MP2108DK-LF-P

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PMIC - Voltage Regulators - DC DC Switching Regulators

MP2108DK-LF-P is an advanced DC-DC buck (step-down) switching regulator that integrates power MOSFETs, current sense, loop compensation and feature rich protection circuitry in an industry-standard package. It is designed for cost-sensitive applications such as telecom, computer, and home appliances.

The MP2108DK-LF-P family is available with a wide input voltage range, a fast transient response and a low supply current. It includes an enable input and many safety features, such as undervoltage lockout, thermal shutdown, and short-circuit protection. The device provides very low output ripple. It has good transient response and allows higher capacitive loads.

Application Field

The MP2108DK-LF-P is ideal for a wide range of telecom, computer, and home appliance applications. Its wide input voltage range makes it suitable for a wide range of applications which require regulated voltage from 4.5V to 24V. Its fast transient response and low supply current make it well suited for applications such as TV sets, laptop and tablet computers, LCD monitors, set-top boxes, gaming consoles and other consumer electronics.

Working Principle

The MP2108DK-LF-P uses a synchronous buck topology to efficiently transfer energy from an input voltage source to an output voltage load. In this topology, an inductor is used to store energy during switch transitions. This energy is used to power the output voltage load. The device contains a circuit that controls the switching of the power MOSFETs and regulates the output voltage. It also contains a current sense circuit to detect the output current and shut off the device in case of a short circuit.

The device can operate in either pulse width modulation (PWM) or pulse frequency modulation (PFM) mode. In PWM mode, the device switches the MOSFETs at a constant frequency, and the duty cycle is modulated to maintain the output voltage level. In PFM mode, the device switches the MOSFETs at a higher frequency and then lowers the frequency as the output voltage approaches the setpoint. This results in a lower switching frequency and lower power dissipation.

The device features a non-overlapping drive circuitry which ensures low supply currents and provides an accurate transition between high and low states, resulting in fast transient response. The device features a programmable soft start to reduce in-rush currents. It also includes an enable input which can be used to turn off the output and reduce the power dissipation.

The device includes many safety features such as undervoltage lockout and thermal shutdown. The device also has an input current limit, output current limit, and short-circuit protection, which ensure safe operation even in fault conditions. It also includes internal loop compensation for improved stability and transient response.

The MP2108DK-LF-P is the ideal solution for cost-sensitive applications that require fast transient response, low supply current and a wide input voltage range.

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