Overview
The TL431AIDBVRE4 is a precision adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 and TL432 family of devices, which are known for their thermal stability and adjustable output voltage. These three-terminal regulators can be set to any output voltage between approximately 2.5V and 36V using two external resistors. The TL431AIDBVRE4 is particularly useful in applications requiring high precision and stability over a wide temperature range.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (Vref) | 2.440 | 2.495 | 2.550 | mV |
| Reference Voltage Tolerance at 25°C | - | - | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Adjustable Output Voltage | - | - | 2.5V to 36V | 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 |
Key Features
- High precision reference voltage with tolerances of 0.5%, 1%, and 2% at 25°C for B, A, and standard grades, respectively.
- Adjustable output voltage from approximately 2.5V to 36V 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.
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
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.
- On-board regulation, adjustable power supplies, and switching power supplies.
Q & A
- What is the TL431AIDBVRE4? The TL431AIDBVRE4 is a precision adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431AIDBVRE4? The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the temperature ranges for the TL431AIDBVRE4? The device operates from -40°C to 125°C.
- What are the reference voltage tolerances for the TL431AIDBVRE4? The tolerances are 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the typical output impedance of the TL431AIDBVRE4? The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431AIDBVRE4? The sink-current capability ranges from 1 mA to 100 mA.
- In what applications is the TL431AIDBVRE4 commonly used? It is commonly used in rack server power supplies, industrial AC/DC power supplies, AC inverters, servo drive control modules, and notebook PC power adapter designs.
- Can the TL431AIDBVRE4 replace Zener diodes in some applications? Yes, it can replace Zener diodes due to its sharp turn-on characteristic and active output circuitry.
- What is the significance of the different temperature grades (C, I, Q) for the TL431AIDBVRE4? The different grades (C, I, Q) indicate the operating temperature ranges: 0°C to 70°C for C, -40°C to 85°C for I, and -40°C to 125°C for Q.
- Is there any specific design tool available for the TL431AIDBVRE4? Yes, Texas Instruments provides the TL431CALC spreadsheet to calculate component parameters for desired output voltages.
