MPQ2908AGL-P

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DC DC switching regulators, also known as DC DC converters or power supplies, are used to convert direct current (DC) from one voltage level to another. These devices are used to convert energy from one form to another, such as from electrical to mechanical, or from one voltage level to another. The MPQ2908AGL-P device is a three-phase, non-isolated integrated synchronous rectifier buck switching regulator, designed to facilitate the design of high efficiency, low flyback voltage, synchronous buck regulator solutions.

Application Field

The MPQ2908AGL-P is suitable for a wide range of DC DC regulator applications such as PFC, industrial and computer-related applications, as well as in high-speed switching power supplies, point of load (POL) regulators, telecom power supplies and laser diode driver systems. It is especially suited for fast load transient and high efficiency designs, where the output ripple is kept low by the innovative synchronous rectifier topology.

The device has a fast transient response, with a 250ns small signal response time and a fast loop bandwidth of 2.5MHz. Its on-chip adaptive mode control helps provide noise immunity and helps reduce system size. Its adjustable current limit, soft start, and external PWM dimming control functions provide excellent system stabilization and control over the output voltage and current.

The MPQ2908AGL-P is capable of supporting a maximum output current of 4.2A with a wide adjustment range to minimize power losses. Its output over-voltage protection and current foldback protection help ensure system reliability even in the event of a fault. In addition, the device is designed to minimize electromagnetic interference.

Working Principle

The MPQ2908AGL-P is a synchronous rectifier buck switching regulator. Synchronous rectification helps reduce power losses, and the P-channel MOSFETs used in the device reduce gate drive requirements. The regulator consists of an internal high-side MOSFET switch and a P-channel synchronous rectifier MOSFET, which are driven by an internal oscillator and a control loop.

The main feature of the device is its ability to operate at near zero-voltage switch-off. When the MOSFET switch turns on, the voltage of the control loop is monitored and matched to the voltage of the output. The input voltage is then converted to a lower output voltage with a high efficiency. A high frequency, low-distortion pulse width modulation (PWM) signal is generated by the control loop, which drives the MOSFETs to produce the required output voltage.

In order to ensure reliable operation, the MPQ2908AGL-P features an internal temperature sensing circuit and an adjustable current limit. In addition, the device also features an adjustable soft start, an external PWM dimming control, and a programmable over-voltage protection. These features help to reduce start-up time and maintain a stable system even in the event of a fault.

Conclusion

The MPQ2908AGL-P is a three-phase, non-isolated integrated synchronous rectifier buck switching regulator, designed to facilitate the design of high efficiency, low flyback voltage, synchronous buck regulator solutions. It is suitable for a wide range of applications, such as PFC, industrial, and computer-related applications, as well as in high-speed switching power supplies, point of load (POL) regulators, telecom power supplies and laser diode driver systems. The device offers excellent transient response, fast loop bandwidth, and adjustable current limit, soft start, and external PWM dimming control functions, which help provide system stability and control over the output voltage and current.

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