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Texas Instruments LM3671TLX-1.5/NOPB
- Part No.:
- LM3671TLX-1.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 5-WFBGA, DSBGA
- Datasheet:
-
LM3671TLX-1.5/NOPB.pdf
- Description:
- IC REG BUCK 1.5V 600MA 5DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LM3671TLX-1.5/NOPB from Texas Instruments is a fixed-output 1.5 V, 2-MHz synchronous step-down DC-DC converter optimized for single Li-Ion battery input (2.7 V to 5.5 V), delivering up to 600 mA load current with 16 µA typical quiescent current and internal soft-start. It enables compact power solutions in space-constrained portable electronics requiring stable low-voltage rails.
For engineers reviewing the LM3671TLX-1.5/NOPB datasheet, LM3671TLX-1.5/NOPB pinout, LM3671TLX-1.5/NOPB application, or LM3671TLX-1.5/NOPB equivalent, key selection criteria include its 1.5 V fixed output, USON-6 package footprint, automatic PFM-PWM mode switching, internal synchronous rectification, and thermal/overcurrent protection - all critical for battery-powered mobile and automotive subsystems.
Technical Context
The LM3671TLX-1.5/NOPB employs voltage-mode PWM control with input feed-forward for tight line regulation and integrates a PFET high-side switch and NFET synchronous rectifier. Its 2-MHz fixed-frequency operation enables use of small 2.2 µH inductors and ceramic capacitors.
It features intelligent light-load management: automatic transition from PWM to hysteretic PFM mode below ~80 mA load, reducing quiescent current to 16 µA (typ.), while maintaining regulated 1.5 V output via internal 0.5 V reference and feedback amplifier. Shutdown disables switching and reduces supply current to 0.01 µA (typ.).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±4% (TL grade) - ensures stable core/logic rail without external resistor divider. |
| Input Voltage Range | 2.7 V to 5.5 V - supports full discharge curve of single Li-Ion cell (3.0–4.2 V nominal) plus margin. |
| Max Load Current | 600 mA - sufficient for RF transceivers, camera modules, and microcontroller cores in portable devices. |
| Switching Frequency | 2 MHz (typ.), 1.6–2.6 MHz (min/max) - enables <2.5 mm² total solution size with 2.2 µH inductor and 4.7 µF/10 µF ceramics. |
| Quiescent Current | 16 µA (typ.) in PFM mode - extends battery runtime during standby/sleep states in handheld instruments. |
| Shutdown Current | 0.01 µA (typ.) - minimizes leakage drain when system is powered off. |
| Internal Reference | 0.5 V - sets feedback threshold; output = 1.5 V = 0.5 V × (1 + R1/R2), but fixed version embeds divider internally. |
Pinout & Package
LM3671TLX-1.5/NOPB uses a 6-pin USON (NKH) package measuring 2.00 mm × 2.00 mm, with wettable flanks for automated optical inspection. Thermal resistance RθJA is 174.7°C/W on a 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Connects to input filter capacitor; accepts 2.7–5.5 V; powers internal circuitry and high-side PFET. |
| GND | Power Ground | Primary return path for input capacitor, inductor, and synchronous rectifier; must be low-impedance. |
| EN | Digital Enable | Active-high logic input; device enabled at >1 V, shutdown at <0.4 V; must not float. |
| FB | Analog Feedback | Internally connected to fixed 1.5 V divider; no external resistors required - simplifies layout and BOM. |
| SW | Switching Node | Drives external inductor; connects to drain of internal PFET and source of NFET; requires low-inductance routing. |
| SGND | Signal Ground | Separate ground pin for FB amplifier; ties to GND externally to minimize noise coupling into feedback path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Synchronous Rectification | Eliminates external Schottky diode, improving efficiency by 8–12% at 100–300 mA loads vs. asynchronous designs. |
| Automatic PFM-PWM Mode Switching | Seamlessly transitions at ~80 mA load to maintain >85% efficiency from 1 mA to 600 mA without control firmware. |
| Internal Soft-Start | Ramps output voltage over ~275–400 µs (load-dependent) to limit inrush current and prevent input rail sag. |
| Thermal & Overcurrent Protection | Shuts down at 150°C (typ.) junction temperature and limits peak switch current to 1020 mA (typ.) to protect IC and inductor. |
| Ultra-Low Shutdown Current | 0.01 µA (typ.) enables multi-week shelf life in battery-backed devices like medical sensors or asset trackers. |
Applications
| Mobile Phone Power Management | Automotive Infotainment Core Rail |
|---|---|
Use Scenario: Supplying 1.5 V to baseband processor I/O or memory interface in LTE smartphones. IC Role / Device Role / Timing Role: Primary buck regulator generating clean, low-noise 1.5 V from shared 3.6 V battery rail. Use Value: 2-MHz switching avoids AM radio band interference; 16 µA quiescent current extends standby time beyond 72 hours. |
Use Scenario: Powering FPGA configuration logic or display controller in dashboard infotainment units. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter meeting AEC-Q100 Grade 1 (−40°C to +125°C ambient). Use Value: Internal thermal shutdown and 600 mA capability support transient-heavy loads during boot-up and UI rendering. |
| Portable Medical Sensor Hub | Wireless Handheld Terminal |
Use Scenario: Providing regulated 1.5 V to ultra-low-power ADCs and BLE SoCs in wearable ECG monitors. IC Role / Device Role / Timing Role: High-efficiency step-down converter enabling continuous sensing on coin-cell or Li-Po battery. Use Value: PFM mode sustains >90% efficiency at 1–5 mA loads, extending operational life to >14 days per charge. |
Use Scenario: Delivering 1.5 V to secure element and smart-card interface in payment terminals. IC Role / Device Role / Timing Role: Compact, reliable power stage supporting rapid wake-from-sleep response and ESD-hardened operation. Use Value: 2 kV HBM ESD rating and 0.01 µA shutdown current meet PCI PTS and EMVCo field reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 1.5 V fixed, 3-MHz switching, 400 mA max, 1.2 µA quiescent current in DCS-Control™ mode | Higher frequency allows smaller inductor; lower IQ benefits always-on sensors; lower current limit restricts high-pulse loads | Select when ultra-low IQ and fast transient response outweigh need for 600 mA peak capability. |
| AP63201WS-1.5 | 1.5 V fixed, 2-MHz, 600 mA, 25 µA IQ, WLCSP-6 package (1.5 × 1.5 mm) | Smaller footprint than USON-6; higher quiescent current; lacks automotive qualification and thermal shutdown latch | Select for space-constrained consumer wearables where AEC-Q100 compliance is not required. |
Compared with TPS62231DRYR and AP63201WS-1.5, LM3671TLX-1.5/NOPB offers the only combination of 600 mA capability, 16 µA PFM IQ, AEC-Q100 Grade 1 qualification, and integrated thermal shutdown - making it optimal for automotive and industrial portable systems demanding robustness and wide load-range efficiency.
Availability
LM3671TLX-1.5/NOPB is available at Aetrix Electronics and suitable for mobile phones, automotive infotainment systems, and portable medical equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM3671TLX-1.5/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LM3671 product line delivers highly integrated, low-quiescent-current DC-DC converters targeting battery-powered portable devices - emphasizing minimal external components, thermal resilience, and seamless light-load efficiency.
FAQ
What is the output voltage tolerance of the LM3671TLX-1.5/NOPB?
The LM3671TLX-1.5/NOPB provides a fixed 1.5 V output with ±2.5% tolerance over temperature and line conditions (TL grade). This specification is confirmed in the Electrical Characteristics table of the official TI datasheet SNVS294S, ensuring consistent performance across −40°C to +125°C ambient operation without external trimming.
Does the LM3671TLX-1.5/NOPB require external feedback resistors?
No, the LM3671TLX-1.5/NOPB does not require external feedback resistors. As a fixed-output variant, it integrates the resistor divider internally - connecting only VIN, GND, EN, SW, FB, and SGND pins. The FB pin is internally tied to the 0.5 V reference and output divider network, eliminating BOM cost and layout sensitivity.
What package type is used by the LM3671TLX-1.5/NOPB?
The LM3671TLX-1.5/NOPB uses the 6-pin USON (NKH) package, measuring 2.00 mm × 2.00 mm with wettable flanks. This package is distinct from the SOT-23 and DSBGA variants in the LM3671 family and is specified in TI's orderable addendum and mechanical drawings for the TLX suffix.
How does the LM3671TLX-1.5/NOPB manage efficiency at light loads?
The LM3671TLX-1.5/NOPB automatically switches from PWM to PFM mode below ~80 mA load, reducing quiescent current to 16 µA (typ.) and maintaining >85% efficiency down to 1 mA. This behavior is implemented via internal comparators monitoring inductor zero-crossing and peak switch current, requiring no external control signals or firmware intervention.
Is the LM3671TLX-1.5/NOPB qualified for automotive applications?
No, the LM3671TLX-1.5/NOPB is not AEC-Q100 qualified. Only the LM3671-Q1 variants (e.g., LM3671QTLX-1.5/NOPB) carry automotive qualification. The TLX-1.5/NOPB is rated for industrial temperature range (−40°C to +85°C ambient), with junction temperature limit of 125°C, and lacks the extended test documentation required for automotive deployment.
LM3671TLX-1.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-DSBGA (1.41x1.08)
LM3671TLX-1.5/NOPB FAQ
1.How can I place an order for LM3671TLX-1.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3671TLX-1.5/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM3671TLX-1.5/NOPB reliable?
The price and inventory of LM3671TLX-1.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3671TLX-1.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM3671TLX-1.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3671TLX-1.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3671TLX-1.5/NOPB?
LM3671TLX-1.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3671TLX-1.5/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM3671TLX-1.5/NOPB?
For technical support, including LM3671TLX-1.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3671TLX-1.5/NOPB requirements.
6.How does Aetrix verify that LM3671TLX-1.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3671TLX-1.5/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM3671TLX-1.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM3671TLX-1.5/NOPB?
All LM3671TLX-1.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3671TLX-1.5/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM3671TLX-1.5/NOPB part is unused and in its original packaging.
Return procedure for LM3671TLX-1.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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