Part Number: TLVH431BIDBZR

Manufacturer: Texas Instruments

Description: Voltage References Lo-Vtg Adj Precision Shunt Regulator

Shipped from: Shenzhen/HK Warehouse

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The Shunt voltage reference from Texas Instruments, model number TLVH431BIDBZR, is offered in a package with the designation SOT-23-3 SMD (SMT). It is intended to reach a precision voltage reference of 1.24V while maintaining an accuracy of 0.5%. Over the expanded temperature range of -40 degrees Celsius to 85 degrees Celsius, excellent performance is held at the required output current of 70 milliamperes (mA) (TA). These devices run at a 1.24 volts lower (compared to the widely used TL431 and TL1431 shunt regulator references) than the TL431 and TL1431 references.

The TLVH431BIDBZR device is appropriate for usage as voltage references in isolated feedback circuits for switching mode power supply ranging from 3 V to 3.3 V when coupled with an optocoupler and put to use. The normal output impedance of this device is 0.25 ohms. Because of its active output circuitry’s highly sharp turn-on characteristic, the TLVH431BIDBZR device is an adequate low-voltage Zener diode replacement for various applications, including onboard regulation and adjustable power supply.

TLVH431BIDBZR Features

  • It can operate at low voltages, as low as 1.24 V.
  • Reference voltage tolerances for B, A, and standard grades at 25°C are 1%, 0.5%, and 1.5%, respectively.
  • The output voltage is variable, VO = VREF to 18 V.
  • One of its features is a wide operating cathode current range of 100 A to 70 mA.
  • It has a typical output impedance of 0.25.

TLVH431BIDBZR Applications

  • The adjustable voltage reference for data Converters
  • Secondary side regulation in flyback SMPSs
  • Zener replacement with low leakage current
  • Voltage monitoring for power rails
  • Comparator with integrated reference

Frequently Asked Questions

What Is A Linear Regulator?

A linear regulator is a voltage regulator used in electronics to keep the voltage constant.  As a result of the regulator’s variable resistance in reaction to variations in the input voltage and the load, a constant voltage is finally maintained. The resistance of the regulating circuit is adjusted continuously so that a voltage divider network can keep the output voltage stable.

At the same time, the waste heat generated by the difference in voltage between the unregulated and regulated levels is continuously dissipated. In contrast, a switching regulator uses an active component that oscillates (switches on and off) to maintain a steady average value for the output. The efficiency of a linear regulator is constrained since its output voltage must always be less than its input voltage. The input voltage must also be high enough to stop the active device from losing some voltage.

Shunt regulators and series regulators are both types of linear regulators. Series regulators situate the regulating device between the source and the controlled load, as opposed to series regulators, which align the regulating device with the load (series regulator). A Zener diode and a series resistor may be needed for a simple linear regulator; more complex regulators might contain separate stages for a voltage reference, error amplifier, and power pass element. Simple linear regulators may also only have these two components. Because linear voltage regulators are found in many devices, single-chip regulator integrated circuits (ICs) are widespread. Linear regulators can also be assembled from discrete components of solid-state or vacuum tubes. This is another construction option.

Linear regulators are not linear circuits, despite their names. This is because they contain non-linear components, and the output voltage is ideally constant. A non-linear circuit has a continuous output that does not depend on its input.

What is a Voltage Regulator?

Voltage levels can be regulated with the use of a voltage regulator. The voltage regulator is the device of choice if it is necessary to maintain a consistent and dependable voltage. It produces a fixed output voltage that does not change despite any changes in the load circumstances or the voltage that is being input. It serves as a buffer, protecting the components from any damage. A voltage regulator is a piece of equipment with a straightforward feed-forward architecture and uses control loops based on negative feedback.

Linear and switching voltage regulators are the two primary varieties of voltage regulators. Both of these types are utilized in a variety of contexts and applications. The linear voltage regulator is the most straightforward variety of voltage regulators. It comes in two small varieties, suitable for use in low-power and low-voltage systems.

What is a Linear Voltage Regulator?

The linear regulator also functions as a voltage divider in this configuration. It employs FET technology in the ohmic region. The load imposes a dynamic change on the voltage regulator’s resistance, resulting in a stable output voltage.

Linear voltage regulators were the first type used to regulate power supply. Linear regulators are used to controlling the voltage across a linear circuit. The variable conductivity of the active pass element in this regulator, such as a MOSFET or a BJT, is responsible for changing the output voltage in this regulator.

Variations in any input or load other than the load affect the transistor’s current flow. This helps to ensure that the output remains unchanged. It is necessary to work on the transistor while it is active; otherwise, the Ohmic zone will be altered if the current is altered.

During this process, the net voltage is dropped within the transistor, which causes the energy to dissipate as heat, causing this type of regulator to waste a significant amount of power.

What is a shunt regulator?

A shunt voltage regulator can perform its function because it creates a connection between the source voltage and ground via a changeable resistance. Since the shunt regulator redirects current away from the load and to the ground, it is not as efficient as a series regulator. It is, however, simpler and may occasionally consist of nothing more than a voltage-reference diode. It is employed in highly low-powered circuits when the wasted current is so insignificant that it is not a cause for worry. Voltage reference circuits typically take this shape the vast majority of the time. In most cases, a shunt regulator can only “sink” or “absorb” current.


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