MAX8685CETA+

Series:	--
Packaging:	Tube
Part Status:	Active
Applications:	Photoflash Capacitor Charger
Current - Supply:	--
Voltage - Supply:	--
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	8-WDFN Exposed Pad
Supplier Device Package:	8-TDFN-EP (3x3)
Base Part Number:	MAX8685

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Introduction

The MAX8685CETA+ is an advanced power management integrated circuit from Maxim Integrated that provides power supply design flexibility and improved system performance in a variety of applications. The MAX8685CETA+ is suitable for space constrained smart phones and other portable devices such as tablets, netbooks, and ultra-compact form-factor notebooks. It integrates a number of power management features including a DC/DC switching converter, a power path controller, voltage monitoring, and many other features. This article will cover the application field and working principle of the MAX8685CETA+.

Application Fields

The MAX8685CETA+ is designed to reduce the complexity and bill-of-materials (BOM) cost of designing power systems in applications where board space and weight are limited. Applications include but are not limited to mobile phones, personal media players, and PDAs. It is also well suited for tablet PCs, ultra-thin notebooks, and other portable electronics.

Features

The MAX8685CETA+ offers an integrated solution to multiple power management needs that are demanded by portable applications today. It integrates a 3.3V to 5V DC/DC switching converter, a power path controller, voltage monitoring and control, a power FET, and other features.The integrated DC/DC switching converter can operate from an input voltage of 3.3V to 5V, and can provide an output voltage of up to 5V with a current limit of up to 2A. The power path controller allows the system to seamless transition between the battery and external power sources while limiting input current. The internal power FET provides reverse load protection, output current sense, and auto-shutdown if a fault is detected.The MAX8685CETA+ features a programmable output voltage, allowing the designer to adjust it to a particular desired voltage (up to 5V). It also features adjustable current limit and energy-saving features, as well as an on-board monitoring system to protect against output overcurrent and short-circuit conditions. The MAX8685CETA+ is designed to have a low quiescent current, which makes it ideal for low-power systems.

Working Principle

The MAX8685CETA+ works by first enabling the 3.3V-5V power switch that provides power to the system. The power switch is then monitored by an internal current-sense circuit and a voltage monitoring circuit. The voltage monitoring circuit controls the output voltage by providing a feedback signal to the power switch.The power path controller allows the system to transition from using the battery to an external power source and vice versa. When a higher voltage power source is detected, the power path controller will disconnect the battery and provide power to the system. The MAX8685CETA+ also features overcurrent and short-circuit protection, and an adjustable current limit to protect the system from overcurrent and short-circuit conditions. Overall, the MAX8685CETA+ provides a cost-effective solution for powering low-power portable devices such as phones, players, and PDAs by providing efficient power supply design, improved system performance, and additional features such as on-board fault detection and protection.

Conclusion

The MAX8685CETA+ is an integrated power management solution from Maxim Integrated, suitable for applications where board space and bill-of-materials cost need to be kept to a minimum. It can provide power to the system from an input voltage ranging from 3.3V to 5V, and can also transition from using a battery to an external power source. In addition, it offers adjustable current limit and energy-saving features, as well as overcurrent and short-circuit protection, making it ideal for low-power systems.

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