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Texas Instruments LM2937ES-8.0 — Analog & Data Acquisition

LM2937ES-8.0 LDO Regulator, 8V Fixed, 500mA, TO-263-3

MPNLM2937ES-8.0
Obsolete

Texas Instruments LM2937ES-8.0, positive fixed LDO regulator, 8V output, 500mA output, 26V max input, 1V dropout, -40°C to 125°C, DDPAK/TO-263-3, Tube.

Texas Instruments LM2937ES-8.0 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM2937ES-8.0 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input26V
Voltage dropout1V @ 50mA
Voltage - output (Min (Fixed))8V
Output current500mA
Current - supply20 mA
Current - quiescent2 mA
Operating temperature-40°C~125°C
PackageTube
CaseTO-263-4, D²Pak (3 Leads + Tab), TO-263AA
Protection featuresOver Temperature, Reverse Polarity, Short Circuit
Number of regulators1
Output configurationPositive

Product details

The LM2937ES-8.0: The 26 V maximum input voltage covers 12 V and 24 V nominal buses with margin; the 1 V dropout at 50 mA means the input must stay at least 1 V above 8 V at light load to maintain regulation.

Industrial temperature grade and protection set

Integrated protection against over-temperature, reverse polarity, and short circuit means the regulator can survive a miswired harness or a sustained output fault without external clamp diodes.

Quiescent current and supply budget

For a 500 mA output rail, the 2 mA Iq is negligible in the load budget, but the 20 mA max supply figure should be factored into the upstream rail sizing if the regulator is always enabled.

The LM2937ES-8.0 is listed as obsolete. Current pricing and stock position are confirmed at quote time.

Package and mounting — DDPAK/TO-263-3

Supplied in a TO-263-4 / D²Pak surface-mount package (3 leads plus tab), also referenced as DDPAK/TO-263-3.

Frequently asked questions

Does LM2937ES-8.0 require a heatsink?

Thermal management depends on the load current, input voltage, and ambient temperature. The DDPAK/TO-263-3 package relies on the PCB copper area under the exposed tab for heat dissipation. At 500 mA with a 26 V input dropping to 8 V, the power dissipation is 9 W — a heatsink or forced airflow is required; at lighter loads the copper pour alone may suffice. The datasheet's thermal resistance curves should be consulted for the specific layout.