LT8603EUJ#TRPBF

Frequency - Switching:	250kHz ~ 2.2MHz
Base Part Number:	LT8603
Supplier Device Package:	40-QFN (6x6)
Package / Case:	40-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Current Limit, Power Good, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	3 V ~ 42 V
Output Phases:	2
Number of Outputs:	4
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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Introduction to LT8603EUJ#TRPBF

LT8603EUJ#TRPBF is a DC/DC switching controller designed specifically for high-current, high density applications. It supports up to 8A output current and is capable of driving switches with a maximum of 10A current capability. LT8603EUJ#TRPBF offers a wide range of features that make it suitable for a variety of voltage regulator and power management applications.

Application Field of LT8603EUJ#TRPBF

LT8603EUJ#TRPBF is suitable for a variety of voltage regulator and power management applications. It is especially well-suited for high-current, high-density applications, such as cloud computing, graphics cards, and automotive applications. Other applications include RF power amplifiers, USB Type-C power delivery, and USB, 12V, and 28V motor drives.

Working Principle of LT8603EUJ#TRPBF

The LT8603EUJ#TRPBF employs a constant-frequency current mode (CFCM) architecture, which enables synchronous rectification and active current sharing when used in a multiphase configuration. In a single-phase application, it provides constant-on-time (COT) control with a soft-start ramp. The constant-on-time approach provides smooth transitions between PWM and burst-mode operation for maximum efficiency.The switching frequency of the LT8603EUJ#TRPBF can be programmed from 100kHz to 800kHz. An enable pin is available to quickly turn the IC on and off, allowing for faster transient response and higher efficiency during light-load operations. A SYNC pin can be used to synchronize the internal current-mode oscillator with an external clock source in order to synchronize multiple supplies.The onboard 400mV reference allows for precise control of output voltage over the entire operating range. In addition, the device offers a programmable soft-start capability, an internal slope compensation feature, an overvoltage protection circuit, and cycle-by-cycle overcurrent protection.

Conclusion

The LT8603EUJ#TRPBF is a high-current, high-density switching controller designed for a variety of voltage regulator and power management applications. It offers a wide range of features, including a constant-frequency current mode architecture, programmable switching frequency, enable pin, SYNC pin, 400mV reference, soft-start capability, and a variety of protection features. The LT8603EUJ#TRPBF is an ideal choice for high-current, high-density applications, such as cloud computing, graphics cards, and automotive applications.

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