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LM338T
+BOMIC REG LINEAR POS ADJ 5A TO220-3
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メーカーSTマイクロエレクトロニクス
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メーカー品番 #LM338T
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データシート LM338T DataSheet
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在庫状況5875
365 日間品質保証
7*24 日間の品質保証
90-時間単位のサービス保証
1日間のアフターサービス保証
仕様
| 属性 | 値 |
| Part Status | Obsolete |
| Base Product Number | LM338 |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 40V |
| Voltage - Output (Min/Fixed) | 1.24V |
| Voltage - Output (Max) | 32V |
| Current - Output | 5A |
| PSRR | 75dB ~ 60dB (120Hz) |
| Protection Features | Over Temperature, Short Circuit |
| Operating Temperature | 0°C ~ 125°C |
| Mounting Type | Through Hole |
| Package | TO-220-3 |
| Supplier Device Package | TO-220-3 |
| Packaging | Tube |
概要
Description
The LM338T is typically housed in a TO-220 package, making it suitable for applications needing a robust power supply. It features a dropout voltage of about 3 volts and can be used in a variety of applications, including adjustable power supplies, battery chargers, and constant current regulators.
Its ease of use, requiring only two external resistors to set the output voltage, and its ability to handle significant power dissipation make it a popular choice for both hobbyists and professionals in electronics. This regulator is ideal for those requiring a reliable yet straightforward solution for voltage regulation needs.
Equivalent
Features
1. Adjustable Output Voltage: It provides an output voltage range from 1.2V to 32V.
2. Current Capability: It can deliver a continuous output current of up to 5A.
3. Thermal Overload Protection: The device includes thermal regulation to protect against overheating.
4. Short-Circuit Protection: It features current limiting to safeguard against short circuits.
5. Safe Operating Area Protection: Ensures safe operation even during overload conditions.
6. Low Dropout Voltage: Typically around 3V, allowing it to regulate even when the input voltage is close to the output.
7. Easy to Use: Requires only two external resistors to set the output voltage.
8. Versatile Application: Suitable for a wide range of applications including power supplies and battery chargers.
9. TO-220 Package: The LM338T is typically available in a TO-220 package, which provides efficient heat dissipation.
Overall, the LM338T is a reliable and robust component for power regulation needs.
Pinout
1. Pin 1 (Adjust): This pin is used to adjust the output voltage. By connecting it to a voltage divider from the output to ground, you can set the desired output voltage.
2. Pin 2 (Output): This is the regulated output voltage pin. It is connected to the load. The output voltage is controlled by the voltage divider connected to the adjust pin.
3. Pin 3 (Input): This is the unregulated input voltage pin. The input voltage should be higher than the desired output voltage by at least 3V for proper regulation.
The LM338T is widely used in applications requiring high current and adjustable voltage, such as power supply designs and battery chargers.
Manufacturer
Application
Package
Frequently Asked Questions
Q: What is the maximum input voltage for the LM338T?
A: The maximum input voltage is 40V, as specified for this adjustable positive voltage regulator.
Q: Can the LM338T output a fixed voltage?
A: No, it provides an adjustable output from 1.24V to 32V, requiring external resistors to set the voltage.
Q: What is the maximum output current of the LM338T?
A: It can deliver up to 5A of output current, suitable for medium-power applications.
Q: What protection features does the LM338T include?
A: It includes over-temperature protection and short circuit protection for reliable operation.
Q: What is the operating temperature range for the LM338T?
A: It operates from 0°C to 125°C, making it suitable for commercial-grade environments.
Q: Is the LM338T available in a surface-mount package?
A: No, it comes in a TO-220-3 through-hole package, designed for heatsink mounting.
Q: What is the typical PSRR performance at 120Hz?
A: The PSRR is 75dB to 60dB at 120Hz, ensuring good ripple rejection in power supply designs.