1SMB5956 R5G

The 1SMB5956 R5G is part of the 1SMB59xx series of surface mount stud diodes, which are designed for use in numerous applications and provide a variety of functions. It is categorized as a Zener Diode, a single component designed specifically to regulate voltage in electric circuits. The primary function of this device is to limit the voltage in one direction while allowing electric current to flow in the opposite direction, thus allowing it to control the voltage in the circuit.

The 1SMB5956 R5G has a reverse breakdown voltage of 5 volts while requiring a power (P_d) dissipation of 350 mW. It comes in an industry-standard SMA surface-mounting package, has low leakage current and is rated for temperature up to 125 degrees Celsius. Additionally, it is rated for bidirectional operation and offers the user a variety of reverse breakdown voltages to choose from.

The 1SMB5956 R5G device’s primary application field is on-board voltage step down or voltage regulation. This is due to its ability to precisely regulate the input and output voltages, due to its low threshold voltage and low series and reverse leakage currents. It is particularly beneficial in applications where maximum utilization of the available power supply range is necessity, as it helps to maintain a steady output voltage over a large range of input voltage variations. Additionally, its low temperature rise makes it preferred for use in applications where power dissipation is critical and temperature is a major concern.

Working principle of the 1SMB5956 R5G is based on biasing a Zener diode into reverse breakdown. Its reverse current and voltage is highly determined by its reverse breakdown voltage (V_Z), due to which any sudden changes in this voltage prompt corresponding changes in the reverse current and voltage. This creates an inverse relationship between V_Z and the regulating current (I_Z), which is the basis for its usage in voltage regulation applications.

The operation of this device requires that the current is increased until it reaches a specific value, at which the voltage across its terminals will maintain a constant value determined by the Zener voltage. This causes an abrupt transition between two points known as the knee of the diode’s curve, where the dynamic resistance of the diode drops to zero and I_Z approaches infinite. This process will be maintained as long as the current is maintained above a certain minimum level.

In conclusion, the 1SMB5956 R5G is a single component Zener diode designed to regulate voltage in electric circuits. It offers a reverse breakdown voltage of 5 volts, with a power dissipation of 350 mW and a temperature range of up to 125 degrees Celsius. It finds its primary application in on-board voltage step down and voltage regulation, due to its ability to precisely regulate input and output voltages. Its working principle is based on biasing a Zener diode into reverse breakdown, in order to maintain a constant voltage at a specific current.