My Inquiry
My Account
Texas Instruments LM2674M-12/NOPB
- Part No.:
- LM2674M-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2674M-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:515
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2674M-12/NOPB 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 power switch and operates in buck topology for efficient voltage reduction in industrial power rails.
For engineers reviewing the LM2674M-12/NOPB datasheet, LM2674M-12/NOPB pinout, LM2674M-12/NOPB application, or LM2674M-12/NOPB 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/NOPB implements a voltage-mode controlled buck regulator 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 the fixed-12V version, FB is shorted to VOUT, eliminating external resistors.
It features cycle-by-cycle current limiting (0.62–1.2A typical), thermal shutdown, and low-power standby mode (50μA) activated via ON/OFF pin. The high-side DMOS switch enables operation up to 40V input while maintaining stable regulation across –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±1.5% over line/load/temperature - eliminates need for feedback divider and simplifies BOM. |
| Max Output Current | 500mA DC - sufficient for powering logic rails, analog circuitry, or intermediate-stage supplies without external current boosting. |
| Input Voltage Range | 8V to 40V - supports wide-input industrial, automotive, and telecom power buses including unregulated 24V systems. |
| Switching Frequency | 260kHz fixed - enables use of compact, off-the-shelf inductors (e.g., 68µH) and reduces EMI compared to lower-frequency alternatives. |
| RDS(ON) | 0.25Ω typical at 25°C - minimizes conduction loss and supports >94% efficiency at 24VIN/12VOUT/500mA. |
| Quiescent Current | 3.6mA typical active, 50μA standby - enables low-power operation during system sleep modes without external bias circuits. |
| Protection Features | Thermal shutdown, cycle-by-cycle current limit, and under-voltage lockout - ensures robust fault recovery without external supervision. |
Pinout & Package
LM2674M-12/NOPB is packaged 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 |
|---|---|---|
| CB (Pin 1) | Bootstrap capacitor connection | Connects 10nF ceramic capacitor to VSW; enables gate drive for integrated high-side DMOS switch. |
| FB (Pin 4) | Feedback sense input | Internally tied to output for fixed-12V version - no external resistor network required. |
| ON/OFF (Pin 5) | Enable control input | TTL-compatible; ≥1.4V enables regulation, ≤0.8V disables with 50μA standby current. |
| VSW (Pin 8) | Switch node output | Drives external inductor and catch diode cathode; carries high dv/dt switching waveform - requires tight layout. |
| GND (Pin 6) | Power ground | Primary return path for input/output capacitors and IC substrate - must connect to low-impedance system ground plane. |
| VIN (Pin 7) | Main power input | Accepts 8–40V supply; connects to high-frequency bypass capacitor (CIN) with minimal trace length to GND. |
| NC (Pins 2,3) | No-connect | Not bonded internally - leave unconnected; no routing or thermal considerations required. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12V output | Eliminates feedback resistor network, reducing component count and layout sensitivity while guaranteeing ±1.5% accuracy across temperature and load. |
| Integrated 0.25Ω DMOS switch | Reduces external FET and driver requirements, enabling single-chip buck conversion with minimal external parts (only inductor, diode, two caps). |
| 260kHz fixed-frequency operation | Enables predictable EMI filtering and consistent inductor sizing - avoids subharmonic oscillation issues common in variable-frequency controllers. |
| TTL-compatible ON/OFF control | Supports direct interfacing with microcontroller GPIOs or logic-level signals without level-shifting, enabling precise power sequencing. |
| Thermal shutdown + current limit | Provides autonomous fault protection during overload, short-circuit, or inadequate heatsinking - prevents device destruction without external monitoring. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converting 24V vehicle battery rail to stable 12V for microcontrollers, sensors, and CAN transceivers. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing regulated 12V with high efficiency (>94%) and thermal resilience. Use Value: Delivers full 500mA at 24VIN/12VOUT without heatsink, leveraging copper traces as sole thermal path per TI characterization. |
Use Scenario: Generating 12V from 13.5–16V alternator output for infotainment subsystems with transient ride-through capability. IC Role / Device Role / Timing Role: Input-stage preregulator preceding LDOs or point-of-load converters, handling wide input variation and load steps. Use Value: Maintains regulation down to 8V input, supporting cold-crank conditions; 260kHz switching enables compact filter design for space-constrained modules. |
| Programmable Logic Controller (PLC) I/O Module | Test & Measurement Equipment |
|
Use Scenario: Providing isolated 12V auxiliary supply for digital I/O drivers and optocoupler interfaces in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: High-reliability DC-DC stage delivering clean, protected 12V rail with built-in current limiting and thermal foldback. Use Value: Withstands 40V transients per IEC 61000-4-5; ±1.5% output tolerance ensures accurate sensor excitation and ADC reference stability. |
Use Scenario: Powering analog front-end circuitry (op-amps, ADCs, DACs) requiring low-noise, tightly regulated 12V in portable bench instruments. IC Role / Device Role / Timing Role: Efficient intermediate-stage converter feeding low-noise LDOs, minimizing heat generation in sealed enclosures. Use Value: 3.6mA quiescent current and 50μA shutdown mode extend battery life; fixed output eliminates drift from resistor aging or temperature gradients. |
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, 500mA rating, same SOIC-8 footprint but larger thermal resistance (RθJA = 120°C/W vs. 105°C/W). | Preferred for higher-input or lower-EMI designs where slower switching is acceptable; less efficient at light loads due to lower frequency. | Select when input exceeds 40V or when legacy design reuse favors 52kHz magnetics. |
| LMR12010XSD | 12V fixed-output synchronous buck, 1A rating, 2.1MHz switching, WSON-6 package, no external diode required. | Better suited for space-constrained, high-efficiency applications needing >500mA or reduced BOM count; lacks thermal shutdown flag output. | Choose for next-gen designs prioritizing size, efficiency, and integration - but verify PCB rework compatibility with SOIC-8 footprint. |
Compared with LM2674M-12/NOPB, LM2574H-12 trades higher input voltage and lower EMI for reduced efficiency and thermal performance, while LMR12010XSD offers double current and synchronous rectification in a smaller package but requires layout redesign and lacks thermal fault indication.
Availability
LM2674M-12/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and programmable logic controller (PLC) modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2674M-12/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 DC-DC conversion.
The LM2674 series was designed as part of TI's SIMPLE SWITCHER® portfolio to simplify non-synchronous buck regulator implementation for cost-sensitive, medium-power industrial and automotive applications - emphasizing ease of use, minimal external components, and robust protection.
FAQ
What is the maximum input voltage rating for LM2674M-12/NOPB?
The absolute maximum input voltage for LM2674M-12/NOPB is 45V, but the recommended operating range is 8V to 40V. Operation above 40V risks exceeding safe operating area limits and may trigger internal protection or reduce reliability. TI specifies 40V as the upper limit for continuous operation with full parameter guarantees across temperature.
Does LM2674M-12/NOPB require an external feedback resistor network?
No - LM2674M-12/NOPB is the fixed 12V output variant, so the FB pin is internally connected to the output stage. External resistors are unnecessary, and FB should be directly tied to the output capacitor. This configuration eliminates resistor tolerance errors and improves long-term stability versus adjustable versions.
What is the thermal performance of LM2674M-12/NOPB in SOIC-8 package?
In the SOIC-8 (D) package, LM2674M-12/NOPB has a junction-to-ambient thermal resistance (RθJA) of 105°C/W with ~1 in² of copper on the PCB. At 500mA output and 24V input, power dissipation is ~6W, resulting in ~630°C rise - but actual measured rise is <40°C due to copper traces acting as heatsink, per TI application data.
Can LM2674M-12/NOPB be used with ceramic output capacitors?
Yes - LM2674M-12/NOPB is compatible with ceramic output capacitors, provided ESR is ≥5mΩ to ensure loop stability. TI recommends 47µF–100µF X7R/X5R ceramics rated ≥16V. Avoid ultra-low-ESR types (<2mΩ) without adding intentional series resistance, as they may cause ringing or instability.
What protection features are integrated into LM2674M-12/NOPB?
LM2674M-12/NOPB includes cycle-by-cycle current limiting (0.62–1.2A), thermal shutdown (150°C junction), under-voltage lockout, and internal soft-start. It does not include overvoltage protection or output short-circuit latch-off - fault conditions recover automatically after removal of overload or cooling below thermal threshold.
LM2674M-12/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):
- 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/NOPB FAQ
1.How can I place an order for LM2674M-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2674M-12/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-12/NOPB reliable?
The price and inventory of LM2674M-12/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-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2674M-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2674M-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2674M-12/NOPB?
LM2674M-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2674M-12/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-12/NOPB?
For technical support, including LM2674M-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2674M-12/NOPB requirements.
6.How does Aetrix verify that LM2674M-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2674M-12/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-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2674M-12/NOPB?
All LM2674M-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2674M-12/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-12/NOPB part is unused and in its original packaging.
Return procedure for LM2674M-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2674M-12/NOPB 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…
