S-1112B34MC-L6TTFU

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Linear voltage regulators are widely used in various industrial, consumer and automotive applications for power management and stepping power down from a higher voltage to a lower voltage. The S-1112B34MC-L6TTFU is a low-input voltage linear regulator among the offerings from ROHM, and is ideal for microcontroller systems requiring a low-input voltage of 2.7V-5.5V in order to realize additional battery life. It offers high-speed transient response, low output noise and low quiescent current. This article will discuss the application field and working principle of the S-1112B34MC-L6TTFU.

Application fields of the S-1112B34MC-L6TTFU

The S-1112B34MC-L6TTFU is very useful in a wide range of applications. Due to its extremely low quiescent current, it is suitable for portable battery-powered equipment like PDAs and smart phones. It is also suited for battery management systems found in electric vehicles. With its very high transient response, it is suitable for applications that require supplies with very fast response time to high-current pulses, like digital cameras and other devices that draw heavy transient currents. Finally, the S-1112B34MC-L6TTFU is great for digital audio equipment, as its low output noise prevents buzzing and humming in audio signals.

Working principle of the S-1112B34MC-L6TTFU

The S-1112B34MC-L6TTFU uses a voltage reference to create a constant output voltage, independent of input voltage or load current. The device includes an error amplifier, an output pass element, a reference voltage source and control circuitry connected as a closed-loop system. In operation, the output pass transistor is switched on and off by the control circuitry, thereby controlling the voltage at the output. The voltage across the load is monitored and compared with the reference voltage. If the load voltage is lower than the reference voltage, the output pass transistor is switched on, and the load voltage rises. If the load voltage is higher than the reference voltage, the output transistor is switched off, and the load voltage drops back down. In this manner, the S-1112B34MC-L6TTFU is able to regulate the output voltage at a constant voltage level regardless of input voltage or load current.

The S-1112B34MC-L6TTFU also offers a low-dropout mode, which is activated if the output set voltage is close to that of the input voltage. This mode draws less current than normal operation in order to further reduce power dissipation.

Conclusion

The S-1112B34MC-L6TTFU is a low-input voltage linear regulator designed for use in microcontroller systems, battery management systems, and other applications requiring a low-input voltage, high-speed transient response, low output noise, and low quiescent current. Its form factor and functionality make it ideal for a wide range of applications, from portable battery-powered equipment to digital audio and video equipment. By using a voltage reference, error amplifier, and pass element, the S-1112B34MC-L6TTFU is able to regulate the output voltage at a constant level despite any changes in input voltage or load current. Its low-dropout mode also helps to keep power dissipation to a minimum.

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