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Texas Instruments LM22672QMR-5.0/NOPB
- Part No.:
- LM22672QMR-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22672QMR-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,192
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Product details
Overview
LM22672QMR-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 power conversion from 12 V or 24 V rails.
For engineers reviewing the LM22672QMR-5.0/NOPB datasheet, LM22672QMR-5.0/NOPB pinout, LM22672QMR-5.0/NOPB application, or LM22672QMR-5.0/NOPB equivalent, key selection considerations include input voltage range (4.5–42 V), thermal performance in HSOP PowerPAD package, soft-start programmability via SS pin, and synchronization capability through RT/SYNC.
Technical Context
The LM22672QMR-5.0/NOPB implements voltage-mode PWM control with input voltage feedforward for stable 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 bootstrap gate driver with internal diode, enabling high-side N-FET operation without external bootstrap diode. The device supports three oscillator modes: default 500 kHz internal clock, resistor-adjustable 200 kHz–1 MHz, or external synchronization - but not simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over –40°C to +125°C; eliminates need for external feedback divider. |
| Input Voltage Range | 4.5 V to 42 V; supports direct regulation from 12 V, 24 V, and 36 V industrial/bus rails. |
| Switching Frequency | 500 kHz typical (default); adjustable 200 kHz–1 MHz or synchronizable to external clock up to 1 MHz. |
| Max Output Current | 1 A continuous; limited by internal 200 mΩ N-channel MOSFET and thermal design in HSOP package. |
| Quiescent Current | 3.4 mA typical at VOUT = 5 V; enables efficient light-load operation in always-on systems. |
| Standby Current | 25 µA typical in shutdown (EN = 0 V); supports low-power system sequencing. |
| Enable Threshold | 1.6 V typical falling threshold with 0.6 V hysteresis; allows precise multi-rail power-up/down sequencing. |
| Thermal Shutdown | 150°C junction temperature; protects against sustained overload or inadequate PCB copper area. |
Pinout & Package
LM22672QMR-5.0/NOPB uses an 8-pin HSOP (PowerPAD) package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (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 N-FET; requires 10 nF ceramic capacitor between BOOT and SW. |
| EN | Enable control input | Logic-level enable with precision 1.6 V threshold and 0.6 V hysteresis; supports UVLO implementation via external resistor divider. |
| SW | Switch node output | Drives external inductor; swings from ~0 V to VIN; requires low-inductance layout to minimize EMI and ringing. |
| RT/SYNC | Oscillator mode control | Selects internal 500 kHz clock, resistor-adjusted frequency (200 kHz–1 MHz), or external synchronization (rising-edge triggered). |
| FB | Feedback input | Internally connected to 5.0 V reference; not accessible-fixed-output configuration eliminates external resistive divider. |
| GND | System ground | Power and signal return; must be tied to exposed thermal pad for thermal and electrical integrity. |
| VIN | Main input supply | Accepts 4.5–42 V; supplies internal LDO, gate driver, and control circuitry; requires local 10 µF ceramic input capacitor. |
| SS | Soft-start timing input | Sets startup ramp time via external capacitor (100 nF–1 µF); default internal soft-start is ~500 µs. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated boot-strap diode | Eliminates external bootstrap diode requirement, reducing BOM count and layout complexity. |
| Stable with ceramic output capacitors | Supports low-ESR ceramic capacitors (e.g., X5R/X7R) without external compensation or damping networks. |
| Adjustable soft-start | Programmable startup time via single external capacitor on SS pin, preventing inrush current and output overshoot. |
| Internal loop compensation | Optimized Type III compensation for fixed 5 V output; removes need for external compensation components. |
| WEBENCH® enabled | Fully supported in TI's WEBENCH Power Designer for schematic generation, efficiency simulation, thermal modeling, and BOM export. |
| AEC-Q100 Grade 1 qualified | Qualified for automotive applications (–40°C to +125°C junction); LM22672QMR-5.0/NOPB is the Q1 variant. |
Applications
| Industrial PLC Power | Automotive Body Control Module |
|---|---|
|
Use Scenario: Regulating 24 V vehicle battery to stable 5 V for microcontroller, CAN transceivers, and sensors. IC Role / Device Role / Timing Role: Primary 5 V point-of-load regulator with precision enable sequencing and thermal protection. Use Value: Delivers 1 A at 5 V with <1.5% output tolerance across –40°C to +125°C, meeting AEC-Q100 Grade 1 requirements. |
Use Scenario: Powering logic and interface circuits in industrial programmable logic controllers operating from 24 V DC bus. IC Role / Device Role / Timing Role: Fixed-output buck converter providing clean, sequenced 5 V rail for FPGA I/O banks and communication peripherals. Use Value: Enables compact, thermally robust design using HSOP PowerPAD package with 60°C/W RθJA under standard PCB layout. |
| Telecom Remote Radio Unit | Embedded Medical Diagnostic Interface |
|
Use Scenario: Converting 48 V intermediate bus to 5 V for digital signal processors and ADCs in remote radio head units. IC Role / Device Role / Timing Role: High-input-voltage buck regulator supporting 42 V max VIN with synchronized switching to avoid RF interference bands. Use Value: Allows RT/SYNC pin to lock switching frequency to system clock, reducing conducted EMI in sensitive RF environments. |
Use Scenario: Supplying isolated 5 V logic power in portable diagnostic devices powered from 12 V Li-ion battery packs. IC Role / Device Role / Timing Role: Low-quiescent-current (3.4 mA typ) buck regulator with soft-start to prevent sensor initialization faults during power-up. Use Value: Ensures controlled 5 V ramp with <500 µs default soft-start, avoiding false triggers in analog front-end circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22674QMR-5.0/NOPB | Same pinout and function, but rated for 45 V max VIN and includes improved current limit foldback behavior. | Better suited for transient-heavy 36 V+ industrial inputs where overvoltage spikes exceed 42 V. | Preferred when input transients exceed 42 V or enhanced overload protection is required. |
| TPS54302DDAR | 3.5–28 V input, 3 A output, 500 kHz fixed frequency, no RT/SYNC sync capability, smaller SOIC-8 package. | Limited to lower input voltages; lacks synchronization and wide-VIN capability of LM22672QMR-5.0/NOPB. | Appropriate only for ≤28 V systems requiring higher current and smaller footprint, not for 42 V or sync-critical designs. |
Compared with LM22672QMR-5.0/NOPB, LM22674QMR-5.0/NOPB extends input voltage margin and improves fault handling, while TPS54302DDAR trades VIN range and sync capability for higher current and smaller size - neither is pin-compatible nor drop-in.
Availability
LM22672QMR-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, automotive body electronics, and telecom power conversion requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for LM22672QMR-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 LM22672 product line delivers SIMPLE SWITCHER® buck regulators targeting cost-sensitive, space-constrained industrial and automotive applications requiring wide input range, integrated FETs, and minimal external components.
FAQ
What is the maximum input voltage rating for LM22672QMR-5.0/NOPB?
The LM22672QMR-5.0/NOPB has an absolute maximum input voltage of 43 V and a recommended operating range of 4.5 V to 42 V. Exceeding 42 V continuously may trigger overvoltage stress or reduce reliability; operation above 42 V is not guaranteed per datasheet specifications. The device is designed for robustness in 24 V and 36 V industrial and automotive systems where transients are clamped below 43 V.
Does LM22672QMR-5.0/NOPB require an external feedback resistor network?
No, LM22672QMR-5.0/NOPB does not require an external feedback resistor network. It is a fixed 5.0 V output variant with internal feedback connection to the 5.0 V reference, so the FB pin is not accessible for external adjustment. This simplifies design, reduces component count, and ensures ±1.5% output accuracy across temperature and load without calibration.
Can LM22672QMR-5.0/NOPB synchronize to an external clock?
Yes, LM22672QMR-5.0/NOPB can synchronize to an external clock via the RT/SYNC pin, provided the external frequency is between 500 kHz and 1 MHz and meets the VSYNC threshold (1.75 V) and amplitude requirements. Synchronization is latched at startup and reverts to 500 kHz internal clock if the external signal is lost during operation.
What thermal performance can be expected from LM22672QMR-5.0/NOPB in standard layout?
With 1 in² of 2-oz copper connected to the exposed PowerPAD, LM22672QMR-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 above ambient - well within the –40°C to +125°C operating range. Thermal derating begins above 100°C ambient without additional heatsinking.
Is LM22672QMR-5.0/NOPB pin-compatible with the non-Q1 version LM22672MR-5.0/NOPB?
Yes, LM22672QMR-5.0/NOPB is pin-compatible with LM22672MR-5.0/NOPB - both use identical 8-pin HSOP PowerPAD packaging and share identical pin functions, electrical characteristics, and layout requirements. The "Q" suffix denotes AEC-Q100 Grade 1 qualification and automotive-grade screening; all other functional and mechanical specs match.
LM22672QMR-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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM22672QMR-5.0/NOPB FAQ
1.How can I place an order for LM22672QMR-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22672QMR-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 LM22672QMR-5.0/NOPB reliable?
The price and inventory of LM22672QMR-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 LM22672QMR-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22672QMR-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22672QMR-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22672QMR-5.0/NOPB?
LM22672QMR-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22672QMR-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 LM22672QMR-5.0/NOPB?
For technical support, including LM22672QMR-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22672QMR-5.0/NOPB requirements.
6.How does Aetrix verify that LM22672QMR-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22672QMR-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 LM22672QMR-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22672QMR-5.0/NOPB?
All LM22672QMR-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22672QMR-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 LM22672QMR-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22672QMR-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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