LM3670MF-1.8/NOPB Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
The LM3670MF-1.8/NOPB is a miniature step-down DC-DC switching regulator from Texas Instruments with a fixed 1.8V output, designed for ultra-low-voltage circuits. It accepts 2.5V to 5.5V input, delivers up to 300 mA output current, and automatically switches between PFM and PWM modes for maximum efficiency. Packaged in a compact 5-pin SOT-23 for space-constrained portable designs.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LM3670MF-1.8/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7120(MOQ 1000)
- 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 LM3670MF-1.8/NOPB?
- Fixed 1.8V step-down switching regulator with 300 mA output current capability
- Input voltage range of 2.5V to 5.5V for Li-ion battery and USB-powered applications
- Automatic PFM/PWM mode switching for high efficiency across full load range
- Voltage-mode PWM control with internal compensation for minimal external components
- Up to 95% conversion efficiency enabling extended battery runtime
- Compact 5-pin SOT-23 package for ultra-small portable device power supply design
What is LM3670MF-1.8/NOPB used for?
The LM3670MF-1.8/NOPB is used in portable consumer electronics, Bluetooth modules, and IoT sensor nodes powered by Li-ion batteries or USB where a small 1.8V supply is needed with high efficiency. It is also deployed in low-power microcontroller power supplies, wireless sensor networks, and wearable electronics where the automatic PFM/PWM switching maintains high conversion efficiency from light load to full load, extending battery life in energy-constrained applications.
What are the specifications of LM3670MF-1.8/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | AUTOMATIC PFM/PWM MODE SWITCHING |
| 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 | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.35A |
| Output Voltage-Max | 3.3V |
| Output Voltage-Min | 0.7V |
| 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 | 1300kHz |
| 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 LM3670MF-1.8/NOPB datasheet?
LM3670MF-1.8/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3670MF-1.8/NOPB?
Compatible alternatives and drop-in replacements for LM3670MF-1.8/NOPB:
Switching Regulator, Voltage-mode, 0.75A, 1300kHz Switching Freq-Max, CMOS, PDSO5
Frequently Asked Questions
What is the output voltage and current of the LM3670MF-1.8/NOPB?
The LM3670MF-1.8/NOPB provides a fixed 1.8V regulated output with up to 300 mA continuous output current. The fixed output voltage eliminates the need for feedback resistors, simplifying PCB layout and reducing component count in portable power supply designs targeting 1.8V digital logic rails.
What input voltage range does the LM3670MF-1.8/NOPB accept?
The LM3670MF-1.8/NOPB accepts an input voltage from 2.5V to 5.5V, making it compatible with single-cell lithium-ion batteries (nominally 3.6V–4.2V), USB 5V power, and 3.3V bus rails. The 2.5V minimum input ensures the regulator continues producing 1.8V output even at the end of a Li-ion battery discharge cycle.
How does the LM3670MF-1.8/NOPB achieve high efficiency?
The LM3670MF-1.8/NOPB automatically switches between PFM (Pulse Frequency Modulation) at light loads and PWM (Pulse Width Modulation) at heavy loads. PFM mode reduces switching frequency at low current, minimizing switching losses and enabling efficiency above 90% even at currents below 10 mA — critical for always-on IoT devices and wireless sensor nodes.
Is the LM3670MF-1.8/NOPB RoHS compliant?
Yes, the LM3670MF-1.8/NOPB is RoHS compliant and lead-free as indicated by the NOPB suffix and JESD-609 e3 code. The 5-pin SOT-23 package uses tin-silver-copper solder terminations, meeting EU RoHS Directive restrictions and enabling use in green-certified consumer electronics and industrial equipment.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1000+ | $0.7560 | $756.00 |
| 2000+ | $0.7240 | $1448.00 |
| 5000+ | $0.7120 | $3560.00 |
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