LT8603IUJ#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)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

LT8603IUJ#TRPBF Application Field and Working Principle

LT8603IUJ#TRPBF is a high performance synchronous step-down DC-DC converter control integrated circuit. It is a product in the PMIC (Power Management Integrated Circuit) Voltage Regulators – DC DC Switching Controllers series from Linear Technology. The LT8603IUJ#TRPBF attends a wide range of competitive advantages. It provides an adjustable switching frequency from 60kHz to 1.7MHz, which allows users to optimize their design to reach the best efficiency and size results. The circuit also allows high frequency operation at light load scenarios, which helps keep a stable and higher efficiency. In addition to that, the device also provides cycle-by-cycle current limit and other protection features, allowing safe and reliable operation in all conditions.

Structure and Pinouts

The LT8603IUJ#TRPBF has an 8-pin package, with the pinout as following: | Pin Number | Function || :------------------ | :-------------- || 1 | FB (Feedback) || 2 | RT || 3 | GND || 4 | SW || 5 | IN || 6 | RUN || 7 | SS || 8 | : NC |The FB pin is the feedback control pin, responsible for regulating the output voltage. RT is the external resistor responsible for setting the switching frequency together with an external capacitor at the RUN pin. The RUN pin is responsible for soft start and frequency synchronization along with the external capacitor. The SS pin is the output soft start control pin, responsible for adding a soft start time to the converter start-up.

Application Field

The LT8603IUJ#TRPBF can be used in a variety of application fields, including portable electronics, distributed power systems, white goods, consumer electronics and industrial equipment. In portable electronics, LT8603IUJ#TRPBF can be used for the power management of chargers, smartphones, tablets, and wearables. It is capable of providing very efficient power conversion, achieving up to 90% efficiency. This helps to extend the battery life in these applications.In distributed power systems, it can be used to efficiently supply, generate, and distribute power from AC sources to hot spots. It provides high output current, allowing efficient and reliable power management in harsh environments.White goods are also a common application field for LT8603IUJ#TRPBF, with it being able to provide the necessary current requirement to motors, compressors, and other home appliances components.Furthermore, in consumer electronics, it is widely used in TV sets, speakers, amplifiers and other entertainment electronics, providing highly efficient and reliable power supply due to its high output current capability and fast transient response. Finally, it is also used in industrial equipment, providing the necessary voltage and current requirements for the operation of robotic arms and other automated systems.

Working Principle

The LT8603IUJ#TRPBF is a DC-DC power converter controller featuring a buck topology. It is capable of delivering up to 5A of output current, depending on the used external components.The overall working principle of the LT8603IUJ#TRPBF can be divided in three distinct stages. First, the incoming power from the input stage is converted from AC to DC via a rectifier and other components. Next, the circuit enters the switching stage, where the chip will start to convert the voltage according to the voltage at the feedback pin. The transistor used on this stage acts as a switch, closing and opening it rapidly in order to obtain the desired voltage. Finally, the last stage is the output one, where the voltage is regulated by the voltage at the feedback pin.Overall, through a combination of the high performance features of LT8603IUJ#TRPBF and the external components added, very efficient and reliable DC-DC power conversion is achieved.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description