LM3671MFX-ADJ/NOPB Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
LM3671MFX-ADJ/NOPB is a 2MHz, 600mA adjustable step-down DC-DC converter with 2.7V–5.5V input range and PFM/PWM control. From $0.43 in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LM3671MFX-ADJ/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4304(MOQ 160)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3671MFX-ADJ/NOPB?
- 2MHz switching frequency enables ultra-compact external components (inductor and capacitors)
- 600mA continuous output current in tiny SOT23-5 package for space-constrained designs
- Wide 2.7V–5.5V input range supports single Li-Ion, 2-cell NiMH, and 3.3V/5V rail applications
- Dual-mode PFM/PWM control improves light-load efficiency while maintaining low ripple at full load
- Adjustable output voltage via external resistor divider for flexible system power design
What is LM3671MFX-ADJ/NOPB used for?
The LM3671MFX-ADJ/NOPB is well suited for portable consumer electronics such as smartphones, tablets, and wearables where board space and battery life are critical. It is also used in IoT sensor nodes, handheld instruments, and battery-powered industrial devices that require a compact, efficient point-of-load regulator. Its adjustable output and wide input range make it a versatile choice for converting Li-Ion or multi-cell NiMH battery voltages to regulated core or I/O supply rails.
What are the specifications of LM3671MFX-ADJ/NOPB?
| 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-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.6A |
| Output Voltage-Max | 3.3V |
| Output Voltage-Min | 1.1V |
| 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 | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.953mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM3671MFX-ADJ/NOPB datasheet?
LM3671MFX-ADJ/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3671MFX-ADJ/NOPB?
Compatible alternatives and drop-in replacements for LM3671MFX-ADJ/NOPB:
Switching Regulator, Voltage-mode, 0.6A, 2600kHz Switching Freq-Max, PDSO5
Switching Regulator, Voltage-mode, 1.15A, 2600kHz Switching Freq-Max, PDSO5
Frequently Asked Questions
What is the input voltage range of the LM3671MFX-ADJ/NOPB?
The LM3671MFX-ADJ/NOPB operates from a 2.7V to 5.5V input supply, making it compatible with single-cell Li-Ion batteries (nominally 3.6V), dual-cell NiMH packs, and regulated 3.3V or 5V rails in embedded systems.
How is the output voltage set on the LM3671MFX-ADJ/NOPB?
The output voltage is adjustable via an external resistor divider connected to the feedback pin. By selecting the appropriate resistor values, designers can set any output voltage within the device's supported range, providing flexibility for different load requirements.
What control modes does the LM3671MFX-ADJ/NOPB support?
The LM3671MFX-ADJ/NOPB supports both Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM) control techniques. PWM mode delivers low output ripple at heavy loads, while PFM mode significantly improves efficiency under light-load conditions, extending battery life in portable applications.
What package does the LM3671MFX-ADJ/NOPB come in?
It is available in a SOT23-5 (5-pin small-outline transistor) package, one of the smallest surface-mount packages available. This makes it ideal for space-constrained PCB designs in wearables, IoT modules, and handheld devices.
Is the LM3671MFX-ADJ/NOPB RoHS compliant?
Yes, the LM3671MFX-ADJ/NOPB is lead-free and RoHS compliant, as indicated by its /NOPB suffix (No Lead). It meets international environmental regulations for electronic components used in consumer and industrial products.
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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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