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Texas Instruments LM22672MRE-5.0/NOPB
- Part No.:
- LM22672MRE-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22672MRE-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,171
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Product details
Overview
LM22672MRE-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 control, telecom, and embedded power conversion from 12 V or 24 V rails.
For engineers reviewing the LM22672MRE-5.0/NOPB datasheet, LM22672MRE-5.0/NOPB pinout, LM22672MRE-5.0/NOPB application, or LM22672MRE-5.0/NOPB equivalent, key selection criteria include its internally compensated voltage-mode control, stable operation with low-ESR ceramic capacitors, adjustable soft-start via external capacitor, precision enable threshold (1.6 V typ), and thermal shutdown protection.
Technical Context
The LM22672MRE-5.0/NOPB implements a voltage-mode PWM controller 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 fixed 5 V output stability with standard inductor–capacitor combinations.
It integrates a bootstrap gate driver with internal diode, requiring only an external 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 24 V, 12 V, and 5 V inputs. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider, simplifying layout and improving accuracy over temperature. |
| Switching Frequency | 500 kHz (default), adjustable 200 kHz–1 MHz - enables compact magnetics and EMI-aware frequency placement. |
| Max Output Current | 1 A continuous - sufficient for powering microcontrollers, FPGAs, and interface ICs in space-constrained designs. |
| MOSFET RDS(on) | 200 mΩ (typ) - reduces conduction loss and improves efficiency (>90% typical at mid-load). |
| Quiescent Current | 3.4 mA (typ) - balances light-load efficiency and fast transient response. |
| Enable Threshold | 1.6 V (typ), 0.6 V hysteresis - allows precise power sequencing using simple resistor dividers from upstream rails. |
| Junction Temp Range | –40°C to +125°C - qualified for harsh environments including industrial motor drives and telecom base stations. |
Pinout & Package
LM22672MRE-5.0/NOPB uses the HSOP-8 (MR) package with exposed thermal pad (EP), 4.89 mm × 3.90 mm body size. The EP must be soldered to a PCB ground plane for thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply input | Provides gate drive voltage for internal high-side MOSFET; requires 10 nF ceramic cap to SW. |
| EN | Enable control input | Logic-level on/off control with 1.6 V threshold and 0.6 V hysteresis; internal 6 µA pullup. |
| SW | Switch node output | Drives external inductor; swings from ~0 V to VIN; connects to BOOT capacitor and external diode/FET. |
| RT/SYNC | Oscillator mode control | Selects internal 500 kHz, resistor-adjusted, or external synchronized mode; latched at startup. |
| 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, switch node, and thermal pad; must connect to EP. |
| VIN | Main power input | Accepts 4.5–42 V; supplies internal bias and high-side driver; requires local 10 µF ceramic decoupling. |
| SS | Soft-start timing input | Controls ramp-up time via external capacitor; default internal soft-start is ~500 µs. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated voltage-mode control | Eliminates need for external compensation network, reducing BOM count and design iteration time. |
| Stable with low-ESR ceramic capacitors | Enables use of compact, high-reliability MLCCs instead of bulkier electrolytics or tantalums. |
| Integrated bootstrap diode | Removes requirement for external bootstrap diode, simplifying layout and improving reliability. |
| Adjustable soft-start | Prevents inrush current and output overshoot via single external capacitor (100 nF–1 µF). |
| Precision enable with UVLO | Supports robust power sequencing and battery discharge protection via programmable turn-on/turn-off thresholds. |
| Thermal shutdown & current limiting | Protects against sustained overload or ambient overheating without external circuitry. |
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 FPGA configuration, MCU core, and level-shifting buffers. Use Value: Fixed 5.0 V output ensures consistent logic levels; 42 V input tolerance accommodates 24 V rail transients up to ±33%. | Use Scenario: Generating 5 V for Ethernet PHYs, SerDes, and management processors on telecom line cards fed from –48 V DC via intermediate 12 V bus. IC Role / Device Role / Timing Role: Secondary-stage point-of-load regulator delivering clean, low-noise 5 V to high-speed communication ICs. Use Value: 500 kHz switching enables small 2.2 µH inductors and 10 µF output capacitance, minimizing board area. |
| Automotive Body Control Unit | Embedded Edge Gateway |
Use Scenario: Providing regulated 5 V for microcontroller peripherals, CAN transceivers, and LED drivers in non-safety-critical vehicle modules. IC Role / Device Role / Timing Role: Main system power regulator handling cold-crank (4.5 V) and load-dump (42 V) conditions per ISO 7637-2. Use Value: –40°C to +125°C operation and AEC-Q100 Grade 1 qualification (via LM22672-Q1 variant) ensure reliability in under-hood environments. | Use Scenario: Powering ARM-based SoCs, Wi-Fi/BLE modules, and real-time clocks in smart building edge devices powered from PoE or 12 V wall adapters. IC Role / Device Role / Timing Role: Single-chip 5 V supply replacing discrete buck controllers and external MOSFETs. Use Value: Integrated 200 mΩ MOSFET and internal compensation reduce component count by ≥4 vs controller+MOSFET solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22671MRE-5.0/NOPB | Lower 36 V max input, same 1 A rating, identical pinout and features except reduced voltage rating. | Suitable where input never exceeds 36 V; not rated for 42 V transients or 24 V load-dump events. | Select when cost sensitivity outweighs need for 42 V margin; verify transient immunity in final design. |
| TPS54202DDCR | 36 V max input, 2 A output, 500 kHz fixed frequency, but requires external compensation and MOSFETs. | Offers higher current and adjustable output, but increases BOM count and design complexity. | Choose when >1 A load or adjustable VOUT is required; avoid if fixed 5 V and minimal footprint are priorities. |
Compared with LM22671MRE-5.0/NOPB, the LM22672MRE-5.0/NOPB provides essential 42 V tolerance for industrial 24 V systems with load-dump immunity; versus TPS54202DDCR, it delivers lower system-level cost and faster time-to-market via full integration and no compensation design effort.
Availability
LM22672MRE-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power, and embedded edge gateway designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LM22672MRE-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, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The LM22672 product line delivers SIMPLE SWITCHER® integrated buck regulators targeting space-constrained, high-reliability power conversion in harsh environments where ease of design-in and minimal external components are critical.
FAQ
What is the maximum input voltage rating for LM22672MRE-5.0/NOPB?
The LM22672MRE-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 42 V upper limit ensures reliable operation during automotive load-dump events and industrial 24 V rail transients. Exceeding 42 V continuously may trigger thermal shutdown or degrade long-term reliability, even if below the 43 V absolute maximum.
Does LM22672MRE-5.0/NOPB require an external feedback resistor divider?
No, the LM22672MRE-5.0/NOPB does not require an external feedback resistor divider because it is the fixed 5.0 V output variant. Its internal feedback node is permanently connected to a precision 5.0 V reference with ±1.5% accuracy over temperature. Only the adjustable versions (e.g., LM22672MRE-ADJ) require external resistors to set VOUT.
Can LM22672MRE-5.0/NOPB synchronize to an external clock?
Yes, LM22672MRE-5.0/NOPB supports external clock synchronization via the RT/SYNC pin. When an external square wave (1.75 V threshold, <1 MHz) is applied during startup, the device latches into sync mode and locks to the rising edge. However, frequency adjustment via resistor and synchronization cannot be used simultaneously - the mode is determined at power-up based on RT/SYNC pin voltage.
What thermal pad connection is required for LM22672MRE-5.0/NOPB?
The exposed thermal pad (EP) on the LM22672MRE-5.0/NOPB HSOP-8 package must be soldered directly to a solid PCB copper pour connected to GND. TI specifies 1 square inch of copper for optimal thermal performance (RθJA = 60°C/W). Failure to connect the EP results in excessive junction temperature rise, potential thermal shutdown, and reduced reliability under 1 A load.
Is LM22672MRE-5.0/NOPB pin-compatible with LM22672MRE-ADJ?
Yes, LM22672MRE-5.0/NOPB is fully pin-compatible with LM22672MRE-ADJ and all other variants in the LM22672 family. Both use the identical HSOP-8 (MR) package with matching pinout, footprint, and thermal pad layout. The only functional difference is internal feedback routing - fixed 5 V vs. adjustable - allowing direct substitution where output voltage requirements align.
LM22672MRE-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
LM22672MRE-5.0/NOPB FAQ
1.How can I place an order for LM22672MRE-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22672MRE-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 LM22672MRE-5.0/NOPB reliable?
The price and inventory of LM22672MRE-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 LM22672MRE-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22672MRE-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22672MRE-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22672MRE-5.0/NOPB?
LM22672MRE-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22672MRE-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 LM22672MRE-5.0/NOPB?
For technical support, including LM22672MRE-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22672MRE-5.0/NOPB requirements.
6.How does Aetrix verify that LM22672MRE-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22672MRE-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 LM22672MRE-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22672MRE-5.0/NOPB?
All LM22672MRE-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22672MRE-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 LM22672MRE-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22672MRE-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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