LT3999EDD#TRPBF Integrated Circuits (ICs)

Voltage - Output (Min/Fixed):	--
Base Part Number:	LT3999
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	50kHz ~ 1MHz
Current - Output:	1A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	36V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Push-Pull
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC - Voltage Regulators - DC DC Switching Regulators

The LT3999EDD#TRPBF is a high frequency synchronous buck switching voltage regulator, which was first released to the market by Linear Technology in 2015. The regulator consists of a temperature compensated reference and an error amplifier, operating at up to 1.2MHz, feedback comparator, and current limit circuitry, packaged in a tiny 3-by-3 mm package. By changing the two external resistors, the output voltage range can be adjusted from 0.8V to 6V, and its output current can be set up to 5A.The LT3999EDD#TRPBF switching regulator provides efficient and reliable voltage conversion from a single-input source to an adjustable output voltage. It is a synchronous buck regulator that consists of a main power switch, an internal compensation network and a low-side switch for efficient operation. The buck regulator uses P-channel and N-channel MOSFETs for internal switching, to achieve a high efficiency transfer from input to output. The internal synchronous rectifier allows for a high frequency operation with a low RDS(on) while switching at a pre-determined frequency. The output voltage is adjustable by setting two resistors, one connected to the FB pin connected to the Error Amplifier and the second connected to VSET pin connected to the ground.The LT3999EDD#TRPBF provides an output active high synchronization pin that allows the user to synchronize two or more voltage regulators in a master-slave configuration. This synchronization pin can be used to ensure the output voltage between the regulators stay withing a certain accuracy. The synchronous switching feature also provides the advantage of reducing switching losses and output voltage ripple, leading to improved performance and applications which require very low output voltage ripple.The LT3999EDD#TRPBF can be applied in various systems, particularly in applications where board space is limited. It is ideal for mobile and hand-held devices like tablet PCs and smartphones. Due to its high operating frequency and integrated frequency compensation, the standard external components are highly reduced, providing a synchronized low cost, high efficiency solution for DC/DC conversion. The LT3999EDD#TRPBF is also popularly used in applications such as servers, controllers, cloud computing equipment, motor control, digital-analog converters, telecoms equipment, office peripherals and industrial systems, where high efficiency and reliability are paramount.In conclusion, the LT3999EDD#TRPBF is a high frequency synchronous switching regulator that offers efficient, reliable and cost effective voltage conversion. It is highly compact, comprising of a single chip, hence taking up less board space. The synchronous operating mode reduces the switching losses and output voltage ripple, making it ideal for applications requiring low output voltage ripple such as motor control and digital-analog converters. All these features make the LT3999EDD#TRPBF a versatile voltage regulator for various applications.

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