Overview
The TL431CDBZT is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its specified thermal stability over a wide range of temperatures. The TL431CDBZT allows for the output voltage to be set to any value between the reference voltage (approximately 2.5V) and 36V using two external resistors. It is particularly useful in applications requiring precise voltage regulation and stability, such as on-board regulation, adjustable power supplies, and switching power supplies.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (DBZ) |
| Pins | 3 |
| Operating Temperature Range (°C) | -40 to 125 |
| Reference Voltage Tolerance at 25°C | 1% (A grade), 2% (Standard grade) |
| Adjustable Output Voltage | Vref (approximately 2.5V) to 36V |
| Typical Output Impedance | 0.2Ω |
| Sink-Current Capability | 1mA to 100mA |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), 2% (Standard grade)
- Adjustable output voltage: Vref (approximately 2.5V) to 36V with two external resistors
- Operation from -40°C to 125°C
- Low output noise and typical output impedance of 0.2Ω
- Sink-current capability: 1mA to 100mA
- Active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes
- Green product with no Sb/Br
Applications
- Rack server power
- Industrial AC/DC power supplies
- AC inverter and VF drives
- Servo drive control modules
- Notebook PC power adapter design
- Power management in automotive, aerospace, defense, and military applications
Q & A
- What is the TL431CDBZT?
The TL431CDBZT is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431CDBZT?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the operating temperature ranges for the TL431CDBZT?
The device operates from -40°C to 125°C.
- What are the reference voltage tolerances available for the TL431CDBZT?
The device is available with reference voltage tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the typical output impedance of the TL431CDBZT?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431CDBZT?
The device can sink currents from 1mA to 100mA.
- What are some common applications for the TL431CDBZT?
Common applications include rack server power, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter design.
- Is the TL431CDBZT a green product?
- What package type is the TL431CDBZT available in?
The device is available in the SOT-23 (DBZ) package.
- How many pins does the TL431CDBZT have?
The device has 3 pins.
