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Texas Instruments LM22672MRX-5.0/NOPB
- Part No.:
- LM22672MRX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22672MRX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM22672MRX-5.0/NOPB from Texas Instruments is a 42-V, 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 control, telecom power, and embedded systems requiring stable 5 V rails from 12 V or 24 V inputs.
For engineers reviewing the LM22672MRX-5.0/NOPB datasheet, LM22672MRX-5.0/NOPB pinout, LM22672MRX-5.0/NOPB application, or LM22672MRX-5.0/NOPB equivalent, key selection considerations include input voltage range (4.5–42 V), thermal performance in HSOP-8 PowerPAD package, soft-start programmability via SS pin, and compatibility with low-ESR ceramic output capacitors without external compensation.
Technical Context
The LM22672MRX-5.0/NOPB implements voltage-mode PWM control with input voltage feedforward for loop gain stabilization, enabling robust transient response across wide VIN ranges. Its internal Type III compensation is optimized for fixed 5 V output and eliminates need for external compensation components.
It integrates a bootstrap diode and gate driver for high-side N-MOSFET operation, requires external BOOT-SW capacitor for gate drive, and 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 direct conversion from 12 V, 24 V, and 42 V industrial/automotive rails without pre-regulation. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider; enables precise 5 V logic/system rail generation. |
| Switching Frequency | 500 kHz (default), adjustable 200 kHz–1 MHz - balances EMI, efficiency, and component size; supports synchronization to system clock. |
| Max Output Current | 1 A continuous - sufficient for microcontrollers, FPGAs, and interface ICs in space-constrained designs. |
| RDS(ON) | 200 mΩ (typ) - reduces conduction loss and thermal rise at full load; enables >90% peak efficiency. |
| Quiescent Current | 3.4 mA (typ) - minimizes no-load power draw in always-on subsystems; drops to 25 µA in shutdown. |
| Junction Temp Range | –40°C to +125°C - qualified for industrial and automotive under-hood environments without derating. |
Pinout & Package
LM22672MRX-5.0/NOPB uses an HSOP-8 package with exposed thermal pad (MR suffix), measuring 4.89 mm × 3.90 mm. The exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply input | Provides gate drive voltage for internal high-side N-MOSFET; requires 10 nF ceramic capacitor between BOOT and SW. |
| EN | Enable control input | Logic-level enable with 1.6 V threshold and 0.6 V hysteresis; supports precise power sequencing and external UVLO. |
| SW | Switch node output | Drives external inductor; swings from GND to VIN; requires low-inductance layout to minimize EMI and ringing. |
| FB | Feedback reference input | Internally tied to 5.0 V reference; not connected externally for fixed-output version. |
| GND | Power and signal ground | Common return for internal circuitry and power stage; must be connected to exposed pad for thermal path. |
| RT/SYNC | Oscillator mode control | Selects internal 500 kHz, resistor-adjusted, or external synchronized mode; latched at startup. |
| SS | Soft-start timing input | Sets startup ramp time via external capacitor; extends internal ~500 µs ramp to prevent inrush current stress. |
| VIN | Main power input | Accepts 4.5–42 V; supplies internal LDO, gate driver, and control circuitry; requires local 10 µF ceramic bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated voltage-mode control | Eliminates external compensation network; simplifies design and improves consistency across production units. |
| Stable with low-ESR ceramic capacitors | Enables use of compact, high-reliability X7R/X5R MLCCs instead of bulkier electrolytics or tantalums. |
| Integrated bootstrap diode | Removes need for external bootstrap diode; reduces BOM count and layout complexity in high-side gate drive path. |
| Adjustable soft-start | Prevents input inrush and output overshoot via single external capacitor on SS pin; supports system-level power sequencing. |
| Precision enable with UVLO | Allows clean turn-on/turn-off control and configurable undervoltage lockout using simple resistor divider from VIN. |
Applications
| Industrial PLC I/O Module | Telecom Line Card Power |
|---|---|
Use Scenario: Powering isolated digital I/O channels and analog sensor interfaces in programmable logic controllers operating from 24 V DC bus. IC Role / Device Role / Timing Role: Primary 5 V buck converter supplying MCU, ADC, and level-shifting logic; provides regulated rail independent of bus ripple. Use Value: High input voltage tolerance (up to 42 V) accommodates 24 V bus transients; thermal robustness ensures reliability in enclosed cabinets. | Use Scenario: Generating 5 V auxiliary supply for FPGA configuration, SerDes PHYs, and management controllers on telecom line cards fed from -48 V or +24 V backplane. IC Role / Device Role / Timing Role: Secondary point-of-load regulator converting intermediate 12 V rail to stable 5 V; synchronized to system clock to reduce EMI coupling. Use Value: 500 kHz switching enables small 2.2 µH inductors and 22 µF ceramic output caps; RT/SYNC pin allows EMI alignment with data frame boundaries. |
| Automotive Body Control Module | Embedded Edge Gateway |
Use Scenario: Providing 5 V power to microcontroller, CAN transceivers, and LED drivers in body electronics modules subjected to cold-crank and load-dump conditions. IC Role / Device Role / Timing Role: Main system regulator handling wide-input automotive transients; EN pin used for ignition-synchronized startup/shutdown. Use Value: –40°C to +125°C rating meets AEC-Q100 Grade 1 requirements; 42 V absolute max rating withstands 36 V load-dump spikes. | Use Scenario: Powering ARM-based SoC, Wi-Fi/BLE radio, and USB peripherals in compact industrial IoT gateways powered from 12 V PoE injectors or wall adapters. IC Role / Device Role / Timing Role: Compact, thermally efficient 5 V source enabling fanless enclosure design; exposed PowerPAD facilitates conduction cooling. Use Value: HSOP-8 PowerPAD package delivers 60°C/W θJA with 1-in² copper; low quiescent current extends battery backup runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670MRX-5.0/NOPB | Lower 36 V max input voltage; identical 5 V output, 1 A rating, and HSOP-8 package. | Not suitable for 42 V industrial or automotive applications; limited to 24 V/36 V systems. | Select when input never exceeds 36 V and cost optimization is prioritized over voltage margin. |
| TPS54202DRCT | 2.5–17 V input range; 500 kHz fixed frequency; smaller 3 mm × 2 mm WSON package; no integrated bootstrap diode. | Requires external bootstrap diode and higher minimum input; unsuitable for 24 V+ inputs. | Choose for space-constrained 5 V/12 V systems where footprint reduction outweighs input voltage flexibility. |
Compared with LM22672MRX-5.0/NOPB, LM22670MRX-5.0/NOPB trades 6 V input headroom for lower cost in 24 V-only systems, while TPS54202DRCT offers smaller size at the expense of input range and added external component count-making LM22672MRX-5.0/NOPB optimal for rugged 42 V-capable designs needing minimal BOM and proven thermal performance.
Availability
LM22672MRX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power, and embedded systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LM22672MRX-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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The LM22672 product line delivers SIMPLE SWITCHER® buck regulators designed for ease-of-use, minimal external component count, and robust operation in harsh voltage environments-from factory automation to vehicle electronics.
FAQ
What is the maximum input voltage rating for LM22672MRX-5.0/NOPB?
The LM22672MRX-5.0/NOPB has an absolute maximum input voltage rating of 43 V, with recommended operating range from 4.5 V to 42 V. This allows reliable operation across 12 V, 24 V, and 36 V industrial and automotive supply rails-including transient spikes up to 42 V. Exceeding 43 V risks permanent damage per the Absolute Maximum Ratings table in the SNVS588M datasheet.
Does LM22672MRX-5.0/NOPB require external compensation components?
No, LM22672MRX-5.0/NOPB features fully internal Type III loop compensation optimized for its fixed 5.0 V output. Unlike adjustable versions, it needs no external resistors or capacitors for stability-reducing BOM count and eliminating tuning effort. Stability is verified across standard inductor/capacitor combinations per TI's WEBENCH® design tool and application notes.
How is thermal performance managed in the HSOP-8 PowerPAD package of LM22672MRX-5.0/NOPB?
LM22672MRX-5.0/NOPB uses an HSOP-8 package with exposed thermal pad (MR suffix), achieving 60°C/W junction-to-ambient thermal resistance when mounted on 1 in² of PCB copper. Effective thermal management requires soldering the exposed pad directly to a solid GND plane with ≥4 thermal vias; insufficient copper or missing vias degrade θJA to >100°C/W and risk thermal shutdown at full load.
Can LM22672MRX-5.0/NOPB synchronize to an external clock?
Yes, LM22672MRX-5.0/NOPB supports external clock synchronization via the RT/SYNC pin. When driven with a clean square wave (1.75 V threshold, <1 MHz), it locks to the rising edge and disables internal oscillator. Synchronization is latched at startup and reverts to 500 kHz if external clock is lost. Note: frequency adjustment (resistor mode) and sync mode are mutually exclusive.
What is the purpose of the SS pin on LM22672MRX-5.0/NOPB?
The SS (Soft-Start) pin on LM22672MRX-5.0/NOPB controls output voltage ramp-up time during startup. An internal 50 µA current source charges an external capacitor connected to SS, extending the default ~500 µs soft-start period. Using a 100 nF–1 µF capacitor prevents inrush current, avoids output overshoot, and enables controlled power sequencing with other rails in multi-supply systems.
LM22672MRX-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- 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):
- 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
LM22672MRX-5.0/NOPB FAQ
1.How can I place an order for LM22672MRX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22672MRX-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 LM22672MRX-5.0/NOPB reliable?
The price and inventory of LM22672MRX-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 LM22672MRX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22672MRX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22672MRX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22672MRX-5.0/NOPB?
LM22672MRX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22672MRX-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 LM22672MRX-5.0/NOPB?
For technical support, including LM22672MRX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22672MRX-5.0/NOPB requirements.
6.How does Aetrix verify that LM22672MRX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22672MRX-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 LM22672MRX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22672MRX-5.0/NOPB?
All LM22672MRX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22672MRX-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 LM22672MRX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22672MRX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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