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Texas Instruments LM2672M-12/NOPB
- Part No.:
- LM2672M-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2672M-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:963
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Product details
Overview
LM2672M-12/NOPB from Texas Instruments is a monolithic step-down (buck) DC-DC switching regulator delivering 1-A output current with fixed 12-V output, 260-kHz internal oscillator, ±1.5% output voltage tolerance, and 94% efficiency at 24-V input. It serves as a high-efficiency primary or preregulator in industrial power supplies and embedded systems requiring stable mid-range voltage conversion.
For engineers reviewing the LM2672M-12/NOPB datasheet, LM2672M-12/NOPB pinout, LM2672M-12/NOPB application, or LM2672M-12/NOPB equivalent, key selection considerations include its 8-V to 40-V input range, integrated DMOS power switch, TTL-compatible ON/OFF control, soft-start capability, and thermal/current protection - all in an SOIC-8 package with minimal external component count.
Technical Context
The LM2672M-12/NOPB implements a fixed-frequency PWM controller with a 260-kHz internal oscillator driving an integrated DMOS high-side power switch. Its feedback loop uses direct connection of the FB pin to the output for regulation, eliminating external resistors in the 12-V fixed version.
It features cycle-by-cycle current limiting (1.25–2.1 A), thermal shutdown, and a dedicated boot-strap capacitor (CB) node to drive the high-side MOSFET gate above VIN. The SYNC pin supports external clock synchronization up to 400 kHz, while the ON/OFF pin enables low-quiescent standby mode (50 μA typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±1.5% over line/load/temperature - ensures stable rail for logic, analog, and interface ICs without trimming. |
| Max Output Current | 1 A continuous - supports single-rail microcontrollers, sensors, and peripheral modules in compact designs. |
| Input Voltage Range | 8 V to 40 V - accommodates wide-input industrial, automotive, and telecom power buses. |
| Switching Frequency | 260 kHz (±10%) - enables use of small, cost-effective inductors and capacitors while avoiding AM radio band interference. |
| Efficiency | 94% at VIN = 24 V, IOUT = 1 A - minimizes heat generation and eliminates need for heatsinks on PCB copper traces. |
| Quiescent Current | 3.6 mA active, 50 μA standby - extends battery life in always-on or low-power wake-up applications. |
| Switch RDS(on) | 0.3 Ω typical at 25°C - reduces conduction loss and improves full-load efficiency versus discrete FET solutions. |
Pinout & Package
LM2672M-12/NOPB is housed in an 8-pin SOIC package (5.00 mm × 6.20 mm), surface-mount compatible with standard reflow profiles and IPC-7351 footprint standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CB) | Bootstrap capacitor connection | Connects 0.01-μF ceramic capacitor to VSW to elevate gate drive voltage above VIN for full MOSFET enhancement. |
| 2 (SS) | Soft-start timing input | Controls output voltage ramp rate via external capacitor; floating disables soft-start for fast turn-on. |
| 3 (SYNC) | Frequency synchronization input | Accepts external TTL/CMOS clock >275 kHz to align switching noise; open-circuit defaults to 260-kHz internal oscillator. |
| 4 (FB) | Feedback sense input | Internally tied to 12-V divider; direct connection to output ensures precise regulation without external resistors. |
| 5 (ON/OFF) | Enable/disable control | TTL-compatible input: ≥1.4 V enables operation; ≤0.8 V disables with 50-μA standby current. |
| 6 (GND) | Power ground | Main return path for input/output capacitors and inductor; requires short, low-impedance PCB trace to minimize noise. |
| 7 (VIN) | Input supply | Accepts 8–40 V DC; connects to high-frequency bypass capacitor (CIN) with minimal loop area to reduce EMI. |
| 8 (VSW) | Switch node output | Drives external inductor and Schottky diode; high dv/dt node requiring careful layout to limit radiated emissions. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS power switch | Eliminates external high-side FET and driver, reducing BOM count and layout complexity in buck converters. |
| Patented internal frequency compensation | Enables stable operation with only 5 external components - no loop compensation design required. |
| TTL shutdown with 50-μA standby | Supports system-level power sequencing and ultra-low-power sleep modes without auxiliary circuitry. |
| Thermal shutdown + current limit protection | Prevents damage during overload, short-circuit, or high-ambient conditions without external sensing components. |
| Soft-start and sync-capable oscillator | Reduces inrush current and allows EMI filtering alignment across multiple synchronized converters. |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Converts 24-V vehicle battery or 24-V industrial bus to clean 12-V rail for microcontroller, CAN transceiver, and sensor interfaces. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing regulated 12-V output with fast transient response to load steps. Use Value: Delivers 94% efficiency at 24-V input, minimizing thermal stress in sealed enclosures and extending operational lifetime. |
Use Scenario: Powers 12-V logic and analog subsystems in body electronics (door modules, lighting controllers) with wide-input tolerance. IC Role / Device Role / Timing Role: Fixed-output step-down regulator handling cold-crank (6.5-V) to load-dump (40-V) transients per ISO 16750-2. Use Value: ±1.5% output tolerance and thermal shutdown ensure reliable operation across –40°C to 125°C junction temperature range. |
| Point-of-Load Converter for FPGA I/O | Preregulator for Linear Regulators |
Use Scenario: Generates stable 12-V intermediate rail for FPGA I/O banks or ADC/DAC reference supplies in test equipment. IC Role / Device Role / Timing Role: High-efficiency buck stage preceding low-noise LDOs, reducing heat dissipation before final regulation. Use Value: 260-kHz switching enables compact 68-μH inductor and 47-μF tantalum output capacitor per TI reference design. |
Use Scenario: Steps down unregulated 24-V or 36-V supply to ~13-V before low-dropout linear regulators for noise-sensitive analog circuits. IC Role / Device Role / Timing Role: Efficient preregulator minimizing power loss and thermal load on downstream LDOs. Use Value: 94% efficiency at full load reduces total system power loss by >50% versus direct LDO regulation from 24 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2672MX-12/NOPB | Same electrical specs; tape-and-reel packaging vs. tube (M-12/NOPB); identical SOIC-8 footprint and pinout. | No functional difference; selected for automated SMT assembly rather than manual or low-volume prototyping. | Choose LM2672MX-12/NOPB for volume production with pick-and-place machines; LM2672M-12/NOPB for evaluation or small-batch builds. |
| LM2671M-12/NOPB | 3-A output rating, same 12-V fixed output, 260-kHz frequency, but higher quiescent current (5.5 mA vs. 3.6 mA) and larger thermal footprint. | Suitable where future load growth beyond 1 A is anticipated; requires larger inductor and output capacitor per datasheet guidelines. | Select LM2671M-12/NOPB only if >1-A peak current is required; LM2672M-12/NOPB offers optimal size/efficiency balance for 1-A loads. |
Compared with LM2672MX-12/NOPB, the LM2672M-12/NOPB differs only in packaging format - not performance - making it ideal for prototyping and low-volume validation. Versus LM2671M-12/NOPB, it delivers matched 12-V regulation with lower quiescent current and smaller solution size, better suited for space-constrained 1-A applications.
Availability
LM2672M-12/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and FPGA power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for LM2672M-12/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 specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2672 series belongs to TI's SIMPLE SWITCHER® family - designed specifically for ease-of-use, minimal external component count, and robust operation in industrial and automotive environments without requiring power supply design expertise.
FAQ
What is the maximum input voltage rating for LM2672M-12/NOPB?
The absolute maximum input voltage for LM2672M-12/NOPB is 45 V, but the recommended operating range is 8 V to 40 V. Operation above 40 V risks exceeding safe junction temperature or violating SOA limits, especially under high ambient or full-load conditions. Always refer to the thermal derating curves in the LM2672M-12/NOPB datasheet when designing for edge-case inputs.
Does LM2672M-12/NOPB require external feedback resistors?
No. The LM2672M-12/NOPB is a fixed 12-V output variant with internal resistor divider; the FB pin must be connected directly to the output capacitor for regulation. External resistors are only required for the adjustable version (LM2672MX-ADJ/NOPB). Incorrect addition of resistors to LM2672M-12/NOPB will disrupt regulation and cause overvoltage.
Can LM2672M-12/NOPB synchronize to an external clock?
Yes. The SYNC pin on LM2672M-12/NOPB accepts TTL- or CMOS-compatible external clocks from 275 kHz to 400 kHz. When driven, it overrides the internal 260-kHz oscillator and locks switching to the external signal - useful for EMI reduction and multi-converter phase alignment. Do not apply clocks below 275 kHz, as this may cause erratic operation or disable current limit foldback.
What thermal management is needed for LM2672M-12/NOPB at 1-A load?
At 1-A output and typical 24-V input, LM2672M-12/NOPB dissipates ~0.6 W. Its SOIC-8 package has RθJA = 105°C/W; with 2 oz copper and 2 in² exposed pad area, junction temperature rise stays within spec (<125°C) without heatsinks. TI confirms PCB copper traces serve as sufficient heat sinking - no additional thermal vias or metal slugs are mandatory for standard layouts.
Is LM2672M-12/NOPB pin-compatible with other LM2672 fixed-output variants?
Yes. All LM2672 fixed-output versions (3.3-V, 5-V, 12-V) share identical SOIC-8 pinout, electrical interface, and functional behavior - only the internal feedback divider differs. This allows drop-in replacement during design iteration or voltage scaling, provided input/output capacitors and inductor ratings remain appropriate for the new output voltage and load.
LM2672M-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 6.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 260kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2672M-12/NOPB FAQ
1.How can I place an order for LM2672M-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2672M-12/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 LM2672M-12/NOPB reliable?
The price and inventory of LM2672M-12/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2672M-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2672M-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2672M-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2672M-12/NOPB?
LM2672M-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2672M-12/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 LM2672M-12/NOPB?
For technical support, including LM2672M-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2672M-12/NOPB requirements.
6.How does Aetrix verify that LM2672M-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2672M-12/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 LM2672M-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2672M-12/NOPB?
All LM2672M-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2672M-12/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 LM2672M-12/NOPB part is unused and in its original packaging.
Return procedure for LM2672M-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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