My Inquiry
My Account
Texas Instruments LM2674M-12
- Part No.:
- LM2674M-12
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2674M-12.pdf
- Description:
- IC REG BUCK 12V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,248
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2674M-12 from Texas Instruments is a monolithic non-synchronous step-down DC-DC converter delivering 500mA output current with ±1.5% output voltage tolerance, 260kHz fixed switching frequency, and 8V–40V input range. It integrates a 0.25Ω DMOS switch and operates in buck topology for efficient voltage regulation in industrial power supplies.
For engineers reviewing the LM2674M-12 datasheet, LM2674M-12 pinout, LM2674M-12 application, or LM2674M-12 equivalent, key selection criteria include fixed 12V output, thermal shutdown protection, TTL-compatible enable control, and SOIC-8 package compatibility with standard PCB layout practices.
Technical Context
The LM2674M-12 implements a voltage-mode PWM controller with internal frequency compensation and a fixed 260kHz oscillator. Its feedback loop regulates output by comparing FB pin voltage to a precise 1.21V internal reference, enabling stable 12V output across line and load variations.
It features cycle-by-cycle current limiting (typ. 0.8A), thermal shutdown, and low-power standby mode (50μA) activated via the ON/OFF pin. The device uses external bootstrap capacitor (CB) and Schottky catch diode, requiring only five external components for full operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±1.5% over –40°C to +125°C and full load range; eliminates need for external feedback resistors. |
| Input Voltage Range | 8V to 40V; supports wide-range industrial and automotive battery-supplied systems without pre-regulation. |
| Max Output Current | 500mA DC; sufficient for powering microcontrollers, sensors, and analog circuitry in embedded systems. |
| Switching Frequency | 260kHz fixed; enables use of compact, low-cost inductors and reduces EMI compared to lower-frequency alternatives. |
| RDS(ON) | 0.25Ω at 25°C; minimizes conduction loss and improves efficiency up to 94% at 24VIN/12VOUT. |
| Quiescent Current | 3.6mA typical; ensures low no-load power draw in always-on applications. |
| Standby Current | 50μA typical when ON/OFF pin < 1.4V; supports energy-sensitive sleep modes. |
| Oscillator Tolerance | ±10%; ensures predictable timing for filter design and EMI management. |
Pinout & Package
LM2674M-12 is supplied in an 8-pin SOIC (D package), 4.9mm × 6mm body size with exposed pad not present. Pin functions are validated per TI SNVS007I Rev JUNE 2025.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CB | Bootstrap capacitor connection | Connects 10nF ceramic capacitor between CB and VSW to drive high-side FET gate; critical for proper switch turn-on. |
| 2,3 - NC | No connect | Unbonded pins; must remain unconnected and un-routed on PCB. |
| 4 - FB | Feedback sense input | Internally tied to output for fixed 12V version; shorting to VOUT completes regulation loop without external divider. |
| 5 - ON/OFF | Enable control input | TTL-compatible; >1.4V enables regulator, <0.8V disables it with 50μA standby current. |
| 6 - GND | Power ground | Main return path for input/output capacitors and IC core; requires short, low-impedance trace to minimize noise and thermal rise. |
| 7 - VIN | Input supply | Accepts 8–40V DC; connects to high-frequency bypass capacitor (CIN) with minimal loop area to suppress switching transients. |
| 8 - VSW | Switch node output | Drives external inductor and Schottky diode cathode; high dv/dt node requiring careful routing and grounding. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS switch | 0.25Ω RDS(ON) enables high-efficiency conversion without external MOSFET, reducing BOM count and layout complexity. |
| Internal frequency compensation | Patented compensation eliminates need for external compensation network, simplifying design and improving stability across operating conditions. |
| Thermal shutdown + current limit | Protects against sustained overload or ambient overheating; automatically recovers when fault condition clears. |
| Simple 5-component solution | Requires only input/output capacitors, inductor, Schottky diode, and bootstrap capacitor-no IC-level external compensation or timing components. |
| WEBENCH® Power Designer support | TI's online tool generates complete schematics, bill-of-materials, and performance simulations tailored to LM2674M-12 electrical and thermal constraints. |
Applications
| Industrial Sensor Node Power | Automotive Body Control Module |
|---|---|
Use Scenario: Powering 12V rail for temperature/humidity sensors, RS-485 transceivers, and low-power MCU in factory-floor wireless nodes. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24V industrial bus to stable 12V supply; operates continuously with thermal self-protection. Use Value: Delivers 94% efficiency at 24VIN/12VOUT, minimizing heat buildup in sealed enclosures without heatsinks. | Use Scenario: Generating 12V supply for door lock actuators, LED interior lighting, and CAN transceiver bias in 12V vehicle systems. IC Role / Device Role / Timing Role: Non-isolated buck converter handling cold-crank (6.5V) to load-dump (40V) transients per ISO 7637-2. Use Value: Wide 8–40V input range and thermal shutdown ensure reliable operation during battery voltage fluctuations and under-hood thermal stress. |
| Programmable Logic Controller I/O Module | Test Equipment Auxiliary Supply |
Use Scenario: Providing regulated 12V for isolated digital I/O drivers and analog input signal conditioning in modular PLC backplanes. IC Role / Device Role / Timing Role: Fixed-output DC-DC stage upstream of LDOs or isolated DC-DC converters; enables clean, low-noise local power domains. Use Value: ±1.5% output tolerance and excellent line/load regulation maintain accuracy of analog measurements and digital logic thresholds. | Use Scenario: On-board 12V rail generation for FPGA configuration, ADC reference buffers, and relay drivers in benchtop test instruments. IC Role / Device Role / Timing Role: Compact, low-noise buck regulator replacing linear regulators to reduce thermal load in space-constrained chassis. Use Value: 260kHz switching allows small 47µH inductors and 47µF tantalum output capacitors, saving board area versus 50/60Hz transformer-based solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2574H-12 | Higher 60V max input, 52kHz switching frequency, 3A current limit; larger inductor required. | Better suited for high-input-voltage industrial systems with less stringent EMI requirements. | Select LM2574H-12 when input exceeds 40V or when lower switching frequency eases EMI filtering. |
| LMR12010XSD | Synchronous buck, 20V max input, 1.2A output, 1.6MHz switching; integrated high/low-side MOSFETs. | Offers higher efficiency at light loads and smaller passive components but narrower input range. | Choose LMR12010XSD for compact, high-efficiency designs where input stays below 20V and PCB area is critical. |
Compared with LM2674M-12, LM2574H-12 trades higher input voltage capability for lower switching frequency and larger magnetics, while LMR12010XSD delivers superior light-load efficiency and integration at the cost of reduced input range and higher cost per watt.
Availability
LM2674M-12 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, PLC I/O modules, and test equipment auxiliary supplies requiring stable component supply and long-term manufacturability.
Supply support for LM2674M-12 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 buck regulators for cost-sensitive industrial and automotive applications requiring minimal external components.
FAQ
What is the maximum input voltage rating for the LM2674M-12?
The LM2674M-12 has an absolute maximum input voltage rating of 45V, with recommended operating range from 8V to 40V. Operation above 40V risks exceeding safe junction temperature or triggering internal protection circuits, so designs must ensure transient spikes (e.g., load dump) remain within this window. The LM2674M-12 data sheet specifies 40V as the upper limit for continuous operation.
Does the LM2674M-12 require an external feedback resistor network?
No, the LM2674M-12 is a fixed 12V output variant and does not require external feedback resistors. Its FB pin is internally connected to the output for regulation, eliminating the need for a voltage divider. This simplifies layout and improves accuracy by removing resistor tolerance and temperature drift effects. The LM2674M-12 achieves ±1.5% output tolerance without external components.
What thermal considerations apply to the LM2674M-12 in SOIC-8 package?
The LM2674M-12 in SOIC-8 (D package) has a junction-to-ambient thermal resistance (RθJA) of 105°C/W with ~1 in² copper pad. At 500mA output and 24VIN, power dissipation is ~1.2W, resulting in ~126°C junction rise above ambient-requiring derating or airflow. The LM2674M-12 includes thermal shutdown at 150°C to prevent damage, but optimal layout with thermal vias and ground plane is essential for continuous operation.
Can the LM2674M-12 be used in synchronous rectification configurations?
No, the LM2674M-12 is a non-synchronous buck regulator and requires an external Schottky catch diode. It lacks a second integrated MOSFET or gate driver for synchronous rectification. Attempting to replace the diode with a MOSFET without complementary control will cause shoot-through or failure. For synchronous operation, consider TI's LMR series such as LMR12010XSD-not the LM2674M-12.
How does the ON/OFF pin function on the LM2674M-12?
The ON/OFF pin on the LM2674M-12 is a TTL-compatible enable input: logic high (>1.4V) enables regulation, logic low (<0.8V) places the IC in standby with 50μA quiescent current. It is internally pulled up to 7V, so leaving it floating defaults to enabled operation. This pin provides system-level power sequencing and low-power sleep control-critical for battery-powered applications using the LM2674M-12.
LM2674M-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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):
- 12V
- 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-12 FAQ
1.How can I place an order for LM2674M-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2674M-12 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-12 reliable?
The price and inventory of LM2674M-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2674M-12 is usually 5 days.
3.What payment methods are accepted for LM2674M-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2674M-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2674M-12?
LM2674M-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2674M-12 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-12?
For technical support, including LM2674M-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2674M-12 requirements.
6.How does Aetrix verify that LM2674M-12 is sourced from the original manufacturer or authorized distributors?
All LM2674M-12 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-12 meets industry standards.
7.What is the process for return or replacement of LM2674M-12?
All LM2674M-12 units undergo pre-shipment inspection (PSI). If there is an issue with LM2674M-12, 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-12 part is unused and in its original packaging.
Return procedure for LM2674M-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2674M-12 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
