LT8710EFE#PBF

Function:	Step-Up, Step-Down, Step-Up/Step-Down
Output Configuration:	Positive or Negative
Topology:	Boost, Flyback, SEPIC
Number of Outputs:	1
Output Phases:	1
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 80 V
Frequency - Switching:	100kHz ~ 750kHz
Duty Cycle (Max):	--
Synchronous Rectifier:	Yes
Clock Sync:	Yes
Serial Interfaces:	--
Control Features:	Enable, Frequency Control, Soft Start
Operating Temperature:	-40°C ~ 125°C (TJ)
Package / Case:	20-TSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package:	20-TSSOP-EP
Base Part Number:	LT8710
Series:	--
Packaging:	Tube
Part Status:	Active
Output Type:	Transistor Driver

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LT8710EFE#PBF Application Field and Working Principle

IntroductionThe LT8710EFE#PBF is a highly efficient, non-phase-shift DC-DC converter designed for applications ranging from battery-operated systems to intermediate DC-DC conversion in distributed power architectures. The LT8710EFE#PBF uses a fixed frequency peak current mode control to provide a simple solution for single and multi-output power conversion requirements. The working principle and application field of the LT8710EFE#PBF will be explained in this article.Working PrincipleThe LT8710EFE#PBF is a synchronous boost DC-DC converter. It uses a peak current mode control method, wherein the current in the power switch is sensed directly and compared to a fixed frequency triangular waveform reference. When the sense current reaches the peak of the reference waveform, the switch is turning off (see Figure 1).

Figure 1: Peak-Current-Mode Control Block Diagram

A feedback voltage is applied to the error amplifier input and compared with a reference voltage to determine the power switch on-time. The current-limit comparator senses the inductor current, and it is compared to the reference current limit level. The error amplifier can also be used to set the maximum switch on-time for output overvoltage protection.The LT8710EFE#PBF has an adjustable input undervoltage lockout to enhance the efficiency of light-load operation. The current-mode control loop also includes a peak current limit (I_peak) that can be used to set the current level at which the power switch turns off. The I_P voltage control pin allows direct control of the peak current limit. The peak current level is increased by increasing this voltage, and the peak current level is reduced by lowering the voltage.Application FieldThe LT8710EFE#PBF is a high-efficiency non-phase-shift DC-DC converter designed for applications ranging from battery-operated systems to intermediate DC-DC conversion in distributed power architectures. Its wide input voltage range, high efficiency and wide output range make it ideal for a variety of applications, such as digital SLR (single-lens reflex) cameras, PDAs, cell phones, audio amplifiers and other portable equipment. The LT8710EFE#PBF is also an ideal solution for battery-operated systems, because its switch-on voltage can be set to the battery voltage, thus optimizing efficiency.The LT8710EFE#PBF is an ideal solution for intermediate voltage conversion in distributed power architectures. It can be used to generate a regulated 5V or 3.3V rail from a variety of sources, or to generate multiple output voltages. The regulated 5V or 3.3V rail can then be used to power peripheral I/Os or other on-board devices.ConclusionThe LT8710EFE#PBF is a high-efficiency, non-phase-shift DC-DC converter designed for applications ranging from battery-operated systems to intermediate DC-DC conversion in distributed power architectures. Its wide input voltage range, high efficiency and wide output range make it an ideal solution for a wide range of applications, such as digital SLR cameras, PDAs, cell phones, audio amplifiers and other portable equipment. The peak current mode control method used by the LT8710EFE#PBF provides a simple and effective solution for generating multiple output voltages, ensuring high efficiency and reliability. References [1]https://www.analog.com/media/en/technical-documentation/data-sheets/LT8310.pdf [2]https://www.linear.com/product/LT8710EFE#PBF

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