MAX797HESE+

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The MAX797HESE+ is a DC-DC Switching Controller from Maxim Integrated Products. It is classified under PMIC - Voltage Regulators - DC DC Switching Controllers. It is an advanced, current-mode, field-effect transistor (FET) switch controller specially designed to operate in step-up (boost), buck, and buck-boost applications. The advanced features make it a perfect device for high-performance, low-power systems.

The wide input voltage range of the MAX797HESE+ can cover most of the AC main input (8.5V-350V) used in systems such as industrial gate drivers, utility meters, and consumer appliance applications. The high ripple rejection capability provides protection for sensitive analog signals and digital devices. It also supports soft-start, pre-biased start-up, and synchronous rectification to reduce system power losses.

The MAX797HESE+ is designed to manage power over-currents, and it supports a high-side sense resistor for sensing the current over the load. This helps in prevention of overloading, which can lead to high system power losses and device damage. The high-side sense functionality can be used to sense the current over the output of the load, ensuring precise control and improved system performance.

The device offers low start-up current (20µA typ), low stand-by current (10µA typ), and high efficiency (up to 94%). The low start-up and stand-by current, together with the low quiescent current of the device, reduces system power losses and contributes to a high overall energy efficiency. The device has an accuracy of ±3%, and maximum internal current limit of 1.5A.

The MAX797HESE+ features a wide range of functions, such as built-in start-up and short-system protection, frequency control, and load regulation. The switching frequency can be adjusted between 100kHz and 600kHz, to minimize their noise and ripple. Additionally, the device can sense the current over the output of the load, providing accurate load regulation.

The device also has an accuracy of ±3%, and a low distortion of 4% at full load. Additionally, the MAX797HESE+ is designed to operate from a wide temperature range of -40°C to +125°C junction temperatures and is available in a 14-pin lead-free, plastic DIP package. All these features make the MAX797HESE+ an ideal choice for low-power systems.

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