IR3899MTRPBF

Voltage - Output (Min/Fixed):	0.5V
Base Part Number:	IR3899MPBF
Supplier Device Package:	16-PQFN (4x5)
Package / Case:	16-PowerVQFN
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	300kHz ~ 1.5MHz
Current - Output:	9A
Voltage - Output (Max):	18.06V
Series:	SupIRBuck®
Voltage - Input (Max):	21V
Voltage - Input (Min):	1V
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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IR3899MTRPBF: an Overview

The IR3899MTRPBF is a PMIC (Power Management Integrated Circuit) that is specifically used as part of a voltage regulation circuit. It falls under the broad class of DC DC switching regulators, and is known for its ability to take a wide range of input voltages and output regulated, clean power.The IR3899MTRPBF provides up to 37A of output current, integrated prebias, slope control, adjustable overcurrent protection, and adjustable thermal resistant current foldback and reverse current protection. It is a voltage regulator highly suitable for automotive, industrial, and other applications operating in varying, harsh conditions.

Different Applications

The IR3899MTRPBF is an efficient, reliable, cost-effective and low harmonic distortion system, offering users a great range of options and possibilities. The integrated voltage regulation system is ideal for various applications such as audio and video systems, home appliance communication devices, medical devices, and automotive components.The unit provides variable voltage output, which can be used for timing and control circuits, as well as for powering memory or other integrated circuitry. The switched-mode power supplies (SMPS) of the IR3899MTRPBF are highly suitable for GDDR memory and other applications. It can also work in a wide range of frequencies, with selectable phases and dual output.

Working Principle

The IR3899MTRPBF is a synchronous switching regulator operated on the Closed Loop Buck topology. This topology is highly efficient and provides great thermal resistance and ratio of output current. The IC has a maximum current of 37A with a maximum junction temperature of 175°C.When the input voltage is applied across the IC, it creates an internal channel between the lower chip’s high-side switch (upper mosfet) and the upper chip’s low-side switch (lower mosfet). This channel carries the input voltage and produces the output voltage. The output voltage is regulated by controlling the duty cycle of the switches.The duty cycle of the switches is controlled by the error amplifier of the IC. The error amplifier generates an output voltage that is proportional to the load current, which is fed back to the gate of the upper mosfet. The error amplifier also feeds an internal comparator that controls the PWM modulator, regulating the power output to the load. The IR3899MTRPBF is a voltage regulator that offers efficient, reliable and cost-effective solutions for many power management applications. The unit can operate in a wide range of frequencies and its integrated protection features provide excellent protection to the load. It is suitable for use in industrial, automotive and audio applications, providing robust and reliable power output.

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