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Texas Instruments LM2675N-5.0/NOPB
- Part No.:
- LM2675N-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2675N-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,275
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Product details
Overview
LM2675N-5.0/NOPB from Texas Instruments is a monolithic step-down (buck) DC-DC switching regulator IC delivering 5 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 MOSFET switch, fixed 260 kHz oscillator, internal frequency compensation, and thermal/current protection-designed for compact, high-efficiency power conversion in industrial and embedded systems.
For engineers reviewing the LM2675N-5.0/NOPB datasheet, LM2675N-5.0/NOPB pinout, LM2675N-5.0/NOPB application, or LM2675N-5.0/NOPB equivalent, key selection criteria include its fixed 5 V output, SOIC-8 package compatibility, 260 kHz switching frequency enabling small external filter components, and TTL-compatible ON/OFF control with 50 μA standby current.
Technical Context
The LM2675N-5.0/NOPB implements a synchronous-free buck topology using an integrated high-side DMOS FET switch and external catch diode. Its internal 260 kHz oscillator drives pulse-width modulation with cycle-by-cycle current limiting and thermal shutdown-no external timing components required. The feedback loop regulates output by comparing FB pin voltage to a precise 1.21 V internal reference, with the FB pin internally connected to the 5 V output for fixed versions.
It operates in continuous conduction mode (CCM) under full load and transitions to discontinuous conduction mode (DCM) at light loads. Shutdown is asserted when ON/OFF pin voltage drops below 1.4 V, reducing quiescent current to 50 μA typical-enabling low-power standby operation without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over line, load, and temperature - ensures stable logic supply without external resistor divider. |
| Max Output Current | 1 A continuous - supports microcontroller cores, FPGA I/O banks, and sensor interfaces without derating at 25°C. |
| 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 standard 22–68 μH shielded inductors and reduces EMI compared to lower-frequency alternatives. |
| Efficiency | 90% typical at 12 VIN/1 A - minimizes thermal rise on PCB; copper traces serve as sole heatsink per TI design guidance. |
| Quiescent Current | 3.6 mA active, 50 μA standby - supports always-on subsystems with low sleep-mode power budgets. |
| Protection Features | Thermal shutdown, cycle-by-cycle current limit (1.25–2.1 A), and undervoltage lockout - eliminates need for external fault management circuitry. |
Pinout & Package
LM2675N-5.0/NOPB is supplied in an 8-pin SOIC (D) package (4.9 mm × 6 mm), with exposed pad not present-thermal performance relies on PCB copper area per RθJA = 105°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CB) | Bootstrap capacitor connection | Connects 470 nF 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; no routing or grounding required. |
| 4 (FB) | Feedback sense input | Internally tied to 5 V output; unused in fixed version-leave unconnected or tie directly to VOUT per datasheet. |
| 5 (ON/OFF) | Enable control input | TTL-compatible: ≥1.4 V = active regulation; ≤0.8 V = shutdown with 50 μA IQ; open-circuit defaults to ON. |
| 6 (GND) | Power ground | Main return path for input capacitor (CIN) and output capacitor (COUT); shortest possible trace to minimize noise and EMI. |
| 7 (VIN) | Input supply | Accepts 8–40 V DC; requires local 22 μF tantalum or low-ESR ceramic CIN placed adjacent to pin. |
| 8 (VSW) | Switch node output | Drives external Schottky diode anode and inductor; high dv/dt node-requires tight layout and minimal loop area. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS power switch | 0.3 Ω typical RDS(on) at 25°C - reduces conduction loss and eliminates external high-side MOSFET. |
| Patented internal frequency compensation | Eliminates need for external compensation network - simplifies design and improves stability across all operating conditions. |
| Fixed 5 V output configuration | FB pin pre-connected internally - removes feedback resistor divider, saving board space and BOM cost. |
| TTL-compatible enable input | ON/OFF pin accepts 0–5 V logic levels - allows direct interfacing with MCU GPIOs without level-shifting. |
| Thermal and current protection | Auto-recovery thermal shutdown + cycle-by-cycle current limit - prevents damage during overload or ambient overtemperature. |
Applications
| Industrial PLC Power Supply | Embedded Microcontroller Core Rail |
|---|---|
Use Scenario: Providing regulated 5 V to programmable logic controller (PLC) I/O modules powered from 24 V DC field bus. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24 V field supply to isolated 5 V logic rail. Use Value: 90% efficiency minimizes heat buildup in sealed enclosures; 40 V max input withstands load-dump transients. |
Use Scenario: Generating clean 5 V for ARM Cortex-M4 microcontroller core and peripherals in battery-backed instrumentation. IC Role / Device Role / Timing Role: Main system power converter enabling low-noise analog and digital subsystems. Use Value: ±1.5% output tolerance ensures reliable ADC reference and USB PHY operation; 50 μA standby supports long-term data logging. |
| Automotive Body Control Module | Point-of-Load Converter for Sensors |
Use Scenario: Powering CAN transceivers and door-lock actuators from vehicle 12 V battery with cold-crank support. IC Role / Device Role / Timing Role: Pre-regulator stepping 12 V down to 5 V before linear LDOs for noise-sensitive circuits. Use Value: 8 V minimum input sustains regulation during 6 V cold-crank events; integrated current limit protects against motor stall faults. |
Use Scenario: Local 5 V supply for precision temperature and pressure sensors in HVAC control units. IC Role / Device Role / Timing Role: Dedicated point-of-load regulator minimizing IR drop and noise coupling from shared rails. Use Value: Fixed 5 V output eliminates resistor tolerance error; 260 kHz switching allows compact 33 μH inductor and low-profile capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575HVS-5.0 | 5.0 V fixed, 1 A, 52 kHz switching frequency, higher RDS(on) (0.45 Ω), wider input (4–60 V). | Lower switching frequency requires larger inductors/capacitors; better suited for cost-sensitive, low-EMI designs where size is secondary. | Select when input exceeds 40 V or when legacy 52 kHz EMI profile is preferred over 260 kHz. |
| TPS54202DDCR | 5.0 V adjustable via resistor divider, 2 A, 480 kHz, integrated high/low-side FETs, smaller SOT-23-6 package. | Higher current and integration reduce solution size but require external feedback resistors and careful layout for thermal management. | Select when >1 A load or ultra-compact footprint is required; avoid if fixed-output simplicity and SOIC-8 manufacturability are priorities. |
Compared with LM2675N-5.0/NOPB, LM2575HVS-5.0 trades higher input range and lower EMI for larger magnetics and reduced efficiency, while TPS54202DDCR delivers higher current and density at the cost of added design complexity and external component dependency.
Availability
LM2675N-5.0/NOPB is available at Aetrix Electronics and suitable for industrial PLC power supplies, embedded microcontroller core rails, automotive body control modules, and point-of-load sensor converters requiring stable component supply and long-lifecycle support.
Supply support for LM2675N-5.0/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 ease-of-use, minimal external component count, and robust operation in industrial, automotive, and communications power systems.
FAQ
What is the maximum input voltage rating for LM2675N-5.0/NOPB?
The absolute maximum input voltage for LM2675N-5.0/NOPB is 45 V, but the recommended operating range is 8 V to 40 V. Operation above 40 V risks exceeding safe junction temperature or violating SOA limits-even briefly-so 40 V is the practical upper limit for continuous operation per TI's recommended conditions. Exceeding this may trigger thermal shutdown or degrade long-term reliability.
Does LM2675N-5.0/NOPB require an external feedback resistor divider?
No. LM2675N-5.0/NOPB is the fixed 5 V output variant-the feedback reference is internally connected to the output, so the FB pin is not used and must be left unconnected or tied directly to VOUT per the datasheet. Only adjustable versions (e.g., LM2675MX-ADJ) require external resistors.
Can LM2675N-5.0/NOPB operate with a 6 V input supply?
No. LM2675N-5.0/NOPB has a minimum recommended input voltage of 8 V. At 6 V, the device cannot sustain 5 V output due to dropout limitations-its minimum duty cycle is 95%, and internal switch RDS(on) and diode forward voltage prevent regulation below ~7.5 V under load. Use LM2575HVS-5.0 for true 6 V cold-crank support.
What type of external diode is recommended for LM2675N-5.0/NOPB?
A Schottky diode rated ≥3 A and ≥50 V reverse voltage is recommended-TI specifies IR 30WQ05F (3.3 A, 50 V) in the typical application. Schottky selection minimizes forward voltage drop and switching losses; fast recovery diodes are not suitable due to excessive reverse recovery losses at 260 kHz.
Is LM2675N-5.0/NOPB RoHS-compliant and lead-free?
Yes. The /NOPB suffix explicitly denotes "No Lead (Pb)-Free" per TI's packaging nomenclature. LM2675N-5.0/NOPB meets RoHS Directive 2011/65/EU and is manufactured using lead-free solderable terminations and halogen-free molding compound.
LM2675N-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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):
- 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/NOPB FAQ
1.How can I place an order for LM2675N-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2675N-5.0/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 LM2675N-5.0/NOPB reliable?
The price and inventory of LM2675N-5.0/NOPB 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/NOPB is usually 5 days.
3.What payment methods are accepted for LM2675N-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2675N-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2675N-5.0/NOPB?
LM2675N-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2675N-5.0/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 LM2675N-5.0/NOPB?
For technical support, including LM2675N-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2675N-5.0/NOPB requirements.
6.How does Aetrix verify that LM2675N-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2675N-5.0/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 LM2675N-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2675N-5.0/NOPB?
All LM2675N-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2675N-5.0/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 LM2675N-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2675N-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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