MP2128DG-LF-P

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MP2128DG-LF-P is a device of DC DC switching regulators which is used as part of a power management integrated circuit (PMIC). It provides maximum efficacy during a long time and requires small solution size. In addition, it has adjustable output power and low quiescent current.

The primary application field of the MP2128DG-LF-P is for systems where space and cost is a concern such as drones, drones with cameras, robotic systems, mobile phones, and tablets. However, it can be wrapped up as a module to be used in any application where more than two voltage rails are desired.

MP2128DG-LF-P is a DC/DC step-down converter which is able to convert 3.2V to 5.5V inputs to adjustable output voltage between 1.2V and 5V. Its maximum output current is limited to 3A and at that current it can provide high efficiency with a maximum of 96%. It is adjustable to maximum current and comes with an over-current protection circuit.

It supports both pulse-width modulation (PWM) and pulse frequency modulation (PFM) control. The PWM mode allows for low-noise operation, whereas the PFM mode is enabled during light loads to provide an even lower quiescent current, further increasing efficiency. Operating frequency is adjustable and regulated within the range of 100KHz to 500KHz.

The core of the MP2128DG-LF-P is a buck regulator with integrated high-side FET and low-side diode. Its working principle is based on the usage of an inductor which reacts to the digital switching signal from the PWM controller, changing its input voltage to the desired output voltage. It works in a continuous conduction mode, allowing for a fast transient response, since the output voltage is dependent on the duty cycle of the switching signal.

The MP2128DG-LF-P also integrates several protective circuits to ensure robust operation over a long time. It has over-current protection, load-transient protection as well as MOSFET short-circuit protection, giving it an extremely wide operating temperature range, from -40C to 85C.

The MP2128DG-LF-P is an ideal components for maximizing system efficacy, requiring small solution size and low quiescent current. It can be used in variety of applications with adjustable output power while providing a wide coverage of system protection.

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