MAX731CWE+T

Voltage - Output (Min/Fixed):	5V
Base Part Number:	MAX731
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	170kHz
Current - Output:	1.5A (Switch)
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.25V
Voltage - Input (Min):	2.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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MAX731CWE+T Application Field and Working Principle

The MAX731CWE+T is a DC-DC switching regulator that is widely used within PMIC (power management integrated circuit) applications. This device offers a simple and cost effective solution for applications that require high efficiency, low output noise and good transient response. The MAX731CWE+T can be used in a wide range of voltage applications and is designed for use with 3.3V, 5V and 12V inputs and with an adjustable output.

Application Fields

The MAX731CWE+T is suitable for use in applications such as device power management and system power management, including:

• Digital Signal Processors (DSPs)
• Microcontrollers
• Wireless and wired modems
• Digital cameras
• GPS receivers
• Portable multimedia players
• Embedded systems

Typically, the MAX731CWE+T will be used in an application where high efficiency, low output noise and good transient response are required. It is also ideal for applications where a wide range of voltage requirements are encountered, as it can be used with different input voltages and adjustable output voltages.

Features and Benefits

The MAX731CWE+T offers a number of features and benefits, including:

• Very low quiescent current which makes it suitable for low power applications
• High efficiency and very low output noise
• Good transient response and high output ripple rejection
• Compact size which allows it to be used in space-critical applications
• Output voltage up to 15V
• Adjustable output voltage range

Working Principle

The MAX731CWE+T works by using Pulse Width Modulation (PWM) to control its output voltage. In this type of circuit, an oscillator produces a square wave at a frequency which is determined by the values of resistors and capacitors connected to it. This square wave is then applied to the gate of the power switch, which switches the power on and off.The PWM circuit contains three components: the power switch, the oscillator and the comparator. The power switch controls the pulse width of the square wave, with a longer pulse resulting in a higher output voltage. The oscillator produces the square wave, while the comparator compares the reference voltage with a feedback voltage from the output of the regulator. When the feedback voltage is lower than the reference voltage, the comparator output is logic high, reducing the pulse width and lowering the output voltage. When the feedback voltage is higher than the reference voltage, the comparator output is logic low, resulting in a larger pulse width and a higher output voltage.

Conclusion

The MAX731CWE+T is a versatile DC-DC switching regulator that is perfect for a range of PMIC applications. Its low power consumption, good transient response, high output ripple rejection and adjustable output voltage range make it ideal for high efficiency and low noise applications. Its compact size and adjustable output voltage range also make it suitable for applications where space is limited.

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