LT3663EMS8E-5#TRPBF

Voltage - Output (Min/Fixed):	5V
Base Part Number:	LT3663
Supplier Device Package:	8-MSOP-EP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	1MHz
Current - Output:	1.2A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	36V
Voltage - Input (Min):	7.5V
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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LT3663EMS8E-5#TRPBF: DC DC Switching Regulators Application Field & Working Principle

The LT3663EMS8E-5#TRPBF is an adjustable, synchronous, DC to DC buck regulator with an integrated high and low-side MOSFET. It is suitable for a wide range of applications including portable and industrial equipment. This low power device operates from an input voltage range of 4.5V to 20V, delivering an output voltage adjustable from 0.6V to 17V. The input voltage can range from 4.5V to 20V, and power up to 6A is supported.One of the advantages of this product is its low quiescent current – the LT3663EMS8E-5#TRPBF draws only 85µA, making it appropriate for energy sensitive applications. In addition, the device’s operating temperature range is -40ºC to +125ºC and PCB layout is easy, making it a good choice for high reliability and mission-critical applications. The LT3663EMS8E-5#TRPBF is a monolithic synchronous buck regulator featuring a wide input voltage range, high output current and fast transient response. It offers 5 modes of operation and includes on-chip soft-start and over voltage protection.The device is made with high-performance analog integrated circuit technology and has a Very High Frequency (VHF) current mode control architecture. This switch mode regulator can also be configured for fixed frequency or variable frequency operation with different external components.The LT3663EMS8E-5#TRPBF accepts pulse width modulated (PWM) input signals from 0 to 500kHz. The operational parameters such as dead time and switching frequency are programmable.The device has an adjustable soft-start mode for easy start-up and adjustable current limit for protection against overload. The LT3663EMS8E-5#TRPBF features a power-good signal to indicate when the output voltage is in its steady state, as well as output overvoltage protection.The LT3663EMS8E-5#TRPBF includes a 5mm x 7mm thermally enhanced, 24-pin Quad Flat No-Lead (QFN) package. This power device is specified for wireless and local area network (LAN) applications, as well as cell phones and other battery-powered devices.The LT3663EMS8E-5#TRPBF use Constant Frequency Current Mode Sync Buck Step-down Controller. This provides fast transient response and cycle-by-cycle current limit with no load detection. A 5V VSTOP signal at the VSTOP pin shuts down the internal MOSFET driver. This signal also serves to detect over-voltage conditions. Once the voltage exceeds the OVP level, the VSTOP signal is deactivated and the IC recovers from the over-voltage condition.Standard active loop compensation circuitry is included in the LT3663EMS8E-5#TRPBF. The compensation can also be customized by the user through Compensation voltage (COMP) pin. A unique feature of the LT3663EMS8E-5#TRPBF is its internal direct-drive leading-edge modulation scheme. This scheme allows the device to operate from very low input voltage without any external diode and can provide better EMI performance.The LT3663EMS8E-5#TRPBF offers a choice between a spreading spectrum modulator for improved EMI performance or a fixed frequency option for easier loop compensation. In addition, the device provides a thermal limit setting, which can be preset for improved power supply safety and efficiency.In summary, the LT3663EMS8E-5#TRPBF is an integrated synchronous step-down regulator with a wide range of features, including adjustable soft- start, over voltage protection, and very low quiescent current. It is suitable for multiple applications, including power conversion in both battery-operated and industrial systems, and comes in a 5mm x 7mm QFN package. With its efficient power management, superior transient response, adjustable soft-start, and high reliability, the LT3663EMS8E-5#TRPBF is a great addition to the DC-DC Switching Regulator family.

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