LMS3635LQRNLRQ1

Voltage - Input (Max):	36V
Supplier Device Package:	22-VQFN-HR (5x4)
Package / Case:	22-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	250kHz ~ 500kHz
Current - Output:	3.5A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Series:	Automotive, AEC-Q100
Voltage - Input (Min):	3.9V
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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LMS3635LQRNLRQ1 Application Field and Working PrincipleDC/DC switching regulators are one of the most common types of voltage regulators used today due to their high efficiency, small size, and low power consumption. The LMS3635LQRNLRQ1 is an ultra-low power DC/DC breakout board from Linear Tech, Inc. that is used in portable power applications such as portable media players. This board features a wide output voltage range (1.8V-5.5V), high switching frequency (1MHz), and programmable soft start.The LMS3635LQRNLRQ1 consists of two main sections. The first is a high-efficiency DC/DC buck converter, which provides a regulated DC voltage output. The second is a low-side MOSFET switch which enables forced-PWM or pulse-skipping operation for improved efficiency and EMI performance.The buck converter operates by taking an input voltage, typically from a battery, and converting it into a regulated output voltage using an inductor-capacitor (LC) filter. A pulse width modulated (PWM) signal is used to control the switch, allowing the output voltage to be precisely regulated. Half-bridge mode switching is also available for high-efficiency designs.Forced-PWM operation, or forced-on PWM operation, is a method of operating the switch which allows the output voltage to remain at a constant level regardless of load variations. The load is connected directly to the output of the DC/DC converter, while the switch is connected in parallel with the inductor. Whenever the load decreases, the switch will open, allowing current to flow through the inductor, dropping the output voltage. When the load increases, the switch will close and current will be forced through the load. This ensures that the output voltage remains within an acceptable range.Pulse-skipping operation is used when a particularly high efficiency is required. It works by the switch varying the on-time such that it will skip pulses when the load is particularly light, leading to a higher efficiency.Overall, the LMS3635LQRNLRQ1 breakout board is a great and simple solution for low-power DC/DC applications. It offers high efficiency, wide voltage range and programmable soft start, making it ideal for portable and battery-operated applications.

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