Frequency - Switching:	150kHz, 300kHz
Base Part Number:	MAX797
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable, Pulse Skipping, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	96%
Series:	--
Voltage - Supply (Vcc/Vdd):	5 V ~ 30 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck, Boost, Flyback
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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MAX797ESE+T Application Field and Working Principle

Introduction

The MAX797ESE+T is an advanced DC/DC switching controller from Maxim Integrated that is designed for use with positive voltage regulators, as well as for application to negative voltage regulators for producing negative rails. The controller utilizes a technology called Current-Mode control which provides increased accuracy and system stability.The MAX797ESE+T is a versatile and widely used DC/DC switching controller. Its comprehensive feature set and robust performance make it a perfect solution for many power supply applications. The MAX797ESE+T also has a wide range of operation, ranging from single cell lithium-ion/Li-polymer battery charger/supply operation to a wide variety of high power and dual output systems.

Application Fields and Performance

The MAX797ESE+T is an ideal solution for many types of DC/DC switching applications. Its advanced current mode architecture, low quiescent current, high efficiency and accurate protection features make it the perfect choice for a wide range of power supplies, from small single cell lithium-ion/Li-polymer battery charger/supplies to high power applications such as multiple output DC/DC converters and desktop power supplies.The MAX797ESE+T offers excellent performance for single cell lithium-ion/Li-polymer battery charger/supplies. It\'s flexible programmability via external resistors and allows for quick adjustment of current and voltage limits, as well as temperature protection. This ensures reliable battery charging over a temperature range of -40°C to +85°C.The controller also has a wide range of current and voltage efficiency, allowing for a wide power output range. This makes it a suitable choice for many high power applications, such as multiple output applications, such as a dual-output 48V/12V supply, or a high power application, such as a 2kW 12V desktop computer power supply.

Working Principle

The MAX797ESE+T is a current-mode switching controller, meaning it uses a sensing circuit that monitors the load current to regulate the output voltage. This is achieved by using a current-indicating voltage output from the integrated sense resistor. The MAX797ESE+T uses a PWM (pulse-width modulated) control scheme, with the current mode architecture ensuring accuracy and stability. This ensures that the output voltage is regulated accurately, independent of load current variations.The MAX797ESE+T also features accurate protection features to ensure safe operation under any conditions. It can detect output overvoltage, undervoltage and overcurrent conditions, as well as thermal protection.

Conclusion

The MAX797ESE+T is a versatile and highly accurate DC/DC switching controller, ideal for a wide range of DC/DC switching applications. Its flexible programmability, wide range of operation, excellent performance and accurate protection features make it a perfect choice for single cell lithium-ion/Li-polymer battery charger/supplies, as well as high power and dual output systems. Its current-mode architecture ensures efficient and accurate operation, making it an essential component in any power supply system.

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