LM317LM/NOPBIn StockTexas Instruments
LM317LM/NOPB is a 500mA adjustable linear regulator (1.25V–37V output) in SOT-23-3, from Texas Instruments. Starts at $0.225 each, in stock, ships from 1 piece worldwide.
- Manufacturer
- Texas Instruments
- Package
- SOT-23
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- LM317LM/NOPB Datasheet PDF
- Category
- power-management
- Price
- From $0.0681(MOQ 1)
- Temp Range
- 0.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Adjustable output voltage from 1.25V to 37V
- 500mA continuous output current
- SOT-23-3 compact surface-mount package
- Built-in thermal overload and short-circuit protection
- Commercial temperature range: 0°C to +125°C
- RoHS compliant, lead-free (NOPB)
- Low external component count — requires only two resistors to set output voltage
Applications
Widely used in battery chargers, adjustable bench power supplies, and portable consumer electronics requiring regulated DC rails. Also suited for industrial control boards, LED driver circuits, and point-of-load regulation in space-constrained PCB designs.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Nom | 1.8V |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 4.2V |
| Input-Output Voltage Differential-Max | 40V |
| Input-Output Voltage Differential-Min | 3V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Line Regulation-Max (%/V) | 0.07 |
| Load Regulation-Max(%) | 1.5% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.1A |
| Output Voltage1-Max | 38V |
| Output Voltage1-Min | 1.2V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 3% |
| Package | SOT-23 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM317LM/NOPB:
Higher current (1.5A) version of LM317 in TO-220 package; same adjustment formula
Adjustable Positive Standard Regulator, 1.2V Min, 38V Max, BIPolar, PDSO8
Frequently Asked Questions
How do I set the output voltage of the LM317LM/NOPB?
The LM317LM/NOPB output voltage is set by a resistor divider connected between the ADJ pin and output. Using the formula Vout = 1.25 × (1 + R2/R1), you can achieve any voltage between 1.25V and 37V. A typical R1 of 240Ω and adjustable R2 up to 7kΩ covers most common rails.
What is the maximum current the LM317LM/NOPB can supply?
The LM317LM/NOPB is rated for up to 500mA continuous output current. It includes built-in thermal overload protection and current limiting, so it will reduce current rather than fail if thermal limits are exceeded — suitable for light-load applications and portable designs.
Which package does the LM317LM/NOPB use, and is it lead-free?
It comes in the SOT-23-3 surface-mount package (3 pins, ~2.9mm × 1.3mm footprint). The NOPB suffix confirms it is fully RoHS compliant and lead-free, meeting EU and global environmental regulations for PCB assembly.
What are common alternatives to the LM317LM/NOPB?
Drop-in or pin-compatible alternatives include the LM317LDBVR (same TI family, 500mA, SOT-23), NCV317SN1T1G from ON Semiconductor, and the LM317T in TO-220 for higher current needs. All share the same 1.25V reference and two-resistor adjustment method.
Can the LM317LM/NOPB be used in battery charging applications?
Yes. The adjustable output and built-in current limiting make it suitable for single-cell NiMH or lead-acid trickle chargers. By setting the output to 4.2V with a sense resistor, it can also function as a simple constant-current / constant-voltage charger at low charge rates under 500mA.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.2250 | $0.23 |
| 54+ | $0.1500 | $8.10 |
| 575+ | $0.0874 | $50.26 |
| 1900+ | $0.0791 | $150.29 |
| 2720+ | $0.0736 | $200.19 |
| 4410+ | $0.0681 | $300.32 |
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