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S-13R1G32-I4T1U3 application field and working principle

Introduction

PMIC (Power Management Integrated Circuit) is a microchip that ensures that power is efficiently supplied to all components in a system, such as a SoC (System on Chip). The utility of voltage regulation in PMICs is to provide a safe and reliable power supply.This article focuses on S-13R1G32-I4T1U3, an integrated linear voltage regulator, to discuss its application fields and working principles.

PMIC - Voltage Regulators - Linear

Application Fields

S-13R1G32-I4T1U3 is suitable for applications with a wide range of operating voltages, from 1.2V to 3.6V, and deliver currents of up to 20mA. Its low-dropout (LDO) regulator circuit ensures that output voltage remains stable even when there is small difference between the input and output voltages.S-13R1G32-I4T1U3 is specially designed for battery-powered, portable electronic systems equipped with high voltage integrated circuits, such as battery management systems.

Working Principle

In an integrated linear voltage regulator, the output voltage is a fixed, predetermined value that is less than the input voltage. It uses an operational amplifier (op-amp) as the regulating element, which is responsible for maintaining the output voltage at a fixed level.The schematic diagram of a linear voltage regulator circuit is shown below. The input voltage is applied to the “Vi” end of the regulator, while the output voltage is taken from the “Vo” terminal. The op-amp is connected in a negative feedback configuration and serves to compare the output voltage with a reference voltage. Internally, the op-amp amplifies to a certain with the voltage difference between the output voltage and the reference voltage. The amplified signal is then buffered by an external NPN transistor, which is connected in series with the regulator. Together, these components form the linear voltage regulator. When the voltage difference between the output and reference exceeds the predetermined level, the op-amp signals the PNP transistor to adjust the current through the series combination of the two transistors. This process provides for a controlled, constant output voltage even when the input voltage changes.

Conclusion

The S-13R1G32-I4T1U3 is an integrated linear voltage regulator suitable for a wide range of operating voltages and current levels. It works by maintaining a predetermined difference between the input and output voltage by using a negative feedback configuration of an op-amp and an NPN/PNP transistor pair. This makes S-13R1G32-I4T1U3 ideal for battery-powered, portable electronic systems with high voltage integrated circuits.

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