LM2622MM-ADJ/NOPB

Voltage - Output (Min/Fixed):	1.26V
Base Part Number:	LM2622
Supplier Device Package:	8-VSSOP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	600kHz, 1.3MHz
Current - Output:	1A (Switch)
Voltage - Output (Max):	12V
Series:	--
Voltage - Input (Max):	12V
Voltage - Input (Min):	2V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Active
Packaging:	Tape & Reel (TR)

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IntroductionThe LM2622MM-ADJ/NOPB is a DC/DC synchronous step-down switching regulator. It features a 3-AM·V input operating range, an integrated 1.2 A switch and an integrated voltage reference. The regulator can provide a fixed output voltage of 1.0 V to 5.5 V and is available in an 8-pin SOIC package. The LM2622MM-ADJ/NOPB is an ideal solution for general power and regulated power conversions, tracking, sequencing and LED lighting applications.Application FieldThe LM2622MM-ADJ/NOPB is designed to provide point-of-load regulation for board level power and space-efficient regulated power for applications such as general-purpose computing, point-of-load power, digital and analog signal processing, power management, digital telecommunications, as well as any application requiring regulated power.The LM2622MM-ADJ/NOPB is also suitable for LED lighting applications. It operates in both continuous and discontinuous conduction modes and supports a variety of LED lighting topologies, including constant voltage and constant current drive. The LED current can be programmed using the RT pin, or an external sense resistor.The output voltage of the LM2622MM-ADJ/NOPB can be adjusted using an external voltage reference or voltage divider. It also features an adjustable soft start which allows for a configurable output inrush current limit and supports a wide selection of inductive and ceramic output capacitors.Working PrincipleThe LM2622MM-ADJ/NOPB works by converting an unregulated input voltage to a regulated output voltage. The input voltage is applied to the input capacitor and then to the power MOSFET switch. The switch is controlled by a pulse-width modulation (PWM) signal generated by the IC. The PWM signal regulates the duty cycle of the switch, which in turn controls the amount of current that flows into the output capacitor and ultimately to the output.The output voltage is determined by the ratio of the output capacitor and feedback resistor values. When the output voltage is higher or lower than the desired value, the LM2622MM-ADJ/NOPB senses it and adjusts the PWM signal to compensate and bring the output voltage back to the desired value.ConclusionThe LM2622MM-ADJ/NOPB is a DC/DC synchronous step-down switching regulator with a 3-amp input voltage range. It is suitable for general power and regulated power conversions, tracking, sequencing and LED lighting applications. The output voltage of the LM2622MM-ADJ/NOPB can be adjusted using an external voltage reference or voltage divider and the device supports a variety of LED lighting topologies. The working principle of the regulator is based on the conversion of an unregulated input voltage to a regulated output voltage via a pulse-width modulation signal.

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