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Texas Instruments LM317LM/NOPB
- Part No.:
- LM317LM/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Description:
- IC REG LIN POS ADJ 100MA 8SOIC
- Quantity:
Unit Price:$0
Ext Price:$0
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Product Details
LM317LM/NOPB - 100 mA Adjustable Linear Regulator
Texas Instruments LM317LM/NOPB is a wide-input adjustable positive linear regulator in an 8-pin SOIC package, specified for up to 100 mA and a 1.2 V to 37 V output range.
The exact order code, SOIC-D package, tube quantity, temperature range, pin functions, and electrical limits were checked against official Texas Instruments product and data-sheet records.
Overview
The LM317L-N develops a nominal 1.25 V reference between VOUT and ADJ. Two external resistors set the regulated output, while the floating architecture allows operation across a wide supply range as long as the input-to-output differential and device dissipation remain within limits.
Key Advantages
A two-resistor divider selects the output voltage.
Fits low-power bias, reference, and local regulation functions.
Supports up to 40 V from input to output within thermal limits.
Current limiting, thermal overload protection, and safe-area protection are integrated.
Feature Summary
1.2 V minimum, 1.25 V typical, and 1.3 V maximum under the stated data-sheet conditions.
Typical line regulation is 0.01%/V and typical load regulation is 0.1% at 25 degrees C.
Up to 80 dB typical with a 10 microfarad adjustment bypass capacitor.
Basic stability does not require one, although capacitors can improve transient response and bypassing.
Package & Footprint
The M suffix maps to the TI D package: an 8-pin SOIC with a nominal 3.91 mm by 4.90 mm body. The exact LM317LM/NOPB orderable part is active, RoHS compliant, rated from -40 degrees C to +125 degrees C, and supplied 95 units per tube.
- Body: approximately 3.91 mm by 4.90 mm nominal
- Pitch: 1.27 mm
- Carrier: tube, 95 units
- Marking: LM317 LM
Pin Functions
Key Specifications
| Manufacturer | Texas Instruments |
|---|---|
| Function | Adjustable positive linear regulator |
| Output current | Up to 100 mA |
| Output range | 1.2 V to 37 V |
| Reference voltage | 1.2 V minimum, 1.25 V typical, 1.3 V maximum |
| Maximum input-output differential | 40 V absolute maximum |
| Typical line regulation | 0.01%/V at 25 degrees C |
| Typical load regulation | 0.1% at 25 degrees C |
| Adjustment current | 50 microamperes typical, 100 microamperes maximum |
| Minimum load current | 1.5 mA typical, 2.5 mA maximum for 3 V to 15 V differential |
| Output noise | 0.003% of VOUT typical, 10 Hz to 10 kHz |
| Ripple rejection | 65 dB typical without CADJ; 80 dB typical with 10 microfarads |
| Operating junction temperature | -40 degrees C to +125 degrees C |
| SOIC thermal resistance | 160 degrees C/W junction-to-ambient |
| Package | 8-pin SOIC-D, tube |
Typical values are design guidance rather than guaranteed production limits; apply the exact test conditions in the TI data sheet.
Replacement Considerations
A replacement must match the adjustable topology, 100 mA current class, 40 V input-output differential capability, SOIC-D pin mapping, reference tolerance, temperature range, and protection behavior. Verify whether a candidate uses the same multiple-VOUT-pin arrangement before board substitution.
No internal alternative link is asserted without an exact product and manufacturer match from the production API.
Manufacturer Information
Texas Instruments lists LM317LM/NOPB as an active catalog product in the LM317L-N family. The /NOPB suffix identifies the lead-free orderable version; official quality data lists RoHS compliance and MSL Level 1 at 260 degrees C.
Applications
Generate a user-selected voltage for analog or mixed-signal loads.
A resistor between VOUT and ADJ converts the reference into regulated current.
Improve supply regulation and ripple performance after a preregulator.
Use an appropriate feedback network to control the output set point.
Quality & Authenticity
Confirm the full LM317LM/NOPB order code, TI package-D dimensions, `LM317 LM` marking, tube label, lot traceability, and lead condition. Distinguish this tube version from LM317LMX/NOPB tape-and-reel material.
FAQ
Is the output fixed?
No. Two external resistors set the output from about 1.2 V to 37 V.
How much current can it supply?
Up to 100 mA when voltage headroom and junction-temperature limits are satisfied.
Must every SOIC pin be connected?
VIN is pin 1, ADJ is pin 4, VOUT appears on pins 2, 3, 6, and 7, and pins 5 and 8 are no-connect.
Does it need an output capacitor?
No capacitor is required for basic stability, but bypass and output capacitors may improve noise and transient behavior.
Is LM317LMX/NOPB the same carrier?
No. LM317LM/NOPB is the 95-piece tube version; the X order code is tape and reel.
Engineering Notice
Check the worst-case input-output differential, dropout headroom, minimum load, feedback-resistor tolerance, power dissipation, SOIC thermal path, transient response, and fault discharge paths. Keep the VOUT-to-ADJ feedback loop short and add protection diodes when large output or adjustment capacitors can discharge through the regulator.
LM317LM/NOPB Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 37V
- Voltage Dropout (Max):
- -
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 5 mA
- Current - Supply (Max):
- -
- PSRR:
- 80dB ~ 65dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
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