S-1313D32-N4T1U3

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S-1313D32-N4T1U3 Application Field and Working Principle

The S-1313D32-N4T1U3 is a low-noise, low-power linear voltage regulator designed to provide excellent output accuracy and stability over a wide range of input voltage levels and temperatures. It can be used as a standalone regulator or as part of an integrated power supply system. This application note describes the working principle of S-1313D32-N4T1U3, its application field and typical application circuitry.

S-1313D32-N4T1U3 Application Field

The S-1313D32- N4T1U3 is designed to provide good system stability and high accuracy in different applications requiring regulated power supply. It is particularly suitable for low-power and portable applications. The device can be used in applications such as LCD display, PDA battery management and automotive. The S-1313D32-N4T1U3 is well-suited for applications with a wide range of input voltages, due to its wide input range. Additionally, the device offers very low output noise, excellent line and load regulation and fast transient response.

S-1313D32-N4T1U3Working Principle

The S-1313D32-N4T1U3 is a linear voltage regulator with a built-in error amplifier. It provides a regulated output voltage with a low-noise, low-power supply. The device operates in two modes: normal mode and PFM mode. In normal mode, the device monitors the output voltage, and if it drops below the threshold value, the device turns on the pass element, which connects the input voltage source to the output. The pass element remains turned on until the output voltage reaches the threshold value. In PFM mode, the device switches off the pass element at a preset frequency, ensuring low power consumption and low noise outputs. The S-1313D32-N4T1U3 also features built-in thermal protection and over-voltage and over-current protection.

S-1313D32-N4T1U3 Typical Application Circuitry

The typical circuit of the S-1313D32-N4T1U3 is shown in Figure 1. The circuit includes components such as the input capacitor, output inductor, feedback resistor, sense resistor and the pass element. The input capacitor serves as the energy source for the regulator, it also helps reduce current noise, and the output inductor is used to store energy and provide smooth ripple free outputs. The feedback resistor adjusts the output voltage, providing the desired voltage level. The sense resistor provides current sensing capabilities for over-current protection. The pass element is a P-channel MOSFET which is used to switch the input voltage to the output. The typical application circuit also includes safety components such as reverse-current blocking diode, thermal protection diode and surge suppressor diode.

Figure 1: Typical S-1313D32-N4T1U3 application circuit.

Conclusion

The S-1313D32-N4T1U3 is a low-noise, low-power linear regulator designed to provide excellent output accuracy and stability over a wide range of input voltages and temperatures. It is suitable for various applications, such as LCD displays, PDA battery management and automotive applications. The device operates in two different modes, and its typical application circuit includes input and output capacitors, inductors, resistors, and protection components such as thermistor, surge suppressor and blocking diode. The device also offers excellent load regulation, fast transient response and low output noise.

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