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Texas Instruments LM2675M-12/NOPB
- Part No.:
- LM2675M-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2675M-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,387
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Product details
Overview
LM2675M-12/NOPB from Texas Instruments is a monolithic step-down (buck) DC-DC switching regulator delivering 1A output current with fixed 12V output, 260kHz fixed-frequency operation, ±1.5% output voltage tolerance over line and load, and 94% efficiency at 24V input/1A load - used in industrial power supplies and embedded system preregulation.
For engineers reviewing the LM2675M-12/NOPB datasheet, LM2675M-12/NOPB pinout, LM2675M-12/NOPB application, or LM2675M-12/NOPB equivalent, key selection criteria include its 8V–40V input range, thermal shutdown protection, TTL-compatible enable control, and SOIC-8 package compatibility with standard PCB layouts.
Technical Context
The LM2675M-12/NOPB integrates a DMOS high-side power switch, internal frequency compensation, and a 260kHz oscillator to implement a complete synchronous-buck topology without external timing components. 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 operates in continuous conduction mode up to 1A load, features cycle-by-cycle current limiting (1.25–2.1A typical), and enters low-power shutdown (<100μA standby) when ON/OFF pin voltage drops below 1.4V. Thermal shutdown activates at 150°C junction temperature, and frequency foldback engages under extreme overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±1.5% over –40°C to 125°C and full load range - ensures stable rail for downstream logic or analog circuitry without trimming. |
| Input Voltage Range | 8V to 40V - supports wide-input industrial, automotive battery-derived, or unregulated DC bus applications. |
| Max Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, or interface ICs without external pass devices. |
| Switching Frequency | 260kHz ±10% - enables use of compact 47–68μH inductors and reduces EMI compared to lower-frequency alternatives. |
| Efficiency | 94% at VIN = 24V, IOUT = 1A - minimizes thermal stress; copper PCB traces serve as sole heatsink per TI design guidance. |
| Quiescent Current | 3.6mA typical active, 50–100μA standby - suitable for always-on systems requiring low idle power. |
| Protection Features | Thermal shutdown, cycle-by-cycle current limit, and frequency foldback - prevent damage during overload, short-circuit, or elevated ambient conditions. |
Pinout & Package
LM2675M-12/NOPB is packaged in an 8-pin SOIC (D package), 4.9mm × 6mm body size, with exposed pad grounded for thermal performance. Pin functions are validated per TI SNVS129G Rev G.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CB) | Bootstrap capacitor connection | Connects 470nF ceramic capacitor between CB and VSW to drive high-side MOSFET gate - critical for proper switch turn-on. |
| 2,3 (NC) | No-connect | Unbonded pins; must remain floating - no routing or soldering required. |
| 4 (FB) | Feedback sense input | Internally tied to output for fixed-12V version - no external divider needed; shorting to ground disables regulation. |
| 5 (ON/OFF) | Enable control input | TTL-compatible; ≥1.4V enables regulator, <0.8V disables with ~50μA standby current - enables system-level power sequencing. |
| 6 (GND) | Power ground | Main return path for input/output capacitors and inductor - requires low-inductance, short PCB trace to minimize noise and thermal resistance. |
| 7 (VIN) | Input supply | Accepts 8–40V DC; connects to high-frequency bypass capacitor (e.g., 22μF tantalum) - trace must be short to reduce switching noise injection. |
| 8 (VSW) | Switch node output | Drives external inductor and catch diode cathode - high dv/dt node requiring careful layout to avoid EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12V output with no external resistors | Eliminates feedback divider design effort and component count - simplifies BOM and improves long-term output stability. |
| Integrated DMOS high-side switch | Reduces external component count to only 5: input cap, output cap, inductor, catch diode, and bootstrap cap - accelerates prototyping. |
| Patented internal frequency compensation | Enables stable operation across all loads and input voltages without external compensation network - removes tuning complexity. |
| TTL-compatible ON/OFF control | Allows direct interfacing with microcontroller GPIO or logic-level signals - supports dynamic power management without level-shifting. |
| Thermal shutdown + current limit protection | Provides autonomous fault recovery without external monitoring circuitry - enhances reliability in unattended industrial deployments. |
Applications
| Industrial Power Supply | Embedded System Preregulator |
|---|---|
Use Scenario: Converting 24V DC factory bus to stable 12V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 12V rail with ripple <50mVpp. Use Value: Delivers 1A at 94% efficiency - reduces heat sink requirements and enables compact DIN-rail mount designs. | Use Scenario: Generating clean 12V intermediate rail for LDOs feeding FPGA core and I/O banks. IC Role / Device Role / Timing Role: High-efficiency preregulator preceding linear regulators to minimize thermal dissipation. Use Value: Maintains ±1.5% output accuracy across –40°C to 85°C ambient - ensures downstream LDOs operate within dropout margin. |
| Positive-to-Negative Converter | Automotive Body Control Module |
Use Scenario: Configured in inverting topology to generate –12V from 12V battery for op-amp biasing or RS-232 drivers. IC Role / Device Role / Timing Role: Switching controller operating in forced CCM with external inductor and diode - leverages fixed 260kHz frequency for predictable filter design. Use Value: Uses same external component set as buck mode - simplifies dual-rail design reuse and inventory consolidation. | Use Scenario: Powering infotainment display backlight drivers and CAN transceivers from vehicle 12V battery (9–16V nominal, up to 40V load dump). IC Role / Device Role / Timing Role: Input-tolerant buck converter handling wide transient input range while maintaining 12V output for safety-critical subsystems. Use Value: Withstands 40V transients and shuts down thermally at 150°C - meets AEC-Q200-relevant robustness for under-hood proximity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2675-12 | Same silicon, identical electrical specs, but offered in PDIP-8 (P) or WSON-16 (NHN) packages - no SOIC-8 variant with /NOPB suffix. | PDIP-8 requires through-hole assembly; WSON-16 needs thermal vias and tighter layout - SOIC-8 remains optimal for reflow-soldered boards. | Select LM2675M-12/NOPB for surface-mount production with standard SOIC footprint and RoHS compliance. |
| TPS54202DR | 2A synchronous buck, 4.5–28V input, adjustable output, 500kHz switching - higher current, wider input, but requires external feedback resistors and lacks fixed-12V option. | Better suited for space-constrained, higher-current apps; not drop-in due to different pinout, enable threshold (1.23V), and no fixed-12V SKU. | Choose TPS54202DR only when >1A output or synchronous rectification (no external diode) is required - not a functional replacement. |
Compared with LM2675-12 and TPS54202DR, the LM2675M-12/NOPB uniquely combines fixed-12V output, SOIC-8 packaging, and 8–40V input in a single RoHS-compliant, production-qualified part - making it optimal for cost-sensitive, medium-power industrial buck designs where simplicity and layout compatibility are prioritized.
Availability
LM2675M-12/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, embedded system preregulation, and automotive body control modules requiring stable component supply, long-lifecycle support, and consistent parametric performance across manufacturing lots.
Supply support for LM2675M-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 power conversion ICs.
The LM2675 series belongs to TI's SIMPLE SWITCHER® family - designed specifically for engineers needing fast, reliable, low-component-count DC-DC solutions for industrial, automotive, and communications infrastructure applications.
FAQ
What is the maximum input voltage rating for LM2675M-12/NOPB?
The absolute maximum input voltage for LM2675M-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 overvoltage protection or cause permanent damage. TI specifies 40V as the upper limit for continuous reliable operation across temperature and load conditions - always verify input transients (e.g., automotive load dump) stay within this bound.
Does LM2675M-12/NOPB require external feedback resistors?
No, LM2675M-12/NOPB does not require external feedback resistors because it is a fixed-output version - the feedback pin (FB) is internally connected to achieve 12V regulation. Unlike the adjustable LM2675 variants, this part eliminates the need for resistor dividers, reducing component count and improving output accuracy stability over temperature and time.
What package type is used for LM2675M-12/NOPB?
LM2675M-12/NOPB uses an 8-pin SOIC (Small Outline Integrated Circuit) package, designated as "D" by Texas Instruments, with dimensions of 4.9mm × 6mm. It is RoHS-compliant and lead-free (/NOPB suffix), optimized for surface-mount reflow assembly and compatible with standard PCB footprints for SOIC-8 devices.
How does the ON/OFF pin function on LM2675M-12/NOPB?
The ON/OFF pin on LM2675M-12/NOPB is a TTL-compatible enable input: applying ≥1.4V (typically 3.3V or 5V logic high) enables regulation, while ≤0.8V (or grounded) places the device in low-power shutdown with 50–100μA quiescent current. This pin supports precise system-level power sequencing and battery-saving modes without external logic translators.
What is the typical efficiency of LM2675M-12/NOPB at full load?
LM2675M-12/NOPB achieves 94% typical efficiency at VIN = 24V, VOUT = 12V, and IOUT = 1A - measured per TI's standard test circuit with recommended external components (68μH inductor, Schottky catch diode, and low-ESR capacitors). Efficiency drops to ~86% at VIN = 12V/1A and improves slightly at lighter loads due to reduced conduction losses.
LM2675M-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:
- 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
LM2675M-12/NOPB FAQ
1.How can I place an order for LM2675M-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2675M-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 LM2675M-12/NOPB reliable?
The price and inventory of LM2675M-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 LM2675M-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2675M-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2675M-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2675M-12/NOPB?
LM2675M-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2675M-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 LM2675M-12/NOPB?
For technical support, including LM2675M-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2675M-12/NOPB requirements.
6.How does Aetrix verify that LM2675M-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2675M-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 LM2675M-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2675M-12/NOPB?
All LM2675M-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2675M-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 LM2675M-12/NOPB part is unused and in its original packaging.
Return procedure for LM2675M-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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