The MC7815BDTRKG from onsemi is an MC7800-series fixed positive linear voltage regulator providing a 15V regulated output. It is intended for local, on-card voltage regulation and general DC power-supply applications. With adequate thermal management, the device supports an output-current level of 1A or more.
This part uses the MC7815B electrical grade. Output voltage is specified from 14.4V to 15.6V at a 25°C junction temperature. Across the stated input, load, temperature, and power-dissipation conditions, the regulated output range is 14.25V to 15.75V.
The regulator has a 2.0V typical dropout voltage at 1A, so the input normally needs to remain approximately 2V above the required 15V output. The specified B-grade regulation range uses input voltages from approximately 17.5V to 30V, while the absolute maximum input-voltage rating is 35V.
Typical quiescent current is 3.5mA, with an 8mA specified maximum. Typical ripple rejection is 58dB, and typical output-noise voltage is 10μV per volt of output voltage over the stated measurement bandwidth.
Integrated protection features include thermal-overload shutdown, internal short-circuit current limiting, and output-transistor safe-area compensation. These protections improve robustness, although input-to-output differential voltage and thermal dissipation must still be controlled in the final design.
The MC7815BDTRKG is supplied in a three-terminal DPAK surface-mount package. Pin 1 is input, pin 2 is ground, and pin 3 is output; the exposed heatsink surface is also connected to ground. It is specified for a junction-temperature range of −40°C to +125°C and supplied lead-free on tape and reel with 2,500 units per reel.
Key Specifications
- Manufacturer: onsemi
- Manufacturer Part Number: MC7815BDTRKG
- Device Type: Fixed Positive Linear Voltage Regulator
- Number of Outputs: 1
- Nominal Output Voltage: 15V
- Output Range at 25°C: 14.4V to 15.6V
- Full Specified Output Range: 14.25V to 15.75V
- Output-Current Class: 1A
- Typical Dropout Voltage: 2.0V at 1A
- Recommended Regulation Input Range: Approximately 17.5V to 30V
- Absolute Maximum Input Voltage: 35V
- Typical Quiescent Current: 3.5mA
- Maximum Quiescent Current: 8mA
- Typical Ripple Rejection: 58dB
- Typical Short-Circuit Current Limit: 0.2A
- Typical Peak Output Current: 2.2A
- Protection Features: Thermal Shutdown, Short-Circuit Limiting and Safe-Area Compensation
- Specified Junction Temperature: −40°C to +125°C
- Maximum Junction Temperature: +150°C
- Storage Temperature: −65°C to +150°C
- Junction-to-Case Thermal Resistance: 5°C/W
- Package: DPAK-3
- Mounting Type: Surface Mount
- Pin Configuration: Input, Ground and Output
- Exposed Tab Connection: Ground
- Packaging: Tape and Reel
- Standard Reel Quantity: 2,500 Units
- Environmental Classification: Lead-Free
Typical Applications
Suitable for industrial control boards, communication equipment, instrumentation, consumer electronics, power modules, and embedded systems requiring a regulated 15V positive supply. It can also power operational amplifiers, sensor interfaces, relay-control circuits, and other 15V loads.
Because this is a linear regulator, power dissipation is approximately equal to the input-to-output voltage difference multiplied by load current. At 24V input and 1A output, the regulator would dissipate approximately 9W, which generally requires substantial thermal management or a lower input voltage, reduced load current, or switching preregulator.
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