LT3640EFE#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	Adjustable
Number of Outputs:	2
Voltage - Input (Min):	2.5V
Voltage - Input (Max):	35V
Voltage - Output (Min/Fixed):	0.6V, 1.265V
Voltage - Output (Max):	33.97V
Current - Output:	1.1A, 1.3A
Frequency - Switching:	500kHz ~ 2MHz
Synchronous Rectifier:	No
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package:	28-TSSOP-EP
Base Part Number:	LT3640

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Introduction of LT3640EFE#TRPBF

LT3640EFE#TRPBF is a high performance synchronous step-down DC-DC converter power management IC (PMIC) manufactured by Linear Technology. It contains two buck converters and features enhanced power conversion performance and ease of design.

Application Field of LT3640EFE#TRPBF

The LT3640EFE#TRPBF includes two regulated buck converters in a 4mm x 4mm QFN package and is designed to power a wide variety of applications, from space restricted portable electronics to high-current automotive systems. Three versions of the LT3640EFE#TRPBF are available, each with a different output current capability up to 4A.

Benefits of Using LT3640EFE#TRPBF

The LT3640EFE#TRPBF combines low-noise ripple, low quiescent current, high efficiency, and many fault protection functions, making it ideal for powering a variety of loads which need accurate regulation, high efficiency, and a low noise supply.The LT3640EFE#TRPBF includes several advanced features, such as programmable switching frequency, output over-voltage protection, and soft start. These features allow the user to adjust the step down converter to match the system requirements, while providing a safe operation, high power efficiency, and low output noise.

DC in DC out performance

The LT3640EFE#TRPBF offers excellent DC-DC performance. The output accuracy is better than ±1% over the full temperature range and with a constant switching frequency of 4.4 MHz, it offers a wide variety of output voltage settings. Additionally, the ESR of the output capacitors is automatically switched, increasing efficiency and giving the user more control over the system.The LT3640EFE#TRPBF is designed to provide a low-ripple, high efficiency power solution for applications that demand good voltage regulation, low noise, and a small form factor. It can be easily programmed for various output voltages, and its 10Ω/25Ω internal synchronous switch provides excellent ESR performance to minimize output ripple and noise.

Protection features

The LT3640EFE#TRPBF has multiple protections to ensure the system stability and reliability. These include over-voltage protection (OVP) and output current limiting (OCP). OVP prevents the output voltage from exceeding a certain threshold, while OCP prevents the device from drawing too much current.The LT3640EFE#TRPBF also contains thermal protection and input under voltage lockout (UVLO). Thermal protection helps to reduce the possibility of thermally-induced failure due to high operating temperatures, while UVLO prevents the device from operating until the input voltage is above a certain threshold.

Working Principle of LT3640EFE#TRPBF

The LT3640EFE#TRPBF is a synchronous DC-DC converter with two buck converters. It converts an input voltage to a lower output voltage with high power efficiency. The converter operates by turning on and off an internal switch FET in order to create a stepped-down output voltage. The output voltage is regulated to the desired level by internally compensating for changes in the input voltage and output load. When the input voltage rises, the converter increases the on-time of the switch FET to maintain the voltage regulation. Similarly, when the input voltage decreases, the on-time is decreased to maintain the output voltage. The LT3640EFE#TRPBF also features programmable switching frequency which can be adjusted to optimize component selection for specific application requirements. It has a switching frequency range of 300kHz to 4.4MHz, which allows the user to tailor the component selection for the target application.

Conclusion

The LT3640EFE#TRPBF is a high performance DC-DC converter PMIC, ideal for powering a variety of loads which require accurate regulation, high efficiency, and a low noise supply. The LT3640EFE#TRPBF features advanced features such as programmable switching frequency, output over-voltage protection, and a soft start. It also has several protections to ensure the system stability and reliability, such as over-voltage protection (OVP) and output current limiting (OCP). The LT3640EFE#TRPBF is a highly efficient and robust solution for DC-DC conversion applications.

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