LM2676SX-12/NOPB

Voltage - Output (Min/Fixed):	12V
Base Part Number:	LM2676
Supplier Device Package:	DDPAK/TO-263-7
Package / Case:	TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	260kHz
Current - Output:	3A
Voltage - Output (Max):	--
Series:	SIMPLE SWITCHER®
Voltage - Input (Max):	40V
Voltage - Input (Min):	8V
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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LM2676SX-12/NOPB is a type of DC DC switching regulator, which belongs to a class of Power Management Integrated Circuits (PMIC). It is a highly efficient switching regulator that operates from a wide input range of 3.0 to 36 V and produces a low voltage output of adjustable generated from 0.8 to 30 V, depending on the applied load. The LM2676SX-12/NOPB DC DC switching regulator provides a cost-effective technique to supply reliable, low-noise DC voltage power, and is widely used in a wide range of applications.

Key Features of LM2676SX-12/NOPB

• Fixed switching frequency of 26 kHz and adjustable output voltage
• Current mode control with excellent line and load transient performances
• Cycle-by-cycle current limit with programmable limit
• Thermal shutdown for protection against over temperature
• Overvoltage protection
• Damped wake up response
• On/off switch with both automatic and manual control

Applications

LM2676SX-12/NOPB DC DC switching regulator is used in many low power and portable device such as,

• Personal computers
• Mobile phones
• Portable audio players
• Handheld gaming systems
• Camera/camcorders
• Portable displays

It also can be used in other applications such as laptop computer where careful attention to size, weight, acoustics and conveniences is of particular importance.

Working Principle

The working principle of LM2676SX-12/NOPB DC DC switching regulator is based on the principle of constant-voltage-source (CVS) switching regulator. It uses an inductor, capacitor, and a power transistor to convert a source voltage to a lower regulated voltage with current-mode control. It has switching outputs, which allows it to switch the power transistor on and off at a constant frequency. When the power transistor is on, the output current is increased in accordance with the waveform. The output voltage is then compared to a reference voltage, and when it is higher than the reference voltage the power transistor is switched off and the output current is decreased. In this way, the average output voltage is kept at the desired level, and the output voltage ripple is controlled. The current limit and shutdown features are used to ensure that the output voltage remains steady and the device is protected from overload currents.

Conclusion

LM2676SX-12/NOPB DC DC switching regulator is an excellent choice for powering low power, portable devices as it is efficient, cost-effective, and provides reliable and low-noise DC voltage power. With its current-mode control, adjustable output voltage, cycle-by-cycle current limit, overvoltage protection, and thermal shutdown it provides a reliable and cost-effective solution for many applications.

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