LM7812S/NOPB Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments LM7812S/NOPB is a fixed 12V linear voltage regulator accepting 14.5V to 30V input with 2V dropout, capable of supplying regulated 12V output for industrial and consumer electronics, available in a 3-pin surface-mount D-PAK package.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- LM7812S/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7936(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 12V regulated output with tight accuracy for powering analog and digital circuits from unregulated supplies
- 2V nominal dropout voltage enables efficient operation with 14.5V minimum input from common 15V to 24V rails
- Absolute maximum input of 35V provides margin for automotive and industrial supply transients
- 3-pin D-PAK surface-mount package supports automated PCB assembly with improved thermal dissipation versus TO-220
Applications
The LM7812S/NOPB is widely used as a post-regulator in industrial power supplies, audio amplifier bias circuits, and relay driver boards where a stable 12V rail is required from a higher unregulated input. Its fixed 12V output and robust short-circuit protection make it suitable for consumer electronics power adapters, automation equipment I/O power planes, and automotive accessory modules. The D-PAK surface-mount package enables compact, thermally efficient PCB designs with higher power density than traditional through-hole linear regulators.
Specifications
| Pbfree Code | Yes |
| Date Of Intro | 2016-07-23 |
| YTEOL | 15 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 2V |
| Input Voltage Absolute-Max | 35V |
| Input Voltage-Max | 30V |
| Input Voltage-Min | 7.5V |
| 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 | 1.5A |
| 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 |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT STANDARD 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 | 3% |
| Package | Other |
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 LM7812S/NOPB:
suggested
Frequently Asked Questions
What input voltage range is required to maintain a regulated 12V output from the LM7812S/NOPB?
The LM7812S/NOPB requires a minimum input voltage of 14.5V, which accounts for the 12V output plus the 2V nominal dropout voltage. The device can accept inputs up to 30V continuously and withstand transients up to 35V absolute maximum, covering 15V, 18V, and 24V unregulated supply inputs commonly used in industrial and consumer equipment.
How does the LM7812S D-PAK package improve thermal performance compared to a through-hole TO-220 regulator?
The D-PAK package allows the exposed metal tab to be soldered directly to a PCB copper pour, reducing junction-to-board thermal resistance compared to a TO-220 mounted without a heat sink. With adequate copper area on the PCB, the LM7812S can dissipate several watts continuously without exceeding its 125°C junction temperature limit, enabling higher output current in space-constrained SMT designs.
Can the LM7812S/NOPB be used in automotive applications, and what protection features does it include?
The LM7812S/NOPB can be used in 12V automotive accessory circuits where input transients up to 35V occur during load dump or alternator regulation events. The device includes internal thermal shutdown protection that disables the output if junction temperature exceeds the safe limit, as well as output short-circuit current limiting to prevent damage during fault conditions, reducing the need for external protection components.
For a 12V, 1A regulated supply, what external components does the LM7812S/NOPB require?
The LM7812S/NOPB requires only two capacitors for stable operation: a 330 nF ceramic or film capacitor on the input pin and a 100 nF ceramic capacitor on the output pin, both placed within 5 mm of the device. This minimal external component count simplifies BOM management and PCB layout, making the LM7812S a cost-effective solution for point-of-load 12V regulation in space-constrained boards.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.9100 | $1.91 |
| 10+ | $1.4100 | $14.10 |
| 25+ | $1.3800 | $34.50 |
| 1000+ | $1.0600 | $1060.00 |
| 10000+ | $0.9472 | $9472.00 |
| 100000+ | $0.7936 | $79360.00 |
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