Overview
The UA7812CKTER is a fixed positive voltage regulator from Texas Instruments, part of the UA78xx series. This regulator is designed to provide a stable output voltage of 12 volts and is suitable for a wide range of applications. It features a 3-terminal configuration, making it easy to integrate into various electronic systems. The UA7812CKTER is known for its high power-dissipation capability, internal thermal-overload protection, and short-circuit current limiting, which enhance its reliability and safety in operation.
Key Specifications
| Parameter | Test Conditions | Unit | Min | Max | |
|---|---|---|---|---|---|
| Output Voltage | IO = 5 mA to 1 A, VI = 14.5 V to 27 V | V | 11.5 | 12 | 12.5 |
| Input Voltage Regulation | VI = 16 V to 22 V | mV | 10 | - | 240 |
| Ripple Rejection | VI = 15 V to 25 V, f = 120 Hz | dB | 55 | - | 71 |
| Output Voltage Regulation | IO = 5 mA to 1.5 A | mV | 12 | - | 240 |
| Output Resistance | f = 1 kHz | Ω | 0.018 | - | - |
| Temperature Coefficient of Output Voltage | IO = 5 mA | mV/°C | -1 | - | - |
| Output Noise Voltage | f = 10 Hz to 100 kHz | μV | 75 | - | - |
| Dropout Voltage | IO = 1 A | V | 2 | - | - |
| Bias Current | 25°C | mA | 4.3 | - | 8 |
| Short-Circuit Output Current | 25°C | mA | 350 | - | - |
| Peak Output Current | 25°C | A | 2.2 | - | - |
Key Features
- 3-Terminal Regulator: Simple and easy to use in a variety of applications.
- High Power-Dissipation Capability: Can handle high power requirements effectively.
- Internal Thermal-Overload Protection: Protects the device from overheating.
- Internal Short-Circuit Current Limiting: Limits current in case of a short circuit.
- Output Transistor Safe-Area Compensation: Ensures safe operation of the output transistor.
- No Output Capacitor Needed for Stability: Stable operation without the need for an external output capacitor.
Applications
- On-card Regulation: Suitable for on-card voltage regulation in various electronic devices.
- Portable Devices: Ideal for use in portable electronics due to its compact size and efficiency.
- Computing & Servers: Used in computing systems and servers for reliable voltage regulation.
- Telecommunications: Applied in telecommunications equipment for stable voltage supply.
Q & A
- What is the output voltage of the UA7812CKTER?
The output voltage of the UA7812CKTER is 12 volts. - What is the maximum output current of the UA7812CKTER?
The maximum output current is up to 1.5 A. - Does the UA7812CKTER have internal thermal protection?
Yes, it has internal thermal-overload protection. - What is the dropout voltage of the UA7812CKTER?
The dropout voltage is 2 volts at an output current of 1 A. - Is an external output capacitor required for stability?
No, an external output capacitor is not needed for stability. - What are the typical applications of the UA7812CKTER?
It is used in on-card regulation, portable devices, computing and servers, and telecommunications. - What is the ripple rejection of the UA7812CKTER?
The ripple rejection is 55 to 71 dB at a frequency of 120 Hz. - What is the output noise voltage of the UA7812CKTER?
The output noise voltage is 75 μV from 10 Hz to 100 kHz. - What is the short-circuit output current of the UA7812CKTER?
The short-circuit output current is 350 mA at 25°C. - What is the peak output current of the UA7812CKTER?
The peak output current is 2.2 A at 25°C.
