Part A
L7815ABD2T-TR
Semi - conducteurs optiques
- Lifecycle
- Active
- Stock
- 6821 PCS
- Package
- TO-263-3
- Series
- PMIC - régulateur de tension - linéaire
Replacement verdict
Compatible functional replacement candidate
The L7815ABD2T-TR is a viable functional replacement candidate for the L7815CV in most 15V linear regulation applications, with the primary consideration being the surface-mount D2PAK versus through-hole TO-220 package difference. Designers must verify thermal management and PCB layout compatibility before substituting.
Output Voltage
High match
Output Current
High match
Package Type
Validation required
Operating Temperature
High match
Parts at a glance
Part B
L7815CV
Semi - conducteurs optiques
- Lifecycle
- Active
- Stock
- 5691 PCS
- Package
- TO-220
- Series
- PMIC - régulateur de tension - linéaire
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | L7815CV | L7815ABD2T-TR | Why it matters |
|---|---|---|---|
| Output Voltage | 15 V | 15 V | Both regulate to the same nominal 15 V output, so the target rail voltage is identical. |
| Output Current (max) | 1.5 A | 1.5 A | Current capability determines whether the regulator can supply the load without entering current limit. |
| Output Voltage Tolerance | ±4% (standard grade) | ±2% (A grade) | Tighter tolerance improves accuracy of the regulated rail, which matters for precision analog and reference circuits. |
| Dropout Voltage (typ) | 2 V | 2 V | Dropout sets the minimum input-to-output headroom needed to maintain regulation. |
| Package / Mounting | TO-220 (through-hole) | D2PAK / TO-263 (surface-mount) | Different footprints and assembly methods affect PCB layout, thermal design, and whether the parts are drop-in replacements. |
| Operating Junction Temperature Range | 0 °C to 125 °C | -40 °C to 125 °C | Wider temperature range allows operation in industrial and automotive environments where the standard grade may not be specified. |
| Quiescent Current (typ) | 4.3 mA | 4.3 mA | Quiescent current contributes to standby power and thermal budget, especially in always-on supplies. |
| Thermal Shutdown | Yes | Yes | Internal thermal protection prevents device damage under overtemperature or overload conditions. |
| Short-Circuit / Current Limit Protection | Yes | Yes | Built-in current limiting protects the regulator and downstream circuitry during fault conditions. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | L7815ABD2T-TR | L7815CV |
|---|---|---|
| Part Status | Active | Active |
| Output Configuration | Positive | Positive |
| Output Type | Fixed | Fixed |
| Number of Regulators | 1 | 1 |
| Voltage - Input (Max) | 35V | 35V |
| Voltage - Output (Min/Fixed) | 15V | 15V |
| Voltage Dropout (Max) | 2V @ 1A (Typ) | 2V @ 1A (Typ) |
| Current - Output | 1.5A | 1.5A |
| Current - Quiescent (Iq) | 6 mA | 8 mA |
| PSRR | 58dB (120Hz) | 54dB (120Hz) |
| Protection Features | Over Temperature, Short Circuit | Over Temperature, Short Circuit |
| Operating Temperature | -40°C ~ 125°C | 0°C ~ 125°C |
| Mounting Type | Surface Mount | Through Hole |
Frequently asked questions
What are the main differences between the L7815CV and the L7815ABD2T-TR?
The L7815CV is a fixed 15 V positive voltage regulator in a TO-220 package, while the L7815ABD2T-TR is a fixed 15 V positive voltage regulator in a D2PAK (TO-263) package. The L7815ABD2T-TR is supplied in tape-and-reel packaging for automated assembly, whereas the L7815CV is typically supplied in tube or bulk packaging. Both are members of the L78 series and provide a 1.5 A output current capability, but they differ in package, thermal characteristics, and intended mounting style.
Are the L7815CV and L7815ABD2T-TR electrically interchangeable in terms of output voltage and current?
Yes, both devices are fixed 15 V positive regulators with a nominal 1.5 A output current capability. However, electrical interchangeability in a specific application also depends on thermal design, dropout voltage, quiescent current, and package-related power dissipation limits. The L7815ABD2T-TR is a surface-mount D2PAK device, while the L7815CV is a through-hole TO-220 device, so the achievable power dissipation and heatsinking differ.
Can the L7815ABD2T-TR be used as a drop-in replacement for the L7815CV on an existing PCB?
No, a direct drop-in replacement is not possible because the packages are physically different. The L7815CV uses a TO-220 through-hole footprint, while the L7815ABD2T-TR uses a D2PAK surface-mount footprint. The PCB land patterns, mounting method, and thermal relief requirements are different, so a board redesign or adapter would be required.
What is the output current rating of the L7815CV and L7815ABD2T-TR?
Both the L7815CV and L7815ABD2T-TR are rated for a nominal output current of 1.5 A, subject to adequate heatsinking and thermal management. Actual usable output current depends on input voltage, ambient temperature, package thermal resistance, and the resulting junction temperature.
Do the L7815CV and L7815ABD2T-TR have the same pinout?
Both devices use the standard L78 series pinout: pin 1 is input, pin 2 is ground, and pin 3 is output. However, the physical arrangement and lead form differ between the TO-220 package of the L7815CV and the D2PAK package of the L7815ABD2T-TR. The D2PAK tab is typically connected to pin 2 (ground) and also serves as the thermal pad, while the TO-220 tab is connected to pin 2 (ground) as well. Designers must verify the exact package drawing before layout.
Which package is better for high-power dissipation, the L7815CV or the L7815ABD2T-TR?
The L7815CV in the TO-220 package is generally easier to mount on an external heatsink and can achieve lower thermal resistance to ambient when properly heatsinked. The L7815ABD2T-TR in the D2PAK package relies on the PCB copper area as its heatsink, so its power dissipation capability depends heavily on board layout and copper area. For high-power dissipation with a large external heatsink, the TO-220 L7815CV is often more convenient; for surface-mount assemblies with adequate copper, the D2PAK L7815ABD2T-TR can be suitable.
Are the L7815CV and L7815ABD2T-TR both fixed 15 V regulators?
Yes, both are fixed 15 V positive voltage regulators. The L7815CV and L7815ABD2T-TR are part of the L78 series, which provides fixed output voltages. The "15" in the part number indicates a nominal 15 V output.
What are the typical applications for the L7815CV and L7815ABD2T-TR?
Both devices are used for local on-card regulation, logic supply regulation, and general-purpose 15 V power supplies. The L7815CV is commonly used in through-hole and socketed designs, prototyping, and applications where an external heatsink is easy to mount. The L7815ABD2T-TR is commonly used in surface-mount production boards where automated assembly and tape-and-reel packaging are required, provided the PCB copper area is designed for adequate thermal dissipation.
Do the L7815CV and L7815ABD2T-TR have the same thermal shutdown and current limiting features?
Both devices are members of the L78 series and include internal current limiting and thermal shutdown protection as standard features. However, the actual thermal performance and the point at which thermal shutdown is reached depend on the package, mounting, and PCB thermal design. The L7815CV in TO-220 and the L7815ABD2T-TR in D2PAK have different junction-to-ambient thermal resistances, so their behavior under overload or high-temperature conditions will differ in practice.