S-1121B29MC-N2OTFG

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The S-1121B29MC-N2OTFG is a two-phase, pulse-width modulation (PWM)-controlled, fixed output voltage linear regulator. The voltage regulator features ultra-low dropout voltage and low power dissipation and also has low noise and high efficiency, suitable for various applications such as point of load (POL) regulators, power over Ethernet (PoE) switches, industrial control systems, motor drives and more.

The output voltage is adjustable from 3.4V to 30V, with a maximum output current of 17A. In order to provide maximum efficiency and stability, the voltage regulator can automatically switch operating modes depending on the load current. At a light load current, the PWM mode is enabled to ensure high efficiency, while at heavier load currents the PWM mode is disabled and the linear mode is enabled to keep the output voltage stable. The S-1121B29MC-N2OTFG also features adjustable soft-start, over current protection (OCP) and over temperature protection (OTP).

The S-1121B29MC-N2OTFG also offers low voltage system reset logic, enabling the system to remain in a save low-power state, which helps reduce system power consumption and extends the battery life.

S-1121B29MC-N2OTFG can be widely applied in the following fields:

• Cell Phones: The S-1121B29MC-N2OTFG can be used in cell phones as a low-dropout (LDO) regulator to power components such as the audio amplifiers,as well as to provide a stable supply voltage for the CPU, memory and other components.
• Networking and Communication Equipment: The S-1121B29MC-N2OTFG can be used to power PoE switches, routers, and other networking and communication equipment, as its low dropout voltage and high efficiency help to reduce the power consumption and extend the equipment’s battery life.
• Industrial Controls and Automation: The S-1121B29MC-N2OTFG can also be used in industrial controls and automation systems, as its wide input voltage range and adjustable output voltage make it suitable for a variety of industrial applications.
• Battery-Powered Devices: The S-1121B29MC-N2OTFG can also be used for powering battery-powered devices such as LED light systems, portable medical devices and consumer electronics. Its low power consumption and low dropout voltage makes it an ideal choice.

In terms of working principle, the S-1121B29MC-N2OTFG uses pulse-width modulation (PWM) control to regulate its output voltage. In PWM mode, the regulator will compare the output voltage to a reference voltage, and then it will use a switch circuit to switch on/off the voltage regulator. The duty cycle of the PWM signal will be adjusted to control the output voltage. When the load decreases, the duty cycle increases, and conversely when the load increases, the duty cycle decreases.

In the linear mode, the S-1121B29MC-N2OTFG will compare the output voltage to a reference voltage and adjust the current supply to make the output voltage constant. The current supply is changed through an internal transistor, which lowers the output voltage when the load current decreases, and vice versa.

Overall, the S-1121B29MC-N2OTFG is an ideal solution for power supplies or linear regulators due to its wide input voltage range and adjustable output voltage, along with its low power dissipation, low noise, and high efficiency. It can be used in a wide variety of applications, ranging from cell phones, PoE switches, industrial control systems, battery-powered devices and more.

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