MC33470DW

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The MC33470DW is a highly integrated system-level power-management integrated circuit (PMIC) for use in battery-powered devices. It integrates all of the necessary functions for a complete, battery-powered system including: microprocessor voltage regulation and power sequencing, a switch-mode buck converter, a low-dropout regulator, an LDO controller, an analog watchdog, a battery monitor, and other auxiliary features.

The MC33470DW is a special purpose voltage regulator. It is an integrated circuit (IC) intended to sense, control, and regulate the input voltage applied to a specific battery-powered device in order to maintain a constant voltage to the device’s electronic components. It can be used to regulate both high and low voltages, ensuring that the device is supplied with the correct amount of power.

The MC33470DW\'s system-level integration provides the user with a complete power-management solution out-of-the-box. Optimized for ultra-low power, the MC33470DW operates with a wide input voltage range, from 4.0 V to 40 V. It can be programmed to provide a regulated voltage output from 0.9 V to 3.3 V, making it ideal for battery-powered devices. For improved efficiency, the integrated buck converter can be enabled with a minimum of 0.9 V output voltage, and can provide an output current up to 1.5 A.

The MC33470DW utilizes a proprietary buck converter topology to efficiently control voltage output, while the integrated LDO controller enables a low-power buck mode automatically when the output voltage exceeds the maximum LDO output voltage. Additionally, the device features an adjustable power-control clock, allowing for integration of the clock into the device\'s power-saving sequence. The clock rate can be set from 0.1 Hz to 16 kHz to ensure that the converter frequency is optimized for the specific application\'s power requirements.

The MC33470DW\'s power-saving feature set extends beyond voltage regulation. An integrated voltage monitor can be used to transition the system between active and sleep modes, allowing it to minimize current consumption when idle or on standby. The integrated low-current LDO controller also enables devices to enter into a low-power/sleep mode, reducing quiescent current by up to 75%.

The device provides a variety of protection features that allow the user to maintain safe operating conditions during device operation. These include overvoltage protection (OVP) with hysteresis and undervoltage protection (UVP). To ensure safe and reliable operation, the MC33470DW also monitors for over-temperature conditions and has an integrated analog watchdog which monitors for abnormal reaction to input voltage changes.

The MC33470DW is designed to provide a comprehensive solution for battery-powered applications, offering a combination of efficient power-conversion and system-level integration with a variety of protection features. With its wide input voltage range and adjustable output voltage, the MC33470DW is an ideal choice for products requiring reliable and efficient power management in a small form factor.

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