MAX16977SATE+

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MAX16977SATE+ Application Field and Working Principle

The MAX16977SATE+ is a synchronous step-down (buck) switching regulator controller. It is a general-purpose PMIC with a voltage regulator family member for DC-DC conversion, targeted for a wide range of system power applications. This device provides a complete synchronous buck solution to meet a tiny, highly efficient solution.

The device is designed to comply with high-temperature requirements, allowing it to be used in automotive and industrial applications. The controller supports a wide input voltage range from 6V to 42V, and the regulated output voltage can be set between 0.6V and 5.5V. The MAX16977SATE+ run at a wide frequency range from 300kHz to 2.2MHz, and it provides two pulse-width modulation (PWM) outputs, one for control of the high-side MOSFET, and one for control of the low-side MOSFET. It also includes a fixed frequency oscillator with programmable frequency. It has implemented a current mode operation with gain-compensation, with an adjustable voltage-feedback signal, and it supports power-saving mode (low-power mode).

Application Field

The MAX16977SATE+ is ideal for automotive, consumer and industrial applications. It can provide the necessary step-down switching regulator to power microprocessors, FPGAs and other system components. It is also used in applications such as automotive motors and industrial drives.

Working Principle

The MAX16977SATE+ synchronous buck switching regulator controller supports up to 9-A output current with a wide range of switching frequencies, a programmable voltage-feedback signal and an additional power saving mode. The device works by using the voltage from the input side to drive the buck switch, and the controller determines the output voltage based on the voltage-feedback signal. The output voltage is then regulated by varying the duty cycle of the buck switch.

The maximum output current is set by two internal current limit functions. The output current limit (OCL) sets the switch current to the maximum limit of 9A, while the inrush current limit (ICL) will limit the inrush current below a certain off-time to reduce the input capacitance requirement. The MAX16977SATE+ also provides a fixed frequency oscillator with programmable frequency. The controller is also designed for high-temperature operation and can meet the requirements for automotive and industrial applications.

Conclusion

The MAX16977SATE+ is a synchronous step-down switching regulator controller that is suitable for automotive, consumer and industrial applications. It can provide up to 9-A of output current and a wide range of switching frequencies, with a programmable voltage-feedback signal and an additional low-power mode. The device is also designed to support high-temperature operation, making it suitable for automotive and industrial applications.

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