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Texas Instruments LM337T/NOPB — Power Management (PMIC / Gate Driver)

LM337T/NOPB Texas Instruments Adjustable Negative Regulator

MPNLM337T/NOPB
Active

Texas Instruments LM337T/NOPB, adjustable negative voltage regulator, 1.5 A output, -1.2 V to -37 V range, 77 dB PSRR at 120 Hz, TO-220-3 through-hole package, 0°C to 125°C operating temperature.

$2.2400Ref. price · indicative, final on quote
Texas Instruments LM337T/NOPB datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM337T/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)
PackageTube
CaseTO-220-3
Protection featuresOver Temperature, Short Circuit
Number of regulators1
Output configurationNegative

Product details

1.5 A adjustable negative rail — TO-220-3

It delivers up to 1.5 A output current over a -1.2 V to -37 V adjustable output range, with a maximum input voltage of -40 V.

This is a typical figure for a 1970s-vintage three-terminal regulator design, adequate for most linear supplies but not a low-noise LDO replacement.

The /NOPB suffix indicates lead-free (Pb-free) plating, compliant with RoHS requirements.

On-chip protection includes over-temperature shutdown and short-circuit current limiting, covering the common fault modes in a linear regulator.

Frequently asked questions

What is the output current of LM337T/NOPB?

The LM337T/NOPB is rated for 1.5 A output current. This is the continuous current capability at the output pin, limited by the TO-220-3 package thermal dissipation.

What is the difference between LM337 and LM317?

The LM337 is the negative-voltage complement to the LM317 positive regulator. The LM337T/NOPB regulates a negative input rail down to a negative adjustable output, while the LM317 handles positive rails. Both share the same three-terminal adjustable topology and 1.5 A output rating, but the pinout and polarity are reversed.

Can LM337T/NOPB be used as a current source?

Yes, the LM337T/NOPB can be configured as a constant-current source by placing a resistor between the output and adjust terminals. The output current is set by Iout = 1.25 V / R, with the same topology used for the LM317 positive current source. The 1.5 A output rating sets the upper current limit.