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Texas Instruments LM2675N-5.0
- Part No.:
- LM2675N-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2675N-5.0.pdf
- Description:
- IC REG BUCK 5V 1A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,124
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Product details
Overview
LM2675N-5.0 from Texas Instruments is a monolithic step-down (buck) DC-DC switching regulator IC delivering 5 V at up to 1 A output current, with ±1.5% output voltage tolerance, 260 kHz fixed switching frequency, and 90% efficiency at 12 V input/1 A load. It integrates a DMOS power MOSFET switch and internal frequency compensation for compact, high-efficiency power conversion in industrial and embedded systems.
For engineers reviewing the LM2675N-5.0 datasheet, LM2675N-5.0 pinout, LM2675N-5.0 application, or LM2675N-5.0 equivalent, key selection considerations include its fixed 5 V output, 8-pin SOIC (D) package, 6.5–40 V input range, TTL-compatible ON/OFF control, and thermal/current protection - all critical for reliable low-noise 5 V rail generation in space-constrained designs.
Technical Context
The LM2675N-5.0 implements a synchronous-free buck topology using an integrated high-side DMOS FET switch and internal 260 kHz oscillator. Its feedback loop regulates output by comparing FB pin voltage to a precise 1.21 V internal reference, enabling stable 5 V regulation without external resistor dividers.
It operates in continuous conduction mode up to 1 A load, features cycle-by-cycle current limiting (1.25–2.1 A), thermal shutdown, and a dedicated boot-strap capacitor (CB) pin for high-side gate drive. Standby current drops to 50 μA in shutdown, activated via TTL-level ON/OFF pin (1.4 V threshold).
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 trimming. |
| Max Output Current | 1 A continuous - supports microcontrollers, sensors, and interface ICs without external current boosting. |
| Input Voltage Range | 6.5 V to 40 V - accommodates wide-input industrial rails (e.g., 12 V, 24 V bus) with margin for transients. |
| Switching Frequency | 260 kHz (±10%) - enables use of small, low-cost 47–68 µH inductors and reduces EMI compared to lower-frequency alternatives. |
| Efficiency | 90% at VIN = 12 V, IOUT = 1 A - minimizes thermal load; PCB copper traces suffice as heat sink. |
| Quiescent Current | 3.6 mA typical active, 50 µA standby - extends battery life in always-on or low-power wake-up systems. |
| Protection Features | Thermal shutdown, cycle-by-cycle current limit, and under-voltage lockout - prevent damage during overload or fault conditions. |
Pinout & Package
LM2675N-5.0 is packaged in an 8-pin SOIC (D package), 4.9 mm × 6 mm body size, with exposed pad not present (non-WSON variant). Pin functions are validated per TI SNVS129G Rev. JUNE 2025.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CB | Bootstrap capacitor connection | Connects 470 nF ceramic capacitor between CB and VSW to bias high-side gate driver - essential for proper switch turn-on. |
| 2 NC | No connect | Internally unconnected; must remain floating - no routing or grounding allowed. |
| 3 NC | No connect | Internally unconnected; must remain floating - no routing or grounding allowed. |
| 4 FB | Feedback sense input | Internally tied to 5 V output; no external divider needed - simplifies layout and eliminates resistor tolerance errors. |
| 5 ON/OFF | Enable control input | TTL-compatible; ≥1.4 V enables regulator, ≤0.8 V disables it - allows microcontroller or logic-level sequencing. |
| 6 GND | Power ground | Main return path for input/output capacitors and inductor - requires short, low-impedance PCB trace to minimize noise and voltage drop. |
| 7 VIN | Input supply | Accepts 6.5–40 V DC; connects to high-frequency bypass capacitor (22 µF tantalum) - input path must be shortest possible to GND. |
| 8 VSW | Switch node output | Drives external Schottky diode and inductor - high dv/dt node requiring tight layout and minimal parasitic inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS power switch | Eliminates need for external high-side MOSFET - reduces BOM count and layout complexity for 1 A buck converters. |
| Patented internal frequency compensation | Enables stable operation with only 5 external components (inductor, diode, input/output caps, bootstrap cap) - no loop compensation design required. |
| Fixed-frequency 260 kHz oscillator | Provides predictable EMI profile and simplifies filter design - avoids subharmonic oscillation issues common in variable-frequency controllers. |
| TTL-compatible ON/OFF control | Supports direct interfacing with 3.3 V/5 V logic without level-shifting - enables system-level power sequencing and low-power sleep modes. |
| Thermal and current-limit protection | Self-protects against sustained overload or ambient overheating - prevents field failure without external circuitry. |
Applications
| Industrial PLC I/O Module Power | Embedded Microcontroller Core Supply |
|---|---|
|
Use Scenario: Providing clean, regulated 5 V power to digital I/O banks in programmable logic controllers operating from 24 V DC industrial bus. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24 V to isolated 5 V rail for optocoupler drivers and logic-level translation circuits. Use Value: 90% efficiency minimizes heat buildup in sealed enclosures; ±1.5% tolerance ensures reliable logic-level compatibility across temperature. |
Use Scenario: Generating main 5 V supply for ARM Cortex-M or PIC microcontrollers in battery-backed data loggers. IC Role / Device Role / Timing Role: System power regulator enabling low-quiescent operation (50 µA standby) and fast wake-up from deep-sleep states. Use Value: TTL ON/OFF pin allows MCU to disable regulator during sleep, reducing system idle current to microamp levels. |
| Medical Sensor Signal Chain Bias | Automotive Aftermarket Telematics Unit |
|
Use Scenario: Delivering low-noise 5 V to precision ADCs, op-amps, and analog front-ends in portable patient monitors. IC Role / Device Role / Timing Role: Fixed-output buck converter supplying analog subsystem - benefits from internal compensation for stable transient response. Use Value: 260 kHz switching frequency places ripple energy above sensitive audio-band frequencies, easing analog filtering requirements. |
Use Scenario: Powering GPS/GSM modules and microSD interfaces in vehicle-mounted fleet tracking devices powered from 12 V automotive battery. IC Role / Device Role / Timing Role: Primary DC-DC stage handling cold-crank (6.5 V) to load-dump (40 V) transients while maintaining 5 V output. Use Value: 6.5–40 V input range and thermal shutdown ensure robust operation across harsh automotive voltage extremes. |
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 | Higher 52 kHz switching frequency, larger external components required, 3 A max output, TO-220/TO-263 packages only. | Better suited for higher-current, lower-EMI-sensitive applications where board space is less constrained. | Select when >1 A load or through-hole assembly is required; avoid for compact SMT designs needing 260 kHz optimization. |
| TPS54202DR | 2 A output, 4.5–28 V input, 500 kHz switching, integrated soft-start, smaller 8-pin SOIC with thermal pad. | Offers higher current and tighter regulation (±1%), but requires external compensation and has stricter layout demands. | Choose for next-gen designs needing headroom beyond 1 A or improved light-load efficiency - not a drop-in replacement. |
Compared with LM2675N-5.0, LM2575H-5.0 trades higher current and rugged packaging for larger magnetics and lower switching frequency, while TPS54202DR delivers greater performance density at the cost of increased design complexity and non-pin-compatibility.
Availability
LM2675N-5.0 is available at Aetrix Electronics and suitable for industrial PLCs, embedded microcontroller systems, medical sensor modules, and automotive telematics requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2675N-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 ease-of-use, minimal external component count, and robust operation in industrial, automotive, and medical power applications without requiring advanced power design expertise.
FAQ
What is the maximum input voltage rating for the LM2675N-5.0?
The absolute maximum input voltage for LM2675N-5.0 is 45 V, but the recommended operating range is 6.5 V to 40 V. Operation above 40 V risks exceeding safe junction temperature or violating SOA limits, especially under high ambient conditions or full load. Always observe derating curves in the thermal section of the datasheet when operating near 40 V.
Does the LM2675N-5.0 require an external feedback resistor network?
No, the LM2675N-5.0 does not require external feedback resistors. As a fixed 5 V output variant, its FB pin is internally connected to the regulated output, eliminating the need for a voltage divider. This simplifies layout, improves accuracy, and removes resistor tolerance and temperature drift as error sources - a key advantage over adjustable versions like LM2675MX-ADJ.
Can the LM2675N-5.0 be used in discontinuous conduction mode (DCM)?
Yes, the LM2675N-5.0 naturally operates in DCM at light loads (typically <200 mA), as confirmed by Figure 5-16 in the datasheet. Its current-mode control architecture maintains stability across both CCM and DCM, with no external compensation changes required. DCM operation reduces light-load quiescent current and improves efficiency below ~10% load.
What type of external diode is recommended for the LM2675N-5.0?
A Schottky diode rated for ≥3.3 A average current and ≥50 V reverse voltage is recommended for LM2675N-5.0, such as the IR 30WQ05F. Schottky diodes minimize forward voltage drop and recovery losses, directly improving efficiency and thermal performance. Fast-recovery PN diodes are not recommended due to higher switching losses and potential thermal runaway.
Is the LM2675N-5.0 RoHS compliant and lead-free?
Yes, the LM2675N-5.0 is RoHS compliant and lead-free, meeting JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) requirements. The SOIC (D) package uses matte tin lead finish and complies with IPC/JEDEC J-STD-020D. Full compliance documentation, including material declarations and test reports, is available on Texas Instruments' product folder page for LM2675.
LM2675N-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LM2675N-5.0 FAQ
1.How can I place an order for LM2675N-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2675N-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 LM2675N-5.0 reliable?
The price and inventory of LM2675N-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 LM2675N-5.0 is usually 5 days.
3.What payment methods are accepted for LM2675N-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2675N-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2675N-5.0?
LM2675N-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2675N-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 LM2675N-5.0?
For technical support, including LM2675N-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2675N-5.0 requirements.
6.How does Aetrix verify that LM2675N-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2675N-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 LM2675N-5.0 meets industry standards.
7.What is the process for return or replacement of LM2675N-5.0?
All LM2675N-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2675N-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 LM2675N-5.0 part is unused and in its original packaging.
Return procedure for LM2675N-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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