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Texas Instruments LM2675M-5.0
- Part No.:
- LM2675M-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2675M-5.0.pdf
- Description:
- IC REG BUCK 5V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,584
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Product details
Overview
LM2675M-5.0 from Texas Instruments is a monolithic step-down (buck) DC-DC voltage regulator delivering 5.0 V at up to 1 A output current, operating from 8 V to 40 V input, with ±1.5% output voltage tolerance and 90% typical efficiency at 12 VIN/1 A. It integrates a DMOS power switch, fixed 260 kHz oscillator, internal compensation, and thermal/current protection-designed for compact, high-efficiency power conversion in industrial and embedded systems.
For engineers reviewing the LM2675M-5.0 datasheet, LM2675M-5.0 pinout, LM2675M-5.0 application, or LM2675M-5.0 equivalent, key selection considerations include its fixed 5 V output, SOIC-8 package compatibility, 260 kHz switching frequency for small filter components, TTL-compatible enable control, and requirement for only five external components including bootstrap capacitor, inductor, catch diode, and input/output capacitors.
Technical Context
The LM2675M-5.0 implements a synchronous-free buck topology using an integrated high-side DMOS FET with 0.3 Ω typical RDS(ON), driven by a fixed-frequency 260 kHz oscillator. Feedback is internally referenced to 1.21 V, but for the fixed-5.0-V variant, the FB pin is internally connected to set regulation without external resistors.
It operates in continuous conduction mode up to full 1 A load, features cycle-by-cycle current limiting (1.25–2.1 A), thermal shutdown, and TTL-compatible ON/OFF control with 50 μA standby current. The CB pin requires a 470 nF ceramic bootstrap capacitor to sustain gate drive for the high-side switch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over line/load/temperature - ensures stable logic supply without external feedback divider. |
| Max Output Current | 1 A continuous - supports single-rail microcontroller, FPGA I/O, or sensor subsystems without derating. |
| Input Voltage Range | 8 V to 40 V - accommodates 12 V/24 V industrial rails and automotive battery transients. |
| Switching Frequency | 260 kHz fixed - enables use of low-cost, low-ESR 33–68 μH inductors and reduces EMI compared to lower-frequency alternatives. |
| Efficiency | 90% typical at 12 VIN/1 A - minimizes thermal load; PCB copper traces suffice as heatsink under full load. |
| Quiescent Current | 3.6 mA active, 50 μA standby - supports low-power sleep modes in battery-backed or energy-conscious systems. |
| Protection Features | Thermal shutdown, cycle-by-cycle current limit, and undervoltage lockout - prevents damage during overload, short-circuit, or cold-start conditions. |
Pinout & Package
LM2675M-5.0 is supplied in an 8-pin SOIC (D package), 4.9 mm × 6.0 mm body size, with exposed pad not present. Pin functions are validated per TI SNVS129G Rev G (2025).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB (Pin 1) | Bootstrap capacitor node | Connects 470 nF ceramic capacitor to VSW; enables high-side gate drive without external charge pump. |
| NC (Pins 2, 3) | No-connect | Internally unconnected; must be left floating or tied to GND per layout best practice - no functional role. |
| FB (Pin 4) | Feedback reference input | Internally tied to 5.0 V regulation point; no external resistor divider required for fixed-output operation. |
| ON/OFF (Pin 5) | Enable control input | TTL-compatible; ≥1.4 V enables regulator, ≤0.8 V disables with 50 μA standby current. |
| VIN (Pin 7) | Main power input | Accepts 8–40 V; requires local 22 μF tantalum bypass capacitor with short, low-inductance path to GND. |
| VSW (Pin 8) | Switch node | Drives external inductor and Schottky catch diode cathode; high dv/dt node requiring tight layout and ground plane clearance. |
| GND (Pin 6) | Power ground | Primary return for VIN bypass, output capacitor, and internal switch; must connect directly to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS power switch | 0.3 Ω RDS(ON) at 25°C enables 1 A output with <1 W conduction loss at full load. |
| Fixed-frequency 260 kHz operation | Allows predictable EMI filtering and consistent inductor sizing across designs - no frequency jitter or spread-spectrum artifacts. |
| Internal frequency compensation | Eliminates need for external compensation network - reduces BOM count and design iteration time. |
| TTL shutdown with low-IQ | 50 μA standby current enables rapid wake-up from deep sleep while minimizing battery drain in portable applications. |
| Thermal + current fault protection | Auto-recovering thermal shutdown and cycle-by-cycle current limit prevent latch-up or permanent damage during transient overloads. |
Applications
| Industrial PLC I/O Power | Embedded Microcontroller Core Supply |
|---|---|
Use Scenario: Providing clean, regulated 5 V to digital I/O modules in programmable logic controllers operating from 24 V DC rails with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary buck converter supplying isolated 5 V logic rail; handles load steps up to 1 A while maintaining <±1.5% regulation. Use Value: Eliminates need for external feedback resistors or compensation components - simplifies certification for industrial EMC standards due to fixed-frequency behavior. | Use Scenario: Powering ARM Cortex-M or RISC-V microcontrollers and associated peripherals (SPI flash, sensors, UART transceivers) in edge-node IoT gateways. IC Role / Device Role / Timing Role: Main system regulator delivering 5 V at up to 1 A; enabled via MCU GPIO during active mode and disabled during deep-sleep cycles. Use Value: 50 μA standby current extends battery life in intermittently powered devices; 260 kHz switching avoids audible noise in acoustic-sensitive environments. |
| Medical Diagnostic Sensor Interface | Automotive Body Control Module (BCM) |
Use Scenario: Generating stable 5 V for precision analog front-ends (ADC drivers, op-amps) in portable ultrasound or ECG signal conditioning circuits. IC Role / Device Role / Timing Role: Low-noise post-regulator following a higher-voltage intermediate rail; supplies noise-sensitive analog circuitry with minimal ripple. Use Value: Fixed 5 V output eliminates resistor tolerance errors; ±1.5% tolerance ensures ADC reference stability across –40°C to +125°C operating range. | Use Scenario: Converting 12 V vehicle battery voltage to robust 5 V for microcontroller, CAN transceiver, and LED driver logic in interior lighting or door module ECUs. IC Role / Device Role / Timing Role: Primary DC-DC stage handling cold-crank (6.5 V) to load-dump (40 V) transients per ISO 7637-2. Use Value: 8–40 V input range and thermal protection ensure reliable operation during automotive voltage extremes without external supervision circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575H-5.0 | 52 kHz switching frequency, 3 A output, larger external components required; no bootstrap capacitor needed. | Better suited for high-current, low-EMI applications where board space is less constrained. | Select when lower switching frequency eases EMI filtering or higher current headroom is needed - not pin-compatible. |
| TPS54202DR | 2.5–17 V input, 2 A output, 500 kHz to 2.2 MHz adjustable frequency, integrated high-/low-side FETs. | Requires external feedback resistors and compensation; supports smaller magnetics but adds design complexity. | Choose for wider input range, higher efficiency above 15 VIN, or programmable frequency - different pinout and footprint. |
Compared with LM2575H-5.0 and TPS54202DR, the LM2675M-5.0 offers optimal balance of simplicity (5-component design), fixed 5 V accuracy, and 260 kHz frequency for mid-power industrial applications - trading peak current and input flexibility for ease of qualification and layout robustness.
Availability
LM2675M-5.0 is available at Aetrix Electronics and suitable for industrial PLCs, embedded microcontroller systems, medical sensor interfaces, and automotive body electronics requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2675M-5.0 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, minimal-component DC-DC solutions for industrial, automotive, and medical applications without complex compensation or layout tuning.
FAQ
What is the maximum input voltage rating for the LM2675M-5.0?
The absolute maximum input voltage for the LM2675M-5.0 is 45 V, but the recommended operating range is 8 V to 40 V per TI SNVS129G. Operation at 40 V is supported across the full temperature range (–40°C to +125°C), making it suitable for automotive load-dump and industrial 24 V rail applications. Exceeding 40 V may trigger internal protection or reduce reliability.
Does the LM2675M-5.0 require an external feedback resistor network?
No, the LM2675M-5.0 does not require external feedback resistors. As a fixed 5.0 V output variant, the feedback reference is internally configured - the FB pin is pre-connected to achieve 5.0 V regulation. External resistors are only needed for the adjustable version (LM2675MX-ADJ); adding them to LM2675M-5.0 would disrupt regulation.
What type of diode is recommended for use with the LM2675M-5.0?
A Schottky diode rated for ≥3.3 A average current and ≥50 V reverse voltage is recommended for the LM2675M-5.0, such as the IR 30WQ05F or equivalent. Schottky technology minimizes forward voltage drop and recovery losses, preserving efficiency - especially critical at 260 kHz switching where reverse recovery losses dominate in standard PN diodes.
Can the LM2675M-5.0 be used in discontinuous conduction mode (DCM)?
Yes, the LM2675M-5.0 naturally operates in DCM at light loads (<300 mA typical with 47–68 μH inductor), as confirmed in TI's Figure 5-16. Its current-mode control architecture maintains stability across CCM and DCM transitions without external compensation changes - enabling efficient light-load performance without burst-mode artifacts or audible noise.
Is thermal derating required for the LM2675M-5.0 in SOIC-8 package at 1 A load?
At 1 A load with 12 VIN→5 VOUT, the LM2675M-5.0 dissipates ~0.7 W. With SOIC-8 RθJA = 105°C/W and 25°C ambient, junction temperature rises ~74°C - well below the 125°C max operating limit. No forced airflow or heatsink is needed if ≥1 in² of 2-oz copper is connected to GND pins; thermal shutdown activates only under sustained overload or poor layout.
LM2675M-5.0 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):
- 5V
- 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-5.0 FAQ
1.How can I place an order for LM2675M-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2675M-5.0 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-5.0 reliable?
The price and inventory of LM2675M-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2675M-5.0 is usually 5 days.
3.What payment methods are accepted for LM2675M-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2675M-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2675M-5.0?
LM2675M-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2675M-5.0 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-5.0?
For technical support, including LM2675M-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2675M-5.0 requirements.
6.How does Aetrix verify that LM2675M-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2675M-5.0 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-5.0 meets industry standards.
7.What is the process for return or replacement of LM2675M-5.0?
All LM2675M-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2675M-5.0, 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-5.0 part is unused and in its original packaging.
Return procedure for LM2675M-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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