LT3579EUFD#PBF

Series:	--
Packaging:	Tube
Part Status:	Active
Function:	Step-Up, Step-Up/Step-Down
Output Configuration:	Positive or Negative
Topology:	Boost, Charge Pump, Cuk, Flyback, SEPIC
Output Type:	Adjustable
Number of Outputs:	1
Voltage - Input (Min):	2.5V
Voltage - Input (Max):	16V
Voltage - Output (Min/Fixed):	1.215V
Voltage - Output (Max):	42V (Switch)
Current - Output:	6A (Switch)
Frequency - Switching:	200kHz ~ 2.5MHz
Synchronous Rectifier:	No
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	20-WFQFN Exposed Pad
Supplier Device Package:	20-QFN (5x4)
Base Part Number:	LT3579

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LT3579EUFD#PBF Application Field and Working PrincipleLT3579EUFD#PBF is a high performance, cost effective, low noise 6-pin switching regulator and power supply chip. As a DC/DC switching regulator, LT3579EUFD#PBF is widely used in various power supply design applications. It is specifically designed for high current applications, providing a wide variety of features and capabilities.ApplicationsLT3579EUFD#PBF is widely used in a variety of power supply design applications. It is specifically designed for high current applications, providing a wide variety of features and capabilities. The main applications of this chip include powering LCD panels, communications, computing and automatic control, automotive power supplies, industrial automated control and battery powered applications.FeaturesLT3579EUFD#PBF has many features which make it suitable for various power supply design applications. It features a wide input voltage range (3V - 28V), a low dropout voltage of only 0.2V, adjustable output voltage, and low noise level of 1.8% at full load for noise sensitive applications. The integrated circuit offers fixed frequency operation and output current of up to 10A. Furthermore, it provides programmable soft-start, current limit, and hiccup-mode protection. This chip also offers adjustable switching frequency from 1kHz to 600kHz.Working PrincipleLT3579EUFD#PBF is a DC/DC switching regulator, which is designed to convert one DC voltage level to another. It works on the principle of pulse-width modulation (PWM), where the output voltage is regulated by varying the width of the pulses applied to an inductor. The chip converts a voltage source to a higher or lower voltage level by switching the power switch rapidly between two states, either switch on or switch off. As a result, the input DC voltage is converted to a higher or lower converted voltage.When the switch is in the “on” state, it connects a power source to the inductor, allowing it to store energy. When the switch is in the “off” state, energy is released from the inductor, which gets transferred to the output and helps regulate the output voltage. The output voltage is determined by the ratio of the input voltage and the output voltage. The chip also uses current-limiting and thermal-protection circuits to protect against current overload or high-temperature conditions.ConclusionLT3579EUFD#PBF is an efficient and cost-effective DC/DC switching regulator for various power supply designs. It is especially designed for high current applications, and offers a wide range of features and capabilities such as adjustable output voltage, low dropout voltage and low noise level. The chip also has several protection mechanisms, like current limiting and thermal protection, which help in protecting the chip from damage.

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