Overview
The TL431BCPWG4 is an adjustable precision shunt regulator produced by Texas Instruments. This device is part of the TL431 family, known for its high precision and adjustable output voltage. The TL431BCPWG4 is particularly useful in applications requiring stable voltage regulation, such as on-board regulation, adjustable power supplies, and switching power supplies. It offers a reference voltage of approximately 2.5V and can be adjusted to output voltages ranging from Vref to 36V using two external resistors.
Key Specifications
| Characteristic | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade) | % |
| Adjustable Output Voltage | Vref to 36V | V |
| Operating Temperature Range | −40°C to 125°C (Q grade) | °C |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) | mV |
| Output Impedance | 0.2Ω (typical) | Ω |
| Sink-Current Capability | 1mA to 100mA | mA |
| Cathode to Anode Voltage | 37V | V |
| Operating Junction Temperature | 150°C | °C |
| Package Type | TSSOP | |
| Number of Pins | 8 |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- High Precision: Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- Low Output Noise: Features low output noise, making it suitable for noise-sensitive applications.
- Sharp Turn-On Characteristic: Active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Wide Operating Temperature Range: Operates from −40°C to 125°C, depending on the grade.
- Low Output Impedance: Typical output impedance of 0.2Ω.
- High Sink-Current Capability: Can sink currents from 1mA to 100mA.
Applications
- On-Board Regulation: Used for local voltage regulation on circuit boards.
- Adjustable Power Supplies: Ideal for applications requiring adjustable output voltages.
- Switching Power Supplies: Used in switching power supplies for voltage regulation.
- Replacement for Zener Diodes: Often used as a replacement for Zener diodes due to its sharp turn-on characteristic and high precision.
Q & A
- What is the reference voltage of the TL431BCPWG4?
The reference voltage is approximately 2.5V.
- What is the adjustable output voltage range of the TL431BCPWG4?
The output voltage can be adjusted from Vref (approximately 2.5V) to 36V using two external resistors.
- What are the temperature grades available for the TL431BCPWG4?
The device is available in grades characterized for operation from 0°C to 70°C (C grade), −40°C to 85°C (I grade), and −40°C to 125°C (Q grade).
- What is the typical output impedance of the TL431BCPWG4?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431BCPWG4?
The device can sink currents from 1mA to 100mA.
- What package type is the TL431BCPWG4 available in?
The TL431BCPWG4 is available in a TSSOP package.
- How many pins does the TL431BCPWG4 have?
The device has 8 pins.
- What are some common applications of the TL431BCPWG4?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and as a replacement for Zener diodes.
- What is the operating junction temperature of the TL431BCPWG4?
The operating junction temperature is up to 150°C.
- Is the TL431BCPWG4 RoHS compliant?
Yes, the TL431BCPWG4 is RoHS compliant and lead-free.
