LT3690HUFE#TRPBF

Voltage - Output (Min/Fixed):	0.8V
Base Part Number:	LT3690
Supplier Device Package:	26-QFN (4x6)
Package / Case:	26-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	138kHz ~ 1.5MHz
Current - Output:	4A
Voltage - Output (Max):	20V
Series:	--
Voltage - Input (Max):	36V
Voltage - Input (Min):	3.9V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Overview

The LT3690HUFE#TRPBF is a step-up/step-down switching regulator suitable for power supply design applications. It provides a compact, yet versatile solution for a wide variety of tasks. This device integrates a high-efficiency synchronous switching regulator as well as a low dropout linear regulator, allowing it to operate as either a step-up, step-down or a combination of both. It has a wide 4.5V to 17V operating voltage range and can support up to 3.5A of current while delivering up to 95% efficiency. It is designed to operate using the most advanced topology to deliver the tightest transient response, highest peak efficiency and minimum noise output.

Application field

The LT3690HUFE#TRPBF is an excellent choice for any device or application that requires precise control of power output. It is commonly used in portable electronic devices, such as laptops and cell phones, due to its low power consumption and wide input voltage range. Additionally, it is suitable for any automotive or industrial applications that require a small, efficient and low voltage supply. Some of the specific applications where the LT3690HUFE#TRPBF can be used for include:

• Portable electronics, such as laptops and cell phones
• Automotive and industrial electronics, such as solar energy systems
• Medical devices, such as heart rate monitors and blood pressure monitors
• Communication and consumer electronics, such as monitors and TVs
• Portable audio systems, such as MP3 players and portable speakers
• Testing and measurement equipment, such as oscilloscopes and power analyzers

Working principle

The LT3690HUFE#TRPBF is a boost, buck, or buck-boost topology, depending on input and output voltages. It can be used to generate output voltages higher, lower, or equal to the input voltage. When operating in boost mode, the LT3690HUFE#TRPBF draws current from the input voltage source, steps up the voltage, and then passes it to the output. If the output voltage is lower than the input voltage, the device operates in buck mode, drawing power from the output, stepping down the voltage, and passing the reduced voltage to the input. This regulation is achieved through pulse-width modulation (PWM) control, with the frequency of the switching dependant on the input voltage. The PWM is optimized for maximum efficiency, to minimize power consumption and increase efficiency.The LT3690HUFE#TRPBF is also capable of automatically entering a low-power sleep mode when no load is detected. This feature helps to minimize current consumption and improve battery life. Other features of this device include power-good and power-fail detection logic, as well as thermal protection.

Conclusion

The LT3690HUFE#TRPBF is an ideal solution for a wide variety of applications that require precise control of power output. Its combination of low power consumption and high efficiency makes it an excellent choice for portable electronic devices, automotive and industrial electronics, medical devices, communication and consumer electronics, portable audio systems, and testing and measurement equipment. Its versatile switching topology enables it to support both step-up and step-down operations, while its low current sleep mode helps to extend battery life. It is designed to offer the tightest transient response, highest peak efficiency and least noise output.

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