LM3671TL-3.3/NOPB Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments LM3671TL-3.3/NOPB is a 2 MHz, 600 mA step-down DC-DC converter with 2.7V to 5.5V input range and fixed 3.3V output in a tiny 5-ball DSBGA package. Supports PWM and PFM modes for high efficiency.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LM3671TL-3.3/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3145(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 2 MHz fixed switching frequency with optional pulse-frequency modulation for light-load efficiency, minimizing inductor size to sub-1 µH values
- 600 mA continuous output current from a 2.7 V to 5.5 V input in a 5-ball DSBGA measuring under 1 mm x 1 mm for ultra-compact designs
- Fixed 3.3 V output with voltage-mode PWM control delivering tight load and line regulation across -40°C to 85°C temperature range
- Lead-free, RoHS-compliant packaging enabling use in consumer, wearable, and industrial designs without hazardous materials
Applications
The LM3671TL-3.3/NOPB is tailored for space-constrained portable applications such as wearable health monitors, wireless earbuds, and IoT sensor tags that run from single-cell Li-ion or Li-polymer batteries. Its 2 MHz switching frequency allows miniature inductors and capacitors, enabling power stages that fit on a few square millimeters of PCB. The PFM capability extends battery life in burst-mode operation by reducing switching losses during light load conditions typical of sleep-state IoT devices.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| 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-PBGA-B5 |
| JESD-609 Code | e1 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.6A |
| Output Voltage-Max | 3.3V |
| Output Voltage-Min | 1.1V |
| Output Voltage-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | BGA5,2X3,20 |
| Package Shape | RECTANGULAR |
| Package Style | GRID ARRAY, VERY THIN PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 2600kHz |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Tin/Silver/Copper (Sn/Ag/Cu) |
| Terminal Form | BALL |
| Terminal Pitch | 0.5mm |
| Terminal Position | BOTTOM |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
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 switching frequency does LM3671TL-3.3/NOPB use and how does that affect passive component selection?
The LM3671TL-3.3/NOPB switches at 2 MHz, which allows the use of inductors as small as 1 µH and ceramic output capacitors below 10 µF, enabling the entire power stage to fit on less than 10 mm2 of PCB area — a key advantage for wearable and miniature IoT designs.
Over what input voltage range does LM3671TL-3.3/NOPB operate, and can it run directly from a single Li-ion cell?
The device accepts an input voltage from 2.7 V to 5.5 V, which fully covers the 3.0 V to 4.2 V discharge curve of a standard Li-ion cell, so no pre-regulator is needed; the 3.3 V output stays regulated throughout the battery discharge cycle down to the 2.7 V minimum input threshold.
How does the PFM mode on LM3671TL-3.3/NOPB improve battery life in a sleep-cycling IoT sensor?
In pulse-frequency modulation mode the converter reduces its switching frequency proportionally to load current, dropping switching losses from the PWM-mode value of 2 MHz to a fraction of that at loads below 50 mA, which can extend battery life by 20% to 40% in duty-cycled sensors that spend most of their time in sleep state drawing under 1 mA.
What is the physical size of the LM3671TL-3.3/NOPB DSBGA package and how does it compare to a standard SOT-23-5?
The 5-ball DSBGA package measures approximately 0.9 mm x 1.0 mm with a 0.5 mm ball pitch, which is roughly 75% smaller in footprint than a SOT-23-5 package at 1.6 mm x 2.9 mm, making it the preferred choice when PCB area is the primary design constraint in wearable or implantable devices.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.3252 | $0.33 |
| 10+ | $0.3198 | $3.20 |
| 25+ | $0.3145 | $7.86 |
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