Maxim Integrated MAX1724EZK50 Step-Up DC-DC Converter

The MAX1724EZK50 from Maxim Integrated is a high-efficiency, low quiescent-current step-up DC-DC converter that is ideal for battery-powered devices. This compact and powerful component is designed to provide a fixed 5V output voltage from an input voltage as low as 0.7V, making it perfect for applications where the power source has a limited voltage range, such as single-cell AA or AAA batteries.

One of the standout features of the MAX1724EZK50 is its ability to maintain a high efficiency across a wide range of loads. This is achieved through its unique control scheme, which allows the device to automatically switch between a pulse-frequency modulation (PFM) mode at light loads and a pulse-width modulation (PWM) mode at higher loads. This ensures that the converter operates with optimal efficiency, thereby extending battery life in portable devices.

The MAX1724EZK50 comes in a compact SOT-23 package, making it suitable for space-constrained applications. Despite its small size, it offers a robust set of features, including a low 17µA quiescent current that further enhances its suitability for battery-powered applications where power conservation is crucial.

Additionally, the device includes an internal synchronous rectifier, which eliminates the need for an external Schottky diode and helps to reduce the overall component count and system cost. The MAX1724EZK50 also features a shutdown mode that reduces the quiescent current to just 0.1µA, contributing to the preservation of battery life when the device is not in active use.

With its wide input voltage range, fixed 5V output, and ability to deliver up to 200mA of load current (depending on input voltage and external components), the MAX1724EZK50 is a versatile solution for a variety of portable electronic devices, such as handheld medical equipment, personal care products, and wireless sensors.

Overall, the MAX1724EZK50 is a reliable and efficient choice for designers looking to maximize battery life while minimizing space and cost in their power management designs.