
Allicdata Part #: | LM2678S-ADJ/NOPB-ND |
Manufacturer Part#: |
LM2678S-ADJ/NOPB |
Price: | $ 4.35 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Texas Instruments |
Short Description: | IC REG BUCK ADJ 5A TO263-7 |
More Detail: | Buck Switching Regulator IC Positive Adjustable 1.... |
DataSheet: | ![]() |
Quantity: | 1301 |
1 +: | $ 3.95640 |
10 +: | $ 3.57588 |
100 +: | $ 2.96050 |
500 +: | $ 2.57796 |
1000 +: | $ 2.24532 |
Voltage - Output (Min/Fixed): | 1.21V |
Base Part Number: | LM2678 |
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: | 5A |
Voltage - Output (Max): | 37V |
Series: | SIMPLE SWITCHER® |
Voltage - Input (Max): | 40V |
Voltage - Input (Min): | 8V |
Number of Outputs: | 1 |
Output Type: | Adjustable |
Topology: | Buck |
Output Configuration: | Positive |
Function: | Step-Down |
Part Status: | Active |
Packaging: | Tube |
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LM2678S-ADJ/NOPB is a monolithic buck converter which is classified under a variety of applications. It is a DC-DC switching regulator designed to provide efficient and accurate control of voltages from as low as 3.5 V to as high as 24 V. With its high performance and reliability, LM2678S-ADJ/NOPB has become a popular choice for a wide range of power management needs.
The LM2678S-ADJ/NOPB features a fixed operating frequency of 200kHz and peak-to-peak pulse frequency variation (PFM) of up to 12.5%. This buck regulator takes off the voltage spikes created by changing load conditions, thus, it is capable of providing up to 94% efficiency and offers excellent line and load regulation. The device also features an internal frequency compensation loop, under voltage lockout with hysteresis (UVLO), adjustable soft-start and a long package that allows it to easily operate in a variety of environments.
The LM2678S-ADJ/NOPB is a highly versatile device suitable for powering any system from a source ranging from any battery, photovoltaic panel, or AC line. The device is designed for all switching applications and it can be used for anything from computers, TVS, motor controllers, to solar and wind energy systems, among many others.
In terms of its working principle, the LM2678S-ADJ/NOPB is designed as a linear regulator. This means that it contains a voltage regulator which supplies a fixed, stable output voltage. The regulator operates in two modes, which are: pulse-width modulation (PWM) and pulse-frequency modulation (PFM). The PWM mode is enabled at low load levels, whilst the PFM mode is enabled at higher load levels.
The regulator in the LM2678S-ADJ/NOPB continually monitors the input voltage and output voltage. When the input voltage is greater than the output voltage, it forces more current to flow through the load, increasing the output voltage as a result. Likewise, when the input voltage is lower than the output voltage, it reduces the current flow, thus reducing the output voltage.
The LM2678S-ADJ/NOPB regulator uses Pulse Frequency Modulation (PFM) to maintain a constant output voltage while providing high efficiency and low output ripple. In this mode, the regulator will continuously manipulate the output voltage by altering the frequency and pulse width of the input voltage. The pulse width of the input voltage is varied according to the load current, while the frequency is adjusted according to the input voltage and the output voltage. This makes the LM2678S-ADJ/NOPB an excellent choice for any system that needs a reliable, stable, and efficient power source.
Overall, the LM2678S-ADJ/NOPB is an ideal device for a wide variety of power management applications. With its highly efficient design and low output ripple, this device is the perfect choice for powering a variety of electronics. The device is also easy to design in, making it an attractive choice for engineers who need a reliable and efficient power source.
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