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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) 60V
Voltage - Output (Min/Fixed) 1.25V
Voltage - Output (Max) 57V
Voltage Dropout (Max) -
Current - Output 1.5A
Current - Quiescent (Iq) -
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-204AA, TO-3
Supplier Device Package TO-3-2

The LM317HVKSTEEL from National Semiconductor is a high-voltage adjustable linear regulator, delivering up to 1.5A with an output range from 1.25V to 57V. Its TO-3-2 metal package ensures excellent thermal performance for high-power applications. With PSRR of 80dB at 120Hz, it provides clean, stable power for audio, industrial, and telecom systems. This regulator is a robust choice for designs requiring high input voltages and precise output control.

  • High Output Voltage: Adjustable up to 57V, suitable for high-voltage applications where standard LDOs fail.
  • High Current Capability: 1.5A output supports power-hungry loads like amplifiers and industrial controls.
  • Excellent PSRR: 80dB at 120Hz ensures low ripple, critical for audio and precision analog circuits.
  • Robust TO-3 Package: Metal can package provides superior heat dissipation and mechanical strength for demanding environments.

High-Voltage Power Supplies

With an output up to 57V, the LM317HVKSTEEL is perfect for bench power supplies and lab equipment requiring adjustable high-voltage rails up to 1.5A.

Audio Amplifier Biasing

In tube amplifiers and high-end audio gear, this regulator provides a clean, adjustable positive rail for preamp stages, with 80dB PSRR reducing hum.

Industrial Motor Controllers

For industrial control systems operating on 48V buses, this LDO regulates down to a stable voltage for logic and driver circuits, ensuring reliable operation.

Solar Inverter Control

In solar power inverters, the LM317HVKSTEEL supplies a regulated voltage for control electronics from high DC bus voltages, improving system stability.

Telecom Power Distribution

In telecom equipment with -48V or +48V rails, this regulator provides a local adjustable supply for line cards and interface circuits.

Battery Charger Circuits

The adjustable output and 1.5A capability make it suitable for charging high-voltage battery packs (e.g., 48V) with a controlled voltage.

Q: What is the output voltage range?
A: The LM317HVKSTEEL is adjustable from 1.25V to 57V.
Q: What is the maximum output current?
A: It can deliver up to 1.5A.
Q: What is the input voltage range?
A: The input voltage can be up to 60V (typical for HV version).
Q: What is the PSRR?
A: PSRR is 80dB at 120Hz, decreasing to 65dB at higher frequencies.
Q: What package is available?
A: It comes in a TO-3-2 metal can package.
Q: Is this a positive regulator?
A: Yes, it is a positive adjustable linear regulator.
Base Product Number : LM317HVK
1.5A 57V Adjustable High Voltage LDO Linear Regulator LM317 National Semiconductor TO-3
Q: What is the output voltage range?
A: The LM317HVKSTEEL is adjustable from 1.25V to 57V.
Q: What is the maximum output current?
A: It can deliver up to 1.5A.
Q: What is the input voltage range?
A: The input voltage can be up to 60V (typical for HV version).
Q: What is the PSRR?
A: PSRR is 80dB at 120Hz, decreasing to 65dB at higher frequencies.
Q: What package is available?
A: It comes in a TO-3-2 metal can package.
Q: Is this a positive regulator?
A: Yes, it is a positive adjustable linear regulator.