S-1122B35MC-L8UTFU

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PMIC - Voltage Regulators - Linear encompasses a variety of power management integrated circuits (PMICs) such as buck (step-down) regulators, boost (step-up) regulators, and linear (low dropout, or LDO) regulators. The S-1122B35MC-L8UTFU is an exemplary device from this product category, and this document will discuss the application field and working principle of this device.

Application field

The S-1122B35MC-L8UTFU is a high precision linear regulator. This means that it is designed to supply a voltage of approximately a fixed value by gently limiting the current to a predetermined value. This makes it a good choice for powering devices such as microcontrollers and digital logic that require stable voltages and currents over a wide range of temperatures. The device is ideal for applications such as microcontrollers, wireless charging, digital logic, and ultra-low power solutions.

The S-1122B35MC-L8UTFU has a fixed output voltage of 3.3V and can supply up to 1.5A (1.5A continuous, 2.2A peak current). It has extremely low quiescent current of only 4.81uA, a very low dropout voltage of only 0.4V, and a wide input voltage range of 2.3V to 7.5V. The device also features reverse current protection and a thermal shutdown function.

Working principle

To understand how the S-1122B35MC-L8UTFU functions, it is useful to understand the basic principles of a linear regulator. A linear regulator is a type of voltage regulator that maintains a nearly constant output voltage by controlling the current going through it. It works by comparing the output voltage to a reference voltage, typically set by a potentiometer, and then adjusting the current accordingly. It does this by using a negative feedback loop.

The S-1122B35MC-L8UTFU works as a linear regulator by employing a P-channel MOSFET as the regulating element. In an ideal linear regulator, the output voltage would always be exactly equal to the reference voltage. However, this is not possible in practice due to the finite on-resistance of the MOSFET and the voltage drop across its drain-source junction. Additionally, the voltage regulator must also be able to cope with changes in input voltage and varying load conditions. The S-1122B35MC-L8UTFU is designed to compensate for these effects and thus maintain a stable output voltage with a remarkable degree of accuracy.

In summary, the S-1122B35MC-L8UTFU is a high precision linear voltage regulator designed to supply a fixed output voltage of 3.3V over a wide range of input voltages, temperatures, and load conditions. It employs a negative feedback loop and a P-channel MOSFET as the regulating element to maintain a near-constant output voltage. It is suitable for a wide range of applications such as digital logic, microcontrollers, and ultra-low power solutions.

The specific data is subject to PDF, and the above content is for reference