Overview
The TL431QDCKTG4 is a precision programmable reference voltage regulator produced by Texas Instruments. It is part of the TL431 and TL432 series, which are three-terminal adjustable shunt regulators known for their thermal stability across various temperature ranges. These devices are widely used in applications requiring precise voltage regulation and are suitable for automotive, commercial, and military environments.
The TL431QDCKTG4 offers adjustable output voltage from the reference voltage (approximately 2.5 V) up to 36 V, using two external resistors. This flexibility makes it an excellent choice for on-board regulation, adjustable power supplies, and switching power supplies, often replacing Zener diodes in many applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage Tolerance at 25°C | - | - | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) | % |
| Adjustable Output Voltage | Vref | - | 36 V | V |
| Operating Temperature Range | -40°C | - | 125°C | °C |
| Typical Temperature Drift | - | 6 mV (C Temp), 14 mV (I Temp, Q Temp) | - | mV |
| Output Impedance | - | 0.2 Ω | - | Ω |
| Sink-Current Capability | 1 mA | - | 100 mA | mA |
| Package Type | - | - | SC70 (DCK) | - |
Key Features
- High precision reference voltage with tolerances of 0.5% (B Grade), 1% (A Grade), and 2% (Standard Grade) at 25°C.
- Adjustable output voltage from Vref (approximately 2.5 V) to 36 V using two external resistors.
- Operation over a wide temperature range from -40°C to 125°C.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability from 1 mA to 100 mA.
- Low output drift versus temperature, ensuring good stability over the entire temperature range.
- Active output circuitry providing a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
Applications
- Rack server power supplies.
- Industrial AC/DC power supplies.
- AC inverter and variable frequency (VF) drives.
- Servo drive control modules.
- Notebook PC power adapter designs.
- Adjustable voltage and current referencing.
- On-board regulation, adjustable power supplies, and switching power supplies.
Q & A
- What is the TL431QDCKTG4? The TL431QDCKTG4 is a precision programmable reference voltage regulator produced by Texas Instruments.
- What are the reference voltage tolerances of the TL431QDCKTG4? The reference voltage tolerances are 0.5% (B Grade), 1% (A Grade), and 2% (Standard Grade) at 25°C.
- What is the adjustable output voltage range of the TL431QDCKTG4? The output voltage can be adjusted from Vref (approximately 2.5 V) to 36 V using two external resistors.
- What is the operating temperature range of the TL431QDCKTG4? The device operates from -40°C to 125°C.
- What is the typical output impedance of the TL431QDCKTG4? The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431QDCKTG4? The sink-current capability ranges from 1 mA to 100 mA.
- What are some common applications of the TL431QDCKTG4? Common applications include rack server power supplies, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
- Can the TL431QDCKTG4 replace Zener diodes in some applications? Yes, the TL431QDCKTG4 can replace Zener diodes in many applications due to its sharp turn-on characteristic and active output circuitry.
- What package type is the TL431QDCKTG4 available in? The TL431QDCKTG4 is available in the SC70 (DCK) package type.
- Is the TL431QDCKTG4 suitable for automotive, commercial, and military applications? Yes, the TL431QDCKTG4 is suitable for these applications due to its specified thermal stability over applicable temperature ranges.
