MAX1845EEI

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PMIC - Voltage Regulators - DC DC Switching Controllers

The MAX1845EEI is a high efficiency, integrated, 20V step-up converter for mobile applications. It is designed to provide power to applications where space and efficiency are of primary importance. The device is well suited for use in battery powered applications where its low operating voltage of 2.2V-5.5V, while still providing a regulated output up to 20V, makes it a good fit for both low-power and moderate power supplies. The integrated MOSFET further reduces overall system cost.

Features

• Output Voltage Range: 2.2V-20V
• Output Current: 1A
• Efficiency: Up to 85%
• Integrated MOSFET
• Integrated Current Limiting Produces Constant Output Current
• Integrated Overvoltage and Thermal Protection
• Low Operating Voltage: 2.2V-5.5V
• Small 4mm × 5mm package

Applications

• Cell Phones, PDAs, and MP3 Players
• Video Cameras, Digital Cameras, and Camcorders
• Portable Instruments and other Handheld Electronic Devices

Working Principle

The MAX1845EEI utilizes a low on-resistor synchronous PWM architecture to ensure high efficiency, and runs at a fixed frequency up to 1.8MHz, allowing for small component size and easy design-in. The unique auto-switching frequency versus inductor size feature within the device ensures easy selection, and does not require induction of the switching frequency.The synchronous MOSFET switch within the device, allows the device to be operated at low voltage up to 2.2V while still providing the same amount of output power. Integrated thermal shut down and over current protection further enhance the overall operation of the device.

The MAX1845EEI is designed with a buck/boost architecture, which allows the device to be used as either a step-up or step-down converter. This feature also allows the MAX1845EEI to provide a regulated 5V output regardless of input voltage. Unlike other solutions that require level shifting, the buck/boost feature ensures a low voltage dropout and low output noise.

The MAX1845EEI also features a programmable current limit, which allows the system to be customized for different output loads. This feature lets the user adjust the amount of current without having to make any changes in the design of the system. The unique current limit feature also allows for the use of smaller components, reducing system cost and size.

Conclusion

The MAX1845EEI is a simple, integrated step-up converter ideal for mobile applications. It is designed to provide power to applications where space and efficiency are of primary importance. Its low operating voltage of 2.2V-5.5V and its integrated MOSFET make it well suited for use in battery powered applications. The device also features a programmable current limit, allowing the user to customize the output for different loads. With its high efficiency and small package size, the MAX1845EEI is an ideal solution for a variety of applications.

The specific data is subject to PDF, and the above content is for reference