S-1711A2J18-I6T1U

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The S-1711A2J18-I6T1U is a linear voltage regulator of PMIC (Power Management Integrated Circuit) family. It is specifically designed for very cost sensitive applications that require high efficiency and low footprint. This voltage regulator can provide up to five regulated outputs from a single regulator, emphasizing on ultra-low dropout performance, while still providing excellent performance and good transient response. It also features automatic power sequencing and over-temperature protection.

Application Field

The S-1711A2J18-I6T1U is well-suited for a wide range of applications including communications, industrial, instrumentation, and consumer products. It is designed for boards that require a compact and low-power platform. The features of this linear voltage regulator make it an attractive choice for a variety of low-cost applications, including point-of-sale systems, security systems, networking systems, and industrial automation.

Working Principle

The S-1711A2J18-I6T1U is a linear voltage regulator which uses an external resistor to form an error amplifier circuit for setting the output voltage. The regulator includes a transconductance amplifier and a divider circuit to feed the reference voltage to the error amplifier. The transconductance amplifier then amplifies the portion of the external reference voltage that is affected by the error signal. The amplified error signal is then fed to the control circuit for regulating output voltage. The control circuit uses an internal high speed oscillator to drive the MOSFET that switches on and off at a frequency determined by the external reference voltage step. The effective duty cycle of the output is determined by the ratio of the time MOSFET is on to the total switching cycle time. This oscillator is also used by the error amplifier to dampen the oscillations that may occur due to the feedback loop.

The S-1711A2J18-I6T1U has several features that increase the accuracy and stability of the output voltage. It has an adjustable current limit circuit to protect against current overloads, and programmable soft-start and UVLO thresholds for greater flexibility. The regulator also includes an internal shutdown logic for monitoring the output voltage and shutting down the regulator if the output goes beyond a certain threshold. Finally, the linear voltage regulator also has over-temperature protection as well as thermal shutdown safety features.

The S-1711A2J18-I6T1U is an ideal choice for cost sensitive applications requiring high efficiency and low footprint. It is designed with integrated features that improve output voltage accuracy and stability, protect against current overloads and temperature changes, and provide flexibility for system designs.

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