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Texas Instruments LM2674LDX-5.0/NOPB
- Part No.:
- LM2674LDX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LM2674LDX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 500MA 16WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,522
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Product details
Overview
LM2674LDX-5.0/NOPB from Texas Instruments is a monolithic non-synchronous step-down DC-DC converter delivering 500mA at fixed 5.0V output, with 8V–40V input range, 260kHz fixed-frequency operation, ±1.5% output voltage tolerance, and integrated 0.25Ω DMOS switch. It serves as a high-efficiency (>90%) primary power regulator in industrial and embedded systems requiring compact, low-component-count buck conversion.
For engineers reviewing the LM2674LDX-5.0/NOPB datasheet, LM2674LDX-5.0/NOPB pinout, LM2674LDX-5.0/NOPB application, or LM2674LDX-5.0/NOPB equivalent, key selection considerations include its SOIC-8 package compatibility, TTL shutdown capability (50μA standby), thermal/overcurrent protection, and fixed 5V output eliminating external feedback resistors.
Technical Context
The LM2674LDX-5.0/NOPB implements a voltage-mode control architecture with internal frequency compensation and a fixed 260kHz oscillator, enabling stable regulation without external compensation components. Its non-synchronous topology uses an internal high-side DMOS switch and requires only an external Schottky diode, inductor, and two capacitors.
It operates across –40°C to +125°C junction temperature, supports enable-controlled shutdown via the ON/OFF pin (1.4V threshold), and integrates current limiting (0.62–1.2A typical) and thermal shutdown for fault protection-no external sensing or control logic required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over line/load/temperature - eliminates need for feedback resistor network and ensures precise rail compliance. |
| Max Output Current | 500 mA DC - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained designs. |
| Input Voltage Range | 8 V to 40 V - supports wide-input industrial supplies, battery-backed systems, and automotive off-battery rails. |
| Switching Frequency | 260 kHz (±10%) - enables use of small, standard inductors (e.g., 47 µH) and reduces EMI compared to lower-frequency alternatives. |
| Efficiency | 90% at VIN = 12 V, IOUT = 500 mA - minimizes thermal load; PCB copper traces suffice as heat sink under full load. |
| Quiescent Current | 3.6 mA active, 50 µA shutdown - enables low-power operation in always-on subsystems with fast wake-up. |
| RDS(ON) | 0.25 Ω (typ.) - reduces conduction loss and improves efficiency at mid-to-high load currents. |
Pinout & Package
LM2674LDX-5.0/NOPB is housed in an 8-pin SOIC (D) package (4.9 mm × 6 mm), with exposed pad not present. Pin functions are validated per TI SNVS007I Rev JUNE 2025.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB (Pin 1) | Bootstrap capacitor connection | Connects 10-nF ceramic capacitor to VSW to drive high-side DMOS gate; critical for proper switch turn-on. |
| NC (Pins 2, 3) | No-connect | Internally unconnected; must remain floating or grounded per layout best practice-no routing or loading. |
| FB (Pin 4) | Feedback sense input | Internally tied to 5V output; no external divider needed-simplifies design and improves accuracy vs adjustable versions. |
| ON/OFF (Pin 5) | Enable control input | TTL-compatible; >1.4 V enables regulation, <0.8 V disables with 50 µA standby-supports system-level power sequencing. |
| VSW (Pin 8) | Switch node output | Drives external inductor and Schottky diode cathode; high dv/dt node requiring tight layout and minimal trace area. |
| GND (Pin 6) | Power ground | Main return path for input/output capacitors and switch current; must connect to low-impedance system ground plane. |
| VIN (Pin 7) | Input supply | Accepts 8–40 V; requires local high-frequency bypass (e.g., 22 µF tantalum) with short GND path to minimize noise injection. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5V output | Eliminates external feedback resistors, reducing BOM count, layout complexity, and potential drift errors. |
| Integrated 0.25Ω DMOS switch | Reduces conduction losses and simplifies thermal management-no discrete MOSFET or driver required. |
| 260kHz fixed-frequency oscillator | Enables predictable EMI filtering and consistent inductor sizing across designs without frequency tuning. |
| TTL shutdown with 50µA standby | Supports low-power sleep modes in battery-powered or energy-conscious applications without auxiliary circuitry. |
| Thermal + current limit protection | Self-protects during overload, short-circuit, or elevated ambient-no external fault monitoring needed. |
Applications
| Industrial Power Supply | Embedded Controller Rail |
|---|---|
Use Scenario: Converting 24V factory bus to clean 5V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing stable 5V at up to 500mA with minimal external parts. Use Value: High efficiency (>90%) reduces heat buildup in enclosed enclosures; wide 8–40V input accommodates brownout and surge conditions. | Use Scenario: Powering ARM Cortex-M microcontrollers, ADCs, and UART transceivers on compact edge-node PCBs. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter delivering regulated 5V with fast transient response and low quiescent current. Use Value: SOIC-8 footprint and 5-pin active layout simplify routing; ON/OFF pin enables MCU-controlled power gating. |
| Automotive Off-Battery System | Test Equipment Auxiliary Rail |
Use Scenario: Generating 5V from vehicle 12V/24V battery (with transient suppression) for infotainment USB hubs or CAN transceivers. IC Role / Device Role / Timing Role: Robust buck regulator handling cold-crank (6.5V) and load-dump (40V) extremes per ISO 16750. Use Value: 8–40V input range and thermal shutdown ensure reliability across automotive temperature and stress profiles. | Use Scenario: Providing isolated 5V bias for precision op-amps and reference buffers in benchtop DMMs or signal generators. IC Role / Device Role / Timing Role: Low-noise, well-regulated secondary supply decoupled from main SMPS using LC filtering. Use Value: Fixed 5V output and ±1.5% tolerance meet metrology-grade stability requirements without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2675SD-5.0/NOPB | Same pinout, higher 1A output current, improved efficiency (92%), but larger SOIC-8 package (6.2mm × 7.5mm). | Suitable where higher load headroom or margin is required; not drop-in due to different thermal pad and footprint. | Select when future-proofing for >500mA loads or tighter thermal constraints; verify PCB land pattern compatibility. |
| TPS5430DDAR | 3A synchronous buck, 5.5–36V input, adjustable output; requires external feedback resistors and has different pinout. | Better for high-current or dynamically adjustable rails; lacks fixed 5V option and adds design complexity. | Choose for scalability beyond 500mA or when synchronous rectification is mandatory for peak efficiency. |
Compared with LM2674LDX-5.0/NOPB, LM2675SD-5.0/NOPB offers higher current capacity in a mechanically distinct SOIC-8, while TPS5430DDAR provides synchronous operation and flexibility at the cost of added external components and layout redesign.
Availability
LM2674LDX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, embedded controller power, automotive off-battery systems, and test equipment requiring stable component supply with long-term manufacturability.
Supply support for LM2674LDX-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 LM2674 series was designed as part of TI's SIMPLE SWITCHER® portfolio to deliver easy-to-use, high-efficiency step-down regulators for cost-sensitive industrial and embedded applications requiring minimal external components.
FAQ
What is the maximum input voltage rating for LM2674LDX-5.0/NOPB?
The absolute maximum input voltage for LM2674LDX-5.0/NOPB is 45 V, but the recommended operating range is 8 V to 40 V. Operation above 40 V risks exceeding safe operating area limits and may trigger internal protection circuits. For sustained reliability, maintain VIN ≤ 40 V under all conditions including transients.
Does LM2674LDX-5.0/NOPB require external feedback resistors?
No. LM2674LDX-5.0/NOPB is a fixed 5.0V output variant-the FB pin is internally connected to the regulated output, eliminating the need for external feedback resistors. This simplifies design, improves output accuracy, and reduces component count versus adjustable versions like LM2674MX-ADJ/NOPB.
What package type does LM2674LDX-5.0/NOPB use?
LM2674LDX-5.0/NOPB uses the 8-pin SOIC (D) package, measuring 4.9 mm × 6 mm. It is not the WSON or PDIP variant-this specific orderable part is exclusively offered in SOIC-8 with standard gull-wing leads and no exposed thermal pad.
Can LM2674LDX-5.0/NOPB be used in automotive applications?
Yes. LM2674LDX-5.0/NOPB supports –40°C to +125°C junction temperature and handles 8–40V input, covering cold-crank (≥6.5V) and load-dump (≤40V) conditions defined in ISO 16750. Its integrated thermal shutdown and current limiting provide robustness for automotive off-battery subsystems when paired with appropriate front-end protection.
What is the typical efficiency of LM2674LDX-5.0/NOPB at full load?
LM2674LDX-5.0/NOPB achieves 90% typical efficiency at VIN = 12 V and IOUT = 500 mA, as specified in Section 5.6 of the TI SNVS007I datasheet. Efficiency remains >86% across 8–40V input range and 20–500mA load, enabling thermally passive operation on standard PCB copper.
LM2674LDX-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 16-WFDFN Exposed Pad
- 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:
- 500mA
- Frequency - Switching:
- 260kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WSON (5x5)
LM2674LDX-5.0/NOPB FAQ
1.How can I place an order for LM2674LDX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2674LDX-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 LM2674LDX-5.0/NOPB reliable?
The price and inventory of LM2674LDX-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 LM2674LDX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2674LDX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2674LDX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2674LDX-5.0/NOPB?
LM2674LDX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2674LDX-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 LM2674LDX-5.0/NOPB?
For technical support, including LM2674LDX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2674LDX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2674LDX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2674LDX-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 LM2674LDX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2674LDX-5.0/NOPB?
All LM2674LDX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2674LDX-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 LM2674LDX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2674LDX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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