Overview
The TL431ILPG, produced by onsemi, is a programmable precision reference voltage regulator. It operates as a shunt regulator, capable of providing both positive and negative reference voltages. The TL431ILPG is highly versatile, allowing for an adjustable output voltage from 2.5V to 36V using two external resistors. This adjustability makes it suitable for a wide range of electronic designs, from low-power mobile devices to high-voltage industrial systems. The device is known for its high performance, low dynamic output impedance, and temperature stability, making it a reliable choice for various applications.
Key Specifications
| Characteristic | Symbol | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Reference Input Voltage | Vref | V | 2.44 | 2.495 | 2.55 |
| Output Voltage Range | Vout | V | 2.5 | - | 36 |
| Sink Current Capability | IK | mA | 1.0 | - | 100 |
| Dynamic Output Impedance | ZKA | Ω | 0.22 | - | 0.5 |
| Operating Junction Temperature | TJ | °C | -40 | - | 125 |
| Operating Ambient Temperature Range | TA | °C | -40 | - | 85 |
Key Features
- Programmable Output Voltage: Adjustable output voltage from 2.5V to 36V using two external resistors.
- Low Dynamic Output Impedance: 0.22 Ω typical, ensuring minimal resistance and stability at the output.
- Temperature Stability: Operates efficiently within a temperature range of -40°C to +125°C, making it suitable for extreme environmental conditions.
- High Precision: Voltage reference tolerance of ±0.4% typical at 25°C, and options for 1% and 2% precision for exact voltage references.
- Low Output Noise Voltage: Ensures clear and stable signals in sensitive electronic circuits.
- AEC-Q100 Qualified: Meets rigorous automotive standards, affirming its durability and reliability in vehicular settings.
Applications
- Precision Switching Power Supplies: Used for feedback control and voltage regulation in switching power supplies.
- Linear Regulated Power Supplies: Provides stable reference voltages in linear regulated power supplies.
- Voltage Comparators: Utilized in circuits where a precise voltage comparison is necessary.
- Power Supply Monitors: Monitors and regulates power supply voltages to ensure stability and safety.
- Delay Circuits and Constant Current Sources: Used in various timing and current regulation circuits.
- Automotive Systems: Reliable performance in automotive applications due to its AEC-Q100 qualification and temperature stability.
Q & A
- What is the TL431ILPG used for?
The TL431ILPG is a programmable precision reference voltage regulator used in various applications such as precision switching power supplies, linear regulated power supplies, voltage comparators, and more.
- What is the adjustable output voltage range of the TL431ILPG?
The output voltage of the TL431ILPG can be adjusted from 2.5V to 36V using two external resistors.
- What is the dynamic output impedance of the TL431ILPG?
The dynamic output impedance is typically 0.22 Ω, ensuring minimal resistance at the output.
- What is the operating temperature range of the TL431ILPG?
The TL431ILPG operates efficiently within a temperature range of -40°C to +125°C.
- Is the TL431ILPG suitable for automotive applications?
Yes, the TL431ILPG is AEC-Q100 qualified, making it reliable and durable for use in automotive systems.
- What is the typical voltage reference tolerance of the TL431ILPG?
The voltage reference tolerance is typically ±0.4% at 25°C.
- Can the TL431ILPG be used as a negative voltage reference?
Yes, the TL431ILPG can operate as both a positive and negative voltage reference.
- What is the sink current capability of the TL431ILPG?
The sink current capability ranges from 1.0 mA to 100 mA.
- Is the TL431ILPG RoHS compliant?
Yes, the TL431ILPG is Pb-free, halogen-free/BFR-free, and RoHS compliant.
- What are some common applications of the TL431ILPG?
Common applications include precision switching power supplies, linear regulated power supplies, voltage comparators, power supply monitors, and constant current sources.
