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Texas Instruments LM2675MX-5.0/NOPB
- Part No.:
- LM2675MX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2675MX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,597
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Product details
Overview
LM2675MX-5.0/NOPB from Texas Instruments is a monolithic step-down (buck) DC-DC switching regulator delivering 5 V at up to 1 A output current, with ±1.5% output voltage tolerance, 260 kHz fixed-frequency operation, and 90% efficiency at 12 V input/1 A load. It integrates a DMOS power MOSFET switch, internal frequency compensation, and thermal/current protection-designed for compact, high-efficiency power conversion in industrial and embedded systems.
For engineers reviewing the LM2675MX-5.0/NOPB datasheet, LM2675MX-5.0/NOPB pinout, LM2675MX-5.0/NOPB application, or LM2675MX-5.0/NOPB equivalent, key selection criteria include its 8-pin SOIC package, 6.5–40 V input range, TTL-compatible ON/OFF control, bootstrapped high-side gate drive, and minimal external component count (5 total).
Technical Context
The LM2675MX-5.0/NOPB implements a synchronous-free buck topology using an integrated DMOS high-side switch and external Schottky catch diode. Its 260 kHz oscillator enables use of small, low-ESR ceramic or tantalum output capacitors and standard off-the-shelf inductors (e.g., 33–68 µH), while internal frequency compensation eliminates need for external loop compensation components.
It operates in continuous conduction mode (CCM) across full 1 A load range at typical input voltages, with cycle-by-cycle current limiting, thermal shutdown, and <50 µA standby current during TTL shutdown-enabling robust, self-protected operation without auxiliary monitoring circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over line/load/temperature - ensures stable rail for microcontrollers, sensors, and logic without external feedback resistors. |
| Max Output Current | 1 A continuous - supports single-rail powering of mid-power peripherals (e.g., RS-485 transceivers, ADCs, small FPGAs). |
| Input Voltage Range | 6.5 V to 40 V - accommodates wide-input industrial supplies (e.g., 12 V, 24 V, 36 V nominal buses) with margin for transients. |
| Switching Frequency | 260 kHz (±10%) - balances EMI control and passive size; allows use of low-cost, non-shielded inductors and 47–68 µF output capacitance. |
| Efficiency | 90% at VIN = 12 V, IOUT = 1 A - minimizes thermal load; PCB copper traces suffice as sole heatsink under full load. |
| Quiescent Current | 3.6 mA active, 50 µA standby - enables low-power sleep modes in battery-backed or energy-conscious systems. |
| Protection Features | Thermal shutdown, cycle-by-cycle current limit, and undervoltage lockout - prevent damage during overload, short-circuit, or brownout conditions. |
Pinout & Package
LM2675MX-5.0/NOPB is supplied in an 8-pin SOIC (D package), 4.9 mm × 6.0 mm body with standard 1.27 mm pitch. Thermal performance relies on PCB copper area connected to GND pins (pins 6 and 7); no exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CB) | Bootstrap capacitor connection | Connects 470 nF ceramic capacitor between CB and VSW to bias high-side gate driver; critical for MOSFET turn-on reliability. |
| 2, 3 (NC) | No-connect | Unbonded; must remain unconnected and unstubbed to avoid parasitic coupling or EMI. |
| 4 (FB) | Feedback sense input | Internally tied to 5 V output; no external divider needed-direct connection to output capacitor maintains regulation accuracy. |
| 5 (ON/OFF) | Enable control input | TTL-compatible: ≥1.4 V = active, ≤0.8 V = shutdown; draws only 20 µA in standby-ideal for microcontroller GPIO control. |
| 6, 7 (GND) | Power ground | Dual GND pins reduce ground impedance; connect both directly to low-impedance system ground plane near CIN and COUT. |
| 8 (VSW) | Switch node output | High dv/dt switching node (0 V to VIN); route with minimal loop area to inductor and diode cathode to suppress EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS power switch | 0.3 Ω RDS(on) at 25°C enables 1 A output with <300 mW conduction loss-eliminates need for external high-side MOSFET and driver. |
| Patented internal frequency compensation | Removes requirement for external compensation network-reduces BOM count and layout sensitivity while ensuring stability across all operating conditions. |
| Minimal external component count | Only 5 components required: input cap, output cap, inductor, catch diode, and bootstrap cap-accelerates design cycle and improves manufacturing yield. |
| TTL shutdown with ultra-low standby current | 50 µA max standby current at 25°C allows seamless integration into low-power wake/sleep architectures without auxiliary LDOs or enable sequencing. |
| Robust fault protection | Combines cycle-by-cycle current limiting, thermal shutdown, and UVLO-prevents latch-up or destruction during startup, overload, or ambient temperature excursions. |
Applications
| Industrial PLC I/O Module Power | Embedded Controller Core Rail |
|---|---|
|
Use Scenario: Providing isolated 5 V rail for digital I/O conditioning circuits in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary non-isolated buck converter stepping down 24 V field bus to clean 5 V for optocoupler drivers and level translators. Use Value: 90% efficiency prevents thermal derating in confined enclosures; 6.5–40 V input range tolerates 24 V bus sag and surge per IEC 61000-4-5. |
Use Scenario: Generating main 5 V supply for ARM Cortex-M7 microcontrollers and peripheral interfaces in edge gateway devices. IC Role / Device Role / Timing Role: Central point-of-load regulator delivering regulated 5 V to MCU VDD, USB PHY, and Ethernet MAC. Use Value: Fixed 5 V output eliminates feedback resistor errors; 1 A capacity supports burst-mode CPU loads and simultaneous peripheral activation. |
| Point-of-Load for Fieldbus Transceivers | Pre-regulator for Linear Post-Regulation |
|
Use Scenario: Powering RS-485/RS-422 transceivers in distributed sensor networks where EMI and thermal constraints limit solution size. IC Role / Device Role / Timing Role: Compact, low-noise buck stage preceding local LDOs to supply transceiver VCC and driver rails. Use Value: 260 kHz switching enables small 33 µH inductor and 47 µF output cap-fits within 1 cm² footprint while maintaining <50 mVpp ripple. |
Use Scenario: Efficiently reducing 12 V or 24 V system rail to ~6 V before linear regulation to noise-sensitive analog circuits (e.g., precision ADCs, DACs). IC Role / Device Role / Timing Role: High-efficiency preregulator minimizing power dissipation in downstream linear regulators. Use Value: 90% efficiency cuts preregulator heat by >80% vs. direct linear drop; ±1.5% output tolerance ensures predictable headroom for LDO dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575HVS-5.0 | 5 A current rating, 52 kHz switching, TO-220/TO-263 package - higher power but larger size and lower frequency. | Better suited for >2 A loads or designs requiring lower EMI via reduced switching frequency. | Select when output current exceeds 1 A or thermal mass permits through-hole mounting. |
| TPS54202DR | 2 A output, 4.5–17 V input, 2.5 MHz switching, integrated high/low-side FETs - smaller passives but narrower input range. | Ideal for space-constrained 5 V rail generation from 12 V sources where PCB area is premium. | Choose for ultra-compact designs needing >1 A or higher switching frequency for faster transient response. |
Compared with LM2675MX-5.0/NOPB, LM2575HVS-5.0 offers higher current and rugged packaging at the cost of size and EMI filter complexity, while TPS54202DR delivers double the current and 10× higher frequency in a smaller QFN-but requires strict adherence to 4.5–17 V input limits and advanced layout practices.
Availability
LM2675MX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, embedded controller power, and fieldbus interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2675MX-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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM2675 series belongs to TI's SIMPLE SWITCHER® portfolio-designed specifically for ease-of-use, minimal external component count, and robust operation in industrial, automotive, and communications power systems.
FAQ
What is the recommended input capacitor for LM2675MX-5.0/NOPB?
The LM2675MX-5.0/NOPB datasheet specifies a 22 µF, 50 V tantalum capacitor (e.g., Sprague 199D series) as the minimum input bypass. This value provides adequate high-frequency decoupling for the 260 kHz switching node and handles peak input currents without excessive ripple or voltage droop during load transients.
Does LM2675MX-5.0/NOPB require an external feedback resistor network?
No. The LM2675MX-5.0/NOPB is a fixed 5 V output variant-its FB pin is internally connected to the 5 V output reference, so no external resistor divider is needed. Connecting FB directly to the output capacitor completes the regulation loop and ensures ±1.5% accuracy without calibration.
Can LM2675MX-5.0/NOPB operate with input voltage below 6.5 V?
No. The absolute minimum recommended input voltage for LM2675MX-5.0/NOPB is 6.5 V per the datasheet's Recommended Operating Conditions. Operation below this threshold may result in dropout, regulation failure, or undefined behavior due to insufficient headroom for the internal control circuitry and switch saturation.
What thermal considerations apply to LM2675MX-5.0/NOPB in SOIC package?
The LM2675MX-5.0/NOPB in SOIC (D package) has a junction-to-ambient thermal resistance (RθJA) of 105 °C/W on a standard 4-layer board with 1 in² copper. To maintain TJ < 125°C at 1 A, ensure ≥1 in² of 2-oz copper connected to both GND pins, minimize trace length to input/output caps, and avoid enclosing the IC in sealed housings without airflow.
Is LM2675MX-5.0/NOPB pin-compatible with other LM2675 variants?
Yes-LM2675MX-5.0/NOPB shares identical 8-pin SOIC pinout and electrical interface with all fixed-output LM2675 variants (e.g., LM2675MX-3.3/NOPB, LM2675MX-12/NOPB) and the adjustable version. Only the FB pin connection differs: fixed versions tie FB directly to output, while adjustable versions require a resistor divider.
LM2675MX-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
LM2675MX-5.0/NOPB FAQ
1.How can I place an order for LM2675MX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2675MX-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 LM2675MX-5.0/NOPB reliable?
The price and inventory of LM2675MX-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 LM2675MX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2675MX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2675MX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2675MX-5.0/NOPB?
LM2675MX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2675MX-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 LM2675MX-5.0/NOPB?
For technical support, including LM2675MX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2675MX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2675MX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2675MX-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 LM2675MX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2675MX-5.0/NOPB?
All LM2675MX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2675MX-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 LM2675MX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2675MX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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