Overview
The TL431ACDRG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 series, known for its specified thermal stability over a wide range of temperature conditions, including automotive, commercial, and military applications. This device allows for adjustable output voltage settings between the reference voltage (approximately 2.5V) and 36V using two external resistors. The TL431ACDRG4 is characterized by its sharp turn-on characteristic, making 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 | 0°C to 70°C (TL431C), -40°C to 85°C (TL431I), -40°C to 125°C (TL431Q) | °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 |
| Cathode Voltage | 37 V (Maximum) | V |
| Operating Junction Temperature | 150 °C (Maximum) | °C |
| Package Type | SOIC (D) with 8 pins |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability ranging from 1 mA to 100 mA.
- Low dynamic output impedance, typically 0.22 Ω.
- Equivalent full-range temperature coefficient of 50 ppm/°C (Typical).
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
Applications
- On-board regulation and adjustable power supplies.
- Switching power supplies and servo drive control modules.
- Rack server power and industrial AC/DC power supplies.
- AC inverter and VF drives.
- Notebook PC power adapter designs and digital voltmeters.
- Op-amp circuitry and other precision voltage reference applications.
Q & A
- What is the TL431ACDRG4?
The TL431ACDRG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431ACDRG4?
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 TL431ACDRG4?
The device is characterized for operation from 0°C to 70°C (TL431C), -40°C to 85°C (TL431I), and -40°C to 125°C (TL431Q).
- What is the typical output impedance of the TL431ACDRG4?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431ACDRG4?
The sink-current capability ranges from 1 mA to 100 mA.
- What are some common applications of the TL431ACDRG4?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and servo drive control modules.
- Can the TL431ACDRG4 replace Zener diodes in some applications?
Yes, the TL431ACDRG4 is an excellent replacement for Zener diodes due to its sharp turn-on characteristic.
- What is the maximum cathode voltage for the TL431ACDRG4?
The maximum cathode voltage is 37 V.
- What is the maximum operating junction temperature for the TL431ACDRG4?
The maximum operating junction temperature is 150 °C.
- In what package type is the TL431ACDRG4 available?
The TL431ACDRG4 is available in an SOIC (D) package with 8 pins.
