuit current limiting, and safe-area compensation for rugged operation in industrial power supplies. It uses the D2PAK (TO-263) package with heatsink-connected pin 2 and requires no external components for basic regulation.
For engineers reviewing the MC7915ACD2TR4G datasheet, pinout, applications, or equivalent options, key selection criteria include output voltage tolerance (±2%), dropout voltage (1.3 V at 1.0 A), ripple rejection (60 dB at 120 Hz), thermal resistance (JC = 5.0°C/W), and compatibility with dual-rail op-amp supplies and MECL system biasing.
Technical Context
The MC7915ACD2TR4G implements a monolithic bipolar pass transistor with integrated protection circuitry including current-limiting foldback, thermal overload shutdown triggered at +150°C junction temperature, and safe-area compensation that dynamically reduces short-circuit current as VCE increases. Its design targets stable DC bias generation in analog circuits where negative rail integrity is critical.
It operates across an input voltage range of −17.5 V to −30 V (for 1.0 A load), maintains output regulation under line and load transients per defined test conditions (e.g., 68 mV max load regulation over 5–1000 mA), and delivers low-noise performance (90 µV RMS, 10 Hz–100 kHz) without requiring external compensation capacitors in most layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | −15.0 V ±2% at TJ = +25°C; ensures precise biasing for op-amps and analog front-ends requiring tight negative rail accuracy |
| Output Current | 1.0 A continuous; supports medium-power analog stages and dual-rail systems without external boost transistors |
| Dropout Voltage | 1.3 V at 1.0 A; defines minimum input-to-output differential needed to sustain regulation under full load |
| Ripple Rejection | 60 dB at 120 Hz; suppresses AC ripple from rectified supplies, critical for low-noise signal conditioning |
| Thermal Resistance JC | 5.0°C/W; enables high-power dissipation when mounted on heatsink, supporting >15 W PD with proper thermal interface |
| Line Regulation | 57 mV max over −20 V to −26 V input; quantifies output stability against input supply variation in unregulated DC sources |
| Load Regulation | 40 mV max over 5–1000 mA; specifies output voltage shift due to dynamic load changes in real-world applications |
Pinout & Package
D2PAK (TO-263) surface-mount package with exposed metal tab (pin 2) serving as both electrical connection and thermal path to heatsink. Pin 1 is Ground, pin 2 is Input (VI), pin 3 is Output (VO). Heatsink surface is electrically connected to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Ground | Reference node for internal biasing and feedback; must be low-impedance connection to system ground plane |
| Pin 2 | Input (VI) | Negative input supply terminal; also serves as heatsink mounting surface - electrically tied to input potential |
| Pin 3 | Output (VO) | Regulated −15 V output; connects directly to load and local bypass capacitor (1.0 µF recommended) |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Enables compact, low-BOM-count power designs - only input/output capacitors needed for stability |
| Internal thermal overload protection | Automatic shutdown at +150°C junction temperature prevents catastrophic failure during sustained overload or poor heatsinking |
| Internal short-circuit current limiting | Self-protecting behavior limits fault current to ~1.8 A, avoiding fuse reliance and enabling safe recovery after overload removal |
| Safe-area compensated output transistor | Reduces short-circuit current as VCE rises, preventing second breakdown and improving reliability under transient faults |
| Pb-free D2PAK package | RoHS-compliant surface-mount construction with thermal pad optimized for automated reflow and thermal management |
Applications
| Operational Amplifier Dual Supply | MECL Logic Biasing |
|---|---|
Use Scenario: Powering precision op-amps in instrumentation amplifiers requiring symmetrical ±15 V rails. IC Role / Device Role / Timing Role: Negative rail regulator providing stable −15 V reference for analog signal processing stages. Use Value: Maintains PSRR >60 dB at 120 Hz, minimizing ripple-induced offset drift and preserving amplifier CMRR. | Use Scenario: Generating negative bias for ECL/MECL logic families operating at −5.2 V or −2.0 V reference levels. IC Role / Device Role / Timing Role: Fixed −15 V source feeding intermediate regulators or level-shift networks in high-speed digital systems. Use Value: Delivers 1.0 A with <40 mV load regulation, ensuring consistent logic threshold margins across varying fan-out loads. |
| Industrial Sensor Signal Conditioning | Programmable Logic Controller (PLC) Analog I/O |
Use Scenario: Supplying isolated analog front-ends in pressure, temperature, or strain gauge interfaces. IC Role / Device Role / Timing Role: Primary negative rail generator for ADC drivers and programmable gain amplifiers. Use Value: Low 90 µV RMS noise (10 Hz–100 kHz) avoids degrading effective resolution of 16-bit+ data acquisition systems. | Use Scenario: Providing regulated −15 V to analog input/output modules in modular PLC backplanes. IC Role / Device Role / Timing Role: Local point-of-load regulator converting unregulated −24 V bus to clean −15 V for DACs and sensor excitation. Use Value: Withstands input ripple up to −30 V and sustains 1.0 A output while maintaining ±2% tolerance over 0–125°C junction range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar negative voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM337MDT-ND | Adjustable output (−1.25 V to −37 V); requires two external resistors; lower quiescent current (5 mA vs. 4.4 mA typ) | Used where programmable or non-standard negative voltages are needed; less suitable for fixed −15 V systems due to resistor tolerance sensitivity | Select LM337MDT-ND only if voltage flexibility outweighs BOM simplicity and tolerance risk |
| MC7915CD2TR4G | Same D2PAK package and −15 V output but ±4% tolerance (vs. ±2% for MC7915ACD2TR4G); identical thermal and protection specs | Acceptable in cost-sensitive industrial controls where tighter regulation is not required for functional safety compliance | Choose MC7915CD2TR4G when ±4% output accuracy meets system margin requirements and lowers procurement cost |
Compared with LM337MDT-ND and MC7915CD2TR4G, the MC7915ACD2TR4G offers superior output accuracy (±2%) and zero external component count for fixed −15 V, making it optimal for high-integrity analog power rails where layout simplicity and long-term stability are prioritized over adjustability or lowest unit cost.
Availability
MC7915ACD2TR4G is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) analog I/O modules, and operational amplifier dual-supply designs requiring stable component supply, RoHS compliance, and tape-and-reel packaging for SMT production.
Supply support for MC7915ACD2TR4G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The MC7900 Series was designed specifically to provide robust, drop-in complementary negative-voltage regulation for legacy and new designs using the widely adopted MC7800 positive regulator family - targeting reliability-critical analog and mixed-signal systems.
FAQ
What is the maximum input voltage rating for the MC7915ACD2TR4G?
The MC7915ACD2TR4G has a maximum input voltage rating of −30 Vdc for operation across its full specified temperature range (0°C to +125°C junction). Exceeding this limit risks permanent damage, as confirmed in the Absolute Maximum Ratings table of the official datasheet (Rev. 21, page 2). The device is rated for −26 V typical operation at 1.0 A load.
Does the MC7915ACD2TR4G require input and output capacitors for stable operation?
Yes, the MC7915ACD2TR4G requires a 1.0 µF output capacitor for stability and transient response, and a 0.33 µF input capacitor is recommended when connected via long traces to the power supply filter. These values are specified in the Standard Application section (page 1) and supported by application notes showing instability without them, especially under dynamic load conditions.
What is the thermal resistance from junction to case (θJC) for the MC7915ACD2TR4G?
The thermal resistance from junction to case (θJC) for the MC7915ACD2TR4G is 5.0°C/W, as stated in the Maximum Ratings table (page 2) for Case 936 (D2PAK). This value assumes proper soldering of the exposed tab (pin 2) to a thermally conductive PCB copper area or external heatsink.
Can the MC7915ACD2TR4G be used in parallel to increase output current?
No, the MC7915ACD2TR4G is not designed for parallel operation. Its output voltage tolerance (±2%) and lack of current-sharing features mean paralleling units will cause unequal current distribution and possible thermal runaway. For higher current, use a single higher-rated regulator or add an external pass transistor as shown in Figure 9 of the datasheet.
Is the MC7915ACD2TR4G pin-compatible with TO-220 versions like MC7915ACTG?
No, the MC7915ACD2TR4G (D2PAK) is not pin-compatible with TO-220 versions such as MC7915ACTG. While both share identical pin functions (Gnd/Input/Output), their physical pinouts differ: D2PAK assigns pin 1 = Gnd, pin 2 = Input (heatsink), pin 3 = Output; TO-220 uses pin 1 = Gnd, pin 2 = Input, pin 3 = Output with heatsink attached to pin 2 but electrically isolated. PCB layout redesign is required for substitution.
MC7915ACD2TR4G 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:
- Active
- Output Configuration:
- Negative
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- -35V
- Voltage - Output (Min/Fixed):
- -15V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 8 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-3
MC7915ACD2TR4G FAQ
1.How can I place an order for MC7915ACD2TR4G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7915ACD2TR4G 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 MC7915ACD2TR4G reliable?
The price and inventory of MC7915ACD2TR4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7915ACD2TR4G is usually 5 days.
3.What payment methods are accepted for MC7915ACD2TR4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7915ACD2TR4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7915ACD2TR4G?
MC7915ACD2TR4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7915ACD2TR4G 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 MC7915ACD2TR4G?
For technical support, including MC7915ACD2TR4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7915ACD2TR4G requirements.
6.How does Aetrix verify that MC7915ACD2TR4G is sourced from the original manufacturer or authorized distributors?
All MC7915ACD2TR4G 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 MC7915ACD2TR4G meets industry standards.
7.What is the process for return or replacement of MC7915ACD2TR4G?
All MC7915ACD2TR4G units undergo pre-shipment inspection (PSI). If there is an issue with MC7915ACD2TR4G, 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 MC7915ACD2TR4G part is unused and in its original packaging.
Return procedure for MC7915ACD2TR4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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