LM2663M

Voltage - Output (Min/Fixed):	-Vin, 2Vin, Vin/2
Base Part Number:	LM2663
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	10kHz, 75kHz
Current - Output:	200mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	1.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Positive or Negative
Function:	Ratiometric
Part Status:	Not For New Designs
Packaging:	Tube

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LM2663M Application Field and Working PrincipleThe LM2663M family of integrated DC/DC switching regulators is a voltage-regulating product line from National Semiconductor, suitable for a broad range of electronic applications. The integrated regulator provides a cost-effective, space-efficient means of providing regulated 5V, 3V, and adjustable outputs to a variety of devices requiring different voltage levels.The key features of the LM2663M family include output voltage range of up to 9.5V, an adjustable output voltage of 2.5V to 28.0V, built-in soft start and precision disable threshold, as well as adjustable charge pump current limiting. Additionally, the family carries a 200mA, DC/DC step-down regulator and dual-mode interface for a precise control of the output voltage. All of these features make the LM2663M family suitable for the powering of various types of electronic devices such as commercial and telecom equipment, industrial systems, and consumer electronics.The LM2663M family is made up of several ICs, each IC specializing in different applications and providing specific features. The LM2663MM-5V is designed to provide a +5V regulated output voltage with a 1.2V to 5.5V input voltage; while the LM2663MM-3V is designed to provide a +3V regulated output voltage with a 1.2V to 5.5V input voltage. Additionally, the LM2663MM-Adj provides an adjustable regulated output voltage of 2.7V to 28.0V with a 1.2V to 30V input voltage.At the heart of the LM2663M family is an integrated switching regulator controller, a step-down, DC/DC regulator. It controls the output voltage through the switching of a buck MOSFET, a process that switches the current from input to output. The regulator monitors the output voltage and then adjusts the switching frequency accordingly to maintain the desired output voltage.Additionally, this regulator utilizes a feature called “Soft Start.” This feature increases the average output current over a period of time, allowing the components in the system to be stress-free during start-up. The LM2663M family also has an adjustable charge pump current-limiting feature to help control the output current under overload conditions.In order to increase safety and performance, the LM2663M family incorporates protection circuits to mitigate problems caused by over-temperature, over-current, and under-voltage conditions. This family also offers a “dual-mode interface” which can be used to adjust the output voltage and monitor the output voltage of the system in real-time.Overall, the LM2663M family provides a cost-effective, space-efficient solution for regulating supply voltages for various types of electronic devices. Its integrated switching regulator controller and protection circuits delivers precise control of the output voltage and offers the flexibility to adapt to the needs of various applications.

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