LTC3618IUF#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Applications:	Converter, DDR
Voltage - Input:	2.25 V ~ 5.5 V
Number of Outputs:	2
Voltage - Output:	Adj to 0.6V
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	24-WFQFN Exposed Pad
Supplier Device Package:	24-QFN (4x4)
Base Part Number:	LTC3618

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LTC3618IUF#TRPBF Application Field and Working Principle

The LTC3618IUF#TRPBF is a special purpose voltage regulator engineered and produced by Linear Technology Corporation. It is designed to meet the requirements of portable and battery-powered applications. It is specifically designed for modern point-of-load (POL) power designs, enabling power supply architectures for components such as microprocessors, DSPs, memories, FPGAs, and ASICs.The LTC3618IUF#TRPBF is a single cell synchronous rectifier buck regulator with integrated MOSFETs, low-side gate drivers, an internal oscillator, and a shutdown input. It features an adjustable output voltage range from 0.6V to 6V, a maximum output current of 3A, and an integrated 2%, 0.5mV voltage reference. It operates over a wide input voltage range of 2.3V to 5.5V. The device also includes adjustable soft-start time and a power good output to indicate when the output voltage is within regulation.

Working Principle of LTC3618IUF#TRPBF

The LTC3618IUF#TRPBF uses a buck converter topology to regulate the output voltage and current. A synchronous buck converter is a type of DC-DC converter that uses two switches, one for the power switch, and one for the synchronous rectifier. The power switch is a MOSFET, which is driven by an internal oscillator to form a voltage ramp. When the voltage ramp reaches the set reference voltage, the MOSFET turns off. At the same time, the synchronous rectifier MOSFET turns on and the inductor current is forced in a reverse direction. This reverse flow continues until the voltage ramp reaches the set reference voltage and the synchronous rectifier MOSFET turns off.The LTC3618IUF#TRPBF has an adjustable current limit, as well as multiple protection features, such as over temperature, under voltage lock out (UVLO). The device also includes a power good output to indicate when the output voltage is within regulation.

Applications of LTC3618IUF#TRPBF

The LTC3618IUF#TRPBF is designed for portable and battery-powered applications. Its features make it ideal for modern point-of-load (POL) power designs for components such as microprocessors, DSPs, memories, FPGAs, and ASICs.The device is also well-suited for noise sensitive applications, due to its low output ripple, low-side gate drivers, and efficient switching frequency. Its wide input voltage range and adjustable output voltage range make it applicable to almost any battery-powered system. The LTC3618IUF#TRPBF also provides protection features such as an adjustable current limit, and over temperature, under voltage lock out (UVLO) protection.The device is also well-suited for multi-cell Li-ion and Li-polymer battery systems, as it provides adjustable soft-start time. Additionally, it is also well-suited for 5V and USB applications, due to its wide input voltage range.In conclusion, the LTC3618IUF#TRPBF is a special purpose voltage regulator designed for portable and battery-powered applications. It features an adjustable output voltage range from 0.6V to 6V, a maximum output current of 3A, and an integrated 2%, 0.5mV voltage reference. It is also equipped with protection features such as an adjustable current limit and over temperature, under voltage lock out (UVLO) protection. Additionally, it is well-suited for noise sensitive applications and modern point-of-load (POL) power designs.

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