Overview
The L7815CP is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78 series. This regulator is available in various packages including TO-220, TO-220FP, D²PAK, and DPAK, making it versatile for a wide range of applications. The L7815CP is designed to provide local on-card regulation, eliminating the issues associated with single-point regulation. It features internal current limiting, thermal shutdown, and safe area protection, making it highly reliable and robust.
Key Specifications
| Parameter | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | TJ = 25 °C | 14.7 | 15 | 15.3 | V |
| Output Current (IO) | Internally limited | - | - | 1.5 A | A |
| Input Voltage (VI) | For VO = 15 V | - | - | 35 V | V |
| Thermal Resistance Junction-Case (RthJC) | TO-220FP | - | - | 5 °C/W | °C/W |
| Thermal Resistance Junction-Ambient (RthJA) | TO-220FP | - | - | 60 °C/W | °C/W |
| Dropout Voltage (Vd) | IO = 1 A, TJ = 25 °C | - | - | 2 V | V |
| Output Noise Voltage (eN) | TA = 25 °C, B = 10 Hz to 100 kHz | - | - | 10 µV/VO | µV/VO |
| Output Resistance (RO) | f = 1 kHz | - | - | 19 mΩ | mΩ |
| Short Circuit Current (Isc) | VI = 35 V, TA = 25 °C | - | - | 0.2 A | A |
| Short Circuit Peak Current (Iscp) | TJ = 25 °C | - | - | 2.2 A | A |
| Output Voltage Drift (∆VO/∆T) | - | -1 | - | - | mV/°C |
Key Features
- High Current Capability: Up to 1.5 A output current.
- Fixed Output Voltage: 15 V with a tolerance of ±2% for the 'A' version.
- Thermal Protection: Internal thermal shutdown and safe area protection.
- Short Circuit Protection: Internal current limiting and short circuit peak current protection.
- Low Dropout Voltage: 2 V at 1 A output current.
- Low Output Noise: 10 µV/VO from 10 Hz to 100 kHz.
- High Ripple Rejection: Up to 54 dB at 120 Hz.
- Wide Operating Temperature Range: 0 to 125 °C for 'C' versions and -40 to 125 °C for 'AB' versions.
Applications
- Local On-Card Regulation: Eliminates distribution problems associated with single-point regulation.
- Power Supplies: Suitable for use in various power supply designs requiring stable output voltages.
- Industrial Control Systems: Used in control systems that require reliable voltage regulation.
- Consumer Electronics: Found in consumer electronics such as audio equipment, TVs, and other appliances.
- Automotive Systems: Used in automotive systems where robust voltage regulation is necessary.
Q & A
- What is the output voltage of the L7815CP?
The output voltage of the L7815CP is 15 V with a tolerance of ±2% for the 'A' version.
- What is the maximum output current of the L7815CP?
The maximum output current of the L7815CP is up to 1.5 A.
- What are the package options for the L7815CP?
The L7815CP is available in TO-220, TO-220FP, D²PAK, and DPAK packages.
- Does the L7815CP have thermal protection?
Yes, the L7815CP has internal thermal shutdown and safe area protection.
- What is the dropout voltage of the L7815CP?
The dropout voltage of the L7815CP is 2 V at 1 A output current.
- What is the ripple rejection of the L7815CP?
The ripple rejection of the L7815CP is up to 54 dB at 120 Hz.
- What is the operating temperature range of the L7815CP?
The operating temperature range of the L7815CP is 0 to 125 °C for 'C' versions and -40 to 125 °C for 'AB' versions.
- What are some common applications of the L7815CP?
The L7815CP is commonly used in local on-card regulation, power supplies, industrial control systems, consumer electronics, and automotive systems.
- Does the L7815CP have short circuit protection?
Yes, the L7815CP has internal current limiting and short circuit peak current protection.
- What is the minimum load current required for regulation?
The minimum load current required for regulation is 5 mA.
