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Texas Instruments LM2672M-5.0/NOPB
- Part No.:
- LM2672M-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2672M-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,757
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Product details
Overview
LM2672M-5.0/NOPB from Texas Instruments is a monolithic 1-A step-down (buck) DC-DC voltage regulator in an 8-pin SOIC package, delivering a fixed 5-V output with ±1.5% tolerance over line and load, 90% efficiency at 12-V input/1-A load, and operation across 8–40-V input range. It integrates a DMOS power MOSFET switch, 260-kHz fixed-frequency oscillator, soft-start, TTL-compatible ON/OFF control, and thermal/current protection - used in industrial power supplies and embedded system rails.
For engineers reviewing the LM2672M-5.0/NOPB datasheet, LM2672M-5.0/NOPB pinout, LM2672M-5.0/NOPB application, or LM2672M-5.0/NOPB equivalent, key selection criteria include verified 1-A continuous output capability, 260-kHz switching frequency for compact filter design, ±1.5% output voltage accuracy, 50-μA standby current under shutdown, and SOIC-8 thermal performance (RθJA = 105°C/W).
Technical Context
The LM2672M-5.0/NOPB implements a synchronous-free buck topology using an internal DMOS high-side switch and external Schottky catch diode. Its 260-kHz fixed-frequency PWM controller features internal frequency compensation and cycle-by-cycle current limiting with foldback during overload.
Functional modes include active regulation (ON/OFF ≥1.4 V), low-power shutdown (ON/OFF ≤1.4 V, 50-μA IQ), and soft-start via external capacitor on SS pin. The FB pin is internally connected to the 5-V output divider, eliminating external feedback resistors - unlike the adjustable version which requires external resistor networks.
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 rail compliance without trimming. |
| Max Output Current | 1 A continuous - supports single-rail microcontroller, FPGA I/O, or sensor subsystems without derating at 25°C. |
| Switching Frequency | 260 kHz (±10%) - enables use of standard 47–68 μH shielded inductors and reduces EMI filtering burden vs. lower-frequency alternatives. |
| Efficiency | 90% at VIN = 12 V, IOUT = 1 A - minimizes board-level heat generation; copper traces suffice as sole heatsink per TI design guidance. |
| Quiescent Current | 3.6 mA typical in active mode; 50 μA in shutdown - extends battery life in always-on systems with enable control. |
| Input Voltage Range | 6.5 V to 40 V - accommodates 12-V and 24-V industrial bus inputs, including automotive cold-crank transients down to 6.5 V. |
| Thermal Resistance | RθJA = 105°C/W (SOIC-8) - defines junction-to-ambient rise under PCB layout per JEDEC 4-layer standard. |
Pinout & Package
LM2672M-5.0/NOPB is packaged in an 8-pin SOIC (D package) with 5.00 mm × 6.20 mm body size and standard 1.27-mm pitch. Thermal pad is not present; power dissipation relies on copper pour under exposed leads and GND pins.
| 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 | External capacitor to GND sets output voltage ramp time - prevents inrush current; floating disables soft-start. |
| 3 (SYNC) | Frequency synchronization input | Accepts external TTL/CMOS clock >275 kHz to lock switching frequency - enables EMI reduction and multi-regulator phase alignment. |
| 4 (FB) | Feedback sense input | Internally tied to 5-V divider - direct connection to output capacitor provides regulation; no external resistors required. |
| 5 (ON/OFF) | Enable/disable control | TTL-compatible input: ≥1.4 V enables regulation; ≤0.8 V forces 50-μA shutdown - supports microcontroller GPIO control. |
| 6 (GND) | Power ground | Primary return path for input/output capacitors and inductor - must be short, low-impedance trace to minimize noise and thermal resistance. |
| 7 (VIN) | Main power input | Accepts 6.5–40 V DC; connects to high-frequency bypass capacitor (22 μF tantalum) - path to CIN and GND must be shortest possible. |
| 8 (VSW) | Switch node output | Drives external Schottky diode cathode and inductor - high dv/dt node requiring tight layout; connects to CB capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS power switch | Enables 1-A output with <0.3 Ω RDS(ON) at 25°C - eliminates external MOSFET and simplifies BOM for cost-sensitive designs. |
| Fixed 5-V output with internal feedback | Removes need for external resistor divider - reduces component count, layout area, and calibration drift vs. adjustable regulators. |
| 260-kHz fixed-frequency PWM | Allows consistent filter design using off-the-shelf 47–68 μH inductors and avoids subharmonic oscillation without slope compensation. |
| TTL shutdown with 50-μA standby | Supports low-power sleep modes in portable or remote devices - ON/OFF pin compatible with 3.3-V and 5-V logic families. |
| Thermal shutdown + current limit | Protects against sustained overload or ambient overheating - automatic recovery after fault removal; no latch-up behavior. |
Applications
| Industrial PLC Power Rail | Automotive Body Control Module |
|---|---|
Use Scenario: Provides clean 5-V supply for microcontroller, CAN transceiver, and analog sensors in programmable logic controllers operating from 24-V DC bus. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24-V bus to isolated 5-V logic rail with ripple <50 mVpp. Use Value: 90% efficiency minimizes thermal stress in sealed enclosures; ±1.5% output tolerance ensures reliable ADC reference and digital I/O operation. |
Use Scenario: Powers infotainment MCU and peripheral ICs in vehicle body control units fed from 12-V battery with cold-crank support down to 6.5 V. IC Role / Device Role / Timing Role: Buck converter delivering regulated 5-V rail during engine start transient events. Use Value: Wide 6.5–40-V input range withstands load-dump and cranking dips; 50-μA shutdown current preserves battery during vehicle sleep mode. |
| Point-of-Sale Terminal Power | Network Edge Device DC-DC Stage |
Use Scenario: Generates 5-V supply for ARM-based payment terminal running from 12-V wall adapter, requiring low-noise operation near touchscreens. IC Role / Device Role / Timing Role: High-efficiency intermediate regulator before LDO post-regulation for noise-sensitive peripherals. Use Value: 260-kHz switching allows small 47-μH inductor and 47-μF output capacitor - reduces footprint while maintaining <100-mV ripple. |
Use Scenario: Supplies 5-V rail to Ethernet PHY and PoE interface ICs in compact network switches with limited board space. IC Role / Device Role / Timing Role: Compact, self-contained buck stage replacing discrete FET+controller solutions. Use Value: Only 5 external components required (inductor, diode, 2 caps, bootstrap cap) - accelerates design and reduces assembly cost vs. controller-based alternatives. |
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-5.0/NOPB | Same electrical specs; tape-and-reel packaging (vs. tube for LM2672M-5.0/NOPB) - identical SOIC-8 footprint and thermal performance. | No functional difference; optimized for automated SMT placement in high-volume production. | Select LM2672MX-5.0/NOPB when ordering >2,500 units or requiring machine-ready reels. |
| LM2596T-5.0 | 3-A rated, 150-kHz switching, larger TO-220-5 package - higher current but lower frequency increases inductor size and reduces light-load efficiency. | Better suited for 2–3 A loads; less suitable for space-constrained PCBs due to through-hole mounting and thermal pad requirements. | Choose LM2596T-5.0 only if >1 A output current is required and board area permits TO-220 layout. |
Compared with LM2672MX-5.0/NOPB, the LM2672M-5.0/NOPB offers identical regulation performance but requires manual or tray-based placement; versus LM2596T-5.0, it delivers superior power density and light-load efficiency at the expense of peak current capability.
Availability
LM2672M-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, point-of-sale terminals, and network infrastructure requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2672M-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 over 90 years of innovation in high-reliability silicon design.
The LM2672M-5.0/NOPB belongs to TI's SIMPLE SWITCHER® family - engineered for ease-of-use in cost-sensitive, medium-power DC-DC conversion where minimal external components and proven reliability are critical.
FAQ
What is the maximum input voltage rating for the LM2672M-5.0/NOPB?
The LM2672M-5.0/NOPB has an absolute maximum input voltage rating of 45 V, with recommended operation from 6.5 V to 40 V. Exceeding 40 V continuously risks exceeding thermal limits or triggering internal protection; operation up to 45 V is permissible only for short-duration transients such as automotive load dump.
Does the LM2672M-5.0/NOPB require external feedback resistors to set its output voltage?
No - the LM2672M-5.0/NOPB is a fixed-output variant with internal resistor divider network tied to the FB pin. Unlike the adjustable LM2672MX-ADJ, it requires no external resistors; the FB pin is connected directly to the output capacitor for regulation.
Can the LM2672M-5.0/NOPB synchronize to an external clock signal?
Yes - the LM2672M-5.0/NOPB includes a SYNC pin (Pin 3) that accepts TTL- or CMOS-compatible external clocks above 275 kHz. When driven, it locks the internal 260-kHz oscillator to the external frequency, enabling EMI control and multi-regulator phase alignment.
What is the thermal performance of the LM2672M-5.0/NOPB in SOIC-8 package?
The LM2672M-5.0/NOPB in SOIC-8 (D package) has a junction-to-ambient thermal resistance (RθJA) of 105°C/W on a standard JEDEC 4-layer board. At 1-A load and 12-V input, typical power dissipation is ~0.5 W, resulting in ~53°C junction rise above ambient - well within the 125°C max operating temperature.
How does the ON/OFF pin function on the LM2672M-5.0/NOPB?
The ON/OFF pin (Pin 5) enables or disables regulation: voltage ≥1.4 V activates the device; ≤0.8 V places it in shutdown with 50-μA quiescent current. It features an internal 20-μA pull-up and 7-V Zener clamp - no external pull-up is needed unless driving from open-drain logic.
LM2672M-5.0/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):
- 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
LM2672M-5.0/NOPB FAQ
1.How can I place an order for LM2672M-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2672M-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 LM2672M-5.0/NOPB reliable?
The price and inventory of LM2672M-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 LM2672M-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2672M-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2672M-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2672M-5.0/NOPB?
LM2672M-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2672M-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 LM2672M-5.0/NOPB?
For technical support, including LM2672M-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2672M-5.0/NOPB requirements.
6.How does Aetrix verify that LM2672M-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2672M-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 LM2672M-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2672M-5.0/NOPB?
All LM2672M-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2672M-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 LM2672M-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2672M-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2672M-5.0/NOPB Tags
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