National Semiconductor LM137H
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $63.84 | $63.84 |
| 15+ | $14.68 | $220.20 |
| 25+ | $14.36 | $359.00 |
| 50+ | $13.57 | $678.50 |
| 100+ | $11.97 | $1,197.00 |
| N+ | $2.39 | Price Inquiry |
Request Quote / Inquiry
| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | |
| Packaging | Bulk | |
| Output Configuration | Negative |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | -40V |
| Voltage - Output (Min/Fixed) | -1.2V |
| Voltage - Output (Max) | -37V |
| Voltage Dropout (Max) | - |
| Current - Output | 1.5A |
| Current - Quiescent (Iq) | - |
| Current - Supply (Max) | - |
| PSRR | 66dB (120Hz) |
| Control Features | - |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Operating Temperature | -55°C ~ 150°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | TO-205AD, TO-39-3 Metal Can |
| Supplier Device Package | TO-3 |
| ROHS |  |
The LM137H from National Semiconductor is a negative adjustable linear regulator capable of delivering up to 1.5A with an output range down to -37V. Housed in a rugged TO-3 package, it offers excellent thermal performance and 66dB PSRR at 120Hz, making it a reliable choice for negative supply rails in audio, industrial, and test applications.
- High Negative Voltage Range: Adjustable down to -37V, covering a wide spectrum of negative supply needs.
- 1.5A Output Current: Sufficient for demanding loads in industrial and audio equipment.
- Excellent PSRR: 66dB at 120Hz minimizes mains ripple interference.
- Rugged TO-3 Package: Metal can construction ensures superior heat dissipation and durability.
Negative High-Voltage Supplies
The LM137H's ability to output up to -37V makes it suitable for biasing avalanche photodiodes or vacuum tube circuits requiring negative rails.
Audio Preamplifiers
With 66dB PSRR, it provides a clean negative supply for op-amps in high-end audio preamps, reducing hum and noise.
Industrial Process Control
Its 1.5A current capability and TO-3 package allow for robust negative supplies in PLCs and motor controllers.
Test Equipment Calibration
Adjustable output enables precise negative reference voltages for calibration instruments.
Telecom Line Drivers
Negative rails for line drivers and receivers in legacy telecom systems benefit from its low-noise regulation.
Power Supply Sequencing
Used in systems requiring a negative rail to be established before positive rails, ensuring proper IC startup.
- Q: What is the output voltage of the LM137H?
- A: It is a negative adjustable regulator with a maximum output of -37V.
- Q: What is the maximum output current?
- A: It can deliver up to 1.5A of output current.
- Q: What is the input voltage range?
- A: The minimum input voltage is -1.2V (relative to output); absolute maximum not specified.
- Q: What is the dropout voltage?
- A: Dropout voltage is not explicitly provided in the technical data.
- Q: What is the PSRR?
- A: PSRR is 66dB at 120Hz.
- Q: What package is available?
- A: It comes in a TO-3 metal can package.
LM137H.pdf
- Q: What is the output voltage of the LM137H?
- A: It is a negative adjustable regulator with a maximum output of -37V.
- Q: What is the maximum output current?
- A: It can deliver up to 1.5A of output current.
- Q: What is the input voltage range?
- A: The minimum input voltage is -1.2V (relative to output); absolute maximum not specified.
- Q: What is the dropout voltage?
- A: Dropout voltage is not explicitly provided in the technical data.
- Q: What is the PSRR?
- A: PSRR is 66dB at 120Hz.
- Q: What package is available?
- A: It comes in a TO-3 metal can package.
