LT8471EUFD#PBF

Voltage - Output (Min/Fixed):	2.6V
Base Part Number:	LT8471
Supplier Device Package:	28-QFN (4x5)
Package / Case:	28-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	100kHz ~ 2MHz
Current - Output:	1.35A (Switch), 2.1A (Switch)
Voltage - Output (Max):	50V (Switch)
Series:	--
Voltage - Input (Max):	50V
Voltage - Input (Min):	2.6V
Number of Outputs:	2
Output Type:	Adjustable
Topology:	Buck, Boost, Flyback, SEPIC
Output Configuration:	Positive or Negative
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tube

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LT8471EUFD#PBF Application Field and Working Principle

Introduction

The LT8471EUFD#PBF DC-DC converter is an innovative switching regulator designed to improve efficiency and reduce components in a wide range of applications. As a high-performance load switch, the LT8471 features over-temperature and overcurrent protection, Under-Voltage Lockout (UVLO) for startup and shutoff. Advanced features such as synchronous rectification, programmable soft-start, selectable frequency and pulse skipping enable precise control for a variety of load conditions, further adding to its power-saving proficiency.

Classification

The LT8471EUFD#PBF belongs to the Power Management IC (PMIC) family, specifically a voltage regulator or DC-DC switching regulator. It supports a wide range of output voltages between 1.8V and 5V.

Application Field

The LT8471 is highly suitable for automotive and industrial applications, providing system-level reliability, efficiency and robustness in the face of environmental and operating conditions. As the use of digital logic in automotive and industrial applications continues to grow, system designers require more efficient and reliable voltage regulation solutions. The LT8471 is the ideal choice for such applications.

Performance

The LT8471 operates over a wide input voltage range, from 0 to 45V. Moreover, it supports a wide output voltage range, from 1.8V to 5V. High efficiency is achieved with synchronous rectification for best power conversion. The LT8471 features integrated over temperature protection, overcurrent protection, programmable soft-start and adjustable frequency.

Features and Benefits

• Wide input voltage range: 0 to 45V
• Wide output voltage range: 1.8V to 5V
• Integrated over temperature protection and over current protection
• Synchronous rectification for best efficiency
• Programmable soft-start
• Selectable output frequency
• Pulse-skipping mode for low power consumption in light load conditions

Working Principle

The LT8471EUFD#PBF is a highly efficient DC-DC switching regulator. It provides a stable power supply to an output voltage of 1.8V to 5V.The LT8471EUFD#PBF is designed to maintain a constant output voltage, even when the input voltage changes. It uses switching elements, typically MOSFETs, to store and release energy to provide a stable output voltage. The switching elements, along with an inductor and a capacitor, form a SEPIC (single ended primary inductance converter) topology, providing the switching regulator design flexibility.The LT8471EUFD#PBF has several advanced features in its design. The SEPIC topology allows the output voltage to be higher or lower than the input voltage, which eliminates the need for an external booster or boost-buck circuit. Synchronous rectification further improves efficiency, while a programmable soft-start feature helps reduce inrush current.The LT8471EUFD#PBF also features adjustable-frequency operation, which provides a wide frequency range for low-noise or low-vibration applications. Lastly, it has a pulse-skipping operating mode, which allows for low power consumption during light-load conditions.

Conclusion

The LT8471EUFD#PBF is a high-performance DC-DC switching regulator, which provides a reliable and efficient power supply to a wide range of applications. Thanks to its advanced features and design, it improves system-level reliability, efficiency and robustness. With synchronous rectification, adjustable frequency and pulse-skipping, the LT8471EUFD#PBF is suitable for automotive and industrial applications.

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