SMBG4738AE3/TR13

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Diodes have become a critical component in electronic circuits due to their ability to direct current in one direction and provide conduction to only one direction. Examples range from the simplest rectifier diode to more complex high-speed switching diodes. Zener diodes are used as voltage references by using a larger voltage drop than a standard diode and their potential for higher than normal reverse voltage in the opposite direction. Single Zener diodes are suited for regulating voltages and SMBG4738AE3/TR13 is an example of such.

SMBG4738AE3/TR13 is a single Zener diode in a standard SOD-323 package. Its main function is to generate a regulated output voltage that is held constant irrespective of changes to the input current and voltage levels. The diode has good stability and a tight voltage tolerance of ±2%. Its maximum power dissipation is 350 mW when mounted on a standard FR-4 board or 200 mW when mounted on a ceramic board. Furthermore, it has a low leakage current, high switching speed and fast recovery time.

The working principle of the SMBG4738AE3/TR13 is that of a diode. It operates in the forward bias direction, where the diode conduction occurs when the applied voltage is greater than the diode’s forward voltage drop of 0.7 V. However, when operating in the reverse direction, the Zener property takes over, wherein an applied reverse voltage higher than the Zener breakdown voltage will activate the Zener action and create a low voltage drop that prevents further rise in current. This is what provides the precise voltage regulation for which it is designed.

SMBG4738AE3/TR13 is used frequently in voltage regulator circuits with a DC load, such as USB power and audio amplifier applications, as well as automotive and aerospace applications. This is because these applications often require precise voltage regulation and a low power dissipation. SMBG4738AE3/TR13 is also commonly used in circuits where precise voltage regulation and a tight voltage tolerance is essential such as LED drivers and power supplies.

Overall, SMBG4738AE3/TR13 is a voltage-regulated, single Zener diode that offers precise voltage regulation and low power dissipation when incorporated into electronic circuits. Its ability to provide a precise and constant output voltage makes this a popular choice when building circuits that require precise voltage control. It is typically used in applications where precise voltage regulation and a tight voltage tolerance are necessary such as USB power, audio amplifiers, automotive, and aerospace circuits.

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