LM3940IS-3.3
- Part number
- LM3940IS-3.3
- Manufacturer
- Texas Instruments
- Package
- TO263-3
- Status
- Active
- Stock
- Available / RFQ
- Price
- $3.13
- Year / date code
- 2025
View on SJ Chip · Request a quote
Product Overview
LM3940IS-3.3 from Texas Instruments in TO263-3 is listed for electronic component sourcing at SJ Chip. Review technical specifications, package information, and nearby series parts below, then submit an RFQ to confirm stock, date code, and lead time.
Technical Specifications
- Part Number
- LM3940IS-3.3
- Manufacturer
- Texas Instruments
- Series
- LM3940I
- Package / Case
- TO263-3
- Package Family
- SOP
- Pin / Ball Count (from marking)
- 3
- Lifecycle Status
- Active
- Category
- Power Management
- Mounting Type
- Surface Mount (SMT)
Electrical Characteristics
- Device Class
- DC-DC / LDO / power IC
- Input / Output Range
- Confirm VIN, VOUT, and current limit in the datasheet
- Switching / Topology
- Buck, boost, LDO, or controller — not drop-in across families
- Thermal
- PowerPAD / exposed pad soldering is often required for rated current
- Package Constraint
- TO263-3 thermal land and pinout must match the layout
Package Information
- Package
- TO263-3
- Package Family
- SOP
- Mounting
- Surface Mount (SMT)
- Terminal Count (parsed)
- 3
- Outline Note
- Package marking on this page is for sourcing reference. Confirm body size, pitch, and land pattern from the manufacturer datasheet before layout.
Applications
LM3940IS-3.3 is used on board power rails, industrial 12 V/24 V supplies, and point-of-load converters. Confirm VIN/VOUT, current, and the TO263-3 thermal pad before layout. Nearby bucks/LDOs need compensation and footprint review.
Procurement notes
Confirm the full ordering code, package (TO263-3), and quantity on RFQ. SJ Chip replies with stock, condition, and lead time. Nearby MPNs are for evaluation only.
Compare Similar Parts (LM3940I)
- LM3940IS-3.3/NOPB · IC
- LM3940IMPX-3.3 · SOT-223
- LM3940ISX-3.3 · TO-263
- LM3940IMP-3.3 / LM3940IMPX-3.3/NOPB · IC
- LM3940IS · IC
- LM3940IT-3.3 · IC
- LM3940ISX-3.3/NOPB · IC
- LM3940IMP-3.3/NOPB · HTQFP64
- LM3940IMP-3.3 · SOT-223-4
- LM3940IMPX-3.3/NOPB · SOT-223
Potential Alternatives (TO263-3)
- LM337KTTR · TO263-3
- TL720M05QKTTRQ1 · TO263-3
- LM340SX-5.0/NOPB · TO263-3
- LM2990S-5.0/NOPB · TO263-3
FAQ
Where to buy LM3940IS-3.3?
You can request LM3940IS-3.3 from SJ Chip via the RFQ form on this page or the site-wide RFQ. We confirm manufacturer (Texas Instruments), package, quantity, and lead time on the quotation.
Is LM3940IS-3.3 available?
Listed inventory shows 148 pcs. Lot, date code, and shippable quantity are confirmed on RFQ — treat the listing as availability to quote, not a guaranteed cart ship.
What is the package of LM3940IS-3.3?
The sourcing listing shows package TO263-3. Always verify body size, pitch, and land pattern against the Texas Instruments datasheet before PCB layout.
What are alternatives to LM3940IS-3.3?
Potential alternatives include LM3940IS-3.3/NOPB, LM3940IMPX-3.3, LM3940ISX-3.3 and other same-series or same-package listings — all require datasheet and pinout checks. These are similar stock for evaluation, not automatic drop-in replacements.
Sourcing information
| Part Number | LM3940IS-3.3 |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TO263-3 |
| Description | Texas Instruments · LM3940IS-3.3 · TO263-3 package · electronic component sourcing |
| Availability | Listed inventory: 148 pcs — confirm lot, date code, and quantity on RFQ |
| RFQ | Submit the full part number and quantity through the RFQ form |
| Lead Time | Lead time is confirmed on the quotation after RFQ. In-stock conventional lots often ship in 3–5 working days from Hong Kong; special, allocation, or obsolete lines are quoted separately. |
| Condition | Condition is stated on the quotation/PI (new, surplus, or EOL). Lots are inspected before shipment. |