LM3940IS-3.3/NOPB Texas Instruments Integrated Circuit (TO-XXX (Inc. DPAK)) In Stock
LM3940IS-3.3/NOPB is a 1A low dropout linear regulator converting 5V to 3.3V output with only 0.31V typical dropout voltage. Features fixed 3.3V output, up to 1A load current, and 7.5V absolute maximum input. From $1.42, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- TO-XXX (Inc. DPAK)
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- LM3940IS-3.3/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.4225(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3940IS-3.3/NOPB?
- 1A output current capability with only 0.31V typical dropout voltage for efficient 5V-to-3.3V conversion
- Fixed 3.3V output voltage with tight regulation, ideal for direct microcontroller and logic supply
- Wide input voltage range 4.5V to 5.5V with 7.5V absolute maximum for robust system compatibility
- TO-92/DPAK package options enable both through-hole and surface-mount board designs
- RoHS-compliant (Pb-free) construction meeting modern environmental and compliance requirements
What is LM3940IS-3.3/NOPB used for?
The LM3940IS-3.3/NOPB is widely used in embedded systems and IoT devices that require a stable 3.3V supply derived from a 5V bus, such as microcontroller boards, FPGAs, and sensor modules. It suits portable consumer electronics and industrial control equipment where low dropout voltage minimizes power dissipation and extends battery life. The component also fits telecommunications and data-acquisition hardware needing a dependable point-of-load regulator with minimal external components.
What are the specifications of LM3940IS-3.3/NOPB?
| Pbfree Code | Yes |
| Reach Compliance Code | Not Compliant |
| YTEOL | 15 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1V |
| Dropout Voltage1-Nom | 0.31V |
| Input Voltage Absolute-Max | 7.5V |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 4.5V |
| JESD-30 Code | R-PSSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.04% |
| Load Regulation-Max | 0.08% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 3.47V |
| Output Voltage1-Min | 3.13V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SMSIP3H,.55TB |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 245 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 5.2% |
| ## LM3940IS-3.3/NOPB Alternates Showing results | Image |
| Package | TO-XXX (Inc. DPAK) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM3940IS-3.3/NOPB datasheet?
LM3940IS-3.3/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3940IS-3.3/NOPB?
Compatible alternatives and drop-in replacements for LM3940IS-3.3/NOPB:
Regulator, 3.3V, 1V Dropout, BIPolar, PSSO3
Regulator, 3.3V, 1V Dropout, BIPolar, PSSO3
suggested
suggested
suggested
Frequently Asked Questions
What is the dropout voltage of the LM3940IS-3.3/NOPB?
The LM3940IS-3.3/NOPB has a typical dropout voltage of 0.31V and a maximum of 1V at full 1A load current, allowing reliable 3.3V output from a 4.5V to 5.5V input supply without excessive headroom.
What applications is the LM3940IS-3.3/NOPB best suited for?
It is ideal for powering 3.3V microcontrollers, FPGAs, wireless modules, and sensor ICs directly from a 5V system bus. Its low dropout and 1A current rating make it suitable for embedded systems, IoT devices, industrial controllers, and any design converting a standard 5V rail to 3.3V logic voltage.
What package is the LM3940IS-3.3/NOPB available in?
The LM3940IS-3.3/NOPB is available in the TO-92/DPAK style surface-mount package (TO-XXX family), offering a compact, low-profile footprint suitable for surface-mount PCB assembly in space-constrained designs.
Is the LM3940IS-3.3/NOPB RoHS compliant?
Yes, the LM3940IS-3.3/NOPB carries a Pb-free (RoHS) designation, meaning it uses lead-free solder finish and complies with RoHS environmental directives, making it suitable for products sold in EU and other regulated markets.
Where can I buy the LM3940IS-3.3/NOPB and what is the price?
The LM3940IS-3.3/NOPB is available from FindMyChip starting at $1.42 per unit. Stock is available globally with worldwide shipping, and you can submit a quote request directly on the product page for bulk pricing.
Related Guides
STM32H725IGT3 Selection Guide: Memory, Package, Temperature, and Supply
Choose the right STM32H725 variant by comparing Flash, package, pin count, temperature grade, connectivity, and production requirements.
Aug 1, 2026
STM32H725IGT3 High-Performance MCU Design Guide
Design STM32H725IGT3 systems for reliable 550 MHz operation with practical power, clock, cache, DMA, PCB, ADC, and recovery guidance.
Jul 31, 2026
150141VS73100 Violet SMD LED Selection Guide: Color, Drive, and Sourcing
Select the 150141VS73100 by wavelength, brightness, drive current, 3528 fit, reliability, and traceable sourcing requirements.
Jul 31, 2026
STEF05SGR 5 V eFuse Protection Design Guide
Design a reliable 5 V STEF05SGR eFuse stage with current-limit math, capacitor sizing, thermal analysis, fault recovery, and PCB layout guidance.
Jul 30, 2026
Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.2760 | $2.28 |
| 3+ | $1.7070 | $5.12 |
| 16+ | $1.4225 | $22.76 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit