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LM3940IS-3.3/NOPB
LDO Voltage Regulators 1A LDO REG
LM3940IS-3.3/NOPB
LDO Voltage Regulators 1A LDO REG
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Manufacturer Part # : LM3940IS-3.3/NOPB
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Package/Case: TO263-3
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Brand: Texas Instruments
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Product Categories : Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
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About After Sales Service
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Initiate the application within 90 days from the shipment date.
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LM3940IS-3.3/NOPB DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
The LM3940IS-3.3/NOPB is a versatile low-dropout regulator that is perfect for applications requiring a stable 3.3 V output from a 5 V supply. With a maximum load capacity of 1 A, this regulator is ideal for systems with both 5 V and 3.3 V components, making it a convenient power solution for various electronic devices
Key Features
- Improved Efficiency Performance
- Precise Output Control
- Robust Overvoltage Protection
- Wide Input Voltage Range
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Output options | Fixed Output | Iout (max) (A) | 1 |
| Vin (max) (V) | 5.5 | Vin (min) (V) | 4.5 |
| Vout (max) (V) | 3.3 | Vout (min) (V) | 3.3 |
| Fixed output options (V) | 3.3 | Noise (µVrms) | 150 |
| Iq (typ) (mA) | 0.11 | Thermal resistance θJA (°C/W) | 23 |
| Rating | Catalog | Load capacitance (min) (µF) | 33 |
| Regulated outputs (#) | 1 | Accuracy (%) | 2.5 |
| PSRR at 100 KHz (dB) | 32 | Dropout voltage (Vdo) (typ) (mV) | 310 |
| Operating temperature range (°C) | -40 to 125 |
FAQs
What is LM3940IS-3.3/NOPB?
The LM3940IS-3.3/NOPB is a low-dropout voltage regulator designed by Texas Instruments. It is a 3.3V fixed-output voltage regulator capable of delivering up to 1A of output current. This regulator is ideal for powering sensitive analog circuits, microcontrollers, and other electronic devices that require a stable and precise 3.3V power supply.
How Does LM3940IS-3.3/NOPB Work?
The LM3940IS-3.3/NOPB works by regulating an input voltage to a stable 3.3V output using a low-dropout voltage regulator architecture. It maintains a constant output voltage despite variations in the input voltage and load conditions, ensuring a steady power supply for the connected circuitry. The device operates with minimal dropout voltage, making it efficient for low-voltage applications.
How Many Pins does LM3940IS-3.3/NOPB have and What are the Functions of the Pinout Configuration?
The LM3940IS-3.3/NOPB is housed in a 3-pin TO-263 package. The pinout configuration includes:
- VIN: Input voltage pin.
- VOUT: Regulated 3.3V output voltage pin.
- GND: Ground pin.
What are the Pros and Cons of LM3940IS-3.3/NOPB?
Pros:
- Low Dropout Voltage: Operates with minimal dropout voltage, suitable for low-input voltage applications.
- High Output Current: Capable of delivering up to 1A of output current.
- Thermal Shutdown: Includes built-in thermal shutdown protection for overtemperature conditions.
- Simple Design: Requires minimal external components for stable operation.
- Short Circuit Protection: Provides short circuit current limit protection.
Cons:
- Heat Dissipation: May require a heat sink for high-power dissipation applications.
- Fixed Voltage: The output voltage is fixed at 3.3V and cannot be adjusted.
- Package Size: The TO-263 package may be larger compared to other surface-mount packages.
Are There Any Equivalents/Alternatives to LM3940IS-3.3/NOPB for Recommendation?
Equivalents to the LM3940IS-3.3/NOPB include the MIC5209 from Micrel and the LT1761 from Analog Devices. Alternatives to consider are the LM2937-3.3 from Texas Instruments and the MAX8887 from Maxim Integrated.
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