MAX17690ATE+

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MAX17690ATE+ is a high performance, synchronous, DC-to-DC switching controller with a high power, low RDSON output stage. This device can operated in the buck, boost, buck-boost and important inverting operating modes, which make it well suited for a wide range of applications. It features a wide input voltage range of 2.4V - 12V, which is perfect for a range of mobile and consumer applications.

Features

• Integrated power feedback and core power components.
• Output current limits of up to 20A with 300mV VDSS.
• Enables up to 95% power efficiency.
• Programmable phase-lockable fixed frequency operation.
• Spread spectrum frequency modulation.
• Precision current sensing.
• Configurable automatic output voltage tracking.
• Built-in decay mode boost diode.
• Built-in soft-start with user adjustable delay.
• Push-button shutdown function.
• APT3020 power MOSFET pre-driver.

Applications

• Battery-powered applications.
• 5V and 12V output applications.
• Embedded applications.
• Envelope tracking and power amplifier sourcing.
• High efficiency motherboard VR.
• Portable battery chargers.
• Low power buck converters.
• DC/DC applications in automotive and IoT applications.

Inverter Applications

The buck, boost, buck-boost and important inverting operating modes of the MAX17690ATE+ make it ideal for inverter applications. An inverter is a device that takes an input voltage and converts it to an output AC voltage with different frequency and/or level. Inverters are usually used to power AC loads from DC power sources, such as batteries or solar energy, and are widely used in a variety of applications for both industrial and home use. Inverter applications can use the integrated feedback, core power components and full bridge driver provided by the MAX17690ATE+. This makes it easy to implement wide range of efficient, power conversion systems.

Working Principle

The MAX17690ATE+ controller operates by synchronizing the on-time and off-time of the power MOSFETs to achieve the desired output voltage. Before switching on, the current at the R sense pin is evaluated to determine the load current. In Buck mode, the controller monitors the output voltage at the FB pin and adjusts the on-time to maintain the output voltage at the target value. In Boost mode, the controller monitors the input voltage and adjusts the off-time of the power MOSFETs to maintain the output voltage at the target value. In Buck-Boost mode, the controller switches from Buck mode to Boost mode, depending on the input and output voltages, to regulate the output voltage. In Inverting mode, the controller switches the power MOSFETs at a fixed frequency, to generate an inverted copy of the input voltage.

Conclusion

The MAX17690ATE+ is a high performance, synchronous, DC-to-DC switching controller with a high power, low RDSON output stage. It features a wide input voltage range, enabling up to 95% power efficiency, programmable phase-lockable fixed frequency operation, spread spectrum frequency modulation and more. This makes it perfect for a wide range of applications such as battery-powered applications, embedded applications, envelope tracking and power amplifier sourcing, high efficiency motherboard VR and more. It is also ideal for inverter applications, which can take advantage of the integrated feedback, core power components and full bridge driver.

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