MP2357DJ-LF-ZX

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MP2357DJ-LF-ZX is a cost optimized non-synchronous DC/DC buck converter that has an integrated low side power switch and an internal 380 mΩ high side power switch. It supports up to 1.5A of output current from an input of 3.1V to 6V with a minimum output voltage of 0.6V. It is ideal for low input voltage applications such as handheld devices or others.

The MP2357DJ-LF-ZX’s built-in features make it an ideal solution for a range of different applications. It features over-temperature protection, over-voltage protection, as well as soft start and over-discharge protection all in a small footprint - ideal for low power applications.

The power efficiency of this device ranges from 90% to 97%, depending on load conditions, making it an ideal solution for low power variable load applications. The MP2357DJ-LF-ZX also includes integrated short circuit protection for increased safety.

MP2357DJ-LF-ZX is a DC to DC switching regulator from PMIC voltage regulators family. This switching regulator is optimized for cost, size, and power with its size at 2.5x2.5mm and it’s input range from 3.1V to 6V. It is able to support up to 1.5A of output current and requires a minimum output voltage of 0.6V.

The onboard protection features this device has makes it ideal for handheld devices, low input voltage applications and any low power variable load applications. These features include but not limited to, over-temperature protection, soft start and over-discharge protection.

The power efficiency is stated to range from 90% to 97%, and this is highly dependent on the load conditions. This DC to DC switching regulator also has an integrated short circuit protection for enhanced safety. The size of this buck converter also allows for it to be used in space-limited applications.

Working principle of buck converter is based on pulse width modulation. The controller chip MP2357DJ-LF-ZX receives the signal from comparator circuit, which consists of voltage and current feedback signal. According to the feedback, it can control the gate voltage of the power switch MOSFET and decide the pulse width of PWM signal. Meanwhile, the signal will drive the PWM dimming control circuit, a Zener diode or logic chip, and adjust the resistance of voltage-dividing network to obtain a stable output voltage. After calculations, the controller chip can output a PWM signal to the power switch MOS, and the duty of this signal will decide the output voltage.

In summary, MP2357DJ-LF-ZX is a low cost and non-synchronous DC/DC Buck Converter from PMIC Voltage Regulators with 1.5A of output current from input voltage of 3.1V to 6V with minimum output voltage of 0.6V. It is ideal for low input voltage applications and is ideal for low power variable load applications. This device offers over-temperature protection, soft start, over-voltage protection and over-discharge protection as well as integrated short circuit protection. The working principle is based on pulse width modulation.

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