LT3992EFE#PBF

Voltage - Output (Min/Fixed):	0.8V
Base Part Number:	LT3992
Supplier Device Package:	38-TSSOP-EP
Package / Case:	38-TFSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	110kHz ~ 2.5MHz
Current - Output:	3A
Voltage - Output (Max):	57V
Series:	--
Voltage - Input (Max):	60V
Voltage - Input (Min):	3V
Number of Outputs:	2
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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PMIC - Voltage Regulators - DC DC Switching RegulatorsLT3992EFE#PBF is an synchronous buck regulator from the DC-DC switching regulators family from Linear Technology. It operates from an input voltage range of 4.5V to 45V and is capable of providing an adjustable output voltage of 0.8V which is capable of delivering a maximum output current of 5A. The LT3992 features a wide range of features such as soft-start and current limit, frequency synchronization and low shutdown currents which make it suitable for a variety of applications. Overview The LT3992EFE#PBF is a monolithic synchronous buck regulator controller. It operates over a 4.5V to 45V input voltage range and is capable of providing an adjustable output voltage of 0.8V to VIN, with a maximum output current of 5A. The LT3992 features high efficiency and an improved transient response, making it an ideal choice for powering high current applications. The device also features a wide range of features such as a current limit and soft-start functionality, frequency synchronization, low shutdown currents and a wide operating temperature range.Features The LT3992EFE#PBF offers a wide range of features that make it suitable for a variety of applications. These features include: • 4.5V to 45V input voltage range• Output voltage adjustable from 0.8V to VIN• Input undervoltage lockout• Output overvoltage protection• Frequency synchronization• Soft-start• Current limit• Low shutdown currents• High efficiency• Improved transient response • Wide operating temperature rangeApplicationsDue to its wide range of features and its wide operating temperature range, the LT3992EFE#PBF is suitable for a variety of applications, such as:• High current power supplies• DC/DC converters• Telecommunications equipment• Speaker, audio and video amplifiers• Industrial control equipment• Battery charging applications • Computer and peripheral equipment• Automotive systems• Automated test equipmentWorking PrincipleThe LT3992EFE#PBF is a synchronous buck regulator, which means that it uses two power switches and an inductor to transfer energy from the input voltage source to the load. This is done by switching the power switches on and off at a predetermined frequency, while the current flowing through the inductor and the load is determined by the duty cycle of the power switches. When the power switch is on, the current in the inductor increases and builds up a magnetic field, while when the power switch is off, the current in the inductor decreases and the magnetic field is dissipated. This process is repeated over and over, creating an alternating current that is in phase with the power switches, thus providing the output voltage to the load.The LT3992EFE#PBF also features current limit and soft-start functionality, allowing the user to set the desired limit as well as delay the start-up of the buck regulator to avoid inrush current. The LT3992 also features frequency synchronization, which allows the user to synchronize the output frequency of the buck regulator with the input frequency of the application, thus improving efficiency and reducing EMI. Lastly, the device features low shutdown current consumption and a wide operating temperature range, making it suitable for applications in high temperature environments.

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