LM3671MF-3.3In StockTexas Instruments
LM3671MF-3.3 is a synchronous step-down DC-DC converter with 3.3V fixed output, 600mA current capability, and 2.7V–5.5V input range. Features PWM/PFM control and ultra-compact SOT-23-5 package. From $0.44 in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- LM3671MF-3.3 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4385(MOQ 210)
- Temp Range
- -30.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3V output voltage with ±2% accuracy for stable power delivery
- 600mA output current with synchronous rectification for high efficiency up to 95%
- Wide 2.7V–5.5V input voltage range suitable for single-cell Li-Ion and 3.3V/5V rail applications
- Automatic PWM/PFM mode switching for optimized efficiency across load conditions
- Ultra-compact SOT-23-5 package requiring minimal external components
Applications
The LM3671MF-3.3 is ideal for portable consumer electronics such as smartphones, tablets, and wearables that require efficient 3.3V power from a Li-Ion battery. It is widely used in IoT sensor nodes, Bluetooth modules, and handheld medical devices where compact size and high efficiency at light loads are critical. The device also suits industrial handheld equipment and embedded microcontroller systems powered from 3.3V or 5V supply rails.
Specifications
| Pbfree Code | No |
| YTEOL | 0 |
| Additional Feature | PULSE FREQUENCY MODULATION TECHNIQUE IS ALSO POSSIBLE |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.7V |
| Input Voltage-Nom | 3.6V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 1.15A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 2600kHz |
| Temperature Grade | OTHER |
| Terminal Finish | TIN LEAD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| ## LM3671MF-3.3 Alternates Showing results | Image |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM3671MF-3.3:
Switching Regulator, Voltage-mode, 0.6A, 2600kHz Switching Freq-Max, PDSO5
Switching Regulator, Voltage-mode, 1.15A, 2600kHz Switching Freq-Max, PDSO5
suggested
suggested
suggested
suggested
suggested
Frequently Asked Questions
What is the input voltage range and output current capability of the LM3671MF-3.3?
The LM3671MF-3.3 operates from a 2.7V to 5.5V input voltage range and delivers up to 600mA of continuous output current at a fixed 3.3V output, making it well-suited for single-cell Li-Ion battery-powered applications.
What switching frequency does the LM3671MF-3.3 use, and what control modes are supported?
The LM3671MF-3.3 uses a fixed 1.6MHz switching frequency with voltage-mode PWM control. It also supports Pulse Frequency Modulation (PFM) technique to maintain high efficiency under light-load conditions, automatically transitioning between modes.
What package does the LM3671MF-3.3 come in, and what external components are required?
The LM3671MF-3.3 is available in a compact SOT-23-5 (5-pin) package. It requires only a small inductor and two capacitors externally, minimizing PCB footprint and simplifying design for space-constrained portable applications.
What are common alternatives to the LM3671MF-3.3?
Common alternatives include the TPS62203 and TPS62177 from Texas Instruments, which offer similar synchronous buck regulator functionality in SOT-23 packages. For higher current requirements, the TPS62133 supports up to 3A output while maintaining a small form factor.
Where can I buy the LM3671MF-3.3 and what is the price?
The LM3671MF-3.3 is available from FindMyChip with pricing starting from $0.44 per unit. Stock is available worldwide with global shipping options, and bulk pricing is available for larger order quantities.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 210+ | $0.9593 | $201.45 |
| 275+ | $0.9233 | $253.91 |
| 340+ | $0.8872 | $301.65 |
| 5000+ | $0.4478 | $2239.00 |
| 7000+ | $0.4431 | $3101.42 |
| 10000+ | $0.4385 | $4385.00 |
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