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Name: LM2672M-ADJ
Brand: National Semiconductor
SKU: LM2672M-ADJ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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National Semiconductor LM2672M-ADJ

Part No.:: LM2672M-ADJ

Manufacturer:: National Semiconductor

Package:: 8-SOIC (0.154, 3.90mm Width)

Datasheet:: LM2672M-ADJ.pdf

Description:: SWITCHING REG, VOLTAGE-MODE, 2.2

In Stock:: 2480

Quantity:: Add To Cart

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LM2672M-ADJ Specifications

Packaging:
Bulk
Series:
SIMPLE SWITCHER®
ProductStatus:
Active
Function:
Step-Down
OutputConfiguration:
Positive
Topology:
Buck
OutputType:
Adjustable
NumberofOutputs:
1
Voltage-Input(Min):
6.5V
Voltage-Input(Max):
40V
Voltage-Output(Min/Fixed):
1.21V
Voltage-Output(Max):
37V
Current-Output:
1A
Frequency-Switching:
260kHz
SynchronousRectifier:
No
OperatingTemperature:
-40°C ~ 125°C (TJ)
MountingType:
Surface Mount

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LM2672M-ADJ information

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LM2672M-ADJ Typical application Circuitry

LM2672M-ADJ

The LM2672M-ADJ is a member of the LM2672 family, which is a series of easy-to-use, 3A step-down voltage regulators. These regulators were made with the intention of making the power supply design simpler by lowering the number of external components.

Application Scenarios: The LM2672M-ADJ is highly versatile, finding its way into a plethora of applications such as:

- Battery-powered devices, where efficient power conversion is paramount.

- Portable electronics that require compact and efficient voltage regulation.

- Standalone power supplies for isolated electronic components.

- Industrial machinery that necessitates precise and adjustable voltage supplies.

Main Parameters:

1. Output Voltage: For the LM2672M-ADJ variant, the output voltage is adjustable, typically ranging from 1.21V to 37V.

2. Efficiency: The chip boasts high efficiency, often exceeding 90%, making it a solid choice for battery-operated devices.

3. Switching Frequency: It operates at a fixed frequency of 260 kHz, allowing for smaller-sized external inductors and capacitors.

4. Protection Features: It has built-in features like thermal shutdown, current limiting, and output over-voltage protection.

Circuit Connection:

Consider using the LM2672M-ADJ in a battery-operated portable device requiring an adjustable output voltage:

1. Input Supply: Connect the input voltage (which can range from 8V to 40V) to the VIN pin (Pin 5). Ensure the GND pin (Pin 2) is connected to the system ground.

2. Output Voltage Setup: To set the desired output voltage, connect a resistor (R1) between the output voltage pin (VOUT, Pin 4) and the feedback pin (FB, Pin 1). A second resistor (R2) should be connected between the FB pin and the system ground. The output voltage can be calculated using the formula: Vout = 1.21 * (1 + R1/R2).

3. Switching Node: The SW pin (Pin 3) should be connected to one end of an external inductor (L), with the other end tied to the output voltage. This inductor plays a pivotal role in the step-down conversion.

4. Output Filtering: Connect a capacitor (Cout) between the VOUT pin and system ground to filter out any noise and ripple. This capacitor also helps stabilize the output voltage.

Design Considerations:

1. Component Selection: Given the LM2672M-ADJ's switching nature, choosing low ESR (equivalent series resistance) capacitors can drastically improve performance and reduce output voltage ripple.

2. Heat Dissipation: If the device is working under high loads or the input-output voltage difference is considerable, the LM2672M-ADJ can get warm. Providing proper thermal management, like heat sinks or thermal vias, is advisable.

3. Inductor Value: The performance and effectiveness of the regulator can be affected by the selection of the inductor. Generally, a value between 22µH to 68µH suffices for most applications.

4. Layout: Minimize trace lengths, especially in the feedback network, to avoid unwanted noise or oscillations. You must have a strong ground plane.

In essence, the LM2672M-ADJ provides a blend of simplicity, versatility, and efficiency, making it an ideal choice for a variety of voltage regulation tasks. Whether it's for a compact battery-driven gadget or an industrial tool, the LM2672M-ADJ stands as a stalwart in voltage regulation, assuring consistent performance with minimal external components. Its efficiency and dependability can be further increased by paying careful attention to component selection and circuit arrangement.

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6. What is the process for return or replacement of LM2672M-ADJ?

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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of LM2672M-ADJ.

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