S-8521E18MC-BLDT2G

S-8521E18MC-BLDT2G Application Field and Working Principle

The introduction of S-8521E18MC-BLDT2G chip gives designers more robust power conversion options. A comprehensive comprehensive solution that combines Switch Mode Power Supply (SMPS) regulator, switching controller and voltage detectors, S-8521E18MC-BLDT2G power supply units have been well designed for use in Point-of-Load (POL) converters, Stand-By Power Supply, DC-DC converter, such as DC buck converters and regulators.

S-8521E18MC-BLDT2Gis a Power Management Integrated Circuit (PMIC) device used for Voltage Regulation, DC-DC Switching Controllers. The S-8521E18MC-BLDT2G primarily provides voltage regulation in the form of a linear regulator or a switching regulator. This regulator contains all the components necessary to convert the power input voltage to a regulated output voltage.

The S-8521E18MC-BLDT2G power supply unit combines both synchronous and non-synchronous rectification topologies (single or dual-phase). It also offers high efficiency, high power density, good thermal/competition characteristics, and flexible synchronization capability (synchronous mode only).

The S-8521E18MC-BLDT2G is designed with a one-cycle control loop for superior transient performance and robustness in harsh environments. It also features adaptive on-time control for excellent noise performance. Additionally, the S-8521E18MC-BLDT2G includes a built-in voltage detector and adjustable fault protection.

Working Principle

The S-8521E18MC-BLDT2G is a DC-DC switching controller that works by converting the input voltage to an output voltage in a boost, buck, or buck-boost topology. The device controls the switch of a power MOSFET or a power transistor in order to lower or raise the input voltage. This switching is usually done at a frequency of hundreds of Kilohertz (kHz).

The control unit inside the S-8521E18MC-BLDT2G will determine the voltage regulation range. The voltage regulation range can be adjusted by connecting the voltage divider. In addition, a preset output voltage level and overcurrent protection can be provided by utilising the internal UVLO and OCP pins.

The internal protection blocks include overvoltage (OV), overcurrent (OCP), undervoltage (UVLO), and short circuit (SC) protection. The device also includes a built-in thermal shutdown function for over-temperature protection.

The device is powered by the control logic and supply rails. The control logic supplies a reference voltage to the device to determine the output voltage. The supply rails provide power to the device.

The S-8521E18MC-BLDT2G is well suited for applications in the Point-of-Load (POL) converters, Stand-By Power Supply, DC-DC converters, DC buck converters and regulators.

Conclusion

The S-8521E18MC-BLDT2G is a PMIC device used for voltage regulation and DC-DC switching controllers. It is designed with a one-cycle control loop for superior transient performance and robustness in rugged environments. The device combines both synchronous and non-synchronous rectification topologies and offers adjustable fault protection, high efficiency, and flexible synchronization capability. It is suitable for applications in the Point-of-Load (POL) converters, Stand-By Power Supply, DC-DC converters, DC buck converters and regulators.