MB3759PF-G-BND-JN-ERE1

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MB3759PF-G-BND-JN-ERE1 Application Field and Working Principle

The MB3759PF-G-BND-JN-ERE1 is part of the Microchip Technology line of Power Management and Control (PMC) solutions and is a single-output,-switching voltage regulator controllable via pulse width modulation (PWM). This regulatoris specifically designed for low power DC-DC converters for portable applications incircuits powered by one or two Lithium cells and has an output voltage range from 2.7V to 5.5V.

Application Field

The MB3759PF-G-BND-JN-ERE1 makes for an ideal solution for battery-powered devices and portable electronics. Some of the applications that this controller chip can be applied to include mobile phones, digital cameras, PDAs and laptop computers. It is also applicablefor use in automotive and industrial applications. Examples of automotive applications include power supplies for car radio, GPS, car audio and security systems.

Working Principle

The MB3759PF-G-BND-JN-ERE1 switching regulator works by converting the input DC voltage to an output DC voltage using pulse width modulated (PWM) control. This is accomplished by controlling the duty cycle of the PWM signal. A duty cycle of 100%would mean that the input voltage is equal to the output voltage, while a duty cycle of 0% would mean that the output voltage is equal to 0V. The duty cycleof the PWM signal is controlled in proportion to the input voltage to maintain the output voltage at a selected level. The MB3759PF-G-BND-JN-ERE1 uses a built-in oscillator to generate the PWM. This oscillator can be programmed through an externalcapacitor for optimal performance and flexibility.

The MB3759PF-G-BND-JN-ERE1 also features an Auto-Restart mode. This mode preventsover-voltage and over-current faults by automatically restarting the operation of the regulator aftera fault has been detected and rectified. The Auto-Restart mode further provides protection against reverse battery connections, abnormal output voltage and current, and thermal protection.

Conclusion

The Microchip Technology MB3759PF-G-BND-JN-ERE1 switching regulator is an ideal choice forpowering portable electronic devices. Its use of PWM control together with the built-in oscillatorand Auto-Restart mode make for an efficient and long-lasting PMIC solution.

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