IR3801AMTRPBF Integrated Circuits (ICs)

Voltage - Output (Min/Fixed):	0.6V
Base Part Number:	IR3801AMPBF
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:	300kHz
Current - Output:	9A
Voltage - Output (Max):	12V
Series:	SupIRBuck®
Voltage - Input (Max):	21V
Voltage - Input (Min):	2.5V
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Part Status:	Obsolete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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Introduction

IR3801AMTRPBF is a Rectified Buck Regulator driver module designed for high efficiency, high frequency switch mode power supply (SMPS) applications that require current monitoring capabilities and synchronous frequency control. The device integrates a voltage regulator and a power mosfet and is suitable for boosting, buck-boost, step-down and step-up DC-DC conversion. This device can produce a constant output voltage over a wide duty cycle and features fault protection, voltage monitoring (VMON) pins, and programmable frequency and current limit. The IR3801AMTRPBF is an excellent choice for efficient power conversion in portable power and industrial applications.

Application Fields

IR3801AMTRPBF is designed for applications that require high frequency switch mode power supplies (SMPS) with current monitoring capabilities and synchronous frequency control. The control loop of the device allows for easy implementation of Boost/Buck-Boost, Step-Down, and Step- Up voltage conversion with fixed frequency and/or forced current limit. The IR3801AMTRPBF is well-suited for powering portable products, such as mobile phones and laptops, as well as automotive and industrial applications.

General Features

The IR3801AMTRPBF integrates all the necessary components for a synchronous switch mode voltage conversion, including a voltage regulator, a power mosfet, and fault protection circuitry. It also includes several features to make it well-suited for most applications, including an internal MOSFET driver, soft-start function, voltage monitoring pins, programmable current limit and switching frequency. The device\'s flexibility and robustness make it an ideal solution for designs requiring efficient, low-noise voltage conversion.

Working Principle

The IR3801AMTRPBF is a synchronous switch mode DC-DC converter with fixed frequency and/or forced current limit. The device integrates a high-efficiency MOSFET driver and a synchronous controller. It can operate in a variety of switch mode conversion topologies, includingBoost, Buck-Boost, Step-Down, and Step-Up conversions with fixed frequency and/or forced current limit. The device supports current monitoring functions and has fault protection functions, including over-voltage, over- current, over-temperature and under-voltage protection.The device works by first sensing the input voltage and comparing it with the reference voltage from a predetermined voltage reference voltage. This difference is known as the error voltage and is used by the device to drive a power MOSFET switch. The power mosfet is driven by a PWM signal which is then used to regulate the output voltage. The current in the power mosfet is monitored and compared with the internally set current limit, which is used to control the duty cycle of the signal and thus regulate the output voltage. The switching frequency of the device can be programmed via an external resistor.

Benefits

The IR3801AMTRPBF offers several benefits compared to traditional switch–mode DC-DC converters. Firstly, it uses a synchronous converter topology which results in higher power conversion efficiency than typical non-synchronous converters. The use of a synchronous controller also helps to reduce output ripple, as well as reduce power losses and improve device lifetime. Additionally, the device has voltage monitoring pins which enable the user to monitor the input and output voltages, helping to prevent unsafe operation of the power supply. The device also provides fault protection and has programmable current limit and switching frequency settings, making it well-suited for a wide range of applications.

Conclusion

The IR3801AMTRPBF is an ideal choice for applications that require efficient power conversion at high frequencies. The device integrates all the necessary components for high-efficiency, low-noise voltage conversion, including a voltage regulator, a power mosfet, fault protection, voltage monitoring (VMON) pins, and programmable frequency and current limit. The synchronized controller, fixed frequency and/or forced current limit operation, and current monitoring features make it an ideal solution for powering portable products and many industrial applications.

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