LT3990IMSE-3.3#PBF

Voltage - Output (Min/Fixed):	3.3V
Base Part Number:	LT3990
Supplier Device Package:	16-MSOP-EP
Package / Case:	16-TFSOP (0.118", 3.00mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	210kHz ~ 2.3MHz
Current - Output:	350mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	62V
Voltage - Input (Min):	4.2V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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The LT3990IMSE-3.3#PBF is an application specific integrated circuit (ASIC) designed and built by Linear Technology Corporation primarily used in DC/DC switching power supply systems as a voltage regulator. It is capable of driving a load current up to 1A and features adjustable voltage regulation, an adjustable output current limit and an adjustable maximum duty cycle. Its input voltage can range from 5V to 24V, while its output voltage can be varied from 3.5V to 25V.The LT3990IMSE-3.3#PBF takes an input voltage and pulses it in a particular manner to produce a high current output at a lower voltage in order to regulate the power supply. This process is known as Pulse Width Modulation (PWM) and is divided into two specific stages. The first is known as the buck switching stage where the peak current feedback through the low side of the transistor is sensed and used to control the duty cycle of the PWM signal. This duty cycle is then compared to the reference voltage of the input voltage to determine the desired output voltage. The second stage is known as the linear regulator stage where the output voltage is stabilized by an op-amp and a pair of MOSFETs.The LT3990IMSE-3.3#PBF is suitable for a wide variety of applications, including systems dealing with power distribution, portable electronics, motor control and power conversion. It is also suitable for applications involving display technologies, battery powered systems, lighting systems and signal transmissions.The LT3990IMSE-3.3#PBF is designed to be easily integrated into existing systems, providing excellent efficiency and a simple solution to complex power requirements. It also offers a significant advantage over linear regulators in that it does not require as many components and offers a wider range of output voltage options.In addition to its excellent regulatory ability, the LT3990IMSE-3.3#PBF also features a number of protection features, including a thermal shutdown protection that activates when the core temperature exceeds the specified limit and an overvoltage protection that activates when the input voltage exceeds the expected level. These features help the regulator to stay safe in all operating conditions.Overall, the LT3990IMSE-3.3#PBF is a versatile, high performance voltage regulator that can handle a wide variety of complex power requirements while offering excellent efficiency, stability and protection features. It is suitable for a wide range of applications, making it an ideal solution for many DC/DC switching power supplies.

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