LT3837IFE#PBF

Frequency - Switching:	100kHz
Base Part Number:	LT3837
Supplier Device Package:	16-TSSOP-EP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Frequency Control, On Time Control
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	88%
Series:	--
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 20 V
Output Phases:	1
Number of Outputs:	1
Topology:	Flyback
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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Introduction

The LT3837IFE#PBF is a high-performance DC-DC switching controller designed for applications such as point-of-load power supplies, step-up, and buck-boost converters. Its wide 4V to 75V input voltage range and wide output voltage range of up to 75V makes it suitable for a variety of different applications. With its high switching frequency of up to 500 kHz and low maximum duty cycle of 12.5%, it can achieve excellent efficiency over a wide range of voltages and loads. The LT3837IFE#PBF also includes several safety and protection features, including adjustable overvoltage, adjustable overcurrent and thermal shutdown, making it a very reliable and versatile switching controller for a variety of applications.

Application Field

The LT3837IFE#PBF can be used in a variety of different applications, including point-of-load power supplies, step-up, and buck-boost converters. It is well-suited for use in a variety of automotive and industrial applications, including 9V to 60V telecom systems, distributed power supplies, battery charging, motor supplies, and solar-powered systems. It is also suitable for a variety of other applications, such as white goods, solar systems, and battery chargers.

Working Principle

The LT3837IFE#PBF works by taking in a wide 4V to 75V input voltage range, and regulating that input into a desired output voltage. The LT3837IFE#PBF can achieve this by using a switch-mode architecture, in which an inductor is used to store energy during switching and then release that energy to the load when the switch is open. It is this storing and releasing of energy that allows for efficient power conversion.In addition, the switch-mode architecture allows for the use of a constant frequency oscillator, which improves overall control of the output power. The LT3837IFE#PBF also includes adjustable timers for protection against overvoltage, overcurrent, and thermal shutdown, as well as adjustable fault protection for enhanced system reliability.

Conclusion

The LT3837IFE#PBF is an excellent choice for a wide range of applications, from point-of-load power supplies to step-up and buck-boost converters. Its wide 4V to 75V input voltage range and wide output voltage range of up to 75V make it suitable for a variety of different applications. Its high switching frequency of up to 500 kHz and low duty cycle of 12.5% allow for excellent efficiency over a wide range of voltages and loads. Furthermore, its adjustable timers and fault protection features make it a very reliable and versatile switching controller for a variety of applications.

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