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Texas Instruments LM22675MR-5.0/NOPB
- Part No.:
- LM22675MR-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22675MR-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:862
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Product details
Overview
LM22675MR-5.0/NOPB from Texas Instruments is a 42 V, 1 A synchronous step-down DC/DC regulator in an HSOP-8 PowerPAD package, delivering a fixed 5.0 V output with ±1.5% feedback reference accuracy, 500 kHz switching frequency, and integrated 200 mΩ N-channel MOSFET. It operates across –40°C to 125°C junction temperature and supports industrial control, telecom power, and embedded systems requiring stable 5 V rail generation from 4.5–42 V inputs.
For engineers reviewing the LM22675MR-5.0/NOPB datasheet, LM22675MR-5.0/NOPB pinout, LM22675MR-5.0/NOPB application, or LM22675MR-5.0/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), fixed 5 V output tolerance, thermal performance in HSOP-8 PowerPAD, enable threshold hysteresis (0.6 V), and compatibility with low-ESR ceramic output capacitors without external compensation.
Technical Context
The LM22675MR-5.0/NOPB implements voltage-mode PWM control with input voltage feedforward for stable loop gain across wide VIN ranges. Its internal Type III compensation is optimized for fixed 5 V output, eliminating need for external compensation components.
It integrates a bootstrap diode, soft-start (500 µs typ), precision enable input (1.6 V threshold, 0.6 V hysteresis), and thermal shutdown (150°C trip). The switch node (SW) drives an external Schottky diode while BOOT supplies gate drive via external 10 nF ceramic capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over –40°C to 125°C; eliminates external feedback divider |
| Input Voltage Range | 4.5 V to 42 V; supports 12 V, 24 V, and 36 V industrial rails with margin |
| Switching Frequency | 500 kHz ±20%; enables compact 2.2 µH inductors and <1000 µF ceramic output capacitance |
| Max Output Current | 1 A continuous; limited by internal 200 mΩ MOSFET RDS(ON) and thermal resistance (60°C/W) |
| Quiescent Current | 3.4 mA typical at VOUT = 5 V; enables low-noise operation without standby mode overhead |
| Enable Threshold | 1.6 V (typ) falling edge with 0.6 V hysteresis; allows precise power sequencing using resistor dividers |
| Thermal Shutdown | 150°C junction trip point with 135°C hysteresis; protects against sustained overload or poor PCB heatsinking |
Pinout & Package
LM22675MR-5.0/NOPB uses the HSOP-8 PowerPAD package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply input | Connects to SW via 10 nF ceramic capacitor; provides gate drive voltage for internal high-side MOSFET |
| EN | Enable control input | Logic-level input with 1.6 V threshold and 0.6 V hysteresis; pulls up internally at 6 µA |
| SW | Switch node output | Drives external Schottky diode cathode; swings from ~0 V to VIN during operation |
| FB | Feedback reference | Internally tied to 5 V output; no external resistor divider required for fixed-output configuration |
| GND | Power and signal ground | Common return for all circuits; connects directly to exposed thermal pad |
| VIN | Main input supply | Accepts 4.5–42 V; requires local 10 µF ceramic input capacitor near pin |
| NC | No connect | Pins 2 and 3 are unconnected die pads; serve only as thermal conduction paths |
| EP | Exposed thermal pad | Mandatory connection to PCB ground plane; primary path for heat dissipation (RθJA = 60°C/W @ 1 in² copper) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated boot-strap diode | Eliminates external bootstrap diode; reduces BOM count and layout complexity |
| Stable with ceramic capacitors | Supports low-ESR ceramic output caps down to 22 µF; avoids electrolytic capacitor aging and leakage issues |
| Internal soft-start | 500 µs fixed ramp time prevents inrush current and output overshoot during startup |
| WEBENCH® enabled | Direct integration with TI's WEBENCH Designer for automated component selection, simulation, and thermal analysis |
| Thermal shutdown + current limit | Combines 150°C junction protection and 1.3–1.7 A peak current limit to prevent damage under fault conditions |
Applications
| Industrial Control Power | Telecom Line Card Supply |
|---|---|
Use Scenario: Providing regulated 5 V rail for PLC I/O modules powered from 24 V DC bus with transient surges up to 40 V. IC Role / Device Role / Timing Role: Primary buck regulator converting 24 V input to isolated 5 V logic supply with fast load transient response. Use Value: Fixed 5 V output ensures consistent microcontroller and sensor interface voltage; 42 V max input withstands load-dump transients per ISO 7637-2. | Use Scenario: Generating 5 V for FPGA configuration and management circuitry on telecom line cards fed from -48 V backplane via intermediate 12 V rail. IC Role / Device Role / Timing Role: Secondary-stage point-of-load regulator delivering clean 5 V at ≤1 A with minimal board space. Use Value: 500 kHz switching enables small 2.2 µH inductor and 100 µF ceramic cap; HSOP-8 PowerPAD simplifies thermal design in dense card layouts. |
| Embedded System Main Rail | Automotive Body Control Module |
Use Scenario: Powering ARM Cortex-M7 MCU, Ethernet PHY, and CAN transceiver in ruggedized edge gateway operating from 12 V vehicle battery. IC Role / Device Role / Timing Role: High-efficiency main system regulator with precision enable for controlled power-up sequencing. Use Value: ±1.5% output accuracy maintains MCU core voltage stability; enable hysteresis prevents oscillation during brownout conditions. | Use Scenario: Supplying 5 V to microcontroller and LIN transceiver in body control unit exposed to automotive temperature extremes and EMI. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 qualified buck converter (via LM22675-Q1 variant) delivering robust 5 V rail. Use Value: –40°C to 125°C operation ensures reliability in engine bay proximity; integrated soft-start prevents fuse blowing during cold cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670MR-5.0/NOPB | Lower 3 V min input (vs 4.5 V), same 5 V output, 150 mΩ RDS(ON), 650 kHz fSW | Better efficiency below 5 V input; not suitable for 12 V+ industrial rails with UVLO margin | Select when input can dip below 4.5 V; verify thermal performance at 1 A with lower RDS(ON) |
| TPS54302DDAR | 3.5–28 V input, 5 V fixed output, 3 A capability, 2.2 MHz fSW, no integrated bootstrap diode | Higher current and frequency; requires external bootstrap diode and compensation network | Choose for >1 A loads or space-constrained designs needing smaller magnetics; adds design complexity |
Compared with LM22675MR-5.0/NOPB, LM22670MR-5.0/NOPB offers lower minimum input but reduced high-voltage robustness, while TPS54302DDAR delivers higher current and frequency at the cost of added external components and loss of integrated bootstrap functionality.
Availability
LM22675MR-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power, and embedded systems requiring stable component supply with long-term manufacturability and automotive-grade variants.
Supply support for LM22675MR-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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM22675MR-5.0/NOPB belongs to TI's SIMPLE SWITCHER® family-designed for ease-of-use in industrial, telecom, and automotive power applications where minimal external components and proven thermal performance are critical.
FAQ
What is the maximum input voltage rating for LM22675MR-5.0/NOPB?
The absolute maximum input voltage for LM22675MR-5.0/NOPB is 43 V, with recommended operating range from 4.5 V to 42 V. Exceeding 42 V risks violating safe operating area limits, especially under high ambient temperatures or poor PCB thermal design. The device's 42 V rating supports common 24 V and 36 V industrial rails with sufficient margin for transients.
Does LM22675MR-5.0/NOPB require external compensation components?
No, LM22675MR-5.0/NOPB features fully internal Type III loop compensation optimized for its fixed 5 V output configuration. This eliminates the need for external compensation resistors or capacitors, reducing design time and BOM count. Stability is guaranteed across standard inductor and ceramic capacitor combinations meeting TI's application guidelines.
Can LM22675MR-5.0/NOPB operate with ceramic output capacitors only?
Yes, LM22675MR-5.0/NOPB is explicitly designed to be stable with low-ESR ceramic output capacitors-no electrolytic or tantalum capacitors required. TI recommends ≥22 µF total ceramic capacitance with appropriate voltage rating; layout best practices (short traces, ground plane under IC) ensure optimal transient response and EMI performance.
What is the purpose of the NC pins on LM22675MR-5.0/NOPB?
Pins 2 and 3 on LM22675MR-5.0/NOPB are designated NC (No Connect) - they have no internal electrical connection but serve as thermal conduction paths from the die to the PCB. These pins must be left unconnected electrically but may be soldered to copper pour to enhance thermal transfer, improving power handling capability in high-ambient environments.
How does the enable function behave during input undervoltage conditions?
The LM22675MR-5.0/NOPB includes both precision enable (EN) and internal UVLO. EN has a 1.6 V threshold with 0.6 V hysteresis for controlled sequencing, while internal UVLO activates at ~4.3 V (rising) and ~3.9 V (falling). If EN is left floating or pulled high, the part relies on UVLO; if EN is actively driven, it overrides UVLO, allowing custom turn-on thresholds using resistor dividers from VIN.
LM22675MR-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (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):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM22675MR-5.0/NOPB FAQ
1.How can I place an order for LM22675MR-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22675MR-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 LM22675MR-5.0/NOPB reliable?
The price and inventory of LM22675MR-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 LM22675MR-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22675MR-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22675MR-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22675MR-5.0/NOPB?
LM22675MR-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22675MR-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 LM22675MR-5.0/NOPB?
For technical support, including LM22675MR-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22675MR-5.0/NOPB requirements.
6.How does Aetrix verify that LM22675MR-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22675MR-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 LM22675MR-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22675MR-5.0/NOPB?
All LM22675MR-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22675MR-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 LM22675MR-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22675MR-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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