Overview
The TL431CPSR from Texas Instruments is a precision adjustable shunt regulator, part of the TL431 series. This device is designed to provide a stable voltage reference with adjustable output voltage ranging from 2.495V to 36V. It is a three-terminal regulator, offering high thermal stability and low output noise, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 2% (Standard grade) | - |
| Adjustable Output Voltage | 2.495V to 36V | V |
| Operating Temperature Range | -40°C to 125°C (TL431Q) | °C |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Output Impedance | 0.2 Ω (Typical) | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Types | SOT-23-3, SOT-23-5, SOIC, PDIP, SOP, TSSOP | - |
| Cathode Voltage | 37 V (Max) | V |
| Continuous Cathode Current Range | -100 mA to 150 mA | mA |
Key Features
- Adjustable output voltage from 2.495V to 36V
- High thermal stability over a wide temperature range (-40°C to 125°C)
- Low output noise
- Typical output impedance of 0.2 Ω
- Sink-current capability from 1 mA to 100 mA
- Available in various package types including SOT-23, SOIC, PDIP, SOP, and TSSOP
Applications
- Rack server power supplies
- Industrial AC/DC power supplies
- AC inverter and variable frequency (VF) drives
- Servo drive control modules
- Notebook PC power adapter designs
Q & A
- What is the adjustable output voltage range of the TL431CPSR?
The TL431CPSR has an adjustable output voltage range from 2.495V to 36V.
- What are the operating temperature ranges for the TL431CPSR?
The device operates from -40°C to 125°C for the Q-grade models.
- What is the typical temperature drift for the TL431CPSR?
The typical temperature drift is 6 mV for C temp and 14 mV for I and Q temps.
- What is the output impedance of the TL431CPSR?
The typical output impedance is 0.2 Ω.
- What are the package options available for the TL431CPSR?
The device is available in SOT-23-3, SOT-23-5, SOIC, PDIP, SOP, and TSSOP packages.
- What is the maximum cathode voltage for the TL431CPSR?
The maximum cathode voltage is 37 V.
- What is the sink-current capability of the TL431CPSR?
The sink-current capability ranges from 1 mA to 100 mA.
- What are some common applications for the TL431CPSR?
Common applications include rack server power supplies, industrial AC/DC power supplies, AC inverters, VF drives, servo drive control modules, and notebook PC power adapter designs.
- How does the TL431CPSR ensure thermal stability?
The device ensures thermal stability through its design, which maintains good stability over the entire temperature range.
- What is the reference voltage tolerance at 25°C for the TL431CPSR?
The reference voltage tolerance at 25°C is 2% for the Standard grade.
