MAX17292ETCD+

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The MAX17292ETCD+ is a fully integrated synchronous buck dc-dc converter that operates from a 3V to 22V input voltage range and provides up to 5A continuous output current. It is part of the MAX17292 family of solutions from Maxim Integrated. As such, it can power a variety of devices, from intermediate bus voltage nodes in ASIC/ASSPs to portable devices such as smartphones and tablets. The MAX17292ETCD+ belongs to the category of PMIC (Power Management ICs) Voltage Regulators and more specifically, DC-DC Switching Regulators. In this article, we will discuss the application field of the MAX17292ETCD+ and its working principle.

Application Field of MAX17292ETCD+

The MAX17292ETCD+ is designed to convert the input voltage from a wide range (3V to 22V) and provide up to 5A continuous output current. This makes it ideal for a variety of applications where a wide input voltage range is needed to power the device such as in ASIC/ASSPs. It can also be used in portable devices such as smartphones and tablets as well as for providing intermediate bus voltage. Additionally, the adjustable switching frequency allows for configurable power results based on the output current required. It also features other features such as short-circuit protection and power good output, making this IC an attractive option for many applications.

Working Principle of MAX17292ETCD+

The MAX17292ETDC+ is a synchronous buck DC-DC converter that uses a non-inverting buck controller and high-side and low-side MOSFETs. The switching controller provides cycle-by-cycle current monitoring feature to regulate the output current. It switches a high-side MOSFET and a low-side MOSFET in synchronous manner to generate the desired output voltage. The adjustable switching frequency, current mode control with low noise, and the inherent protections against overcurrent, open-loop operation, output-undervoltage and overvoltage, make this device an attractive option for various applications.

The input voltage is supplied to the high-side MOSFET’s gate and the output voltage is connected to the drain of the low-side MOSFET. As the MOSFETs switch between on and off, the input voltage is converted to the desired output voltage. The current mode control feature regulates the output current by monitoring the inductor current. The inductor current is then compared to the reference voltage which creates the error signal. This error signal is then compared to the voltage at the non-inverting input of the error amplifier. If the non-inverting input is higher than the inverting input, the error amplifier output (FB) voltage is increased. If the non-inverting input is lower than the inverting input, the error amplifier output (FB) voltage is decreased.

The pulse-width modulation (PWM) controller controls the on/off time of high-side and low-side MOSFETs to regulate the output voltage. The on-time of high-side MOSFET is regulated by the FB voltage, which provides the current mode control of the output current. The off time is automatically adjusted based on the input voltage. This feature reduces the peak current and improves the efficiency of the converter. Additionally, the MAX17292ETDC+ also features frequency synchronization circuit which allows the system to operate at synchronous frequency from a 1MHz to 2MHz range.

Conclusion

The MAX17292ETCD+ is a powerful dc-dc converter operating from a 3V to 22V input voltage range and providing up to 5A continuous output current. It is part of the PMIC (Power Management ICs) Voltage Regulators and more specifically, DC-DC Switching Regulators. This converter is designed to be used in applications where a wide input voltage range is needed such as in ASIC/ASSPs and in portable devices such as smartphones and tablets. The MAX17292ETDC+ features a non-inverting buck controller and adjustable switching frequency, current mode control with low noise, and the inherent protections against overcurrent, open-loop operation, output-undervoltage and overvoltage. These features make this device an attractive option for many applications.

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