MAX40200AUK+

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MAX40200AUK+ is a low quiescent current, 2MHz Step-Down DC-DC µModule® that serves as power management integrated circuit (PMIC). It is ideal for applications such as medical, industrial and consumer. With high efficiency, low shutdown current and low quiescent current it is suitable for battery-operated applications. The MAX40200AUK+ come with an internal synchronous HMSO, integrated inductor and a choice of power switches. It eliminates the need for external components and provides high-efficiency operation with 10-A Peak load. By adopting a unique symmetrical current-sharing architecture, it can also operate in parallel with an additional external switch.

The MAX40200AUK+ is an OR controller, ideal diode and voltage regulator in one package. It is protected against transistor and diode overheats, undervoltage and overvoltage locks, and manual reset command. Utilizing the PWM control structure, the MAX40200AUK+ provide valuable features such as wide input voltage range, power-optimized operation, low quiescent current and a low junction-temperature shutdown operation.

The working principle of the MAX40200AUK+ is a two-stage combined OR controller and ideal diode regulation. It starts from the OR control loop which is composed of an internal OR controller, an ideal diode, a power switch, and an output voltage sense voltage. The OR controller act as the prime regulator of the system, regulating the output voltage without compromising the efficiency. At the same time, an ideal diode controlled by an internal OR maintain an acceptable voltage drop across the output power switch during conduction.

The OR controller sets the output voltage by comparing an internal reference voltage and the output sense voltage, adjusting the duty cycle of the power switch to keep the output voltage at the desired value. To prevent short circuit of the power switch, the ideal diode is provided to maintain an acceptable voltage drop across the power switch during conduction. During shutdown, ideal diode is turned off, so that any current flowing into the output is cut off and the system is reset.

For additional safety, the MAX40200AUK+ has a dual-mode voltage lock-out and a manual reset command. When the input voltage falls below the undervoltage lock-out threshold, the device is shut down and the output remains disabled. When the input voltage rises above the overvoltage lock-out threshold, the device is also disabled and the output remains off.

The MAX40200AUK+ also includes an integrated inductor and a choice of power switches to give an efficient performance. The internal synchronous FET makes it possible to operate with very high efficiency in a wide input voltage range. The high-speed internal digital control loop switching, trickle features and multi-level current regulation provide excellent transient and light load performance. With the wide input voltage range and power optimization, the MAX40200AUK+ can keep the input current under a specific current limit for a given load current.

In conclusion, the MAX40200AUK+ is a high-efficiency and low quiescent current PMIC, ideal for battery-operated applications. With its two-stage regulation, wide input voltage range and power optimization algorithm, it provides excellent performance and excellent light-load efficiency. Additionally, its integrated synchronous FET, integrated inductor, output voltage sensing and dual-mode voltage lock-out make it an ideal choice for applications requiring a low-power and high-efficiency power management solution.

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