LT8390AIUFD#TRPBF

Frequency - Switching:	645kHz ~ 2.1MHz
Base Part Number:	LT8390
Supplier Device Package:	28-QFN (4x5)
Package / Case:	28-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Current Limit, Frequency Control, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	95%
Series:	--
Voltage - Supply (Vcc/Vdd):	4 V ~ 60 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck-Boost
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LT8390AIUFD#TRPBF Application Field and Working PrincipleDC-DC switching controllers are chips that are used to provide a stable DC power supply from an unregulated AC or DC signal. The LT8390AIUFD#TRPBF is a switched-mode DC-DC controller designed to provide convenient and accurate system power conversion. Application FieldThe LT8390AIUFD#TRPBF is designed to address a wide range of industrial applications, such as solar power converters, robotics, telecommunication systems, computer and server power systems, medical instrumentation, battery charging systems, and power distribution.The product offers an easy-to-use solution for custom power supply design and provides high efficiency, low cost, and high performance. This makes it ideal for applications that require high power density, low switching noise, and low-profile factor.Working PrincipleThe LT8390AIUFD#TRPBF controller is based on a buck-based switching regulator control topology, which combines the benefits of a high current buck converter and simultaneous synchronization for best-in-class efficiency in a low-cost solution.The controller is composed of a Pulse Width Modulation (PWM) high-side current sense oscillator, a continuously variable oscillator, and a duty cycle generator. These components regulate the output voltage and current according to the set parameters. The oscillator turns on and off the switching regulator to control the output voltage level through pulse width modulation. The duty cycle of the oscillator is adjusted by the set parameters and is used to regulate the output current. If the output voltage level is too low, the duty cycle is increased, and if it is too high, the duty cycle is reduced.The high-side current sense oscillator allows the controller to detect changes in the output current, and adjust the oscillator frequency and duty cycle accordingly. This allows the controller to adjust the output voltage and current quickly and accurately.The advantage of a synchronous buck controller is that it allows for high efficiency and low size and weight, which makes it ideal for applications where space and cost are limited.Overall, the LT8390AIUFD#TRPBF is an ideal chip for a wide range of industrial applications, and its ability to provide accurate and efficient power conversion makes it an excellent choice for power conversion.

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