S-8521D18MC-BXDT2U Integrated Circuits (ICs)

Voltage - Supply (Vcc/Vdd):	2.5 V ~ 16 V
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	100%
Frequency - Switching:	60kHz
Series:	--
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to S-8521D18MC-BXDT2U DC DC Switching Controllers

S-8521D18MC-BXDT2U is an integrated DC DC switching controller. This device offers excellent efficiency, high accuracy, and small size, making it well suited for a variety of applications. This device is especially suited for automotive applications, power supply design and output power management.

Application Field

S-8521D18MC-BXDT2U DC DC switching controllers are used to regulate and convert DC power sources, such as vehicle or battery power. The S-8521D18MC-BXDT2U is designed to provide a constant regulated voltage, allowing users to adjust the output current and power capacity to suit their specific application needs. This controller has a wide range of applications, such as in industrial equipment, telecommunications, mobile phones, automotive, computers and peripherals, and audio / video equipment.

Working Principle

The S-8521D18MC-BXDT2U is a DC DC switching controller. It operates on a buck-boost topology, providing constant voltage with very good efficiency even at light loads.The device\'s output current is regulated by a current limiter circuit. A summing amplifier (Lam-Voltamp) is included to monitor the output voltage and adjusts the duty cycle accordingly to maintain the regulated voltage.The device also features an adjustable oscillator, allowing users to adjust the switching frequency and power efficiency characteristics to match the specific requirements of their application.The current senses the output current and adjusts the duty cycle to keep the output voltage constant. Once the device detects an over-current situation, it shuts down the PWM signal and turns off the switching transistor.The S-8521D18MC-BXDT2U has an adjustable soft start feature that prevents over-current situations during the start-up procedure.Finally, the device includes several system protection and fail safe features such as output over-voltage and over-temperature protection. The device also includes an open-drain power-good signal and a low voltage lock-out function.

Conclusion

S-8521D18MC-BXDT2U is a DC DC switching controller designed for a wide range of applications. It features excellent efficiency, high accuracy, small size and several protection features, making it well suited for a variety of applications. The device operates on a buck-boost topology, provides constant voltage with very good efficiency and has adjustable oscillator, current limiter and a SUM Amp Vout feature to maintain the output voltage. It also includes a soft start feature and several protection features to ensure safety and reliability.

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