PMIC - Voltage Regulators - Linear

The S-1335H14-A4T2U3 is a voltage regulator designed to provide a regulated voltage output while simplifying device design by allowing the user to easily program the output voltage and reduce external circuitry. It has the ability to adjust the output voltage to within a range of 0.850V to 4.500V. The device offers an ultra-low quiescent current of 350uA, low dropout voltage, and temperature-compensated controlled output voltage.

The device is designed to provide the optimal regulated voltage output with very high accuracy and excellent line and load regulation. It is capable of supplying up to 1.5A continuous current and has internal thermal shutdown protection. It also features an active low enable pin that allows the output voltage to be switched off with minimal current draw. The device is available in a Micro SMD package for maximum design flexibility and minimal board space.

Applications

The S-1335H14-A4T2U3 is ideal for low-voltage, high-current applications such as LED lighting, power supplies, battery management systems, automotive, tablet and cell phone chargers, and motor control systems. It can also be used in embedded systems where low output voltage and high accuracy are necessary.

Working Principle

The S-1335H14-A4T2U3 is a linear voltage regulator that employs an adjustable error amplifier and feedback resistor network to achieve a controlled output voltage. The output voltage is determined by the ratio of the two feedback resistors. The feedback resistors are set to a particular value by the user. The output of the error amplifier is then compared to the reference voltage, and the difference voltage is amplified and applied to the gate of a MOSFET pass device. This increases the current through the pass device, which in turn controls the output voltage with minimal output resistance and excellent accuracy.

The voltage regulator also features an enable pin that can be used to turn the device on and off, or to put it into a low-power shutdown mode. When the enable pin is pulled low, the pass device is switched off, effectively reducing the current through the device and thus reducing the power consumption. Additionally, the device features internal thermal protection that limits the temperature of the chip when it is dissipating power.

Conclusion

The S-1335H14-A4T2U3 voltage regulator is an ideal solution for applications that require an accurate and reliable output voltage with minimal external components. It offers a low quiescent current, active low enable pin, and internal thermal protection in a compact package. The device is suitable for a wide range of low-voltage, high-current applications, and its ease of programming makes it an ideal choice for embedded systems.