TL431AMSDT
Precision adjustable shunt voltage references for electronic circuits
Manufacturer： ['nexperia', 'nxp']
series introduction
# Introduction to the TL431AMSDT Product Series
## 1. Overview
The TL431AMSDT is a highly versatile and widely used precision adjustable shunt regulator. It belongs to a family of voltage reference devices that offer exceptional performance in a variety of electronic applications. This product series is designed to provide a stable and accurate reference voltage, making it an essential component in power supplies, battery chargers, voltage regulators, and many other circuits where precise voltage control is required.
## 2. Key Features
### 2.1 Precision Voltage Reference
- The TL431AMSDT offers a very precise reference voltage. It can be adjusted over a wide range, typically from 2.5V to 36V. This adjustability allows designers to tailor the reference voltage according to the specific requirements of their circuits.
- It has a low temperature coefficient, which means that the reference voltage remains relatively stable over a wide temperature range. This is crucial in applications where the operating environment may experience significant temperature variations, ensuring consistent performance.
### 2.2 High Output Current Capability
- It can sink a relatively high current, up to 100mA. This makes it suitable for driving loads directly or for use in circuits where a significant amount of current needs to be regulated. The ability to handle high currents also allows for the design of more robust and efficient power management systems.
### 2.3 Low Dynamic Output Impedance
- The device has a low dynamic output impedance, which helps in maintaining a stable output voltage even when there are changes in the load current. This characteristic is important for applications that require a clean and stable power supply, as it reduces voltage fluctuations and improves the overall performance of the circuit.
### 2.4 Wide Operating Voltage Range
- The TL431AMSDT can operate over a wide input voltage range, typically from 2.5V to 36V. This wide range of operation makes it compatible with a variety of power sources, including batteries, DC power supplies, and other voltage sources commonly used in electronic circuits.
### 2.5 Fast Response Time
- It has a fast response time, which enables it to quickly adjust to changes in the input voltage or load conditions. This is particularly important in applications where rapid voltage regulation is required, such as in switching power supplies or in circuits that need to respond to sudden changes in the load.
## 3. Package and Pin Configuration
### 3.1 Package Type
The TL431AMSDT is available in a small surface - mount SOT - 23 package. This package is compact and suitable for use in high - density printed circuit board (PCB) designs, where space is often limited. The small size also helps in reducing the overall footprint of the circuit, making it ideal for portable and miniaturized electronic devices.
### 3.2 Pin Configuration
- **Anode (A)**: The anode pin is connected to the negative terminal of the power supply or the ground in most applications. It serves as the return path for the current flowing through the device.
- **Cathode (K)**: The cathode pin is the output terminal of the device. It is connected to the load or the circuit that requires the regulated voltage. The current flowing through the load is sourced from the cathode.
- **Reference (R)**: The reference pin is used to set the desired reference voltage. By connecting appropriate resistors between the reference pin, the cathode, and the anode, the output voltage can be adjusted according to the application requirements.
## 4. Applications
### 4.1 Power Supplies
- In linear and switching power supplies, the TL431AMSDT is used as a voltage reference to regulate the output voltage. It helps in maintaining a stable output voltage despite variations in the
Images for reference
SOT-23-3
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