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Texas Instruments LM337K STEEL/NOPB — Power Management (PMIC / Gate Driver)

LM337K STEEL/NOPB Negative Adjustable Regulator, TO-3, 1.5 A

MPNLM337K STEEL/NOPB
Obsolete

Texas Instruments LM337K STEEL/NOPB, negative adjustable voltage regulator, 1.5 A output, -1.2 V to -37 V range, 77 dB PSRR at 120 Hz, TO-204AA (TO-3) through-hole package, 0°C to 125°C operating temperature.

Texas Instruments LM337K STEEL/NOPB datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM337K STEEL/NOPB specifications
ParameterValue
Output typeAdjustable
MountingThrough Hole
Voltage - input-40V
Voltage - output-37V
Voltage - output (Min (Fixed))-1.2V
Output current1.5A
Operating temperature0°C~125°C
PSRR77dB (120Hz)
PackageTray
CaseTO-204AA, TO-3
Protection featuresOver Temperature, Short Circuit
Number of regulators1
Output configurationNegative

Product details

Negative rail regulator in a TO-3 can

The LM337K STEEL/NOPB is a negative adjustable voltage regulator from Texas Instruments, delivering up to 1.5 A output with an adjustable range from -1.2 V down to -37 V.

Output current and voltage envelope

Rated for 1.5 A continuous output current, the LM337K STEEL/NOPB can handle moderate loads on a negative rail. The input voltage maximum is -40 V, and the output can be adjusted down to -37 V (minimum -1.2 V). This envelope covers most common negative supply needs — -5 V, -12 V, -15 V, or -24 V rails — with headroom for input ripple.

Protection and temperature grade

Built-in over-temperature and short-circuit protection are included, which simplifies the external protection circuitry.

Frequently asked questions

What is the best replacement for LM337K STEEL/NOPB?

For a drop-in TO-3 negative regulator, the LM337 series includes other variants (e.g., LM337K) that may be functionally similar but should be verified against the original BOM requirements. Independent distribution can help source the exact obsolete part or suggest an alternative after reviewing the application.