Overview
The TL431AQDBVTG4 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 specified thermal stability over a wide range of temperatures. These devices are suitable for various applications, including onboard regulation, adjustable power supplies, and switching power supplies, making them excellent replacements for Zener diodes. The TL431AQDBVTG4 operates from −40°C to 125°C, ensuring reliability in diverse environmental conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) | % |
| Adjustable Output Voltage | Vref to 36 V | V |
| Operating Temperature Range | −40°C to 125°C | °C |
| Typical Temperature Drift | 6 mV (C Temp), 14 mV (I Temp, Q Temp) | mV |
| Typical Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | SOT-23-5 (DBV) |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade)
- Adjustable output voltage: Vref to 36 V
- Operation from −40°C to 125°C
- Typical temperature drift: 6 mV (C Temp), 14 mV (I Temp, Q Temp)
- Low output noise
- Typical output impedance: 0.2 Ω
- Sink-current capability: 1 mA to 100 mA
- Active output circuitry with a sharp turn-on characteristic
Applications
- Rack server power
- Industrial AC/DC power supplies
- AC inverter and variable frequency (VF) drives
- Servo drive control modules
- Notebook PC power adapter designs
- Onboard regulation and adjustable power supplies
- Switching power supplies
Q & A
- What is the TL431AQDBVTG4?
The TL431AQDBVTG4 is a precision programmable reference voltage regulator from Texas Instruments, part of the TL431 and TL432 series.
- What is the operating temperature range of the TL431AQDBVTG4?
The device operates from −40°C to 125°C.
- What is the adjustable output voltage range of the TL431AQDBVTG4?
The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V using two external resistors.
- What are the reference voltage tolerances for the TL431AQDBVTG4?
The reference voltage tolerances are 0.5% (B Grade), 1% (A Grade), and 2% (Standard Grade) at 25°C.
- What is the typical output impedance of the TL431AQDBVTG4?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431AQDBVTG4?
The sink-current capability ranges from 1 mA to 100 mA.
- In what types of applications is the TL431AQDBVTG4 commonly used?
It is commonly used in rack server power, industrial AC/DC power supplies, AC inverters, servo drive control modules, and notebook PC power adapter designs.
- What package type is the TL431AQDBVTG4 available in?
The TL431AQDBVTG4 is available in the SOT-23-5 (DBV) package.
- Why is the TL431AQDBVTG4 a good replacement for Zener diodes?
It provides a very sharp turn-on characteristic and low output noise, making it an excellent replacement for Zener diodes in many applications.
- What are the key advantages of using the TL431AQDBVTG4?
The key advantages include specified thermal stability, adjustable output voltage, low output noise, and a sharp turn-on characteristic.
