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LM337LM
+NomenclatureIC REG LIN NEG ADJ 100MA 8SOIC
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FabricantTexas Instruments
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Pièce fabricant #LM337LM
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Package SOIC-8
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En stock2615
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Spécifications
| Attribut | Valeur |
| Package / Case | Bulk |
| Part Status | Not For New Designs |
| Output Configuration | Negative |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | -40V |
| Voltage - Output (Min/Fixed) | -1.2V |
| Voltage - Output (Max) | -37V |
| Current - Output | 100mA |
| PSRR | 60dB (120Hz) |
| Protection Features | Over Temperature, Short Circuit |
| Operating Temperature | -25°C ~ 125°C |
| Mounting Type | Surface Mount |
Présentation
Description
Key features of the LM337LM include thermal overload protection, short-circuit protection, and safe area compensation, which enhance its reliability and robustness. The regulator requires only two external resistors to set the output voltage, making it easy to implement in various circuit designs. Its relatively simple design and broad input voltage range make it suitable for numerous applications.
The LM337LM is typically available in a TO-220 or SOP-8 package, offering flexibility in terms of mounting and design configurations. Its ease of use, combined with its stability and protection features, make it a popular choice for negative voltage regulation needs.
Equivalent
Features
1. Adjustable Output Voltage: The LM337 can provide an output voltage range from -1.25V to -37V by using a resistor divider network.
2. Output Current: It can deliver a maximum output current of 1.5A, allowing it to power moderate loads.
3. Thermal Overload Protection: This feature protects the device from overheating by shutting it down if the temperature exceeds a safe limit.
4. Short-Circuit Protection: It includes robust protection against short-circuit conditions to prevent damage to the regulator and the circuit.
5. Safe Operating Area (SOA) Protection: Ensures reliable operation by keeping the device within safe limits under various operating conditions.
6. Low Dropout Voltage: The regulator operates with a low dropout voltage, enhancing efficiency.
Overall, the LM337 is a reliable component for applications requiring adjustable negative voltage regulation.
Pinout
1. Pin Count: 3 pins.
2. Pin Functions:
- Pin 1 (Adjust): Used to adjust the output voltage. The output voltage is set by connecting this pin through a resistor divider network to the output pin.
- Pin 2 (Output): Provides the regulated negative output voltage, which can be adjusted to a range typically from -1.2V to -37V.
- Pin 3 (Input): Connects to the unregulated input voltage. The input voltage must be more negative than the desired output voltage by a certain dropout margin to ensure proper regulation.
The device is primarily used for applications requiring a stable and adjustable negative voltage, such as power supplies or operational amplifier circuits.
Manufacturer
Application
1. Variable Power Supplies: Used for creating adjustable negative voltage outputs.
2. Battery Chargers: Provides regulated charging voltage, ensuring battery longevity.
3. Operational Amplifier Circuits: Supplies negative voltage rails for dual-supply op-amp circuits.
4. Test Equipment: Offers precision voltage control for testing and measurement devices.
5. Communication Devices: Ensures stable power supply for analog and RF circuits.
Overall, the LM337LM is utilized in circuits requiring reliable negative voltage regulation with a wide range of output adjustability.