Overview
The TL431ILPE3 is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its thermal stability over a wide range of temperatures, making it suitable for automotive, commercial, and military applications. The TL431ILPE3 offers adjustable output voltage, low output noise, and a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in various power supply and regulation applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | TO-92 (LP) | - |
| Pins | 3 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | - |
| Adjustable Output Voltage | Vref to 36 V | V |
| Typical Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Cathode to Anode Voltage | 37 V | V |
| Operating Junction Temperature | 150 °C | °C |
| Reference Input Current Range | -0.05 to +10 mA | mA |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), 2% (Standard grade)
- Adjustable output voltage: Vref to 36 V
- Operation from -40°C to 125°C
- Typical temperature drift: 6 mV (C temp), 14 mV (I temp, Q temp)
- Low output noise
- Typical output impedance: 0.2 Ω
- Sink-current capability: 1 mA to 100 mA
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes
Applications
- On-board regulation
- Adjustable power supplies
- Switching power supplies
- Rack server power
- Industrial AC/DC
- AC inverter & VF drives
- Servo drive control module
- Notebook PC power adapter design
Q & A
- What is the TL431ILPE3?
The TL431ILPE3 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What are the operating temperature ranges for the TL431ILPE3?
The device operates from -40°C to 85°C.
- What is the adjustable output voltage range of the TL431ILPE3?
The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V with two external resistors.
- What are the reference voltage tolerances for the TL431ILPE3?
The reference voltage tolerances are 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the typical output impedance of the TL431ILPE3?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431ILPE3?
The sink-current capability ranges from 1 mA to 100 mA.
- What are some common applications of the TL431ILPE3?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, rack server power, industrial AC/DC, AC inverter & VF drives, servo drive control modules, and notebook PC power adapter design.
- What is the maximum cathode to anode voltage for the TL431ILPE3?
The maximum cathode to anode voltage is 37 V.
- What is the operating junction temperature range for the TL431ILPE3?
The operating junction temperature range is up to 150 °C.
- What is the reference input current range for the TL431ILPE3?
The reference input current range is from -0.05 to +10 mA.
