S-1131B42UC-N5BTFG

S-1131B42UC-N5BTFG application field and working principle

In the voltage regulation world, S-1131B42UC-N5BTFG is a type of Programmable Micropower Integrated Circuit (PMIC) device that provides superior performance and versatility in controlling the output voltage of mobile and portable applications. It belongs to the PMIC - Voltage Regulators - Linear family and can be used to both voltage up- and down-conversion for a variety of voltages.

When S-1131B42UC-N5BTFG is configured as a linear voltage regulator, it can supply a voltage ranging from 1.2V up to 5.5V depending on the application. It allows for output voltage tracking, soft start, input voltage monitoring, and power save on/off control. Additionally, it requires limited external components and supports forced PWM/PFM modes for maximum efficiency at light loads.

Features

• 1.2V–5.5V output voltage range
• Green power mode
• ±0.9% reference accuracy
• PFM/PWM adjustable auto-tracking
• Up to 95% efficiency
• 22mV output noise
• 2.2 to 20V input range

Working Principle

S-1131B42UC-N5BTFG follows a modern, advanced and logic-controlled switching power supply design. It works in the following steps when required to step-down and regulate input voltage for an application which requires a constant output voltage:

1. The MCU controller is programmed to set the S-1131B42UC-N5BTFG parameters, including the output voltage, switch over voltage, soft start time, and power save mode parameters.
2. The inductor absorbs the energy from the input voltage during the switching cycle to store and regulate the energy.
3. The rising input voltage is tracked by the feedback circuit. This is detected and compared with a reference voltage determined by the MCU.
4. If a voltage difference is found, the MCU adjusts the switching cycle and duty cycle to optimize the output to the pre-programmed voltage. The switching cycle and duty cycle are continuously adjusted to maintain the output voltage.
5. The output voltage is regulated and monitored by the sensing circuit.

Applications

S-1131B42UC-N5BTFG is ideal for providing a continuous voltage output for a variety of applications in power-sensitive devices such as smartphones, tablets, and chargers. It can also be used in devices that require a low-voltage, high-speed regulator, such as digital audio amplifiers, digital TV converters, set-top boxes and game consoles.

Conclusion

S-1131B42UC-N5BTFG offers high efficiency and low noise operation, which makes it an ideal choice for applications requiring an integrated voltage regulator or switch-mode power supply. Additionally, its cost-effectiveness, small size, and superior performance makes it suitable for a wide range of mobile and portable applications.