LT3991EMSE#TRPBF

Voltage - Output (Min/Fixed):	1.19V
Base Part Number:	LT3991
Supplier Device Package:	10-MSOP-EP
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	200kHz ~ 2MHz
Current - Output:	1.2A
Voltage - Output (Max):	30V
Series:	--
Voltage - Input (Max):	55V
Voltage - Input (Min):	4.3V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC - Voltage Regulators - DC DC Switching Regulators

The LT3991EMSE#TRPBF, a DC-DC switching regulator, belongs to a class of useful electrical circuit components known as switching regulators. These components are used to take the power from a source, such as a battery, and convert it into usable power, such as a voltage or current, at a different output.Switching regulators generally consist of two main parts: the power converter and the control circuit. The power converter is responsible for taking the power from the source and converting it into the desired form at the output. The control circuit is responsible for controlling the operation of the power converter, and for controlling the feedback and switching elements that control the flow of power.The LT3991EMSE#TRPBF is a switched mode power supply (SMPS) regulator and is capable of delivering from 500mA to 3A of output current. Additionally, it can be set up to have either a 3A or 6A peak current limit. The device features a wide input voltage range, making it suitable for a variety of different applications. Its P-channel MOSFET power transistor allows for a very low ground current, low output ripple, and low power dissipation. Additionally, it has a very low quiescent current and can be shut down with a simple TTL digital control.A typical application for the LT3991EMSE#TRPBF is in embedded systems, where the high current capabilities make it ideal for powering devices such as Sensors, A/D and D/A converters, and microprocessors. It can also be used in automotive, industrial, and medical applications.The LT3991EMSE#TRPBF is a synchronous, step-down regulator and its working principle is based on the concept of a buck converter. It relies on a comparator circuit and the associated control logic to control the output voltage as well as a power MOSFET to switch the power from the source to the output. The step-down converter works by reducing the input voltage to the desired output level.When the power converter is enabled, the feedback signal from the comparator circuit is used to start the MOSFET switch in the power MOSFET, bridging the source and the output. The feedback signal is then sent to the control logic which adjusts the output voltage as necessary to maintain a constant voltage. The comparator circuit also senses when the output voltage has reached the desired level and turns off the MOSFET. The power MOSFET then turns off and the output voltage remains at its desired level.In summary, the LT3991EMSE#TRPBF is a versatile device that can be used to provide current or voltage regulation in a wide variety of applications. It is capable of delivering high current and has a wide input voltage range. Additionally, the low ground current, low output ripple, and low power dissipation afforded by the P-channel MOSFET power transistor make this device suitable for use in many applications.

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