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PMIC - AC DC Converters, Offline Switchers

The NCP12510SN100T1G is an integrated offline switcher used in applications where a compact solution is required. The NCP12510SN100T1G is a single-switch buck converter with an input voltage range of 8 V to 57 V. Output voltage is adjustable between 0.6 V and 4.5 V with a maximum output current of 100 mA. The NCP12510SN100T1G is a flexible solution for powering DC/DC converters where its 200kHz operation frequency means that a smaller output filter can be used compared to non-synchronous switchers.

The NCP12510SN100T1G is designed to withstand an adjustable output voltage transient of up to 45V and its integrated output voltage sense amplifier allows efficient dynamic voltage scaling. The NCP12510SN100T1G also offers integrated switching-current limiting control and over-current protection.

Application Field of NCP12510SN100T1G

The NCP12510SN100T1G is suitable for use in a variety of applications, such as lighting systems, medical devices, automotive systems, consumer electronics, industrial equipment, and general-purpose power supplies. It is available in a compact 4mmx4mm quad flat no lead (QFN) package and is designed for high efficiency and low power consumption.

The NCP12510SN100T1G has been designed for use in high-power, high-efficiency applications where reliability and low heat generation are important. The NCP12510SN100T1G is suitable for use in applications where a regulated, low-ripple output voltage is needed and high EMI performance is critical.

Working Principle of NCP12510SN100T1G

The NCP12510SN100T1G operates in a synchronous buck topology and uses a single metal-oxide semiconductor field-effect transistor (MOSFET) switch to regulate the output voltage by controlling the amount of time current is drawn from the input voltage source. In a synchronous buck converter, the ideal transfer function is created by controlling the switch on time, or duty cycle, of the switch.

The switch on time is determined by the control loop within the device. The control loop is designed to compare the actual output voltage on the feedback node to an internally generated reference voltage and then adjust the switch on time accordingly to maintain a constant output voltage, regardless of the load current or input voltage variations.

The NCP12510SN100T1G also features a fast transient response with minimal output voltage droop, enabling it to regulate a reliable steady state output voltage. The NCP12510SN100T1G also offers integrated protection features such as current limit, over-voltage protection and input under-voltage lockout.

Conclusion

The NCP12510SN100T1G is a highly integrated and programmable single-switch DC/DC converter providing an adjustable output voltage range of 0.6 V to 4.5 V with a maximum output current of 100 mA. The NCP12510SN100T1G is ideally suited for lighting systems, medical devices, automotive systems, consumer electronics, industrial equipment and general-purpose power supplies where fast transient response and reliable steady state performance is essential.

The NCP12510SN100T1G operates in a synchronous buck converter topology, with a control loop designed to ensure a constant output voltage, regardless of the load current or input voltage variations. It also features integrated protection features such as current limit, over-voltage protection and input under-voltage lockout.

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