LT3840EUFE#TRPBF

Frequency - Switching:	50kHz ~ 1MHz
Base Part Number:	LT3840
Supplier Device Package:	38-QFN (4x6)
Package / Case:	38-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Frequency Control, Power Good, Soft Start, Tracking
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	99%
Series:	--
Voltage - Supply (Vcc/Vdd):	2.5 V ~ 60 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive or Negative
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LT3840EUFE#TRPBF Application Field and Working Principle

LT3840EUFE#TRPBF is a Power Management Integrated Circuit (PMIC) belonging to the category of Voltage Regulators and DC DC Switching Controllers. It is developed by Linear Technology and offers various features such high power operating mode, integrated MOSFETs, input voltage protection, output overvoltage protection and thermally shutdown protection.

Application Field of LT3840EUFE#TRPBF

The LT3840EUFE#TRPBF can be used in a variety of applications including DC-DC converters, battery charging, multi-phase buck-boost converters and load sharing of multiple power sources. This device also enables engineers to design fault-tolerant systems and provides high reliability and flexibility.

Working Principle of LT3840EUFE#TRPBF

The LT3840EUFE#TRPBF voltage regulator utilizes a synchronous buck-boost topology to provide an adjustable output voltage from 2.5V to 38V. It employs two integrated switching MOSFETs and a third, external, N-channel MOSFET to achieve a continuous current rating of up to 5A while providing low output ripple and efficiency.The device provides user programmable control of the power supply via the SYNC signal, allowing the use of either a fixed frequency or an external clock signal. The LT3840EUFE#TRPBF includes overvoltage, overtemperature, and input UVLO protection, as well as cycle-by-cycle current limit, internal soft start, and safety-timer functions.

Conclusion

The LT3840EUFE#TRPBF from Linear Technology is a high-performance, cost-effective power management integrated circuit that enables engineers to implement DC-DC converters, battery charging, and multi-phase buck-boost converters. This PMIC features integrated MOSFETs and a third, external, N-channel MOSFET, and offers advanced protection features as well as user programmable control via the SYNC signal.

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