Overview
The TL431CPSRG4, produced by Texas Instruments, is a precision programmable reference voltage regulator. 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 versatile and can be used in a wide range of applications, including on-board regulation, adjustable power supplies, and switching power supplies. The TL431CPSRG4 offers adjustable output voltage, low output noise, and a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many circuits.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Adjustable Output Voltage | Vref to 36 V | V |
| Operating Temperature Range | −40°C to 125°C | °C |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Types | SOT-23-3, SOT-23-5, SOIC, PDIP, SOP |
Key Features
- Adjustable output voltage between Vref (approximately 2.5 V) and 36 V using two external resistors.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability ranging from 1 mA to 100 mA.
- Sharp turn-on characteristic, making it suitable for replacing Zener diodes.
- Thermal stability over automotive, commercial, and military temperature ranges.
- Available in different grades with varying initial tolerances (B, A, and Standard grade).
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.
- On-board regulation and adjustable power supplies.
- Switching power supplies.
Q & A
- What is the TL431CPSRG4 used for? The TL431CPSRG4 is used as a precision programmable reference voltage regulator in various applications, including on-board regulation, adjustable power supplies, and switching power supplies.
- What is the adjustable output voltage range of the TL431CPSRG4? The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V using two external resistors.
- What are the operating temperature ranges for the TL431CPSRG4? The device operates from −40°C to 125°C, depending on the specific grade (C, I, Q).
- What is the typical output impedance of the TL431CPSRG4? The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431CPSRG4? The sink-current capability ranges from 1 mA to 100 mA.
- Can the TL431CPSRG4 replace Zener diodes? Yes, the TL431CPSRG4 can replace Zener diodes due to its sharp turn-on characteristic and low output noise.
- What are the different grades of the TL431CPSRG4? The TL431CPSRG4 is available in B, A, and Standard grades, each with different initial tolerances (0.5%, 1%, and 2%, respectively).
- What are some common applications of the TL431CPSRG4? 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.
- How does the TL431CPSRG4 ensure thermal stability? The TL431CPSRG4 ensures thermal stability through its specified thermal stability over applicable automotive, commercial, and military temperature ranges.
- What package types are available for the TL431CPSRG4? The TL431CPSRG4 is available in SOT-23-3, SOT-23-5, SOIC, PDIP, and SOP package types.
