LM3678SD-1.2/NOPB Texas Instruments Integrated Circuit (Small Outline No-lead) In Stock
The LM3678SD-1.2/NOPB is a fixed 1.2 V output synchronous step-down buck regulator from Texas Instruments capable of 1.5 A output, operating from 2.5 V to 5.5 V input using voltage-mode PWM control. It integrates the power switches and is housed in a compact 10-pin WSON package. Ideal for low-voltage point-of-load regulation in portable and embedded systems.
- Manufacturer
- Texas Instruments
- Package
- Small Outline No-lead
- Pin Count
- 11
- Lifecycle
- ACTIVE
- Datasheet
- LM3678SD-1.2/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -30.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 1.2 V output with up to 1.5 A load current for low-voltage core supply applications
- Wide input range: 2.5 V to 5.5 V compatible with 3.3 V and 5 V system rails
- Integrated synchronous power switches eliminating external catch diode
- Voltage-mode PWM control with 10-pin WSON compact package
- RoHS compliant lead-free NOPB (No Lead) designation
Applications
The LM3678SD-1.2/NOPB is used for powering low-voltage processor cores, memory ICs, and FPGA core rails in embedded computing and portable consumer electronics. Its integrated switches and compact WSON package make it well suited for generating 1.2 V rails in laptop peripherals, wireless modules, and handheld devices where board space and efficiency are both critical design constraints.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | ALSO AVAILABLE VOUT= 1.2V |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.5V |
| Input Voltage-Nom | 3.6V |
| JESD-30 Code | S-PDSO-N10 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 1.5A |
| Output Voltage-Max | 1.2V |
| Output Voltage-Min | 0.8V |
| Output Voltage-Nom | 0.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 3600kHz |
| Technology | CMOS |
| Temperature Grade | OTHER |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline No-lead |
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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage does the LM3678SD-1.2/NOPB provide?
The LM3678SD-1.2/NOPB provides a fixed 1.2 V output voltage at up to 1.5 A, suitable for powering DDR memory, processor cores, and low-voltage FPGA core rails. The fixed output simplifies design by eliminating external voltage setting resistors while providing a standard low-voltage supply for modern digital ICs.
What is the input voltage range of the LM3678SD-1.2/NOPB?
It operates from 2.5 V to 5.5 V input with a nominal 3.6 V operating point. This range covers single-cell Li-Ion batteries, 3.3 V regulated supplies, and 5 V bus rails, making the LM3678SD-1.2/NOPB versatile for portable, battery-powered, and wall-powered embedded designs alike.
What is the NOPB designation in the part number?
NOPB stands for No Lead (Pb-free), indicating that this version of the device uses a lead-free terminal plating compliant with RoHS environmental regulations. The base LM3678 may have tin-lead variants; the NOPB suffix explicitly identifies the green, lead-free version required for products sold in the EU and other markets with environmental restrictions.
What package does the LM3678SD-1.2/NOPB use?
It is housed in a 10-pin WSON (Very Thin Small Outline No-Lead) package with a small footprint and exposed thermal pad. The WSON package provides excellent thermal conductivity through the exposed pad soldered to the PCB ground plane, and its compact size is ideal for space-constrained portable electronics power supply designs.
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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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