LT8640IUDC#PBF

Voltage - Output (Min/Fixed):	0.97V
Base Part Number:	LT8640
Supplier Device Package:	20-QFN (3x4)
Package / Case:	20-WFQFN, 18 Leads, Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	210kHz ~ 2MHz
Current - Output:	5A
Voltage - Output (Max):	42V
Series:	--
Voltage - Input (Max):	42V
Voltage - Input (Min):	3.4V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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LT8640IUDC#PBF

Application Field
The LT8640IUDC#PBF is a monolithic, high-efficiency, synchronous buck switching regulator which combines integrated power switches and provides 180° out-of-phase control to minimize input ripple current requirements and minimize switching losses as compared to non-inverting synchronous configurations. With high-side and low-side FETs integrated on-chip, the device eliminates the need for external Schottky diode or synchronous rectifiers, reducing external components and lowering power dissipation. It supports wide input voltage ranges between 4V and 36V and a maximum output current of 7A.The LT8640IUDC#PBF is ideal for applications such as radio communications, base station and distributed power systems, computing and server equipment, industrial, automotive, and battery powered systems.Working Principle
The LT8640IUDC#PBF works by regulating an input voltage to an output voltage, while supplying a load with the set output voltage. The device follows an adaptive switching frequency that varies between 300KHz and 2MHz, and achieves step-down conversion ratios between 78% and 89% over a wide range of temperatures and load conditions. By utilizing its integrated high-side and low-side power MOSFETs, the LT8640IUDC#PBF efficiently regulates the output voltage and reduces the losses due to switching and conduction. The device can also be configured for single-ended or dual-ended operation, and dual-ended operation yields a greatly reduced board footprint.Additionally, the device is equipped with several protection features, including under-voltage lockout, over-voltage protection, over-current protection and thermal shutdown protection. This allows for a safe and reliable operation even in harsh environments.Conclusion
The LT8640IUDC#PBF is a high-efficiency, integrated monolithic synchronous buck switching regulator designed to withstand wide input voltage ranges and provide an output current of up to 7A. The device follows an adaptive switching frequency between 300KHz and 2MHz and operates between 78% and 89% efficiency. The device also features integrated high-side and low-side power MOSFETsw, eliminating the need for external Schottky diodes or synchronous rectifiers and reducing external components and power dissipation. The device can be used in a wide range of applications, and is equipped with protection features for safe and reliable operation even in extreme conditions.

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