Overview
The TL431AIPKG3 is a precision programmable reference voltage regulator produced by Texas Instruments. It is part of the TL431 series, which includes three-terminal adjustable shunt regulators known for their thermal stability across various temperature ranges. These devices are designed to offer adjustable output voltages and are widely used in applications requiring precise voltage referencing.
The TL431AIPKG3 operates from -40°C to 125°C, making it suitable for automotive, commercial, and military environments. It features a sharp turn-on characteristic, low output noise, and a typical output impedance of 0.2 Ω, making it an excellent replacement for Zener diodes in many applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage Tolerance at 25°C | - | - | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) | % |
| Adjustable Output Voltage | Vref (approx. 2.5V) | - | 36V | V |
| Operating Temperature Range | -40°C | - | 125°C | °C |
| Typical Temperature Drift | - | 6 mV (C Temp), 14 mV (I Temp, Q Temp) | - | mV |
| Output Impedance | 0.2 | - | 0.5 | Ω |
| Sink-Current Capability | 1 mA | - | 100 mA | mA |
| Minimum Cathode Current for Regulation | 0.4 | - | 0.6 | mA |
| Off-State Cathode Current | 0.1 | - | 0.5 | µA |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade)
- Adjustable output voltage: Vref (approximately 2.5V) to 36V
- Operation from -40°C to 125°C
- Typical temperature drift: 6 mV (C Temp), 14 mV (I Temp, Q Temp)
- Low output noise and 0.2 Ω typical output impedance
- Sink-current capability: 1 mA to 100 mA
- Active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes
Applications
- Rack server power supplies
- Industrial AC/DC power supplies
- AC inverter and VF drives
- Servo drive control modules
- Notebook PC power adapter designs
- On-board regulation and adjustable power supplies
- Switching power supplies
Q & A
- What is the TL431AIPKG3?
The TL431AIPKG3 is a precision programmable reference voltage regulator produced by Texas Instruments.
- What are the temperature ranges for the TL431AIPKG3?
The device operates from -40°C to 125°C.
- What is the adjustable output voltage range of the TL431AIPKG3?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V.
- What are the reference voltage tolerances for the TL431AIPKG3?
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 TL431AIPKG3?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431AIPKG3?
The sink-current capability ranges from 1 mA to 100 mA.
- What are some common applications of the TL431AIPKG3?
Common applications include rack server power supplies, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
- Can the TL431AIPKG3 replace Zener diodes in some applications?
Yes, the TL431AIPKG3 can replace Zener diodes due to its sharp turn-on characteristic and low output noise.
- What are the different packages available for the TL431AIPKG3?
The TL431AIPKG3 is available in various packages including SOT-23-3, SOT-23-5, SOIC, PDIP, and SOP.
- What is the minimum cathode current required for regulation?
The minimum cathode current for regulation is between 0.4 mA and 0.6 mA.
- What is the off-state cathode current of the TL431AIPKG3?
The off-state cathode current is between 0.1 µA and 0.5 µA.
