LT3990EMSE-3.3#TRPBF

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:	Tape & Reel (TR)

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LT3990EMSE-3.3#TRPBF Application Field and Working Principle

The LT3990EMSE-3.3#TRPBF is an integrated switching regulator device produced by Analog Technologies Inc. It is categorized as a PMIC (Power Management IC), Voltage Regulators, and DC DC Switching Regulators. Specifically, it is a high-efficiency, compact, and heavy-duty step-down/down-shift DC-DC converter capable of achieving a wide output voltage range of 2.5V to 22V. Its power conversion efficiency is up to 94%, and it can further reduce the noise and ripple of the output voltage. The LT3990EMSE-3.3#TRPBF is specifically designed for applications which require an efficient conversion of voltage from higher input voltages down to a lower output voltage with minimal noise. Applications for this device range from industrial and automotive systems to consumer electronics. In particular, it is suitable for harsh industrial environments, due to its superior design for high voltage stability and immunity to transients. This device also features a high current output that makes it suitable for high-power applications.

Device Features

The LT3990EMSE-3.3#TRPBF features a wide input voltage range of 4.5V to 36V, which makes it suitable for use in automotive, industrial, and consumer applications. Additionally, it enables both step-down and down-shift voltage conversions. This allows the user to achieve a wide output voltage range of 2.5V to 22V, allowing them to employ a single device for multiple high voltage applications. This device uses high-current integrated MOSFETs, and is configured to provide up to 10A continuous output current, with a peak current of 20A.

Working Principle

The LT3990EMSE-3.3#TRPBF is configured in a constant-current/constant-frequency synchronous buck topology. It continuously senses the output current, and responds to changes in the load current with a regulated output voltage. The device works by using two N-Channel MOSFETs, each of which connect in a synchronous manner. When the output voltage begins to drop, the device detects this change and initiates a duty-cycle correction process, whereby the duty-cycle of the MOSFETs is adjusted to maintain the constant output voltage. This device also contains a wide range of protection features. It has an adjustable over-current protection feature that prevents it from overheating if the load exceeds the current limit. Additionally, it has an adjustable under-voltage protection feature to prevent the output voltage from dropping below the minimum specified level. Furthermore, it includes soft-start, overtemperature protection, and short-circuit protection features.

Conclusion

The LT3990EMSE-3.3#TRPBF is an integrated switching regulator device produced by Analog Technologies Inc. It is suitable for harsh industrial environments, due to its superior design for high voltage stability and immunity to transients. Additionally, it enables both step-down and down-shift voltage conversions, allowing the user to achieve a wide output voltage range of 2.5V to 22V. Furthermore, this device uses high-current integrated MOSFETs, and is configured to provide up to 10A continuous output current, with a peak current of 20A. It also has a wide range of protection features, including over-current, under-voltage, soft-start, overtemperature, and short-circuit protection.

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