LT1374IFE#TRPBF

Voltage - Output (Min/Fixed):	2.42V
Base Part Number:	LT1374
Supplier Device Package:	16-TSSOP-EP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	500kHz
Current - Output:	4.5A (Switch)
Voltage - Output (Max):	21.5V
Series:	--
Voltage - Input (Max):	25V
Voltage - Input (Min):	5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, SEPIC
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to LT1374IFE#TRPBF

LT1374IFE#TRPBF is an advanced DC-DC switch mode, non-isolated regulator from Linear Technology, a leader in power management solutions. This power management IC (PMIC) voltage regulator is designed for applications that require a wide input voltage range, high efficiency, and high power density. The LT1374IFE#TRPBF is perfect for new designs that require non-isolated solutions with robust external component requirements and supports a wide range of input voltages from 3V to 45V.

Features of the LT1374IFE#TRPBF

The LT1374IFE#TRPBF comes with integrated MOSFETs and 0.1μA IQ quiescent current, as well as current-mode PWM control to maximize light load efficiency and reliable start up. This device also includes Thermal Shutdown (TSD) and Total Power Shut Down (TPSD) protection to ensure thermal performance. Additionally, the LT1374IFE#TRPBF comes equipped with a standard 1.5MHz switching frequency and power save mode to reduce component size by allowing the use of small inductors and capacitors.

End Applications of LT1374IFE#TRPBF

The LT1374IFE#TRPBF makes an excellent choice for a wide range of applications, including DC motor control, battery charging and backup systems, cellular phones, audio/video equipment, microprocessors and DSPs, and portable medical equipment, among others.

Working Principle

The LT1374IFE#TRPBF is a DC-DC switching regulator that utilizes a current-mode control scheme. It operates at the constant frequency and utilizes an internal PWM-controlled switch to deliver power from the input voltage to the output voltage while regulating its output voltage level. Under normal operating conditions, the internal switch device conducts, providing power to the output by sourcing current to the output through the inductor. When the output voltage reaches the desired voltage level, the switch device is turned off, preventing further power transfer. The LT1374IFE#TRPBF can support up to 3A of output current and operates over a wide input voltage range of 3V to 45V, which makes it a perfect choice for any number of applications.

Advantages of LT1374IFE#TRPBF Switching Regulator

The LT1374IFE#TRPBF switching regulator has numerous advantages over linear regulators due to it design and internal components. One of the main advantages of the LT1374IFE#TRPBF is its high efficiency: by operating at the constant frequency and switching the current on and off, it is able to minimize power losses that can occur with linear regulation. Additionally, the LT1374IFE#TRPBF\'s switching design allows for a much larger input voltage range than can be achieved with linear regulators, making it suitable for a variety of applications. Finally, due to its power save mode, the LT1374IFE#TRPBF allows for the use of smaller external components than a linear regulator, reducing design complexity and cost.

External Components Required for the Application of LT1374IFE#TRPBF

The LT1374IFE#TRPBF requires the use of an external inductor to deliver power to the output voltage with efficiency. An external inductor\'s inductance is proportional to the voltage and current of the system and is therefore selected based on the application\'s target output voltage and current. The selection of the external inductor also depends on the operating switching frequency and the DC resistance of the inductor. Furthermore, the LT1374IFE#TRPBF also requires the use of an external capacitor to regulate the output voltage and reduce output ripple. The capacitor must be rated for operation at the maximum output voltage, and should preferably have a low ESR value, high operating frequency and high capacitance.

Conclusion

The LT1374IFE#TRPBF is an advanced DC-DC switch mode, non-isolated voltage regulator from Linear Technology. This PMIC voltage regulator is perfect for new designs that require non-isolated solutions, a wide input voltage range, and high efficiency and power density, and can be used for a variety of applications. The LT1374IFE#TRPBF is operated at a constant switching frequency and utilizes an internal PWM-controlled switch to deliver power from the input voltage to the output voltage. It also requires the use of a external inductor and capacitor to regulate output voltage and reduce output ripple. The LT1374IFE#TRPBF is a highly efficient, cost effective, and reliable solution for any non-isolated application.

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