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Name: LM2733XMF
Brand: National Semiconductor
SKU: LM2733XMF
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 LM2733XMF

Part No.:: LM2733XMF

Manufacturer:: National Semiconductor

Package:: SC-74A, SOT-753

Datasheet:: LM2733XMF.pdf

Description:: SWITCHING REG, CURRENT-MODE, 1.5

In Stock:: 287

Quantity:: Add To Cart

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LM2733XMF Specifications

Packaging:
Bulk
Series:
-
ProductStatus:
Active
Function:
Step-Up
OutputConfiguration:
Positive
Topology:
Boost
OutputType:
Adjustable
NumberofOutputs:
1
Voltage-Input(Min):
2.7V
Voltage-Input(Max):
14V
Voltage-Output(Min/Fixed):
2.7V
Voltage-Output(Max):
40V (Switch)
Current-Output:
1A (Switch)
Frequency-Switching:
1.6MHz
SynchronousRectifier:
No
OperatingTemperature:
-40°C ~ 125°C (TJ)
MountingType:
Surface Mount

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LM2733XMF information

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LM2733XMF Typical application Circuitry

LM2733XMF

The LM2733XMF is a high-frequency, step-up (boost) DC-DC switching regulator designed for efficient power conversion in various electronic applications.

Application Scenarios: The LM2733XMF is commonly used in portable devices, LED drivers, bias supplies, and any application requiring a compact, efficient boost converter.

Key Features: This regulator features a wide input voltage range, adjustable output voltage, high switching frequency (up to 3 MHz), and internal compensation, making it suitable for small form-factor designs.

Circuit Design Example – Portable Device Power Supply:

1. Power Supply Connection: Connect a battery or other power source (e.g., 2.7V to 5.5V) to pin 5 (VIN) of the LM2733XMF.

2. Grounding: Connect pin 2 (GND) of the LM2733XMF to the circuit's ground for stable operation.

3. Output Voltage Setup: Connect a feedback resistor divider network from the output (pin 4, SW) to pin 3 (FB) to set the desired output voltage. The output voltage is determined by the resistor values according to the formula: Vout = 0.8V * (1 + R1/R2), where 0.8V is the reference voltage.

4. Inductor Connection: Connect an inductor between pin 4 (SW) and the positive side of the output capacitor. Choose an inductor value based on the desired output current and switching frequency.

5. Output Capacitor: Connect an output capacitor between the output voltage node and ground to filter the output and provide stability.

6. Input Capacitor: Place a capacitor between pin 5 (VIN) and ground to stabilize the input voltage and reduce noise.

7. Bypass Capacitor for Stability: It's recommended to place a small bypass capacitor (e.g., 0.1μF) close to the IC between pin 5 (VIN) and pin 2 (GND) to ensure stability.

Design Considerations: When designing a circuit with the LM2733XMF, consider the input voltage range, desired output voltage, load current requirements, and component selection for the inductor and capacitors. Check to see if the components you have chosen can manage the necessary current levels and the high switching frequency.

In conclusion, where small, effective voltage boosting is needed, the LM2733XMF is critical to applications such as portable device power supply. The architecture of the feedback network, component selection, and input-output parameters must all be carefully considered before implementing this circuit to ensure optimal performance.

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6. What is the process for return or replacement of LM2733XMF?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LM2733XMF we delivered, we will accept the replacement or return of the LM2733XMF only when all of the below conditions are fulfilled:

(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 LM2733XMF.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations