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Texas Instruments LM2675LD-5.0/NOPB
- Part No.:
- LM2675LD-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LM2675LD-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 16WSON
- Quantity:
- Payment:
- Shipping:
Inventory:297
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Product details
Overview
LM2675LD-5.0/NOPB from Texas Instruments is a monolithic step-down (buck) DC-DC switching regulator delivering 5 V at up to 1 A output current, with ±1.5% output voltage tolerance, 260 kHz fixed-frequency operation, and 90% efficiency at 12 V input/1 A load. It integrates a DMOS power MOSFET switch, internal frequency compensation, and thermal/current protection - designed for compact, high-efficiency power conversion in industrial and embedded systems.
For engineers reviewing the LM2675LD-5.0/NOPB datasheet, LM2675LD-5.0/NOPB pinout, LM2675LD-5.0/NOPB application, or LM2675LD-5.0/NOPB equivalent, key selection considerations include its 8-pin SOIC (D) package, 6.5–40 V input range, TTL-compatible ON/OFF control, bootstrapped high-side gate drive, and fixed 5 V output eliminating external feedback resistors.
Technical Context
The LM2675LD-5.0/NOPB implements a synchronous-free buck topology using an integrated DMOS high-side switch and external catch diode. Its 260 kHz oscillator enables use of small, low-ESR ceramic or tantalum output capacitors and standard off-the-shelf inductors (e.g., 33–68 µH). Internal frequency compensation eliminates external compensation components.
Operation includes active-mode regulation with cycle-by-cycle current limiting and thermal shutdown, plus TTL-compatible shutdown mode drawing only 50 µA standby current. The FB pin is internally tied to the 5 V output, confirming fixed-output configuration - no external divider required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over line/load/temperature - ensures stable rail for microcontrollers and analog circuitry without trimming. |
| Max Output Current | 1 A continuous - supports single-rail digital loads like MCU cores, sensors, and interface ICs. |
| Input Voltage Range | 6.5 V to 40 V - accommodates 12 V and 24 V industrial buses, automotive battery variations, and unregulated AC/DC supplies. |
| Switching Frequency | 260 kHz ±10% - balances EMI control and component size; enables use of standard 33–68 µH inductors and ≤100 µF output capacitance. |
| Efficiency | 90% typical at VIN = 12 V, IOUT = 1 A - minimizes thermal stress; PCB copper traces suffice as heatsink under full load. |
| Quiescent Current | 3.6 mA typical active, 50 µA standby - enables low-power sleep modes in battery-backed or energy-conscious systems. |
| Protection Features | Thermal shutdown, cycle-by-cycle current limit, and frequency foldback during short-circuit - prevents damage during fault conditions without external circuitry. |
Pinout & Package
LM2675LD-5.0/NOPB uses the 8-pin SOIC (D) package (4.9 mm × 6 mm), with exposed pad grounded for thermal performance. Pin functions are validated per TI SNVS129G Rev G.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB (Pin 1) | Bootstrap capacitor connection | Connects 470 nF ceramic cap between CB and VSW to bias high-side DMOS gate - critical for proper switch turn-on. |
| NC (Pins 2, 3) | No-connect | Internally unused; must remain unconnected - floating or grounded per layout best practice. |
| FB (Pin 4) | Feedback sense input | Internally connected to 5 V output - no external resistor divider needed; confirms fixed-output configuration. |
| ON/OFF (Pin 5) | Enable control input | TTL-compatible: ≥1.4 V enables regulation; ≤0.8 V disables with 50 µA standby current - supports microcontroller GPIO control. |
| VIN (Pin 7) | Main power input | Accepts 6.5–40 V; requires local 22 µF tantalum bypass capacitor with short, low-inductance path to GND. |
| VSW (Pin 8) | Switch node output | Drives external Schottky catch diode and inductor - high dv/dt node requiring careful PCB routing and ground plane isolation. |
| GND (Pin 6) | Power ground | Primary return path for input capacitor, output capacitor, and thermal pad - must connect directly to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS power switch | Eliminates need for external high-side MOSFET; RDS(on) = 0.3 Ω max ensures <1 W conduction loss at 1 A. |
| Patented internal frequency compensation | Removes requirement for external compensation network - reduces BOM count and design iteration time. |
| Fixed 5 V output configuration | FB pin factory-connected to internal 5 V reference - removes feedback resistors, improves accuracy, and simplifies layout. |
| TTL shutdown with ultra-low standby current | ON/OFF pin draws only 50 µA in shutdown - suitable for systems requiring rapid wake/sleep transitions without auxiliary LDOs. |
| Thermal and current-limit protection | Auto-recovering shutdown prevents latch-up during overload or ambient temperature rise - no external sensing or reset circuitry needed. |
Applications
| Industrial PLC I/O Module Power | Embedded Microcontroller Core Supply |
|---|---|
Use Scenario: Powering isolated digital I/O channels in programmable logic controllers operating from 24 V DC bus. IC Role / Device Role / Timing Role: Primary 5 V buck regulator supplying logic-level translation, optocoupler drivers, and ADC reference rails. Use Value: Delivers clean, regulated 5 V at 1 A with 90% efficiency - avoids heat buildup in sealed enclosures and maintains stability across wide input transients. | Use Scenario: Generating core voltage for ARM Cortex-M or RISC-V microcontrollers in edge sensor nodes. IC Role / Device Role / Timing Role: Main system power supply enabling low-noise analog peripherals and real-time clock operation. Use Value: Fixed 5 V output with ±1.5% tolerance ensures reliable boot and peripheral initialization; 50 µA shutdown supports multi-day battery life in sleep mode. |
| Automotive Body Control Unit (BCU) | Point-of-Load Converter for Industrial HMI |
Use Scenario: Regulating 5 V rail for CAN transceivers, LED drivers, and window/mirror control ICs in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Secondary buck converter stepping down from main 12 V battery rail after front-end protection. Use Value: 6.5–40 V input range tolerates cold-crank (6.5 V) and load-dump (up to 40 V) events; thermal shutdown prevents failure during under-hood temperature excursions. | Use Scenario: Providing dedicated 5 V supply to touch controller, display backlight driver, and USB interface in panel-mounted HMIs. IC Role / Device Role / Timing Role: Local point-of-load regulator minimizing voltage drop and noise coupling from shared 24 V backplane. Use Value: Compact SOIC-8 footprint and minimal external parts (5 components total) reduce PCB area; 260 kHz switching avoids audible noise in user-facing equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2675M-5.0/NOPB | Same electrical specs; uses 8-pin PDIP (P) package instead of SOIC (D) - larger footprint, higher thermal resistance (95 °C/W vs. 105 °C/W). | Preferred for through-hole prototyping or legacy board rework where SOIC reflow is unavailable. | Select when manual assembly, socketing, or higher creepage distance is required - not drop-in compatible due to different land pattern. |
| LM2575HVS-5.0 | 5 V fixed version with 60 V max input, 52 kHz switching, and 3 A capability - larger inductor/capacitor requirements and lower efficiency (~75%) at 1 A. | Suitable for high-input-voltage or higher-current designs where 260 kHz EMI is problematic. | Choose only if input exceeds 40 V or output current >1 A is needed - not pin-compatible; requires full schematic/layout revision. |
Compared with LM2675M-5.0/NOPB, the LM2675LD-5.0/NOPB offers superior thermal performance in surface-mount production; versus LM2575HVS-5.0, it delivers higher efficiency and smaller passive components at the cost of lower max input voltage and current rating.
Availability
LM2675LD-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, embedded microcontroller power, and automotive body electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2675LD-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 - engineered for ease of use in cost-sensitive, space-constrained DC-DC applications where minimal external components and robust protection are essential.
FAQ
What is the maximum input voltage rating for LM2675LD-5.0/NOPB?
The absolute maximum input voltage for LM2675LD-5.0/NOPB is 45 V, but the recommended operating range is 6.5 V to 40 V per TI SNVS129G. Exceeding 40 V risks violating safe operating area limits and may trigger overvoltage protection or permanent damage. For automotive cold-crank scenarios, the 6.5 V minimum ensures startup reliability.
Does LM2675LD-5.0/NOPB require external feedback resistors?
No. LM2675LD-5.0/NOPB is a fixed 5 V output variant - its FB pin is internally connected to the 5 V output node, eliminating the need for external resistor dividers. This simplifies layout, improves output accuracy (±1.5%), and removes drift sources associated with external resistor tolerances and temperature coefficients.
What type of external diode is recommended for LM2675LD-5.0/NOPB?
A Schottky rectifier with ≥3 A average current rating and ≥50 V reverse voltage is recommended - e.g., IR 30WQ05F or equivalent. Schottky diodes minimize forward voltage drop (typically 0.4–0.5 V), reducing conduction losses and improving overall efficiency. Fast recovery or silicon diodes are not recommended due to higher losses and potential ringing.
Can LM2675LD-5.0/NOPB be used in thermally constrained environments?
Yes. At 90% efficiency and 1 A load, LM2675LD-5.0/NOPB dissipates ~0.5 W - sufficient for PCB copper traces to act as the sole heatsink when using the SOIC-8 package with proper thermal pad grounding. TI specifies RθJA = 105 °C/W on a 4-layer JEDEC board; adding 1 in² of 2-oz copper around the GND pad further reduces thermal resistance by ~20 °C/W.
Is LM2675LD-5.0/NOPB pin-compatible with other LM2675 variants?
LM2675LD-5.0/NOPB shares identical pinout and function with all 8-pin SOIC (D-package) LM2675 variants (e.g., LM2675LD-3.3/NOPB, LM2675LD-ADJ/NOPB), differing only in internal feedback configuration. However, it is not pin-compatible with PDIP (P) or WSON (NHN) packages - those have different pin counts, layouts, and thermal pad requirements.
LM2675LD-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 16-WSON (5x5)
LM2675LD-5.0/NOPB FAQ
1.How can I place an order for LM2675LD-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2675LD-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 LM2675LD-5.0/NOPB reliable?
The price and inventory of LM2675LD-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 LM2675LD-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2675LD-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2675LD-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2675LD-5.0/NOPB?
LM2675LD-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2675LD-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 LM2675LD-5.0/NOPB?
For technical support, including LM2675LD-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2675LD-5.0/NOPB requirements.
6.How does Aetrix verify that LM2675LD-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2675LD-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 LM2675LD-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2675LD-5.0/NOPB?
All LM2675LD-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2675LD-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 LM2675LD-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2675LD-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2675LD-5.0/NOPB Tags
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