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Texas Instruments LM22672MR-5.0/NOPB
- Part No.:
- LM22672MR-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22672MR-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,675
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Product details
Overview
LM22672MR-5.0/NOPB from Texas Instruments is a 42-V input, 1-A synchronous step-down DC/DC regulator with fixed 5.0 V output, 500 kHz switching frequency, ±1.5% feedback reference accuracy, and integrated 200 mΩ N-channel MOSFET. It operates across –40°C to 125°C junction temperature and supports industrial power conversion from 12 V or 24 V rails.
For engineers reviewing the LM22672MR-5.0/NOPB datasheet, LM22672MR-5.0/NOPB pinout, LM22672MR-5.0/NOPB application, or LM22672MR-5.0/NOPB equivalent, key selection criteria include its fixed 5 V output tolerance, internal compensation for ceramic output capacitors, precision enable threshold (1.6 V typ), adjustable soft-start via external capacitor, and SO PowerPAD™ thermal package for high-power-density designs.
Technical Context
The LM22672MR-5.0/NOPB implements voltage-mode PWM control with input voltage feedforward to stabilize loop gain against VIN variation, enabling optimized transient response without external compensation. Its internal Type III compensator is tuned for stable operation with low-ESR ceramic capacitors at 5 V output.
It integrates a bootstrap gate driver with internal diode, requiring only a 10 nF ceramic capacitor between BOOT and SW pins. The device supports three oscillator modes-internal 500 kHz default, resistor-adjustable (200 kHz–1 MHz), or external synchronization-though frequency adjustment and sync cannot operate simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports wide industrial and automotive supply rails including 12 V, 24 V, and legacy 5 V systems. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback resistors and ensures tight regulation over line/load/temperature. |
| Switching Frequency | 500 kHz (default), adjustable 200 kHz–1 MHz - enables compact magnetics and EMI-aware layout without sacrificing efficiency. |
| Max Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| MOSFET RDS(on) | 200 mΩ (typ) - reduces conduction loss and improves full-load efficiency (>90% typical at 12 VIN/5 VOUT). |
| Junction Temperature | –40°C to +125°C - qualified for harsh environments including industrial controls and telecom infrastructure. |
| Enable Threshold | 1.6 V (typ), 0.6 V hysteresis - allows precise power sequencing using simple resistor dividers from upstream rails. |
| Quiescent Current | 3.4 mA (typ) - minimizes standby power draw in always-on applications while maintaining fast wake-up. |
Pinout & Package
LM22672MR-5.0/NOPB uses the HSOP-8 (MR) package with exposed thermal pad (EP), measuring 4.89 mm × 3.90 mm. The exposed pad must be soldered to a PCB ground plane for optimal thermal performance (RθJA = 60°C/W with 1 in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply input | Provides gate drive voltage for internal high-side MOSFET; requires 10 nF ceramic capacitor to SW. |
| EN | Enable control input | Logic-level shutdown with 1.6 V threshold and 0.6 V hysteresis; draws only 25 µA in shutdown. |
| SW | Switch node output | Drives external inductor; swings from ~0 V to VIN; requires low-inductance routing to minimize EMI. |
| RT/SYNC | Oscillator mode control | Selects internal 500 kHz clock, resistor-tuned frequency (200 kHz–1 MHz), or external sync signal. |
| FB | Feedback reference input | Internally tied to 5.0 V reference; not externally accessible on -5.0 variant-no external divider needed. |
| GND | Power and signal ground | Common return path for power stage and control circuitry; connects directly to EP for thermal conduction. |
| VIN | Main power input | Accepts 4.5–42 V; requires local 10 µF ceramic input capacitor near VIN/GND pins. |
| SS | Soft-start timing input | Controls startup ramp time via external capacitor (100 nF–1 µF); resets on EN toggle or thermal shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated voltage-mode control | Eliminates need for external compensation network-reduces BOM count and design iteration time. |
| Stable with low-ESR ceramic capacitors | Enables use of small, reliable, high-frequency MLCCs instead of bulkier electrolytics or tantalums. |
| Integrated bootstrap diode | Removes requirement for external bootstrap diode-simplifies layout and improves reliability. |
| Adjustable soft-start | Prevents inrush current and output overshoot by controlling rise time via single external capacitor. |
| Thermal shutdown & current limiting | Protects against sustained overload or ambient overheating without external protection circuitry. |
| WEBENCH®-enabled | Supports full online design-including component selection, simulation, thermal analysis, and PCB layout export. |
Applications
| Industrial PLC I/O Module | Telecom Remote Radio Unit (RRU) |
|---|---|
Use Scenario: Powering isolated digital I/O drivers, ADCs, and CAN transceivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary 5 V buck regulator supplying logic and interface circuitry from 24 V field bus. Use Value: Fixed 5 V output ensures compatibility with standard logic families; wide VIN range accommodates brownout conditions on 24 V rail. |
Use Scenario: Generating clean 5 V bias for RF front-end amplifiers and FPGA configuration circuits in outdoor base stations. IC Role / Device Role / Timing Role: Point-of-load regulator delivering stable 5 V under variable thermal load and input ripple. Use Value: 125°C junction rating and thermal pad enable operation in sealed, fanless enclosures; 500 kHz switching avoids critical LTE band harmonics. |
| Automotive Body Control Module (BCM) | Embedded Medical Sensor Hub |
Use Scenario: Supplying microcontroller, LIN transceiver, and LED drivers in vehicle door modules. IC Role / Device Role / Timing Role: Main 5 V supply derived from 12 V battery with cold-crank tolerance down to 4.5 V. Use Value: Precision enable input allows controlled sequencing with ignition signal; AEC-Q100 Grade 1 qualification confirmed for LM22672-Q1 variant. |
Use Scenario: Providing regulated 5 V to low-noise analog front-ends, Bluetooth LE radios, and flash memory in portable diagnostic devices. IC Role / Device Role / Timing Role: Efficient, low-quiescent converter supporting battery-powered operation with >100-hour standby life. Use Value: 3.4 mA quiescent current and 25 µA shutdown current extend battery runtime; SO PowerPAD package aids thermal management in compact housings. |
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 minimum input voltage; identical 5 V output, 1 A rating, and SO PowerPAD package. | Better suited for 3.3 V–5 V input systems (e.g., USB PD-derived rails); less suitable for 24 V industrial inputs. | Select when input voltage may dip below 4.5 V; verify stability with lower VIN during transient testing. |
| TPS54202DRCT | 4.5–28 V input, 2 A output, 500 kHz fixed frequency, but no integrated bootstrap diode or adjustable soft-start. | Higher current capability for future-proofing; requires external bootstrap diode and lacks SS pin flexibility. | Choose if 2 A headroom is required and board space permits added discrete components. |
Compared with LM22672MR-5.0/NOPB, LM22670MR-5.0/NOPB offers wider low-VIN coverage but reduced max input (28 V vs 42 V), while TPS54202DRCT delivers higher current but increases design complexity with external bootstrap and fixed soft-start behavior.
Availability
LM22672MR-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom infrastructure, and embedded medical systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM22672MR-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 LM22672 series belongs to TI's SIMPLE SWITCHER® family-designed specifically for ease-of-use in cost-sensitive, space-constrained industrial and automotive power supplies where minimal external components and rapid design-in are critical.
FAQ
What is the maximum input voltage rating for LM22672MR-5.0/NOPB?
The absolute maximum input voltage for LM22672MR-5.0/NOPB is 43 V, with recommended operating range from 4.5 V to 42 V. Exceeding 43 V risks permanent damage. The device maintains regulation and efficiency across this full range, making it suitable for 24 V industrial systems with surge tolerance.
Does LM22672MR-5.0/NOPB require external feedback resistors?
No. LM22672MR-5.0/NOPB has an internally trimmed 5.0 V reference connected to the FB pin, eliminating the need for external resistors. This simplifies layout, improves accuracy (±1.5% over temperature), and removes resistor tolerance and drift as error sources-unlike the adjustable LM22672-ADJ variant.
Can LM22672MR-5.0/NOPB synchronize to an external clock?
Yes. When the RT/SYNC pin is driven with a clean square wave between 1.75 V and 3.5 V at 50% duty cycle and frequency between 500 kHz and 1 MHz, LM22672MR-5.0/NOPB synchronizes to the rising edge. Note: synchronization disables current limit foldback, and the external clock must exceed the internal 500 kHz frequency.
What thermal performance can be expected from LM22672MR-5.0/NOPB in a standard PCB layout?
With 1 in² of 2-oz copper connected to the exposed pad (EP), LM22672MR-5.0/NOPB achieves RθJA = 60°C/W. At 1 A load and 12 V input, typical power dissipation is ~0.5 W, resulting in ~30°C junction-to-ambient rise-well within the –40°C to 125°C operating range. Thermal relief vias under the EP are strongly recommended.
Is LM22672MR-5.0/NOPB pin-compatible with other members of the LM2267x family?
Yes. LM22672MR-5.0/NOPB shares identical HSOP-8 (MR) pinout and footprint with LM22672-ADJ, LM22672-Q1, and LM22670 variants. However, FB pin functionality differs: the -5.0 version fixes the reference internally, so FB is not externally accessible-no external divider is used or required.
LM22672MR-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
LM22672MR-5.0/NOPB FAQ
1.How can I place an order for LM22672MR-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22672MR-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 LM22672MR-5.0/NOPB reliable?
The price and inventory of LM22672MR-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 LM22672MR-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22672MR-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22672MR-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22672MR-5.0/NOPB?
LM22672MR-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22672MR-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 LM22672MR-5.0/NOPB?
For technical support, including LM22672MR-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22672MR-5.0/NOPB requirements.
6.How does Aetrix verify that LM22672MR-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22672MR-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 LM22672MR-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22672MR-5.0/NOPB?
All LM22672MR-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22672MR-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 LM22672MR-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22672MR-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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