My Inquiry
My Account
Texas Instruments LM2672MX-12/NOPB
- Part No.:
- LM2672MX-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2672MX-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,283
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2672MX-12/NOPB from Texas Instruments is a monolithic 1-A step-down (buck) DC-DC switching regulator with fixed 12-V output, 8 V to 40 V input range, 260-kHz fixed-frequency oscillator, ±1.5% output voltage tolerance, and integrated DMOS power switch. It delivers high-efficiency regulation for industrial power rails and embedded system supplies.
For engineers reviewing the LM2672MX-12/NOPB datasheet, LM2672MX-12/NOPB pinout, LM2672MX-12/NOPB application, or LM2672MX-12/NOPB equivalent, key selection criteria include its 12-V fixed output, SOIC-8 package compatibility, thermal shutdown protection, TTL-compatible ON/OFF control, and minimal external component count (5 total).
Technical Context
The LM2672MX-12/NOPB implements a synchronous-free buck topology using an internal DMOS high-side switch controlled by a fixed 260-kHz PWM oscillator. Its feedback loop uses direct connection of the FB pin to the output capacitor-no external divider required-enabling stable 12-V regulation across –40°C to 125°C junction temperature.
Functional modes include active regulation (ON/OFF ≥1.4 V), low-power shutdown (ON/OFF ≤1.4 V, 50 μA standby), soft-start via SS pin capacitor, and optional frequency synchronization via SYNC pin. Protection includes cycle-by-cycle current limiting (1.25–2.1 A), thermal shutdown, and overvoltage clamp on CB and FB pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±1.5% over line, load, and temperature - ensures stable rail for microcontrollers and analog circuitry without trimming. |
| Input Voltage Range | 8 V to 40 V - supports wide-range industrial inputs including 12-V, 24-V, and 36-V battery or bus systems. |
| Output Current | 1 A continuous - sufficient for powering FPGA I/O banks, sensor signal chains, or multiple logic ICs. |
| Switching Frequency | 260 kHz (±10%) - enables use of compact 47–68 μH inductors and reduces EMI compared to lower-frequency alternatives. |
| Efficiency | 94% at VIN = 24 V, IOUT = 1 A - minimizes thermal stress and eliminates need for heatsinks beyond PCB copper. |
| Quiescent Current | 3.6 mA typical - maintains low no-load power draw in always-on subsystems. |
| Standby Current | 50 μA max - enables ultra-low-power sleep mode when ON/OFF pin is pulled low. |
Pinout & Package
LM2672MX-12/NOPB is housed in an 8-pin SOIC package (5.00 mm × 6.20 mm body size) with exposed pad not present. Pin functions are validated per TI SNVS136L Rev L datasheet Figure 3 (SOIC top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CB) | Bootstrap capacitor connection | Connects 0.01-μF ceramic capacitor to VSW to fully enhance internal DMOS switch gate - critical for low RDS(on) and high efficiency. |
| 2 (SS) | Soft-start timing input | Capacitor from SS to GND sets output voltage ramp time - prevents inrush current during power-up. |
| 3 (SYNC) | Frequency synchronization input | Accepts external TTL/CMOS clock >275 kHz to align switching with system timing - suppresses beat frequencies in multi-rail systems. |
| 4 (FB) | Feedback sense input | Internally tied to 12-V reference - connect directly to output capacitor for fixed-output operation; no resistor divider needed. |
| 5 (ON/OFF) | Enable/disable control | TTL-compatible input: ≥1.4 V enables regulation; ≤0.8 V disables with 50 μA standby draw - supports processor-controlled power sequencing. |
| 6 (GND) | Power ground | Main return path for input capacitor, output capacitor, and internal switch - must be short, low-impedance trace to minimize noise and instability. |
| 7 (VIN) | Input supply | Accepts 8–40 V unregulated DC - requires local 22-μF tantalum bypass capacitor placed adjacent to pin. |
| 8 (VSW) | Switch node output | Drives external inductor and Schottky catch diode - high dv/dt node requiring tight layout and guard ring to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS power switch | RDS(on) = 0.3 Ω max at 25°C - reduces conduction loss and enables 1-A output without external MOSFET. |
| Patented internal frequency compensation | Eliminates need for external compensation network - simplifies design and improves stability across all operating conditions. |
| Thermal shutdown + current limit protection | Auto-recovery after fault clearance - protects against sustained overload, short-circuit, or overheating without latch-up. |
| Soft-start and frequency sync | SS pin controls startup slew rate; SYNC pin enables deterministic ripple placement - essential for noise-sensitive RF and audio systems. |
| Minimal external components | Only 5 required: input cap, output cap, inductor, Schottky diode, bootstrap cap - accelerates prototyping and reduces BOM cost. |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Providing regulated 12-V rail from 24-V vehicle battery to power MCU, CAN transceivers, and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck converter delivering clean, efficient 12-V output with thermal protection during engine cranking transients. Use Value: 94% efficiency at 24-V input reduces heat buildup in sealed enclosures; 40-V abs max input withstands load-dump spikes. |
Use Scenario: Generating stable 12-V supply for door module electronics from variable 9–16-V automotive battery. IC Role / Device Role / Timing Role: Fixed-output step-down regulator with ON/OFF control synchronized to vehicle ignition state. Use Value: 50 μA standby current extends battery life in parked mode; ±1.5% tolerance ensures reliable CAN bus operation. |
| Point-of-Load for Industrial Sensors | Legacy Equipment Retrofit Power |
|
Use Scenario: Converting 24-V factory bus to precise 12-V for analog front-end amplifiers and ADC references. IC Role / Device Role / Timing Role: High-PSRR, low-noise DC-DC stage isolating sensitive analog circuitry from noisy digital supplies. Use Value: Direct FB-to-output connection eliminates resistor tolerance error; 260-kHz switching avoids audible noise in instrumentation. |
Use Scenario: Replacing aging linear regulators in legacy test equipment requiring 12-V @ 1 A with improved thermal performance. IC Role / Device Role / Timing Role: Drop-in buck replacement reducing board temperature rise and enabling fanless enclosure design. Use Value: SOIC-8 footprint matches many linear regulator footprints; no PCB redesign needed beyond adding inductor and diode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2672N-12 | Same electrical specs but in PDIP-8 package (10.16 mm × 6.60 mm); higher θJA = 95°C/W vs. SOIC's 105°C/W. | Preferred for through-hole prototyping or legacy wave-solder assembly; less suitable for space-constrained SMT designs. | Select LM2672N-12 only if PDIP mechanical fit or hand-soldering is required; SOIC offers better thermal performance in dense layouts. |
| LM2678-12 | Higher 5-A output capability, same 12-V fixed output, but larger SOIC-20 package and 200-kHz switching frequency. | Used where future current scalability or lower EMI is prioritized over footprint and component count. | Choose LM2678-12 only if >1-A load margin or reduced switching noise is mandatory; LM2672MX-12/NOPB is optimal for cost- and size-sensitive 1-A designs. |
Compared with LM2672N-12 and LM2678-12, the LM2672MX-12/NOPB provides the best balance of SOIC-8 footprint, 1-A capability, 260-kHz EMI profile, and production-ready RoHS-compliant packaging - making it ideal for volume industrial and automotive applications where thermal efficiency and board area are constrained.
Availability
LM2672MX-12/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and point-of-load power conversion requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for LM2672MX-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 company specializing in analog, embedded processing, and power management technologies, with decades of leadership in high-reliability power conversion ICs.
The LM2672MX-12/NOPB belongs to TI's SIMPLE SWITCHER® family - designed specifically for engineers needing fast, robust, low-component-count DC-DC solutions for industrial, automotive, and communications systems.
FAQ
What is the maximum input voltage rating for the LM2672MX-12/NOPB?
The LM2672MX-12/NOPB has an absolute maximum input voltage rating of 45 V, with recommended operating range from 8 V to 40 V. Exceeding 40 V continuously may trigger thermal shutdown or reduce reliability; operation up to 45 V is permitted only under transient conditions per TI SNVS136L Absolute Maximum Ratings table.
Does the LM2672MX-12/NOPB require external feedback resistors?
No, the LM2672MX-12/NOPB does not require external feedback resistors. As a fixed 12-V output variant, its internal voltage reference and amplifier are configured for direct FB-to-output connection - eliminating resistor tolerance errors and simplifying layout. External resistors are only needed for the adjustable version (LM2672ADJ).
Can the LM2672MX-12/NOPB synchronize to an external clock?
Yes, the LM2672MX-12/NOPB supports external frequency synchronization via its SYNC pin. An external TTL/CMOS clock signal >275 kHz (e.g., 400 kHz) can be AC-coupled to SYNC to lock switching frequency - useful for EMI reduction and ripple alignment in multi-converter systems. Internal oscillator remains at 260 kHz when SYNC is left open.
What thermal considerations apply to the LM2672MX-12/NOPB in SOIC-8 package?
The LM2672MX-12/NOPB in SOIC-8 has a junction-to-ambient thermal resistance (θJA) of 105°C/W on a standard 4-layer JEDEC board. At full 1-A load and 24-V input, typical power dissipation is ~600 mW - resulting in ~63°C junction rise above ambient. Adequate copper pour on GND and VIN traces serves as primary heatsinking; no additional heatsink is required.
Is the LM2672MX-12/NOPB pin-compatible with other LM2672 variants?
Yes, all LM2672 variants - including LM2672MX-12/NOPB, LM2672MX-3.3/NOPB, LM2672MX-5.0/NOPB, and LM2672MX-ADJ/NOPB - share identical SOIC-8 pinout and package dimensions. Only the FB pin configuration differs (direct connection for fixed outputs vs. resistor divider for ADJ), allowing hardware reuse across output voltages with minimal schematic changes.
LM2672MX-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 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
LM2672MX-12/NOPB FAQ
1.How can I place an order for LM2672MX-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2672MX-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 LM2672MX-12/NOPB reliable?
The price and inventory of LM2672MX-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 LM2672MX-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2672MX-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2672MX-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2672MX-12/NOPB?
LM2672MX-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2672MX-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 LM2672MX-12/NOPB?
For technical support, including LM2672MX-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2672MX-12/NOPB requirements.
6.How does Aetrix verify that LM2672MX-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2672MX-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 LM2672MX-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2672MX-12/NOPB?
All LM2672MX-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2672MX-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 LM2672MX-12/NOPB part is unused and in its original packaging.
Return procedure for LM2672MX-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2672MX-12/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
