S-1313B20-M5T1U3

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S-1313B20-M5T1U3 Application Field and Working Principle

The S-1313B20-M5T1U3 are three-terminal, adjustable linear voltage regulators. They are intended as fixed voltage regulators in a wide range of applications. The adjustment terminal can be used to set the regulator’s output voltage to any value between 1.2V and 20V, depending on the value of an external resistor divider. Load regulation is better than 0.1%. The output voltage is maintained constant over a wide range of operating conditions.

The S-1313B20-M5T1U3 is available in fixed output voltage options of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V and 12V, as well as adjustable versions of 1.2V to 20V. The S-1313B20-M5T1U3 also features short-circuit protection, temperature protection, over-voltage protection, and current-limiting protection.

Applications

The main applications of the S-1313B20-M5T1U3 are it function as a general purpose voltage regulator for portable electronics. It is suitable for use in applications such as medical equipment, LED lighting, various home appliances, automotive electronics and power management systems. It is also used in clocks and timers, relay control, temperature control, computer peripherals and other low voltage applications.

Working Principle

The S-1313B20-M5T1U3 is a three-terminal linear voltage regulator, which means its input voltage (Vin) is regulated using an internal feedback voltage (Vref) and a reference voltage (Vref). The reference voltage is used to compare the output voltage (Vout) to the feedback voltage, thus controlling the output voltage. To set the output voltage, an external resistor divider is used to adjust the reference voltage which then controls the output voltage. The resistor divider is connected to the adjustment terminal (ADJ).

When the Vin voltage is greater than the Vout voltage, the internal comparator compares the Vout voltage to the Vref voltage. If the Vout voltage is higher than the Vref voltage, the comparator output will switch to its corresponding low logic level, which activates an internal switch. The switch will then turn on an internal current source, allowing current to flow from the input voltage to the output voltage. This current will flow through the external resistor divider, thus adjusting the reference voltage. The reference voltage is adjusted until the output voltage is equal to the reference voltage and the comparator output will then switch to its corresponding high logic level, thus turning off the internal switch. This cycle is repeated when the input voltage changes, thus maintaining the output voltage.

The S-1313B20-M5T1U3 also features other voltage regulation protections such as overvoltage protection, current-limiting protection, temperature protection, and short-circuit protection. These features make the SEIR S-1313B20-M5T1U3 an ideal choice for applications requiring reliable, adjustable and precise voltage regulation.

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