RT6257BHGJ6F

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PMIC - Voltage Regulators - DC DC Switching Regulators are integral part of modern power systems. The RT6257BHGJ6F is a DC-DC switching regulator particularly suitable for portable applications, especially for high-current power converters with multiple output voltages regulated by a current-mode control. Its features include: low noise, low output ripple, low supply voltage, low current and high power conversion efficiency. It is ideal for a wide range of applications, from mobile and laptop computing to automotive and professional audio systems.

The RT6257BHGJ6F is a high-efficiency, synchronous switching regulator with peak load current of up to 8A and an adjustable switching frequency up to 2.4MHz, making it suitable for multi-phase systems. It integrates an internal soft-start mechanism and an integrated pull-down resistor to provide simple system operation. The device contains a voltage supervisor that monitors the status of the input and output voltages, and an adjustable-voltage power supply that is designed to meet the needs of low-power, portable applications. The adjustable-voltage power supply offers the flexibility to configure the product for multiple voltages, eliminating the need for a complex external hardware.

The RT6257BHGJ6F works in current mode to provide overcurrent protection and is designed with a wide input voltage range of 4.5V to 28V. It features an active power-on reset and a low-ripple output voltage. The device has a programmable fixed frequency or a frequency range of 150kHz to 2.4MHz, which can be adjusted by using a PWM signal. Its environmentally friendly low operating temperature assists in system thermal management.

The RT6257BHGJ6F can be used in a wide range of applications. In the computer and communication industry, it supports power supplies for notebook motherboards and communication system line cards. In the automobile industry, it provides power supplies for automobile electronic control systems, instruments, navigation systems and in-vehicle entertainment systems. For the robotics industry, it supports power supplies for robot controllers. In the commercial and industrial sectors, it is used in different industrial automation and electronics systems.

RT6257BHGJ6F’s working principle is based on using an internal power control switch to control the current flow between an input and an output in order to regulate the output voltage. It also features adjustable frequency and adjustable soft-start time. The power switch operates in an current mode and can be configured with either a low side or high side N-Channel MOSFET. When the switch is in the ON state, the voltage at the input is higher than the output voltage and energy is supplied to the output. When the switch is in the OFF state, the input voltage is lower than the output voltage and energy is drawn from the output.

The RT6257BHGJ6F integrates several other protection features, such as short-circuit protection, over-temperature protection, and overvoltage protection. It also integrates an adjustable slow start to eliminate any inrush current. To reduce the cost of components, it also features a pre-biased voltage detection circuit that only requires an additional resistor. The device also features a power-good input indicator pin and an output enable pin.

In conclusion, the RT6257BHGJ6F is a wide-input, synchronous buck regulator with high efficiency, high peak current and low noise feature. It is ideal for portable and mobile applications and provides excellent protection features to protect sensitive electrical equipment. It is relatively easy to program and configure using external components, and its adjustable switching frequency makes it suitable for multi-phase, high-power applications.

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