MPQ4420HGJ-Z

Voltage - Input (Max):	36V
Supplier Device Package:	TSOT-23-8
Package / Case:	SOT-23-8 Thin, TSOT-23-8
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	410kHz
Current - Output:	2A
Voltage - Output (Max):	32.4V
Voltage - Output (Min/Fixed):	0.8V
Series:	--
Voltage - Input (Min):	4V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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MPQ4420HGJ-Z application field and working principle

MPQ4420HGJ-Z is a monolithic step-down DC-DC switching regulator manufactured by MPS. It is part of PMIC (Power Management IC) subcategory of Voltage Regulators and it fits into the DC DC Switching Regulators category.MPQ4420HGJ-Z is a high-efficiency, low-noise 3.2A step-down switching regulator with an adjustable output voltage ranging from 0.8V to 6V. It includes an optimized Gate Driver and a 4A current limit device along with an overload protection circuit and a thermal protection. The device supports most popular synchronous rectifier technologies such as Sodium-Ion, Hyper-Light, and Hyper-Fast.The Power Management IC (PMIC) includes a continuous mode, Burst-Mode control architecture, that allows it to have a high efficiency output at a variety of load conditions while avoiding thermal runaway. With the help of its 4-channel PWM controller, it can feed multiple loads or paralleling two or more MPQ4420HGJ-Z devices for higher currents. The device features a wide input voltage operating range from 2.5V to 5.5V, including a low dropout voltage of 48mV at 3.3A load and a low quiescent current of 1µA in Shutdown mode. In order to reduce EMI, the MPQ4420HGJ-Z has a built-in spread spectrum feature. MPQ4420HGJ-Z supports a wide range of safety and protection functions: over current protection (OCP), over voltage protection (OVP), under voltage lockout (UVLO), short circuit protection (SCP), and thermal protection (TSP).The device can be used in the variety of applications, such as cellular phones, digital cameras and portable game consoles, and other low power, highly portable, and low-noise applications where efficiency is essential.

Working Principle

The working principle of MPQ4420HGJ-Z is straightforward. The device is a step-down DC-DC buck converter consisting of an inductor, a switch, a diode, and a capacitor. The device works by converting the input voltage to a different, adjustable output voltage. The device first turns on the switch, energizing the inductor, in order to increase the current through it. Then it turns off the switch and the diode is turned on, which reduces the voltage level. The capacitor provides the filtered output. The switching is done by two distinct digital signals - the MODE (Modeet) signal and the PWM (Pulse Width Modulation) signal. The MODE signal switches between Continuous and Burst-Mode operations, while the PWM signal governs the duty cycle of the switch, thus controlling the output voltage.

Conclusion

In conclusion, MPQ4420HGJ-Z is a monolithic step-down DC-DC switching regulator developed by MPS. It offers high efficiency, low-noise operation with an adjustable output voltage of 0.8V to 6V. The device is suitable for low power, highly portable, and low-noise applications. It includes a wide range of safety and protection functions and supports most popular synchronous rectifier technologies such as Sodium-Ion, Hyper-Light, and Hyper-Fast. The device uses a continuous mode and Burst-Mode control architecture and is actively cooled to maintain its efficiency even at higher load. It is an ideal solution for cellular phones, digital cameras and portable game consoles, and other low power, low-noise applications.

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