LT3957AIUHE#TRPBF

Voltage - Output (Min/Fixed):	1.6V
Base Part Number:	LT3957
Supplier Device Package:	36-QFN (5x6)
Package / Case:	36-WFQFN, 28 Leads, Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	100kHz ~ 1MHz
Current - Output:	5A (Switch)
Voltage - Output (Max):	40V (Switch)
Series:	--
Voltage - Input (Max):	40V
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Boost, Cuk, Flyback, SEPIC
Output Configuration:	Positive or Negative
Function:	Step-Up, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LT3957AIUHE#TRPBF DC/DC switching regulator is a high-performance, low-noise switching regulator designed for use in applications such as laptops, tablets, cell phones, home theater components, and automotive electronics. It is specifically designed to ensure energy efficiency, phase noise reduction, excellent light load efficiency, and low dropout voltage.

Features

The LT3957AIUHE#TRPBF has a wide operating temperature range from −40°C to 85°C and offers adjustable output voltage up to 28V and up to 6A of output current. It also includes an integrated 550mA low-dropout (LDO) regulator and built-in soft- start capabilities, which allow for easy integration into an application’s power system. The regulator also features an adjustable soft-start time of up to 85µs, which makes it suitable for use in battery operated applications. In addition, it also offers an internal soft-start signal, as well as an optional external soft-start signal, to minimize inrush current.

Operation

The LT3957AIUHE#TRPBF operates in two modes: undervoltage protection (UVLO) and peak cur rent protection (PCP). Its UVLO feature prevents startup of the regulator if the input voltage falls below a certain predetermined level. Its PCP feature regulates the current to prevent overloading of the regulator.The LT3957AIUHE#TRPBF can also be configured for dual phase operation, which allows for improved regulation and phase noise characteristics. It also features automatic current-limit protection and over temperature protection.

Applications

The primary applications of the LT3957AIUHE#TRPBF are in laptops, tablets, cell phones, home theatre components, and automotive electronics. It can also be used in other applications that require high-performance switching regulators with low phase noise, adjustable voltage and current, and wide operating temperature range.

Conclusion

The LT3957AIUHE#TRPBF is a high-performance, low-noise DC/DC switching regulator that is specifically designed to provide excellent energy efficiency, phase noise reduction, light load efficiency, and low dropout voltage. It includes several features, such as adjustable output voltage up to 28V, up to 6A of output current, integrated 550mA LDO regulator, built-in soft-start capabilities, and adjustable soft-start time. It is suitable for use in automatic current-limit protection, over temperature protection, laptop, tablet, cell phone, home theatre, and automotive applications.

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