LT1765EFE-3.3#PBF

Voltage - Output (Min/Fixed):	3.3V
Base Part Number:	LT1765
Supplier Device Package:	16-TSSOP-EP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	1.25MHz
Current - Output:	3A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	25V
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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LT1765EFE-3.3#PBF Application Field and Working PrincipleLT1765EFE-3.3#PBF is a high-performance synchronous step-down switching regulator designed to operate with advanced on-time control architecture. It has a wide range of operating voltage and is suitable for microprocessor core power, FPGA core power, remote sensing, RF power amplifying, and wireless communications applications. This paper focuses on the application field and working principle of the LT1765EFE-3.3#PBF.Application Field of the LT1765EFE-3.3#PBFThe LT1765EFE-3.3#PBF is an advanced switching regulator designed to deliver up to 3.5A of continuous output current with 4V to 32V input voltage range. It also can provide a low-dropout, low-noise, high efficiency and fast transient response. Its flexibility is designed to offer the ideal solution for a diverse range of requirements. The LT1765EFE-3.3#PBF\'s wide range of operating voltage makes it suitable for a wide range of applications. Its low-noise, high efficiency and fast transient response makes it the perfect choice for microprocessor core power and FPGA core power. The LT1765EFE-3.3#PBF\'s wide operating voltage range and high current capability makes it well suited for remote sensing, RF power amplifying, and wireless communications applications. The LT1765EFE-3.3#PBF is available in compact SOT-23 and thermally enhanced TSOT-23 packages. The package size and thermal characteristics are optimized for space- and thermal-constrained applications and provides reliable and predictable performance in mission-critical applications. Working Principle of the LT1765EFE-3.3#PBFThe LT1765EFE-3.3#PBF is a step-down switching regulator that uses an advanced on-time control architecture. The LT1765EFE-3.3#PBF works by sequencing the output switch, which turns ON and OFF at a frequency determined by the on-time control circuit. The output switch remains ON until the inductor current reaches a maximum value determined by the on-time. At this point, the output switch turns off and the switch current quickly decreases to zero. A current-limit protection circuit then monitors the output current and limits it to a maximum value set by an external resistor. When the current-limit value is reached, the output switch will not turn ON again until the inductor current has decreased to below the current-limit value. This ensures that the output current will never exceed the current-limit. The LT1765EFE-3.3#PBF also has an adjustable output voltage from 0.75V to 0.95 times the input voltage. The output voltage can be adjusted using an external resistor divider. The output can also be synchronized to an external frequency. In order to further improve the system performance, the LT1765EFE-3.3#PBF also offers several advanced features such as a power-saving Burst Mode operation and a soft-start functionality.ConclusionThe LT1765EFE-3.3#PBF is a high-performance synchronous step-down switching regulator designed to offer an optimal solution for a wide variety of applications. It has a wide range of operating voltage and is suitable for microprocessor core power, FPGA core power, remote sensing, RF power amplifying, and wireless communications applications. The LT1765EFE-3.3#PBF works by sequencing the output switch and a current-limit protection circuit to ensure that the output current never exceeds the maximum value set by an external resistor. The LT1765EFE-3.3#PBF also offers advanced features such as a power-saving Burst Mode operation and a soft-start functionality to further improve system performance.

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