LT3042EDD#PBF

Voltage Dropout (Max):	0.35V @ 200mA (Typ)
Base Part Number:	LT3042
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Reverse Polarity
Control Features:	Current Limit, Enable, Power Good
PSRR:	117dB ~ 56dB (120Hz ~ 10MHz)
Current - Output:	200mA
Series:	--
Voltage - Output (Max):	15V
Voltage - Output (Min/Fixed):	0V
Voltage - Input (Max):	20V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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Introduction to LT3042EDD#PBF

The LT3042EDD#PBF device is a high-performance, high-efficiency, low-power, low-voltage linear voltage regulator. It is manufactured by Linear Technology and combines the efficient, high-current performance of the previous LT3042 generations with the improved power dissipation and programmable output current limit of previous-generation LT3042 family regulators.This highly efficient regulator has an operating temperature range of -20C to 125C, which allows it to be used in a wide range of applications. The design helps reduce board space as the regulator occupies a small footprint of up to 2 mm square.

Application Field and Working Principle of LT3042EDD#PBF

The LT3042EDD#PBF is suitable for many applications, including low-voltage, low-power buck and boost regulator designs and battery chargers. It can also be used in Li-ion battery applications, providing very low dropout linear regulation in the 0.75V to 3V range. It is also well suited for LED lighting applications, providing superior efficiency and high-current performance, while reducing power dissipation.The regulator also features an On/Off pin which enables the user to control the regulator status. This pin can be programmed to enable or disable either automatic or manual operation. In manual operation, the regulator is turned on and off by the user with a logic signal. In automatic operation, the regulator is turned on and off by the load.The four-terminal regulator has a unique structure which enables it to deliver current with high efficiency. The four-terminal structure allows current to be delivered from one end of the regulator to the other, leaving the input section free for other operations. This four-terminal structure also helps improve power dissipation and reduce noise when compared to three-terminal linear regulators.The LT3042EDD#PBF also has a controllable output current limit feature which can be used to limit the output current of the regulator and protect against over-current scenarios. This feature can be enabled or disabled via a resistor on the “ILIM” pin.The regulator also features a programmable under-voltage lockout (UVLO), which is used to prevent the device from operating at too-low input voltages. A resistor connected to the UVLO pin determines the minimum set-point at which the device is allowed to operate.The LT3042EDD#PBF also has a programmable soft-start feature which helps reduce inrush current and reduces the possibility of circuit start-up issues. This feature can be enabled or disabled via a resistor connected to the “SS” pin.

Conclusion

The LT3042EDD#PBF linear regulator is a highly efficient device suitable for many applications. It features a four-terminal structure which enables it to deliver current with high efficiency, while reducing power dissipation and noise. It also has a controllable output current limit, a programmable under-voltage lockout and a programmable soft-start feature. All these features make the LT3042EDD#PBF an excellent choice for low-power, low-voltage linear voltage regulation.

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