IR3843AMTR1PBF

Voltage - Output (Min/Fixed):	0.7V
Base Part Number:	IR3843AMPBF
Supplier Device Package:	PQFN (5x6)
Package / Case:	15-PowerVQFN
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	225kHz ~ 1.32MHz
Current - Output:	3A
Voltage - Output (Max):	18.9V
Series:	SupIRBuck®
Voltage - Input (Max):	21V
Voltage - Input (Min):	1.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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IR3843AMTR1PBF Application Field and Working Principle

IR3843AMTR1PBF is a high-precision, high-performance synchronous Buck (Step-Down) regulator that operates from 1.5V to 14V input supply voltage. It is classified under power management integrated circuits (PMIC) voltage regulators, specifically DC DC switching regulators. This regulator can generate up to 1.5A of output current. It is primarily used for supplying power to system on a chip (SoC) or any other application with low-voltage demands, such as digital cameras and notebooks.

Features

The IR3843AMTR1PBF offers several features that, when compared with linear regulators, make it even more desirable in modern applications. * Fixed 3.3V, 5V and 12V output selections* Low output ripple* High power conversion efficiency * Internal switching frequency* Built-in current and thermal limiting* Low quiescent current* Output voltage tracking* Soft-start current limit

Application Field

Thanks to its many features, the IR3843AMTR1PBF is ideal for use in a wide range of applications, such as:* Industrial and medical equipment requiring precision power supply* Motion control systems* Automotive applications* High-definition video projectors* Personal computers* TV-tuners

Working Principle

The IR3843AMTR1PBF is based on a buck converter topology. A buck converter is a type of switching regulator that is used to convert a higher input voltage to a lower output voltage. This can be done with high efficiency and in a very small form factor. It works by opening and closing a switch at high frequency. This causes the input voltage to pass through an inductor and through the switch over and over again. This action helps in stepping down the input voltage. When the switch is closed, the energy stored in the inductor is released and used to power the load.

Conclusion

The IR3843AMTR1PBF is a high-precision, high-performance synchronous Buck regulator. It is classified as a PMIC – Voltage Regulators – DC DC Switching Regulators, and is primarily used for supplying power to SoC or other low-voltage demand applications. Thanks to its many features, the IR3843AMTR1PBF is ideal for use in a wide range of applications, such as industrial and medical equipment, motion control systems, automotive applications, high-definition projectors, etc. The IR3843AMTR1PBF is based on a buck converter topology, which works by opening and closing a switch at high frequency, resulting in a stepped down output voltage.

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