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LM317LCDRG4

Texas Instruments LM317LCDRG4 Adjustable Regulator, 100 mA

MPNLM317LCDRG4
End of Life

Texas Instruments LM317LCDRG4, adjustable positive voltage regulator, 100 mA output, 1.2V to 32V output range, 38V max input, PSRR 80dB~65dB (120Hz), 8-SOIC surface mount package, 0°C~125°C operating temperature.

$0.4900Ref. price · indicative, final on quote
Texas Instruments LM317LCDRG4 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM317LCDRG4 specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Voltage - input38V
Voltage - output32V
Voltage - output (Min (Fixed))1.2V
Output current100mA
Current - quiescent2.5 mA
Operating temperature0°C~125°C
PSRR80dB ~ 65dB (120Hz)
PackageTape & Reel (TR); Cut Tape (CT)
Case8-SOIC (0.154\", 3.90mm Width)
Protection featuresOver Current, Over Temperature, Short Circuit
Number of regulators1
Output configurationPositive

Product details

100 mA adjustable regulator in 8-SOIC

Output voltage is adjustable from 1.2 V to 32 V using two external resistors, with a maximum input voltage of 38 V. The single regulator output is positive-configuration only.

PSRR and protection — what the specs mean for the rail

PSRR is specified at 80 dB to 65 dB at 120 Hz, which means this part attenuates full-wave-rectified ripple by a factor of 10,000 to 1,800. For an analog supply rail feeding an op-amp or ADC reference, that 80 dB floor at line frequency keeps the 120 Hz ripple out of the signal chain. Built-in protection includes over-current, over-temperature, and short-circuit shutdown. The 2.5 mA quiescent current is typical for a three-terminal adjustable regulator at this current rating — not a low-Iq part, but the protection features make it a robust choice for unregulated input rails where fault conditions are expected.

No AEC-Q100 automotive qualification is listed for this variant.

Frequently asked questions

What is the output current of LM317LCDRG4?

The LM317LCDRG4 is rated for 100 mA maximum output current. This is the low-current SOIC-8 variant of the LM317 family; the standard LM317 (TO-220) delivers 1.5 A, so check your load budget before substituting.

What is the difference between LM317LCDRG4 and LM317L?

The LM317LCDRG4 is the 8-SOIC surface-mount variant of the LM317L low-current adjustable regulator. Both share the same 100 mA output rating and adjustable output from 1.2 V to 32 V, but the RG4 suffix specifically identifies the SOIC-8 package and Tape & Reel delivery. The LM317L base number is also available in TO-92 and other packages — the RG4 is the surface-mount option for reflow assembly.