S-1312B18-M5T1U3

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The S-1312B18-M5T1U3 is a low dropout linear voltage regulator. It is within the family of PMIC - Voltage Regulators - Linear, and its main purpose is for use in power management applications. It is a 3 terminal device that offers a logic-controlled, programmable and adjustable output voltage with excellent line and load regulation.

The S-1312B18-M5T1U3 provides a 4.0V to 18V adjustable voltage output, and is capable of supplying a 1A continuous output current with the maximum dropout voltage of 0.2V at full load. It is suitable for use in board level power applications, and provides power supply and overload protection features.

The S-1312B18-M5T1U3 has two programmable output voltage ranges, which can be set at “Normal” or “High” through the corresponding pins on the device. In high range, output voltage can be programmable from 4.6V to 18V and in normal range, output voltage can be programmable from 4.0V to 13.5V. It is provided with an On/Off switch and an EN input for enabled/disabled states.

The S-1312B18-M5T1U3 features low noise, high ripple rejection, fast transient response and a wide range of operating temperature, typically from -40°C to +125°C. The device can be used in mobile phone, PDA, laptop and other power management applications, thus effectively reducing the workload of the LDO regulating during a low power load process.

The working principle of the S-1312B18-M5T1U3 is simple. Its primary task is to provide an adequate amount of voltage for the load by using an internal reference source that is typically 0.8V, and then adjusting the output voltage by adjusting the control loop. This control loop works through an error amplifier and an external resistor divider. The error amplifier works by comparing the reference voltage with the output voltage. When the reference voltage is higher than the output voltage, the error amplifier sends an output to the base of the pass transistor, which increases the voltage output.

When the reference voltage is lower than the output voltage, the error amplifier sends an output to the base of the pass transistor, which decreases the voltage output. The external resistor divider is used to adjust the output voltage range. This is the basic working principle of the S-1312B18-M5T1U3.

In conclusion, the S-1312B18-M5T1U3 is a low dropout linear voltage regulator, belonging to the family of PMIC - Voltage Regulators - Linear. It is capable of providing a programmable and adjustable output voltage, with excellent line and load regulation, and it is ideal for use in high power applications. It also has a wide operating temperature range, making it suitable for different environmental conditions. The S-1312B18-M5T1U3\'s working principle is straightforward, and it effectively reduces the workload of the LDO during a low power load process.

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