LT8302ES8E#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Up/Step-Down
Output Configuration:	Positive or Negative, Isolation Capable
Topology:	Flyback
Output Type:	--
Number of Outputs:	1
Voltage - Input (Min):	2.8V
Voltage - Input (Max):	42V
Voltage - Output (Min/Fixed):	--
Voltage - Output (Max):	--
Current - Output:	3.6A
Frequency - Switching:	Down to 12kHz
Synchronous Rectifier:	No
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Supplier Device Package:	8-SOIC-EP
Base Part Number:	LT8302

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LT8302ES8E#TRPBF Application Field and Working Principle

LT8302ES8E#TRPBF belongs to the category of PMIC - Voltage Regulators - DC DC Switching Regulators. It is a wide V IN , synchronous buck regulator featuring a 50-volt, 800mA switch with integrated power MOSFET for high reliability. The device operates from up to 5.5V input supply, making it suitable for a variety of low-power industrial, medical, computing, and consumer applications.

Applications

LT8302ES8E#TRPBF is suitable for the following applications:

• Battery powered systems
• Medical equipment
• Compact, low-power equipment
• Portable communications equipment
• Software and hardware reset circuits
• Data entry/storage devices

Overview

The LT8302ES8E#TRPBF integrates a wide V IN , synchronous buck regulator into a small 4 mm × 4 mm QFN package. It is designed to provide high efficiency and wide input voltage operation over the full operating temperature range. The device includes an integrated high-side MOSFET and a low-side MOSFET and is ideal for applications requiring low noise, high-efficiency operation. The LT8302ES8E#TRPBF has very low quiescent current and is optimized for light load efficiencies, making it perfect for battery powered applications.

Features

LT8302ES8E#TRPBF features include:

• Input voltage range: 2.7 V to 5.5 V
• Output voltage range: 0.8 V to V IN
• Output current: 800mA
• Integrated high-side and low-side transistors
• Constant current mode operation available
• Programmable soft−start
• Programmable Frequency up to 1.5MHz
• Configurable frequency foldback
• Compact 4mm×4mm QFN package

Working Principle

The LT8302ES8E#TRPBF is a wide V IN , synchronous buck regulator featuring a 50-volt, 800mA switch with integrated power MOSFET for high reliability. It is designed to provide high efficiency and wide input voltage operation over the full operating temperature range. The core of the LT8302ES8E#TRPBF is the synchronous buck converter control circuit and the integrated MOSFET switches. When the LT8302ES8E#TRPBF is enabled, the high-side switch (upper MOSFET) is turned on and the low-side switch (bottom MOSFET) is turned off. This connects the input voltage to the output capacitor and ground, establishing a path for the current to flow. The controller adjusts the gate voltage on the high-side switch so that the voltage dropped across it maintains a constant voltage at the output node and keeps the output voltage regulated.At the same time, the low-side switch is controlled in a similar way. When the high-side switch turns off, the low-side switch turns on and is adjusted so that the voltage dropped across it maintains a constant voltage at the output node. This is repeated at each cycle to provide a regulated output voltage. The LT8302ES8E#TRPBF also includes an integrated soft-start circuit that can be programmed to start up slowly, reducing inrush current at power-up. The integrated foldback feature further improves the system efficiency by reducing the switching frequency under light load conditions.

Conclusion

The LT8302ES8E#TRPBF is a wide V IN , synchronous buck regulator featuring a 50-volt, 800mA switch with integrated power MOSFET for high reliability. It is designed to provide high efficiency and wide input voltage operation over the full operating temperature range. The LT8302ES8E#TRPBF is ideal for applications requiring low noise, high-efficiency operations, such as battery powered systems, medical equipment, compact, low-power equipment, portable communications equipment, software and hardware reset circuits, and data entry/storage devices.

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