IR3856WMTRPBF

Voltage - Output (Min/Fixed):	0.7V
Base Part Number:	IR3856WMPBF
Supplier Device Package:	17-PQFN (4x5)
Package / Case:	17-PowerVQFN
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	225kHz ~ 1.65MHz
Current - Output:	6A
Voltage - Output (Max):	14.4V
Series:	SupIRBuck®
Voltage - Input (Max):	16V
Voltage - Input (Min):	1.5V
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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DC-DC Switching Regulators - IR3856WMTRPBF Application Field and Working Principle

DC-DC switching regulators are versatile power conversion solutions that can help increase energy efficiency, reduce overall system power costs, and reduce the environmental impact of power systems. The IR3856WMTRPBF is a highly integrated DC-DC booster switching regulator from Infineon, featuring an integrated oscillator, dual MOSFETs, and an internal comparator. It provides an ideal power-conversion solution for applications ranging from mobile and handheld devices to more demanding industrial and automotive solutions.

Features and Benefits

The IR3856WMTRPBF is a monolithic 3-pin device, powered by a single input voltage between 3.2V and 18V. It can be used with most commonly available metal oxide semiconductor field-effect transistors (MOSFETs). The device integrates an internal feedback voltage generator, which provides the desired output voltage through its 2 external feedback pins. Its low output ripple and low noise operation ensure a stable output voltage. The switching regulator also offers various protection features such as over current protection and over temperature protection, ensuring safe operation. The device also offers low-ripple operation, which helps minimize load-induced ripple and minimize energy wasted as heat.

Applications

The IR3856WMTRPBF is suitable for a variety of applications, including mobile devices, datacenter infrastructure, and industrial or automotive solutions that require high power-conversion efficiency. The device is also well-suited for applications where fast start-up times and operating times are required such as LED lighting, LED driver modules, and portable medical devices.

Working Principle

The working principle of the IR3856WMTRPBF DC-DC switching regulator relies on the same principles as other DC-DC devices. In a DC-DC switching regulator, an integrated circuit (IC) runs a pulse-width modulator (PWM), which turns the output voltage "on" and "off" to create a high-frequency switching current. This current is then regulated by the feedback control circuit, which maintains a stable output voltage regardless of input voltage, load, or environmental conditions. The switching regulator is capable of both step-up and step-down conversion, depending on the desired output voltage.The IR3856WMTRPBF switching regulator uses a high-frequency PWM generator and oscillator to create a regulated higher voltage output. The high-frequency ripple, generated by the switching regulator, is filtered out by an inductor and capacitors. The high-frequency current then passes through two MOSFETs, which can be controlled by a feedback controller. The parameter of the proposed design is set by the internal oscillator, which operates within an adjustable frequency range. The frequency of the internal oscillator determines the high voltage output of the switching regulator.

Conclusion

The IR3856WMTRPBF is an ideal DC-DC switching regulator for power-conversion solutions in applications ranging from mobile devices to demanding industrial and automotive solutions. It is a monolithic 3-pin device, powered by a single input voltage between 3.2 and 18V, and it integrates an oscillator, dual MOSFETs, and an internal comparator, making it a highly efficient and reliable power-conversion solution. The device offers low ripple operation, adjustable frequency range, fast start-up times and operating times, and protection features such as over current and temperature protection.

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