LT8315EFE#PBF

Voltage - Output (Min/Fixed):	--
Base Part Number:	LT8315
Supplier Device Package:	20-TSSOP-EP
Package / Case:	20-TSSOP (0.173", 4.40mm Width), 16 Leads, Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	220Hz ~ 140kHz
Current - Output:	800mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	560V
Voltage - Input (Min):	18V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Flyback
Output Configuration:	Positive, Isolation Capable
Function:	Step-Down, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tube

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LT8315EFE#PBF - PMIC - Voltage Regulators - DC DC Switching Regulators

The LT8315EFE#PBF is an advanced single-stage synchronous buck regulator monolithic IC, which is designed for the DC-DC step-down ultimate regulation of intermediate bus voltage with high power efficiency and stringent transient and acoustic noise specifications. It integrates an 800V MOSFET, a high resolution current sense amplifier, a feedback voltage reference and a closed-loop error amplifier in a single package.The LT8315EFE#PBF switching regulator features a 3-phase interleaved DCM (Discontinuous Conduction Mode) architecture to provide excellent system-level efficiency and exceptional transient response. It is capable of providing up to 12A continuous output current, and can operate up to 25A pulse loads.With the built-in current sense amplifier and the adjustable current limit and overcurrent protection, the LT8315EFE#PBF provides a safe, efficient, and quiet operation at the highest levels of power conversion efficiency. Additionally, the switching frequency and slope compensation can be adjusted with external components to optimize system performance and reduce EMI.

Application Field

The LT8315EFE#PBF is widely used for the following applications:- Computers, hard disk drives, LCD displays, and set-top boxes- Home/office communication equipment- Battery powered portable equipment- Industrial supplies and motor/lighting control- Automotive and telecommunication systems

Working Principle

The LT8315EFE#PBF uses DCM interleaved switching mode to provide up to 12A continuous output current. The device utilizes an 800V MOSFET with high current carrying capabilities and excellent thermal characteristics.The LT8315EFE#PBF synchronizes to a wide range of different switching frequencies up to 1MHz and with adjustable slope compensation, the user can further adjust the device to reduce differential mode EMI. The current sense amplifier is typically set with an external resistor, and the operating current limit is adjustable from 2A to 25A.The constant voltage mode regulation is achieved by a voltage reference, while the slope compensation is enabled by an external capacitor. Additionally, the LT8315EFE#PBF provides a voltage trim function with an integrated Trim pin that allows the user to externally adjust the output voltage with great accuracy.The LT8315EFE#PBF also features a thermal shutdown where the protection circuitry protects the device from becoming too hot. This can be used to maintain the temperature of the device to safe levels and ensure its reliability.In conclusion, the LT8315EFE#PBF is a highly advanced single-stage synchronous buck regulator monolithic IC that provides an excellent system-level efficiency and exceptional transient response, making it an ideal solution for the industrial and automotive markets.

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