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Texas Instruments LM22674QMRE-5.0/NOPB
- Part No.:
- LM22674QMRE-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22674QMRE-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 500MA 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:526
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Product details
Overview
LM22674QMRE-5.0/NOPB from Texas Instruments is a 42 V, 500 mA 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 rails, and embedded systems requiring stable 5 V conversion from 4.5–42 V inputs.
For engineers reviewing the LM22674QMRE-5.0/NOPB datasheet, LM22674QMRE-5.0/NOPB pinout, LM22674QMRE-5.0/NOPB application, or LM22674QMRE-5.0/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance in HSOP-8 PowerPAD package, enable threshold hysteresis (0.6 V), soft-start timing (500 µs), and compatibility with low-ESR ceramic output capacitors without external compensation.
Technical Context
The LM22674QMRE-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 need for external compensation components.
It integrates a bootstrap diode, precision enable input (1.6 V turn-on threshold, 0.6 V hysteresis), thermal shutdown (150°C trip), and cycle-by-cycle current limiting (0.56–0.84 A). Minimum on-time (100 ns) and off-time (200 ns) constrain duty cycle limits for high-ratio buck conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% (4.925–5.075 V) - ensures stable logic supply without external feedback divider. |
| Input Voltage Range | 4.5 V to 42 V - supports 12 V/24 V industrial rails and automotive battery transients. |
| Switching Frequency | 500 kHz (±20%) - enables compact 3.9 mm × 4.89 mm layout with small inductors and ceramics. |
| Max Output Current | 500 mA - sufficient for microcontrollers, sensors, and interface ICs in space-constrained designs. |
| RDS(ON) | 200 mΩ (typ) - reduces conduction loss and improves efficiency (>90% at mid-load). |
| Quiescent Current | 3.4 mA (typ) - minimizes no-load power draw in always-on subsystems. |
| Standby Current | 25 µA (typ) - enables ultra-low-power shutdown for battery-backed applications. |
| Junction Temp Range | –40°C to +125°C - qualified for under-hood automotive and industrial environments. |
Pinout & Package
LM22674QMRE-5.0/NOPB uses an 8-pin HSOP package with exposed thermal pad (4.89 mm × 3.90 mm), where the EP must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply input | Connects to SW via 10 nF ceramic capacitor to generate gate drive voltage for internal high-side MOSFET. |
| EN | Enable control input | Logic-level input with 1.6 V turn-on threshold and 0.6 V hysteresis; pulls up internally at 6 µA. |
| SW | Power switch node | Drives external inductor; swings from GND to VIN; requires Schottky catch diode or synchronous rectifier. |
| FB | Feedback reference input | Internally tied to 5 V output; no external resistor divider required - simplifies BOM and layout. |
| GND | System ground reference | Common return for power and control circuits; connects directly to exposed pad for thermal path. |
| VIN | Main power input | Accepts 4.5–42 V DC; requires local 10 µF ceramic input capacitor near pin for stability. |
| NC | No-connect terminal | Pins 2 and 3 are electrically isolated; serve only as thermal conductors - must not be routed. |
| EP | Exposed thermal pad | Must be soldered to solid GND copper pour; critical for thermal resistance (RθJA = 60°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated boot-strap diode | Eliminates external diode requirement, reducing component count and board area in HSOP-8 footprint. |
| Internal soft-start (500 µs) | Prevents inrush current and output overshoot during power-up without external timing capacitor. |
| Stable with ceramic capacitors | Supports low-ESR MLCCs (no tantalum or electrolytic needed), improving reliability and temperature stability. |
| WEBENCH®-enabled design | TI's online tool provides validated bill-of-materials, thermal simulation, and layout guidance for rapid prototyping. |
| AEC-Q100 Grade 1 option | LM22674-Q1 variant available for automotive applications; this LM22674QMRE-5.0/NOPB is industrial-grade. |
| Precision enable with UVLO | EN pin doubles as programmable undervoltage lockout when used with resistor divider - prevents brownout operation. |
Applications
| Industrial PLC I/O Module | Telecom Line Card Power |
|---|---|
Use Scenario: Providing isolated 5 V rail for digital I/O drivers and fieldbus transceivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary buck regulator converting 24 V bus to clean 5 V logic supply with tight load regulation (<±1%) across 10–500 mA. Use Value: Internal compensation and ceramic-capacitor stability eliminate tuning effort; 125°C rating enables operation in sealed enclosures without forced air. | Use Scenario: Generating 5 V auxiliary power for FPGA configuration, PHY interfaces, and management MCU on 48 V telecom backplanes. IC Role / Device Role / Timing Role: Secondary point-of-load regulator stepping down -48 V (via intermediate 12 V) to 5 V with fast transient response (500 kHz switching). Use Value: 42 V max input withstands surge events on intermediate rails; soft-start prevents reset glitches during hot-swap insertion. |
| Embedded Medical Sensor Hub | Automotive Body Control Module (BCM) |
Use Scenario: Powering low-noise analog front-ends, ADCs, and BLE radios in portable diagnostic devices with Li-ion or 12 V adapter input. IC Role / Device Role / Timing Role: Efficient 5 V source delivering <500 mA with <10 mV ripple, leveraging integrated MOSFET and low quiescent current. Use Value: 25 µA standby current extends battery life in sleep mode; ±1.5% output accuracy ensures consistent sensor biasing. | Use Scenario: Supplying 5 V to microcontroller peripherals (CAN transceivers, LIN drivers, EEPROM) in vehicle body electronics. IC Role / Device Role / Timing Role: Robust buck converter handling cold-crank (4.5 V) and load-dump (42 V) conditions per ISO 7637-2. Use Value: Thermal shutdown and current limiting protect against shorted loads; HSOP PowerPAD enables direct mounting to metal chassis for EMC reduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670MRE-5.0/NOPB | Same pinout, 42 V input, but 300 mA output current and 600 kHz switching frequency. | Lower current capability suits low-power MCU cores; reduced thermal mass may limit sustained 500 mA operation. | Select when system load stays below 300 mA and higher frequency allows smaller magnetics. |
| TPS54302DDCR | 36 V max input, 3 A output, 2.2 MHz switching, integrated high/low-side FETs; different pinout and package (SOT-23-6). | Higher current and frequency support denser designs but require full re-layout and new compensation. | Choose for >500 mA loads or space-constrained boards where 2.2 MHz enables sub-2 mm inductors. |
Compared with LM22674QMRE-5.0/NOPB, LM22670MRE-5.0/NOPB offers lower cost and size for light loads but sacrifices headroom for peak currents, while TPS54302DDCR delivers higher performance at the expense of pinout incompatibility and increased design validation effort.
Availability
LM22674QMRE-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power distribution, and embedded medical systems requiring stable component supply across extended temperature and long production lifecycles.
Supply support for LM22674QMRE-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 over 90 years of innovation in industrial, automotive, and communications markets.
The LM22674 product line delivers SIMPLE SWITCHER® buck regulators targeting high-voltage, medium-current DC/DC conversion where ease-of-use, thermal robustness, and minimal external components are critical - especially in harsh-environment applications.
FAQ
What is the maximum input voltage rating for LM22674QMRE-5.0/NOPB?
The absolute maximum input voltage for LM22674QMRE-5.0/NOPB is 43 V, but the recommended operating range is 4.5 V to 42 V. Operation above 42 V risks exceeding safe junction temperature or triggering thermal shutdown, especially at high ambient temperatures or without adequate PCB copper for heat dissipation via the exposed pad.
Does LM22674QMRE-5.0/NOPB require an external feedback resistor divider?
No, LM22674QMRE-5.0/NOPB does not require an external feedback resistor divider because it features a factory-trimmed internal reference and fixed 5.0 V output circuitry. The FB pin is internally connected to the regulated output, unlike the adjustable LM22674-ADJ variant which requires external resistors.
Can LM22674QMRE-5.0/NOPB operate with ceramic output capacitors only?
Yes, LM22674QMRE-5.0/NOPB is explicitly designed to be stable with low-ESR ceramic capacitors - no electrolytic or tantalum capacitors are required. TI's datasheet confirms stability with 22 µF X5R/X7R MLCCs and specifies minimum capacitance and ESR ranges compatible with its internal Type III compensation.
What is the purpose of the exposed thermal pad (EP) on LM22674QMRE-5.0/NOPB?
The exposed thermal pad (EP) on LM22674QMRE-5.0/NOPB must be soldered to a PCB ground plane to provide both thermal conduction (reducing RθJA to 60°C/W) and electrical grounding. Leaving it unconnected degrades thermal performance by >30°C and may cause premature thermal shutdown under 500 mA load at elevated ambient temperatures.
How does the enable (EN) pin function on LM22674QMRE-5.0/NOPB?
The EN pin on LM22674QMRE-5.0/NOPB controls startup and shutdown with a 1.6 V typical turn-on threshold and 0.6 V hysteresis. It features an internal 6 µA pull-up, allowing direct connection to VIN for always-on operation or use with a resistor divider for programmable undervoltage lockout - critical for battery-powered systems.
LM22674QMRE-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:
- 500mA
- 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
LM22674QMRE-5.0/NOPB FAQ
1.How can I place an order for LM22674QMRE-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22674QMRE-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 LM22674QMRE-5.0/NOPB reliable?
The price and inventory of LM22674QMRE-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 LM22674QMRE-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22674QMRE-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22674QMRE-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22674QMRE-5.0/NOPB?
LM22674QMRE-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22674QMRE-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 LM22674QMRE-5.0/NOPB?
For technical support, including LM22674QMRE-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22674QMRE-5.0/NOPB requirements.
6.How does Aetrix verify that LM22674QMRE-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22674QMRE-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 LM22674QMRE-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22674QMRE-5.0/NOPB?
All LM22674QMRE-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22674QMRE-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 LM22674QMRE-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22674QMRE-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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