MAX16956AUBB+

Voltage - Input (Max):	36V
Supplier Device Package:	10-uMAX
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	2.1MHz
Current - Output:	300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Series:	--
Voltage - Input (Min):	3.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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MAX16956AUBB+ DC/DC Switching Regulator Applications and Working Principles

DC/DC switching regulators are devices used to efficiently convert a higher level of direct current (DC) power source to a lower level one. The MAX16956AUBB+ from Maxim Integrated is an innovative DC/DC buck-boost switching regulator with an I²C interface that is specifically designed for automotive and wearable applications.

Applications

The MAX16956AUBB+ is ideal for powering automotive and wearable systems that require a range of output voltages up to 28V. It has one buck-boost output with integrated FET switching, allowing it to step down, as well as step up, the input voltage to the desired level. The device can be used in a wide variety of applications such as powering motors, sensors, relay coils, and displays. The MAX16956AUBB+ offers an adjustable output current of up to 3A, allowing it to deliver sufficient power to cover high-power applications. Furthermore, it features an array of features that help extend battery life, such as integrated power-saving features and adaptive DPPM modes. These features help reduce quiescent current, improving efficiency and extending the battery life of the device. With its I²C interface, MAX16956AUBB+ makes it easy for engineers to customize and control the device for specific applications. It allows for a great amount of flexibility, as the user can adjust the output voltage, as well as the current limit and enable/disable for different loads.

Working Principle

The MAX16956AUBB+ is a buck-boost switching regulator that can both step down and step up a varying input voltage source in order to meet the desired load voltage. It features one internal synchronous buck-boost controller, a single N-channel MOSFET switch and one synchronous rectifier. The internal buck-boost controller adjusts the current-limit thresholds, soft-start period, programmable feed-forward compensation, and power-saving features. This allows the user to customize the device’s behavior to meet their specific application’s requirements. When the device is enabled, the MOSFET switch is turned on, allowing current to flow. The internal controller then adjusts the duty cycle of the MOSFET to control the output voltage and current as needed. The synchronous rectifier is then used to rectify the output voltage and current back to a DC voltage.The output voltage (VOUT) is determined by subtracting the MOSFET voltage drop from the input voltage (VIN): VOUT = VIN –VDS(on) Where VDS(on) is the MOSFET on-state voltage drop.In addition, the MAX16956AUBB+ has a patented low-side over-current protection (LOCP) circuit, providing an additional layer of protection for the external power circuit.

Conclusion

The MAX16956AUBB+ DC/DC switching regulator is a high-performance device designed to efficiently convert a higher level of DC power source to a lower level one. It offers adjustable output current of up to 3A, allowing it to deliver sufficient power to cover high-power applications, such as powering motors and displays in automotive and wearable systems. The integrated I²C interface enables easy customization and control of the device for specific applications. The patented low-side over-current protection circuit provides an additional layer of safety for the external power circuit.

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