LT8697IUDD#PBF

Series:	--
Packaging:	Tube
Part Status:	Active
Applications:	Converter, USB
Voltage - Input:	5 V ~ 42 V
Number of Outputs:	1
Voltage - Output:	5 V ~ 5.25 V
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	24-WFQFN Exposed Pad
Supplier Device Package:	24-QFN (3x5)
Base Part Number:	LT8697

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Introduction to LT8697IUDD#PBFThe LT8697IUDD#PBF is a special purpose voltage regulator integrated circuit (IC) from Linear Technology (LT). It is part of the LT portfolio of Power Management ICs (PMICs). The device is a high frequency synchronous buck regulator with integrated high and low side MOSFETs. Its accurate current limit, cycle-by-cycle peak current limit and synchronous rectification provide smooth load transients for improved transient response and high efficiency.Application Fields The LT8697IUDD#PBF can be used in a wide range of application fields including notebooks, aerospace, medical, energy storage, and power line communications, etc.The device is specifically designed for notebook power supplies, where accurate current limiting and fast response time are required. Its high efficiency allows its output voltage to be accurately maintained while providing power to the load at very low output current levels. Its synchronous rectification eliminates reverse current flow, improving the overall power efficiency.The device is also well suited for use in energy storage devices, where its high efficiency enables it to accurately maintain the output voltage when operating at very low output current levels. Its quick transient response allows the device to efficiently handle current draw spikes.The device is also suitable for use in aerospace, medical and power line communication applications where its low output noise, accurate current limiting and cycle-by-cycle peak current limit reduce the risk of damaging sensitive components.Working PrincipleThe LT8697IUDD#PBF works based on the buck regulator principle. It takes an input voltagehigher than the output voltage to regulate the output voltage and current to the required levels.The circuit is made up of a few components including an input capacitor, an inductor, two transistors (high-side & low-side), two switching diodes, an output capacitor and an output voltage regulator.The output voltage regulator monitors the output voltage, compares it with the reference value, and then adjusts the switching duty cycle of the two transistors (high-side & low-side) to regulate the output voltage.The input capacitor and the output capacitor filter out ripple current, while the inductor and the two switching diodes create a resonant circuit that increases the voltage step-down ratio of the converter.The LT8697IUDD#PBF is a synchronous buck regulator, which means that the high-side and low-side transistors switch at the same time. This results in lower power loss, improved efficiency and faster transient response.ConclusionThe LT8697IUDD#PBF is a high frequency synchronous buck regulator IC designed for use in notebooks, aerospace, medical, energy storage, and power line communication applications. It features accurate current limit, cycle-by-cycle peak current limit, synchronous rectification and low-noise operation. Its high efficiency and fast transient response make it a suitable choice for a wide range of applications. Its buck regulator working principle ensures accurate output voltage and current regulation with minimal power loss.

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