National Semiconductor LM317H
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $62.12 | $62.12 |
| 15+ | $14.29 | $214.35 |
| 25+ | $13.98 | $349.50 |
| 50+ | $13.20 | $660.00 |
| 100+ | $11.65 | $1,165.00 |
| N+ | $2.33 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | |
| Packaging | Bulk | |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 40V |
| Voltage - Output (Min/Fixed) | 1.25V |
| Voltage - Output (Max) | 37V |
| Voltage Dropout (Max) | - |
| Current - Output | 1.5A |
| Current - Quiescent (Iq) | 10 mA |
| Current - Supply (Max) | - |
| PSRR | 80dB ~ 65dB (120Hz) |
| Control Features | - |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Operating Temperature | 0°C ~ 125°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | TO-205AD, TO-39-3 Metal Can |
| Supplier Device Package | TO-3 |
| ROHS |  |
The LM317H from National Semiconductor is a high-performance adjustable linear regulator delivering up to 1.5A with an output range of 1.25V to 37V. Encased in a TO-3 metal package, it offers superior thermal dissipation for demanding applications. With a PSRR of 80dB and low quiescent current, it ensures clean, stable power for audio, industrial, and laboratory equipment.
- High Current in TO-3: 1.5A capability with excellent heat sinking for continuous duty.
- Wide Voltage Range: 1.25V to 37V adjustable output covers most low-voltage applications.
- Superior Ripple Rejection: 80dB PSRR at 120Hz for noise-sensitive circuits.
- Low Quiescent Current: 10 mA minimizes power loss in battery-powered designs.
High-Current Adjustable Supply
Build a robust 1.5A adjustable power supply for hobbyist and lab use. The TO-3 package allows mounting on large heatsinks for continuous operation.
Audio Amplifier Power Stage
Supply clean DC rails to class-A or class-AB amplifiers. The 80dB PSRR at 120Hz ensures minimal hum and noise in the audio path.
Battery Management Systems
Use as a precision voltage source for battery charging or cell balancing circuits. The adjustable output matches various battery chemistries.
Test and Measurement Equipment
Provide stable reference voltages for multimeters, oscilloscopes, and signal generators. Low quiescent current (10 mA) maintains accuracy.
Industrial Power Distribution
Regulate 24V industrial supplies down to 5V or 3.3V for logic circuits. The TO-3 package handles high ambient temperatures.
Solar Charge Controllers
Regulate variable solar panel output to a stable voltage for battery charging. The wide input range accommodates changing sunlight conditions.
- Q: What is the output voltage range of the LM317H?
- A: The output voltage is adjustable from 1.25V to 37V.
- Q: What is the maximum output current?
- A: The maximum output current is 1.5A.
- Q: What is the input voltage range?
- A: The input voltage can be up to 37V, with a minimum of 1.25V above the output.
- Q: What is the dropout voltage?
- A: Dropout voltage is not specified; typical for LM317 series is ~2V at 1A.
- Q: What is the quiescent current?
- A: The quiescent current is 10 mA.
- Q: What package is available?
- A: The LM317H is available in a TO-3 package.
LM317H.pdf
- Q: What is the output voltage range of the LM317H?
- A: The output voltage is adjustable from 1.25V to 37V.
- Q: What is the maximum output current?
- A: The maximum output current is 1.5A.
- Q: What is the input voltage range?
- A: The input voltage can be up to 37V, with a minimum of 1.25V above the output.
- Q: What is the dropout voltage?
- A: Dropout voltage is not specified; typical for LM317 series is ~2V at 1A.
- Q: What is the quiescent current?
- A: The quiescent current is 10 mA.
- Q: What package is available?
- A: The LM317H is available in a TO-3 package.
