Overview
The TL431AQDBZT is a three-terminal adjustable precision shunt regulator produced by Texas Instruments. This device is designed to provide a precise DC voltage output, making it an excellent choice for various power management and regulation applications. It operates over a wide temperature range and offers adjustable output voltage, making it versatile for different circuit requirements.
Key Specifications
| Attribute | Value |
|---|---|
| Shunt Type | Shunt |
| Output Type | Adjustable |
| Accuracy | ±1% (A grade), ±0.5% (B grade), ±2% (Standard grade) |
| Reference Voltage | Approximately 2.5 V |
| Output Voltage | 2.5 V to 36 V |
| Output Impedance | 0.2 Ω (Typical) |
| Cathode Current | 0.6 mA to 100 mA |
| Power Dissipation | 950 mW |
| Operating Temperature Range | -40°C to +125°C |
| Package Style | SOT-23 (SC-59, TO-236) |
| Mounting Method | Surface Mount |
Key Features
- Programmable output voltage up to 36 V, set by two external resistors
- Reference voltage tolerance of 1% (A grade), 0.5% (B grade), and 2% (Standard grade) at 25°C
- Low output noise and typical output impedance of 0.2 Ω
- Sink-current capability from 1 mA to 100 mA
- Active output circuitry with a sharp turn-on characteristic, making it a good replacement for Zener diodes
- Operates over a wide temperature range from -40°C to 125°C
- Compact SOT-23 package for surface mount applications
Applications
- Shunt regulator
- Precision current limiter
- Precision constant current sink
- Isolated feedback loop for Switch Mode Power Supply (SMPS)
- On-board regulation, adjustable power supplies, and switching power supplies
Q & A
- What is the TL431AQDBZT?
The TL431AQDBZT is a three-terminal adjustable precision shunt regulator produced by Texas Instruments.
- What is the output voltage range of the TL431AQDBZT?
The output voltage can be set to any value between approximately 2.5 V and 36 V using two external resistors.
- What is the reference voltage of the TL431AQDBZT?
The reference voltage is approximately 2.5 V.
- What is the operating temperature range of the TL431AQDBZT?
The device operates over a temperature range from -40°C to +125°C.
- What is the typical output impedance of the TL431AQDBZT?
The typical output impedance is 0.2 Ω.
- What are the common applications of the TL431AQDBZT?
Common applications include shunt regulation, precision current limiting, precision constant current sinking, and isolated feedback loops for SMPS.
- What package style does the TL431AQDBZT come in?
The device comes in a SOT-23 (SC-59, TO-236) package.
- How is the TL431AQDBZT mounted?
The device is mounted using surface mount technology.
- What is the power dissipation capability of the TL431AQDBZT?
The device has a power dissipation capability of 950 mW.
- Can the TL431AQDBZT replace Zener diodes in some applications?
Yes, the TL431AQDBZT can replace Zener diodes in many applications due to its active output circuitry and sharp turn-on characteristic.
