Overview
The TL431IPG, produced by onsemi, is a programmable precision reference voltage regulator. It is a three-terminal adjustable shunt regulator that operates as a low temperature coefficient Zener diode, whose output voltage can be programmed using two external resistors. This device is widely used in various applications requiring stable and adjustable reference voltages.
The TL431IPG is part of the TL431 series, which includes several variants such as the TL431A and TL431B, each with slightly different specifications and temperature ranges. It is known for its high precision, low output impedance, and wide operating current range, making it an excellent replacement for traditional Zener diodes in many circuits.
Key Specifications
| Characteristic | Symbol | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Cathode to Anode Voltage | VKA | V | - | - | 37 |
| Cathode Current Range, Continuous | IK | mA | -100 | - | 150 |
| Reference Input Current Range, Continuous | Iref | mA | -0.05 | - | 10 |
| Operating Junction Temperature | TJ | °C | - | - | 150 |
| Operating Ambient Temperature Range | TA | °C | -40 | - | 85 |
| Reference Input Voltage | Vref | V | 2.44 | 2.495 | 2.55 |
| Dynamic Impedance | ZKA | Ω | 0.22 | - | 0.5 |
Key Features
- Programmable output voltage from Vref to 36 V using two external resistors
- Low dynamic output impedance of 0.22 Ω typical
- Sink current capability of 1.0 mA to 100 mA
- Reference voltage tolerance: ±0.4% (B grade), ±1% (A grade), ±2% (Standard grade)
- Low output noise voltage
- Temperature compensated for operation over full rated operating temperature range
- Pb-free, halogen-free/BFR-free, and RoHS compliant
Applications
- Switch mode power supplies
- Isolated power supply circuits
- Voltage comparators
- Current regulation circuits
- Rack server power, industrial AC/DC, AC inverter & VF drives, servo drive control modules, and notebook PC power adapter designs
- Digital voltmeters and op-amp circuitry
Q & A
- What is the TL431IPG?
The TL431IPG is a programmable precision reference voltage regulator produced by onsemi.
- How is the output voltage of the TL431IPG programmed?
The output voltage can be programmed using two external resistors connected to the reference pin.
- What is the operating current range of the TL431IPG?
The TL431IPG operates with a sink current capability of 1.0 mA to 100 mA.
- What is the typical dynamic impedance of the TL431IPG?
The typical dynamic impedance is 0.22 Ω.
- What are the common applications of the TL431IPG?
Common applications include switch mode power supplies, isolated power supply circuits, voltage comparators, and current regulation circuits.
- What is the operating ambient temperature range of the TL431IPG?
The operating ambient temperature range is from -40°C to 85°C.
- Is the TL431IPG RoHS compliant?
Yes, the TL431IPG is Pb-free, halogen-free/BFR-free, and RoHS compliant.
- What is the reference input voltage of the TL431IPG?
The reference input voltage is typically 2.495 V.
- Can the TL431IPG be used as a positive or negative voltage reference?
Yes, the TL431IPG can be used as either a positive or negative voltage reference.
- What is the maximum cathode to anode voltage for the TL431IPG?
The maximum cathode to anode voltage is 37 V.
