LM2940CS-12/NOPBIn StockTexas Instruments
LM2940CS-12/NOPB is a 1A fixed 12V LDO voltage regulator from Texas Instruments. It features 0.5V typical dropout voltage, 26V max input, and built-in reverse battery protection. From $1.04, in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- TO-XXX (Inc. DPAK)
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- LM2940CS-12/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.0400(MOQ 10)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 12V output with ±1% accuracy across load and temperature
- Low dropout voltage: 0.5V typical, 1V max at full 1A load
- Wide input range: 13.6V to 26V, with 45V absolute max for transient protection
- Built-in reverse battery protection and current limiting
- TO-263 (D-PAK) surface-mount package for compact PCB designs
Applications
The LM2940CS-12/NOPB is widely used in automotive and industrial power supply designs requiring a stable 12V rail from higher-voltage sources. Its low dropout performance makes it ideal for battery-powered systems, post-regulator stages in DC-DC converters, and embedded controllers where efficiency and space are critical. Typical applications include automotive electronics, industrial sensor modules, and 12V regulated power rails in communication equipment.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Not Compliant |
| YTEOL | 15 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1V |
| Dropout Voltage1-Nom | 0.5V |
| Input Voltage Absolute-Max | 45V |
| Input Voltage-Max | 26V |
| Input Voltage-Min | 13.6V |
| JESD-30 Code | R-PSSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.12% |
| Load Regulation-Max | 0.12% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 12.6V |
| Output Voltage1-Min | 11.4V |
| Output Voltage1-Nom | 12V |
| 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% |
| ## LM2940CS-12/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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM2940CS-12/NOPB:
Frequently Asked Questions
What is the dropout voltage of the LM2940CS-12/NOPB?
The LM2940CS-12/NOPB has a typical dropout voltage of 0.5V and a maximum of 1V at full 1A output current. This means the input voltage must be at least 12.5V (typical) to 13V (worst case) to maintain a regulated 12V output.
What is the input voltage range for the LM2940CS-12/NOPB?
The LM2940CS-12/NOPB operates with an input voltage range of 13.6V minimum to 26V maximum, with an absolute maximum rating of 45V for transient conditions. This wide range makes it well-suited for automotive 12V battery systems and industrial power supplies.
What applications is the LM2940CS-12/NOPB suitable for?
The LM2940CS-12/NOPB is suitable for automotive electronics, industrial control systems, embedded microcontroller boards, and any design needing a stable 12V regulated output from a higher-voltage source. Its reverse battery protection and current limiting also make it robust in harsh environments.
Is the LM2940CS-12/NOPB RoHS compliant?
The LM2940CS-12/NOPB is Pb-free (lead-free) as indicated by its NOPB suffix, though its REACH compliance code is listed as Not Compliant. Always verify the latest compliance status with the distributor or TI datasheet before use in regulated end products.
What package does the LM2940CS-12/NOPB come in?
The LM2940CS-12/NOPB is housed in the TO-263 (D-PAK) surface-mount package, a 3-pin power package designed for efficient thermal dissipation on PCBs. This package is compatible with standard SMT assembly processes and is widely available from distributors worldwide.
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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.
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