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Texas Instruments LM2674M-5.0/NOPB
- Part No.:
- LM2674M-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2674M-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,789
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Product details
Overview
LM2674M-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 primary power stage in industrial power supplies requiring compact, high-efficiency regulation.
For engineers reviewing the LM2674M-5.0/NOPB datasheet, LM2674M-5.0/NOPB pinout, LM2674M-5.0/NOPB application, or LM2674M-5.0/NOPB equivalent, key selection criteria include input voltage headroom, thermal performance in SOIC-8, shutdown current (50μA), efficiency at 500mA load, and compatibility with standard off-the-shelf inductors and Schottky diodes.
Technical Context
The LM2674M-5.0/NOPB implements a voltage-mode control architecture with internal frequency compensation and a fixed 260kHz oscillator. Its feedback loop regulates output by comparing FB pin voltage to an internal 1.21V reference-though for this fixed 5.0V variant, FB is internally tied to output, eliminating external resistor dividers.
It integrates a high-side DMOS switch with current limiting and thermal shutdown, operates in active mode when ON/OFF ≥1.4V, and enters low-power shutdown (<100μA) when ON/OFF <0.8V. The bootstrap capacitor (CB) enables gate drive for the high-side switch, requiring a 10nF ceramic capacitor between CB and VSW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1.5% over line, load, and temperature (–40°C to 125°C) |
| Max Output Current | 500mA DC continuous; current limit threshold 0.62–1.2A (temp-dependent) |
| Input Voltage Range | 6.5V to 40V - supports 12V/24V industrial rails and battery-backed systems |
| Switching Frequency | 260kHz fixed - enables use of compact 22–68μH inductors and reduces EMI filtering burden |
| Efficiency | 90% typical at VIN=12V, IOUT=500mA - minimizes board-level heat sinking |
| RDS(ON) | 0.25Ω typical at 25°C - limits conduction loss in high-side switch |
| Quiescent Current | 3.6mA typical in active mode; 50μA standby in shutdown - supports low-power sleep states |
Pinout & Package
LM2674M-5.0/NOPB is packaged in an 8-pin SOIC (D package), 4.9mm × 6mm body, with exposed pad not present (unlike WSON). Thermal performance relies on PCB copper area adjacent to GND pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CB) | Bootstrap capacitor connection | Connects 10nF ceramic cap to VSW; enables high-side gate drive voltage above VIN |
| 2, 3 (NC) | No-connect | Must remain unconnected; no internal circuitry or bond wire attached |
| 4 (FB) | Feedback input | Internally connected to output for fixed 5.0V version; no external divider required |
| 5 (ON/OFF) | Enable control input | TTL-compatible; ≥1.4V = active, ≤0.8V = shutdown; internal pull-up allows floating-for-always-on |
| 6 (GND) | Power ground | Main return path for input/output capacitors and IC substrate; shortest possible trace to CIN |
| 7 (VIN) | Input supply | Accepts 6.5–40V; requires local high-frequency bypass capacitor (e.g., 22μF tantalum + 0.1μF ceramic) |
| 8 (VSW) | Switch node | Drain of internal DMOS; connects to inductor and Schottky diode cathode - high dv/dt node requiring tight layout |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-output simplicity | 5.0V version eliminates feedback resistors and associated layout sensitivity - reduces BOM count to 5 external parts |
| Thermal protection | Integrated thermal shutdown activates at ~150°C junction temperature - prevents damage during overload or poor heatsinking |
| Low-standby power | 50μA shutdown current enables battery-powered applications with extended sleep duration without significant drain |
| Robust fault handling | Combined cycle-by-cycle current limiting and frequency foldback under short-circuit - protects switch and external components |
| SOIC-8 manufacturability | Standard 8-pin SOIC footprint supports automated assembly and rework; compatible with IPC-7351B land patterns |
Applications
| Industrial PLC Power Rail | Automotive Body Control Module |
|---|---|
Use Scenario: Provides stable 5.0V rail for microcontrollers and I/O drivers in programmable logic controllers operating from 12–24V DC bus. IC Role / Device Role / Timing Role: Primary buck regulator converting unregulated vehicle or factory bus voltage to clean 5V logic supply. Use Value: 90% efficiency at 500mA reduces thermal stress on PCB; ±1.5% tolerance ensures reliable MCU reset and ADC reference stability. | Use Scenario: Powers CAN transceivers, sensor interfaces, and small microcontrollers in automotive body electronics with wide input transients (load dump up to 40V). IC Role / Device Role / Timing Role: Input-stage DC-DC converter accepting 8–40V automotive supply and delivering regulated 5V to downstream logic. Use Value: 40V absolute max rating and built-in thermal/current protection withstand ISO 7637-2 pulses; 260kHz switching avoids AM radio band interference. |
| Point-of-Load for FPGA Core | Medical Sensor Interface Supply |
Use Scenario: Generates 5.0V for FPGA configuration and auxiliary logic in portable diagnostic equipment where space and heat are constrained. IC Role / Device Role / Timing Role: Compact, self-contained buck converter replacing linear regulators to improve system efficiency and reduce thermal footprint. Use Value: SOIC-8 package fits dense layouts; 500mA output supports moderate FPGA I/O banks; 260kHz frequency simplifies EMI filter design. | Use Scenario: Supplies isolated 5V rail for analog front-end amplifiers and ADCs in battery-operated patient monitors requiring low noise and long runtime. IC Role / Device Role / Timing Role: Efficient intermediate regulator stepping down from 12V main battery to low-noise 5V analog domain supply. Use Value: 50μA shutdown current extends battery life in standby; fixed 5V output eliminates resistor tolerance errors affecting analog accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2675M-5.0/NOPB | Higher 1A output current; same pinout, 260kHz, but larger die and higher RDS(ON) (0.35Ω) | Supports heavier loads; requires larger inductor and output capacitor | Select when >500mA peak load or higher transient margin is required |
| TPS54302DDCR | Synchronous 3A buck; 2.5–6V input; 500kHz–2.2MHz adjustable frequency; smaller 6-pin SOT-23 | Not pin-compatible; requires different layout, feedback network, and external MOSFETs omitted | Choose for higher efficiency at light loads or space-constrained designs needing >500mA |
Compared with LM2674M-5.0/NOPB, LM2675M-5.0/NOPB offers higher current headroom in identical SOIC-8 packaging, while TPS54302DDCR delivers synchronous efficiency and frequency flexibility at the cost of redesign effort and loss of direct drop-in capability.
Availability
LM2674M-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, medical instrumentation, and embedded computing applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for LM2674M-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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies since 1930.
The LM2674 series belongs to TI's SIMPLE SWITCHER® portfolio, designed specifically for ease-of-use in cost-sensitive, medium-power DC-DC conversion applications where minimal external components and proven reliability are critical.
FAQ
What is the maximum input voltage rating for LM2674M-5.0/NOPB?
The LM2674M-5.0/NOPB has an absolute maximum input voltage rating of 45V, with recommended operating range from 6.5V to 40V. Operation beyond 40V risks exceeding safe operating area limits and may trigger internal protection circuits. For automotive applications with load dump transients, ensure input filtering clamps voltage below 45V before the VIN pin.
Does LM2674M-5.0/NOPB require external feedback resistors?
No. The LM2674M-5.0/NOPB is a fixed 5.0V output variant - its internal feedback network is pre-configured, and the FB pin is internally connected to the output. External resistors are unnecessary and must not be added, as they would disrupt regulation. Only the adjustable version (e.g., LM2674MX-ADJ) requires an external resistor divider.
What is the thermal resistance (RθJA) of LM2674M-5.0/NOPB in SOIC-8 package?
The LM2674M-5.0/NOPB in SOIC-8 (D package) has a junction-to-ambient thermal resistance (RθJA) of 105°C/W under standard JEDEC test conditions (1 in² copper pad). Actual thermal performance improves significantly with additional PCB copper area and thermal vias connected to the GND pins - typical designs achieve <60°C/W with 2–3 cm² of 2-oz copper.
Can LM2674M-5.0/NOPB be used in synchronous rectification configurations?
No. The LM2674M-5.0/NOPB is a non-synchronous buck controller with an integrated high-side DMOS switch and requires an external Schottky catch diode. It does not support synchronous rectification - no gate drive signal is provided for a low-side MOSFET. For synchronous operation, consider TI's TPS54302 or LM2677 families instead.
What is the minimum recommended output capacitor for LM2674M-5.0/NOPB?
TI specifies a minimum 47μF output capacitor for the LM2674M-5.0/NOPB in typical 5V applications (e.g., VIN=12V, IOUT=500mA), using low-ESR tantalum or polymer types. Smaller values risk excessive output ripple (>100mVpp) and instability; larger values (e.g., 100–150μF) improve transient response and reduce ripple further, especially under dynamic load steps.
LM2674M-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:
- 500mA
- Frequency - Switching:
- 260kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2674M-5.0/NOPB FAQ
1.How can I place an order for LM2674M-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2674M-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 LM2674M-5.0/NOPB reliable?
The price and inventory of LM2674M-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 LM2674M-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2674M-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2674M-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2674M-5.0/NOPB?
LM2674M-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2674M-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 LM2674M-5.0/NOPB?
For technical support, including LM2674M-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2674M-5.0/NOPB requirements.
6.How does Aetrix verify that LM2674M-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2674M-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 LM2674M-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2674M-5.0/NOPB?
All LM2674M-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2674M-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 LM2674M-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2674M-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2674M-5.0/NOPB Tags
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