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Texas Instruments LM2672MX-5.0/NOPB
- Part No.:
- LM2672MX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2672MX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,801
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Product details
Overview
LM2672MX-5.0/NOPB from Texas Instruments is a monolithic 1-A step-down (buck) DC-DC voltage regulator with fixed 5-V output, 260-kHz internal oscillator, ±1.5% output voltage tolerance over line and load, 8 V to 40 V input range, and integrated DMOS power switch. It delivers high-efficiency power conversion in industrial control modules requiring stable 5-V rail generation from unregulated 12–24 V bus supplies.
For engineers reviewing the LM2672MX-5.0/NOPB datasheet, LM2672MX-5.0/NOPB pinout, LM2672MX-5.0/NOPB application, or LM2672MX-5.0/NOPB equivalent, key selection criteria include its fixed 5-V output accuracy, thermal shutdown protection, TTL-compatible ON/OFF control, soft-start capability, and compatibility with standard Schottky catch diodes and low-ESR output capacitors in compact SOIC-8 layouts.
Technical Context
The LM2672MX-5.0/NOPB implements a fixed-frequency PWM buck controller with an integrated high-side DMOS FET switch, internal frequency compensation, and current-mode control. Its 260-kHz switching frequency enables use of small external inductors (e.g., 47 µH) and ceramic/tantalum output capacitors without external loop compensation.
It operates in continuous conduction mode up to 1 A load, features cycle-by-cycle current limiting (1.25–2.1 A), thermal shutdown, and supports synchronization via the SYNC pin. The FB pin is internally connected to the 5-V output divider, eliminating external resistors-unlike the adjustable version-ensuring stable regulation without feedback network errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over –40°C to 125°C, 8–40 V input, 20 mA–1 A load - ensures stable logic supply for microcontrollers and sensors without trimming. |
| Switching Frequency | 260 kHz (±10%) - enables compact filter design with standard 47 µH inductors and reduces EMI compared to lower-frequency buck converters. |
| Max Output Current | 1 A continuous - supports single-rail powering of FPGA I/O banks, industrial PLC I/O modules, or embedded Ethernet PHYs. |
| Input Voltage Range | 6.5 V to 40 V - accommodates wide-input industrial 12/24 V DC systems and automotive battery transients. |
| Efficiency | 90% at VIN = 12 V, IOUT = 1 A - minimizes thermal stress on PCB copper traces; no heatsink required under typical loads. |
| Standby Current | 50 µA typical at TJ = 25°C when ON/OFF = 0 V - enables low-power sleep modes in battery-backed or energy-conscious systems. |
| Thermal Protection | Internal thermal shutdown - prevents latch-up or damage during overload or poor airflow conditions in enclosed enclosures. |
Pinout & Package
LM2672MX-5.0/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 100-nF ceramic capacitor to VSW to gate-drive high-side DMOS switch fully ON; critical for <0.3 Ω RDS(ON) and >90% efficiency. |
| 2 SS | Soft-start timing input | Capacitor to GND sets output voltage ramp time; floating disables soft-start - prevents inrush current into large output capacitance. |
| 3 SYNC | Frequency synchronization input | TTL/CMOS-compatible input; open-circuit defaults to 260 kHz; external clock >275 kHz forces synchronous operation for EMI control. |
| 4 FB | Feedback sense input | Internally tied to 5-V output divider; direct connection to output capacitor enables precise regulation without external resistor network. |
| 5 ON/OFF | Enable/disable control | Logic-high (>1.4 V) enables regulation; logic-low (<0.8 V) shuts down IC with 50 µA standby current - ideal for MCU-controlled power sequencing. |
| 6 GND | Power ground | Main return path for input capacitor (CIN), output capacitor (COUT), and catch diode - must be short, low-inductance trace to minimize noise. |
| 7 VIN | Input supply | Accepts 6.5–40 V DC; connects to high-frequency bypass capacitor (22 µF tantalum); trace to CIN/GND must be shortest possible. |
| 8 VSW | Switch node output | Drives external Schottky diode cathode and inductor; swings from VIN to ~–0.5 V; requires tight layout to reduce EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS power switch | 0.25 Ω RDS(ON) at 25°C enables 1-A output with minimal conduction loss and self-heating - eliminates need for external MOSFET driver stage. |
| Patented internal frequency compensation | Eliminates external compensation components - reduces BOM count and layout sensitivity while ensuring stability across all operating conditions. |
| Soft-start with external capacitor | Programmable output voltage ramp prevents input current surges and output overshoot during power-up - protects downstream logic and analog circuitry. |
| TTL-compatible ON/OFF control | Direct interface with 3.3-V or 5-V logic outputs; no level-shifting required - simplifies integration into microcontroller-based power management systems. |
| Current limit + thermal shutdown | Dual fault protection: cycle-by-cycle current limiting (1.25–2.1 A) plus thermal shutdown at ~150°C - ensures robust operation under short-circuit or overload. |
Applications
| Industrial PLC Power Supply | Embedded Network Controller |
|---|---|
|
Use Scenario: Generating clean 5-V rail from 24-V DC field bus to power ARM Cortex-M7 MCU, RS-485 transceivers, and isolated I/O drivers. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 5-V output with <1.5% tolerance and <100-mV ripple under dynamic load steps. Use Value: Eliminates need for discrete buck controller + external MOSFET + compensation network - reduces board area by >40% and design cycle time. |
Use Scenario: Powering Ethernet PHY, USB hub controller, and flash memory in DIN-rail mounted gateway with ambient temperature up to 70°C. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter providing low-noise 5-V supply synchronized to system clock via SYNC pin to suppress conducted EMI. Use Value: 90% efficiency at full load keeps junction temperature below 105°C on 2-oz copper; no heatsink required in sealed enclosure. |
| Automotive Body Control Module | Test & Measurement Instrumentation |
|
Use Scenario: Converting 12-V vehicle battery (8–16 V nominal, up to 40 V during load dump) to stable 5-V supply for CAN transceiver and microcontroller. IC Role / Device Role / Timing Role: Input-transient-tolerant buck regulator with thermal shutdown and current limiting - survives ISO 7637-2 pulse 5a (load dump). Use Value: Wide 6.5–40 V input range and 50 µA shutdown current enable always-on monitoring without draining battery during vehicle sleep mode. |
Use Scenario: Providing precision 5-V reference rail for ADC front-end and digital logic in portable multimeter with battery backup. IC Role / Device Role / Timing Role: High-accuracy fixed-output regulator with ±1.5% output tolerance and low 50 µA standby current during measurement idle state. Use Value: Tight output tolerance ensures consistent ADC reference scaling; low quiescent current extends battery life beyond 200 hours per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2672M-5.0/NOPB | Same electrical specs, but in PDIP-8 package (10.16 mm × 6.60 mm); higher θJA (95°C/W vs. 105°C/W); no moisture sensitivity level rating. | Preferred for through-hole prototyping or legacy board rework where SOIC footprint unavailable; less suitable for high-density SMT production. | Select LM2672M-5.0/NOPB only when SOIC assembly is impractical; verify thermal performance in target enclosure with PDIP's larger thermal resistance. |
| LM2596SX-5.0/NOPB | 3-A rated, 150-kHz switching frequency, different pinout (FB, VIN, GND, OUT, ON/OFF), no SYNC or SS pins; ±2% output tolerance. | Better suited for higher-current, cost-sensitive applications where 5-V accuracy and EMI control are secondary to output capability. | Choose LM2596SX-5.0/NOPB only if >1 A load or lower BOM cost is primary; do not substitute without redesigning layout, feedback, and filter components. |
Compared with LM2672M-5.0/NOPB, the LM2672MX-5.0/NOPB offers superior thermal performance in space-constrained SMT designs; versus LM2596SX-5.0/NOPB, it provides tighter output accuracy, higher switching frequency for smaller magnetics, and additional control features (SYNC, SS) at the cost of lower current rating.
Availability
LM2672MX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, embedded networking, test equipment, and automotive body electronics requiring stable component supply and long-term manufacturability.
Supply support for LM2672MX-5.0/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 LM2672MX-5.0/NOPB belongs to TI's SIMPLE SWITCHER® family - engineered for ease-of-use in cost-sensitive, medium-power DC-DC applications where minimal external components and proven reliability are essential.
FAQ
What is the maximum input voltage rating for the LM2672MX-5.0/NOPB?
The absolute maximum input voltage for the LM2672MX-5.0/NOPB is 45 V, but the recommended operating range is 6.5 V to 40 V per TI SNVS136L. Operation above 40 V risks exceeding safe operating area limits and may trigger thermal shutdown or degrade long-term reliability. For automotive load-dump scenarios up to 40 V, the LM2672MX-5.0/NOPB remains within specification when used with appropriate input filtering.
Does the LM2672MX-5.0/NOPB require external feedback resistors?
No, the LM2672MX-5.0/NOPB does not require external feedback resistors. Its FB pin is internally connected to a precision voltage divider set for 5.0 V output, enabling direct connection to the output capacitor. This eliminates resistor tolerance errors and layout sensitivity associated with external networks - a key distinction from the adjustable LM2672MX-ADJ variant.
Can the LM2672MX-5.0/NOPB be synchronized to an external clock?
Yes, the LM2672MX-5.0/NOPB supports external synchronization via its SYNC pin. When driven with a TTL/CMOS-compatible signal >275 kHz, the internal 260-kHz oscillator locks to the external clock. This allows EMI spectrum shaping and multi-regulator phase alignment. Note that frequency foldback protection is disabled during sync mode, so short-circuit response relies solely on current limiting.
What is the thermal resistance (θJA) of the LM2672MX-5.0/NOPB in SOIC-8 package?
The junction-to-ambient thermal resistance (θJA) for the LM2672MX-5.0/NOPB in SOIC-8 (D package) is 105°C/W, measured on a standard 4-layer JEDEC board per TI SNVS136L. This value assumes proper PCB copper pour on GND pins and minimal trace length for VIN/VSW paths. In real-world layouts with 2-oz copper and thermal vias, actual θJA can improve to ~70°C/W, enabling 1-A operation without forced air cooling.
Is the LM2672MX-5.0/NOPB RoHS-compliant and lead-free?
Yes, the LM2672MX-5.0/NOPB is RoHS-compliant and lead-free, as indicated by the "/NOPB" suffix per Texas Instruments' packaging nomenclature. It meets JEDEC J-STD-020 moisture sensitivity level (MSL) 3 requirements and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards. Full compliance documentation is available in TI's official product change notices.
LM2672MX-5.0/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):
- 5V
- 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-5.0/NOPB FAQ
1.How can I place an order for LM2672MX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2672MX-5.0/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-5.0/NOPB reliable?
The price and inventory of LM2672MX-5.0/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-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2672MX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2672MX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2672MX-5.0/NOPB?
LM2672MX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2672MX-5.0/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-5.0/NOPB?
For technical support, including LM2672MX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2672MX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2672MX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2672MX-5.0/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-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2672MX-5.0/NOPB?
All LM2672MX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2672MX-5.0/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-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2672MX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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