LT3753EFE#TRPBF

Frequency - Switching:	100kHz ~ 500kHz
Base Part Number:	LT3753
Supplier Device Package:	38-TSSOP-EP
Package / Case:	38-TFSOP (0.173", 4.40mm Width), 31 Leads, Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Frequency Control, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	8.5 V ~ 100 V
Output Phases:	1
Number of Outputs:	1
Topology:	Forward Converter
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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< background-color:#E0FFFF > < font-size:20; font-family:Verdana>LT3753EFE#TRPBF Application Field and Working Principle PMICs, or Power Management ICs, are an important component of today\'s electronics circuits. They provide power control and voltage regulation for low voltage, low power and high power devices. One such device is the LT3753EFE#TRPBF, an advanced, synchronous, and monolithic buck DC-DC switching controller from Linear Technology.The LT3753EFE#TRPBF is designed to provide low output voltage ripple and high efficiency while operating across a wide range of line, load and switching frequencies. It is ideal for applications that need low power consumption and high power efficiency, such as portable battery-powered systems. The device features adaptive frequency modulation and dynamic switching frequency with up to 3.0MHz switching frequency, and respectively 600kHz under heavy load, while still maintaining an accurate regulation point.The LT3753EFE#TRPBF can be used in a variety of applications including, but not limited to, DC-DC converter applications, buck switching converters, buck-boost converter, LED driver systems, and power management for digital and analog circuits.Working PrincipleThe LT3753EFE#TRPBF is a synchronous monolithic buck DC-DC switching controller that uses adaptive frequency modulation and a feedback control loop to regulate the output voltage. The device uses a control loop to sense the output voltage and make adjustments to the switching frequency in order to maintain a set regulation level.The device consists of two integrated parts: the PWM controller and the adjustable frequency oscillator. The PWM controller uses two comparators and two MOSFET drivers to run the power stage, while the oscillator generates a ramp signal used as the clock to time the PWM switching.The device also features a wide array of features that can be used to optimize the switching characteristics, such as adjustable soft-start and over-current protection, frequency correction, floating VLIM (load line) setting, and over-voltage protection.ConclusionThe LT3753EFE#TRPBF is an efficient and versatile monolithic buck switching controller that is ideal for low power and high power applications. It offers low output voltage ripple and high efficiency, while featuring an adaptive frequency modulation and a dynamic switching frequency. It is a great choice for applications such as DC-DC converters, buck-boost converters, LED drivers and other power management applications.

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