Overview
The TL431AIDBZT is a precision adjustable shunt regulator produced by Texas Instruments. This three-terminal device is designed to provide a stable and adjustable reference voltage, making it an excellent choice for various power management applications. It offers a wide range of adjustable output voltages from approximately 2.5 V to 36 V, which can be set using two external resistors. The TL431AIDBZT is known for its high accuracy, low output noise, and sharp turn-on characteristic, making it a reliable replacement for Zener diodes in many circuits.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 1% (A grade) | - |
| Adjustable Output Voltage | 2.495 V to 36 V | V |
| Operating Temperature Range | -40°C to 85°C | °C |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Output Impedance | 0.2 Ω (Typical) | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | SOT-23 (DBZ) | - |
| Number of Pins | 3 | - |
| Package Dimensions | Height: 0.95 mm, Width: 1.4 mm (Max), Length: 3.04 mm (Max) | mm |
Key Features
- High accuracy with initial tolerances of 0.5%, 1%, and 2% for different grades
- Adjustable output voltage from approximately 2.5 V to 36 V using two external resistors
- Low output noise and typical output impedance of 0.2 Ω
- Sink-current capability from 1 mA to 100 mA
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes
- Operates over a wide temperature range from -40°C to 85°C
- Surface mount packaging (SOT-23) for easy integration into modern PCB designs
Applications
- Rack server power management
- Industrial AC/DC power supplies
- AC inverter and variable frequency (VF) drives
- Servo drive control modules
- Notebook PC power adapter designs
- On-board regulation and adjustable power supplies
- Switching power supplies
Q & A
- What is the TL431AIDBZT used for? The TL431AIDBZT is used as a precision adjustable shunt regulator in various power management applications.
- What is the adjustable output voltage range of the TL431AIDBZT? The output voltage can be adjusted from approximately 2.5 V to 36 V.
- What are the operating temperature ranges for the TL431AIDBZT? The device operates from -40°C to 85°C.
- What is the typical output impedance of the TL431AIDBZT? The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431AIDBZT? The sink-current capability ranges from 1 mA to 100 mA.
- What package type is the TL431AIDBZT available in? The TL431AIDBZT is available in the SOT-23 (DBZ) package.
- Can the TL431AIDBZT replace Zener diodes in circuits? Yes, the TL431AIDBZT is an excellent replacement for Zener diodes due to its sharp turn-on characteristic and low output noise.
- What are some common applications of the TL431AIDBZT? Common applications include rack server power, industrial AC/DC power supplies, AC inverters, servo drive control modules, and notebook PC power adapters.
- How is the output voltage of the TL431AIDBZT adjusted? The output voltage is adjusted using two external resistors.
- Is the TL431AIDBZT suitable for automotive applications? Yes, the TL431AIDBZT is suitable for automotive, commercial, and military temperature ranges.
