Overview
The TL431IPG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its high precision and thermal stability across a wide range of temperatures. The TL431IPG4 is particularly suited for applications requiring a stable voltage reference and adjustable output voltage.
It operates within a temperature range of -40°C to 85°C, making it suitable for various automotive, commercial, and industrial environments. The device can be set to output any voltage between approximately 2.5V and 36V using two external resistors, providing flexibility in circuit design.
Key Specifications
| Characteristic | 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 85°C | °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 |
| Package Type | 8-Pin PDIP (PG4) | - |
| Thermal Resistance, Junction-to-Ambient | 114 °C/W (for PDIP package) | °C/W |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between 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: Ensures stable operation in noise-sensitive applications.
- Low Output Impedance: Typical output impedance of 0.2Ω.
- Wide Temperature Range: Operates from -40°C to 85°C, making it suitable for various environments.
- Sharp Turn-On Characteristic: Active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
Applications
- On-Board Regulation: Used for local voltage regulation on circuit boards.
- Adjustable Power Supplies: Suitable for designing adjustable power supplies with high precision.
- Switching Power Supplies: Used in switching power supplies to provide a stable reference voltage.
- Measurement and Control Systems: Used in various measurement and control systems requiring a stable voltage reference.
Q & A
- What is the TL431IPG4 used for?
The TL431IPG4 is used as a three-terminal adjustable shunt regulator, providing a stable voltage reference and adjustable output voltage in various electronic circuits.
- What is the adjustable output voltage range of the TL431IPG4?
The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the temperature ranges for the TL431IPG4?
The device operates from -40°C to 85°C.
- What are the initial tolerance grades available for the TL431IPG4?
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 TL431IPG4?
The typical output impedance is 0.2Ω.
- Can the TL431IPG4 replace Zener diodes in some applications?
Yes, the TL431IPG4 can replace Zener diodes due to its sharp turn-on characteristic and stable operation.
- What is the sink-current capability of the TL431IPG4?
The sink-current capability ranges from 1mA to 100mA.
- What package type is the TL431IPG4 available in?
The TL431IPG4 is available in an 8-Pin PDIP (PG4) package.
- What are some common applications of the TL431IPG4?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and measurement and control systems.
- How does the TL431IPG4 ensure thermal stability?
The device has specified thermal stability over applicable automotive, commercial, and military temperature ranges, ensuring low output drift versus temperature.
