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Texas Instruments LM22676MR-5.0/NOPB
- Part No.:
- LM22676MR-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22676MR-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,771
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Product details
Overview
LM22676MR-5.0/NOPB from Texas Instruments is a 42 V, 3 A synchronous step-down DC/DC regulator in an 8-pin SO PowerPAD™ package, featuring fixed 5.0 V output, 500 kHz switching frequency, ±1.5% feedback reference accuracy, and integrated bootstrap diode. It delivers high efficiency (>90%) in industrial power rails converting 12 V or 24 V input to stable 5 V for microcontrollers and peripherals.
For engineers reviewing the LM22676MR-5.0/NOPB datasheet, LM22676MR-5.0/NOPB pinout, LM22676MR-5.0/NOPB application, or LM22676MR-5.0/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance with exposed pad, internal compensation for ceramic output capacitors, and precision enable functionality with 1.6 V threshold.
Technical Context
The LM22676MR-5.0/NOPB implements voltage-mode PWM control with input voltage feedforward to stabilize loop gain across wide VIN variations. Its internal Type III compensation is optimized for fixed 5 V output, eliminating external compensation components.
It integrates a 120 mΩ N-channel MOSFET switch, bootstrap gate driver with integrated diode, soft-start (500 µs typ), and precision enable with 0.6 V hysteresis. Thermal shutdown activates at 150°C, and current limiting protects against overloads up to 5.5 A peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% (ensures stable logic supply without external feedback resistors) |
| Input Voltage Range | 4.5 V to 42 V (supports 12 V/24 V industrial rails and automotive cold-crank transients) |
| Max Output Current | 3 A continuous (enables single-regulator power for MCU + peripheral subsystems) |
| Switching Frequency | 500 kHz ±20% (enables compact 10 µH inductors and low-ESR ceramic output capacitors) |
| RDS(ON) | 120 mΩ (SO PowerPAD™ package; reduces conduction loss and thermal rise at full load) |
| Quiescent Current | 3.4 mA (typ) in operation; 25 µA (typ) in shutdown (extends battery life in always-on systems) |
| Enable Threshold | 1.6 V (typ) with 0.6 V hysteresis (enables reliable sequencing with resistor dividers from other rails) |
Pinout & Package
LM22676MR-5.0/NOPB uses the SO PowerPAD™ (DDA) 8-pin package with thermally enhanced exposed pad soldered to PCB ground plane for improved thermal dissipation (RθJA = 60°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Drives external inductor; swings between GND and VIN; requires low-inductance layout |
| 2 VIN | Power input | Accepts 4.5–42 V; bypassed with ≥10 µF ceramic capacitor near pin |
| 3 BOOT | Bootstrap supply | Connects to SW via 10 nF ceramic capacitor; powers high-side gate driver |
| 4 GND | System ground | Power and signal return; tied to exposed pad for thermal and electrical integrity |
| 5 EN | Enable control | Active-high; 1.6 V threshold; internal 6 µA pullup enables simple resistor-based sequencing |
| 6 FB | Feedback input | Internally connected to 5 V divider; shorted to VOUT for fixed-output operation |
| 7 NC | No connect | Thermal pad only; no electrical function; must remain unconnected |
| 8 NC | No connect | Thermal pad only; no electrical function; must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode; reduces BOM count and layout area while ensuring reliable gate drive |
| Stable with ceramic capacitors | Internal compensation supports low-ESR ceramic output caps (no electrolytic required), improving reliability and size |
| Thermal shutdown & current limit | 150°C trip point and 5.5 A peak current limit protect against sustained overload and PCB overheating |
| Soft-start (500 µs) | Prevents inrush current and output overshoot during power-up; no external component needed |
| WEBENCH® enabled | Full design support in TI's online tool including component selection, simulation, and thermal analysis |
Applications
| Industrial PLC I/O Module | Telecom Line Card Power |
|---|---|
|
Use Scenario: Converting 24 V backplane supply to clean 5 V for digital isolators and ADCs in modular I/O units. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5 V with <10 mV ripple under dynamic load steps. Use Value: Fixed 5 V output eliminates feedback resistor errors; 42 V max input withstands 24 V rail surges per IEC 61000-4-5. |
Use Scenario: Generating local 5 V rail on telecom line cards powered from –48 V intermediate bus via isolated DC/DC. IC Role / Device Role / Timing Role: Secondary non-isolated buck stage providing low-noise 5 V for FPGA configuration and management ICs. Use Value: 500 kHz switching enables small magnetics; SO PowerPAD™ package meets telecom thermal derating requirements. |
| Automotive Body Control Module | Embedded Edge Gateway |
|
Use Scenario: Powering CAN transceivers and microcontroller cores from vehicle battery (9–16 V nominal, up to 42 V during load dump). IC Role / Device Role / Timing Role: Main 5 V system rail regulator with precision enable for controlled power sequencing during ignition cycles. Use Value: –40°C to 125°C junction rating and AEC-Q100 qualified variants ensure robustness; 25 µA shutdown current minimizes battery drain. |
Use Scenario: Supplying 5 V to ARM-based SoC, Wi-Fi/BLE modules, and USB peripherals in smart sensor gateways. IC Role / Device Role / Timing Role: High-efficiency primary regulator supporting burst-mode operation for low-power sleep states. Use Value: >90% efficiency at 1 A load extends runtime; integrated soft-start prevents brownout during wake-up transitions. |
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 36 V max input; same 5 V output, 3 A, SO PowerPAD™ package, and 500 kHz frequency | Suitable where input never exceeds 36 V; lower cost but not rated for 42 V transients | Select when 24 V systems lack load-dump risk and cost sensitivity outweighs margin needs |
| TPS54340DDAR | 42 V input, adjustable output, 3.5 A, 500 kHz, but requires external compensation and feedback resistors | Used when variable output or tighter regulation tolerance (<±1%) is required | Choose when design flexibility justifies added BOM and layout complexity versus LM22676MR-5.0/NOPB's simplicity |
Compared with LM22676MR-5.0/NOPB, LM22670MR-5.0/NOPB trades transient robustness for cost in benign-input environments, while TPS54340DDAR adds design flexibility at the expense of fixed-output convenience and internal compensation.
Availability
LM22676MR-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power, and embedded gateway applications requiring stable component supply, long-term lifecycle support, and automotive-grade thermal resilience.
Supply support for LM22676MR-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 DC/DC conversion.
The LM22676MR-5.0/NOPB belongs to TI's SIMPLE SWITCHER® family-designed for ease-of-use in industrial, automotive, and telecom power supplies where minimal external components and fast time-to-market are critical.
FAQ
What is the maximum input voltage rating for LM22676MR-5.0/NOPB?
The LM22676MR-5.0/NOPB has an absolute maximum input voltage of 43 V, with recommended operation from 4.5 V to 42 V. This allows it to safely handle automotive load-dump transients and industrial 24 V rail surges without external protection circuitry. The device maintains regulation and thermal safety across this full range when properly heatsinked via its exposed pad.
Does LM22676MR-5.0/NOPB require external feedback resistors?
No, LM22676MR-5.0/NOPB does not require external feedback resistors. Its internal resistor divider is factory-trimmed to deliver a precise fixed 5.0 V output. The FB pin is internally connected to this network and must be shorted directly to the output capacitor's VOUT node for proper operation-no external components are needed for voltage setting.
How is thermal performance managed in LM22676MR-5.0/NOPB?
LM22676MR-5.0/NOPB uses an SO PowerPAD™ package with an exposed thermal pad that must be soldered to a large PCB copper area connected to system ground. This achieves a junction-to-ambient thermal resistance of 60°C/W. At 3 A load and 12 V input, typical junction temperature rise is ~45°C above ambient-well within the –40°C to 125°C operating range when layout guidelines are followed.
Can LM22676MR-5.0/NOPB be used in automotive applications?
Yes-while LM22676MR-5.0/NOPB itself is not AEC-Q100 qualified, the pin-compatible LM22676QMR-5.0/NOPB variant is AEC-Q100 Grade 1 qualified (–40°C to +125°C). Both share identical electrical specs and package; only qualification testing differs. For production automotive use, LM22676QMR-5.0/NOPB is the designated part, but LM22676MR-5.0/NOPB serves well in prototyping and non-safety-critical automotive subsystems.
What type of external diode is required with LM22676MR-5.0/NOPB?
LM22676MR-5.0/NOPB requires an external Schottky diode (e.g., 60 V, 5 A rating) connected from SW to VOUT. Ultra-fast or standard PN diodes must be avoided due to reverse recovery current spikes that can damage the IC. The Schottky's low forward voltage and near-zero reverse recovery minimize losses and EMI in high-VIN, low-VOUT conversions typical of this regulator's use cases.
LM22676MR-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:
- 3A
- 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
LM22676MR-5.0/NOPB FAQ
1.How can I place an order for LM22676MR-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22676MR-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 LM22676MR-5.0/NOPB reliable?
The price and inventory of LM22676MR-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 LM22676MR-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22676MR-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22676MR-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22676MR-5.0/NOPB?
LM22676MR-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22676MR-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 LM22676MR-5.0/NOPB?
For technical support, including LM22676MR-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22676MR-5.0/NOPB requirements.
6.How does Aetrix verify that LM22676MR-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22676MR-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 LM22676MR-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22676MR-5.0/NOPB?
All LM22676MR-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22676MR-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 LM22676MR-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22676MR-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22676MR-5.0/NOPB Tags
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