Overview
The TL431BIDCKTG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 series, known for its thermal stability over a wide range of temperatures, including automotive, commercial, and military environments. The device allows for adjustable output voltage settings between approximately 2.5V and 36V using two external resistors. This feature, combined with its sharp turn-on characteristic, makes it an excellent replacement for Zener diodes in various applications.
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 36V | V |
| Operating Temperature Range | −40°C to 125°C | °C |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) | mV |
| Output Impedance | 0.2Ω | Ω |
| Sink-Current Capability | 1mA to 100mA | mA |
| Package Type | SOT-SC70 (DCK) | |
| Pins | 6 | |
| Package Quantity | 250 (Carrier, SMALL T&R) |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Operation from −40°C to 125°C, ensuring stability across various temperature ranges.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability ranging from 1mA to 100mA.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Replacement for Zener diodes in various circuits.
Q & A
- What is the adjustable output voltage range of the TL431BIDCKTG4?
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 TL431BIDCKTG4?
The device operates from −40°C to 125°C.
- What are the reference voltage tolerances available for the TL431BIDCKTG4?
The device is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- What is the typical output impedance of the TL431BIDCKTG4?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431BIDCKTG4?
The sink-current capability ranges from 1mA to 100mA.
- What are some common applications of the TL431BIDCKTG4?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and as a replacement for Zener diodes.
- What package type and pin count does the TL431BIDCKTG4 come in?
The device comes in a SOT-SC70 (DCK) package with 6 pins.
- How many devices are typically included in a package?
The package quantity is 250 (Carrier, SMALL T&R).
- What is the significance of the sharp turn-on characteristic of the TL431BIDCKTG4?
The sharp turn-on characteristic makes the device an excellent replacement for Zener diodes in many applications.
- How does the TL431BIDCKTG4 ensure thermal stability?
The device is designed with specified thermal stability over applicable automotive, commercial, and military temperature ranges.
