SC4520SETRT

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SC4520SETRT is a synchronous buck controller, providing constant voltage and current output. It is a device in the category of PMIC (Power Management IC), Voltage Regulators, and DC-DC Switching Regulators. It is especially suitable for applications ranging from communications to consumer electronics.

The SC4520SETRT employing an internal high-performance voltage mode control, switching current mode control, and burst mode control. It generally works by applying a voltage input from the device to be regulated, and then converting the power from high voltages to the desired low voltage. The buck control is based on voltage order, providing continuous regulating of the output voltage. The high output power efficiency of the SC4520SETRT is achieved by using a synchronous buck control technique, whose highest efficiency reaches 96%.

The SC4520SETRT provides a wide voltage adjustment range for the output voltage, typically from 6V – 18V. It also has an input voltage range of 8.5V – 40V, with a peak efficiency of up to 96%. The device supports output current up to 4A, with an enhanced current sense accuracy to 0.05%. The switching frequency is adjustable through the external resistor in three options, 375KHz, 600KHz and 1000KHz.

Device protection features include a programmable over-voltage protection (OVP) in conjunction with a dedicated OVP comparator, cycle-by-cycle current limit protection, adjustable over-temperature protection (OTP), and switching current sense soft-start.

The SC4520SETRT is controlled by an integrated voltage error amplifier and PWM comparator, offering the features of low supply current and fast transient performance. It has an open-drain logic pin for system shutdown, allowing the controller to be easily integrated into an existing power supply design. In addition, it has an anti-reset latch feature for protecting the controller from an unexpected reset.

The device provides fast-transient response and accurate output. By tuning the timing capacitor and the external resistor, system designers can optimize the output voltage response time, range, accuracy and stability. All the above advantages make it a powerful solution for many application fields like mobile phone chargers, notebook power adapters, and other similar applications.

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