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LM317D2T
+NomenclatureIC REG LINEAR POS ADJ 1.5A D2PAK
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FabricantSemi - conducteurs optiques
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Pièce fabricant #LM317D2T
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Package TO-263-3
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En stock3705
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Spécifications
| Attribut | Valeur |
| Package / Case | Tube |
| Part Status | Obsolete |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 40V |
| Voltage - Output (Min/Fixed) | 1.2V |
| Voltage - Output (Max) | 37V |
| Current - Output | 1.5A |
| PSRR | 80dB ~ 65dB (120Hz) |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Operating Temperature | 0°C ~ 125°C |
| Mounting Type | Surface Mount |
Présentation
Description
The LM317D2T is housed in a TO-263 surface-mount package, which is suitable for applications where space is limited. Its ease of use is notable; users typically need two external resistors to set the output voltage. Additionally, due to its robust design, it is used in applications ranging from consumer electronics to industrial equipment. The device's versatility and reliability make it a popular choice for engineers and hobbyists alike when designing adjustable power supply circuits.
Equivalent
1. LM317T: Popular variant with similar characteristics.
2. LM317M: Medium power version.
3. L78S05CV: Fixed 5V version with similar functionality.
4. MC7805CT: Fixed voltage alternative.
5. NTE956: Adjustable regulator replacement.
These alternatives may vary in packaging and specifications, so verify compatibility with your application requirements.
Features
1. Adjustable Output Voltage: It provides an output voltage range from 1.25V to 37V, allowing for flexibility in various applications.
2. Output Current: The device can deliver output current up to 1.5A, making it suitable for powering a range of devices.
3. Line Regulation: Offers excellent line regulation, typically 0.01%/V, ensuring consistent performance with varying input voltages.
4. Load Regulation: Features good load regulation, typically 0.1%, maintaining stable output under different load conditions.
5. Thermal Overload Protection: Includes built-in thermal overload protection to prevent damage from overheating.
6. Current Limit Protection: Offers current limit protection, safeguarding the device and connected components from excessive current.
7. Safe Area Protection: Contains safe area protection for further device security.
8. Temperature Range: Operates over a wide temperature range, typically from -40°C to +125°C, suitable for diverse environments.
9. Dropout Voltage: Features a dropout voltage of around 3V, which is the minimum difference between input and output voltage for proper regulation.
These features make the LM317D2T a reliable choice for various power management applications.
Pinout
The pins are as follows:
1. Input (IN): This pin receives the input voltage, which should be higher than the desired output voltage by at least 3V to ensure proper regulation.
2. Output (OUT): This pin provides the regulated output voltage. The voltage level is determined by the resistor network connected between the output and adjust pins.
3. Adjust (ADJ): This pin is used to set the output voltage. A resistor divider network is connected between the output and the adjust pin, which allows the output voltage to be set according to the formula: Vout = 1.25V * (1 + R2/R1) + Iadj * R2, where Iadj is typically very small and can often be neglected.
This configuration allows the LM317D2T to serve as a versatile and widely-used adjustable voltage regulator in various electronic applications.