Overview
The TL431IDG4 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 and versatility. The TL431IDG4 is particularly suited for applications requiring a stable reference voltage over a wide temperature range.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Reference Voltage Tolerance at 25°C | % | 0.5 (B grade), 1 (A grade), 2 (Standard grade) | ||
| Adjustable Output Voltage | V | Vref (approx. 2.5 V) | 36 | |
| Operating Temperature Range | °C | -40 | 125 | |
| Typical Temperature Drift | mV | 6 (C temp), 14 (I temp, Q temp) | ||
| Output Impedance | Ω | 0.2 | ||
| Sink-Current Capability | mA | 1 | 100 | |
| Cathode to Anode Voltage | V | 37 | ||
| Operating Junction Temperature | °C | 150 |
Key Features
- Adjustable output voltage from Vref (approximately 2.5 V) to 36 V using two external resistors.
- Operation from -40°C to 125°C, ensuring stability over a wide temperature range.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability ranging from 1 mA to 100 mA.
- Low temperature drift, with values of 6 mV for C temperature grade and 14 mV for I and Q temperature grades.
- Available in various grades with initial tolerances of 0.5%, 1%, and 2% at 25°C for B, A, and standard grades, respectively.
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.
- Onboard regulation and adjustable power supplies.
- Switching power supplies.
Q & A
- What is the TL431IDG4?
The TL431IDG4 is a precision programmable reference voltage regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431IDG4?
The output voltage can be adjusted from Vref (approximately 2.5 V) to 36 V using two external resistors.
- What is the operating temperature range of the TL431IDG4?
The device operates from -40°C to 125°C.
- What are the typical temperature drift values for the TL431IDG4?
The typical temperature drift values are 6 mV for C temperature grade and 14 mV for I and Q temperature grades.
- What is the output impedance of the TL431IDG4?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431IDG4?
The sink-current capability ranges from 1 mA to 100 mA.
- In what types of applications is the TL431IDG4 commonly used?
It is commonly used in rack server power supplies, industrial AC/DC power supplies, AC inverters, VF drives, servo drive control modules, and notebook PC power adapter designs.
- What are the different grades of the TL431 series and their respective tolerances?
The TL431 series is available in B, A, and standard grades with initial tolerances of 0.5%, 1%, and 2% at 25°C, respectively.
- What is the maximum cathode to anode voltage for the TL431IDG4?
The maximum cathode to anode voltage is 37 V.
- What is the maximum operating junction temperature for the TL431IDG4?
The maximum operating junction temperature is 150°C.
