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Texas Instruments LM22674MRE-5.0/NOPB
- Part No.:
- LM22674MRE-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22674MRE-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 500MA 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:4,855
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Product details
Overview
LM22674MRE-5.0/NOPB from Texas Instruments is a 42 V input, 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 boot-strap diode. It delivers high efficiency (>90%) in industrial power rails converting 12 V or 24 V inputs to stable 5 V for microcontrollers and interface ICs.
For engineers reviewing the LM22674MRE-5.0/NOPB datasheet, LM22674MRE-5.0/NOPB pinout, LM22674MRE-5.0/NOPB application, or LM22674MRE-5.0/NOPB equivalent, key selection criteria include its 4.5–42 V wide input range, internal 200 mΩ N-channel MOSFET, precision enable threshold (1.6 V typ), thermal shutdown at 150°C, and SO PowerPAD™ package for enhanced thermal performance.
Technical Context
The LM22674MRE-5.0/NOPB implements voltage-mode PWM control with input voltage feedforward to stabilize loop gain across input variations. Its internal Type III compensation is optimized for fixed 5 V output, eliminating external compensation components.
It integrates a floating high-side gate driver powered by the BOOT–SW bootstrap capacitor, requiring ≥10 nF ceramic capacitance and minimum 5 mA load for reliable recharging. The device enforces 100 ns minimum on-time and 200 ns minimum off-time to ensure current sensing integrity and bootstrap recharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct connection to 24 V industrial buses and automotive battery systems without pre-regulation. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback resistors; enables plug-and-play 5 V rail generation. |
| Max Output Current | 500 mA - sufficient for powering multiple low-power MCUs, sensors, and logic ICs from a single regulator. |
| Switching Frequency | 500 kHz - allows use of compact 3.3–10 µH inductors and reduces output ripple without compromising transient response. |
| MOSFET RDS(ON) | 200 mΩ - minimizes conduction loss at full load, enabling >90% peak efficiency at 12 VIN/5 VOUT. |
| Enable Threshold | 1.6 V (typ), 0.6 V hysteresis - supports precise power sequencing with resistor dividers from other rails or microcontroller GPIOs. |
| Quiescent Current | 3.4 mA (active), 25 µA (shutdown) - enables low-power standby modes in battery-backed or energy-conscious systems. |
| Junction Temp Range | –40°C to +125°C - qualified for extended industrial and automotive under-hood environments. |
Pinout & Package
LM22674MRE-5.0/NOPB uses an 8-pin HSOP package (4.89 mm × 3.90 mm) with exposed thermal pad (EP) that must be soldered to PCB ground for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply input | Connects to SW node via 10 nF ceramic capacitor; supplies gate drive voltage for internal high-side N-MOSFET. |
| EN | Enable control input | Logic-level input: <1.6 V disables regulator (25 µA IQ); >2.2 V enables; 0.6 V hysteresis prevents chatter during slow-rising signals. |
| SW | Switch node output | Drives external inductor; swings from ~0 V to VIN; requires low-inductance layout to minimize ringing and EMI. |
| FB | Feedback reference input | Internally tied to 5 V output; no external divider needed - simplifies layout and improves noise immunity vs adjustable versions. |
| GND | Power and signal ground | Common return for all circuits; must be connected to EP (exposed pad) for thermal and electrical integrity. |
| VIN | Main power input | Accepts 4.5–42 V; requires local 10 µF ceramic input capacitor placed near pin to suppress high-frequency transients. |
| NC (Pins 2,3) | No connect | Thermally conductive but electrically isolated; may be used as thermal relief or left unconnected. |
| EP (Exposed Pad) | Thermal & ground plane | Must be soldered to large PCB copper area tied to GND; critical for achieving 60°C/W θJA and sustaining 500 mA continuous load. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external Schottky diode in bootstrap path - reduces BOM count and layout complexity while ensuring reliable gate drive. |
| Internal soft-start | 500 µs fixed ramp time - prevents inrush current and output overshoot during power-up without external timing components. |
| Stable with ceramic capacitors | Supports low-ESR ceramic output caps (e.g., 22 µF X5R) - avoids bulky electrolytics and improves reliability over temperature. |
| Thermal shutdown & current limit | 150°C trip point with 15°C hysteresis and 0.7 A peak current limit - protects against sustained overload and PCB overheating without external circuitry. |
| WEBENCH® enabled | Full parametric design support in TI's online tool - auto-selects inductors, capacitors, diodes, and generates thermal/simulation reports for LM22674MRE-5.0/NOPB designs. |
| SO PowerPAD™ package | 8-pin thermally enhanced HSOP - delivers 2× better thermal resistance vs standard SOIC, enabling 500 mA operation in compact 125°C ambient environments. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering isolated digital I/O drivers, ADC references, and CAN transceivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary 5 V buck regulator supplying clean, regulated power to mixed-signal subsystems with strict EMI and thermal constraints. Use Value: Wide 4.5–42 V input accommodates fluctuating 24 V industrial bus voltages; SO PowerPAD enables convection-cooled operation in sealed enclosures. | Use Scenario: Generating 5 V for microcontroller core logic, LIN transceivers, and sensor interfaces in door modules and seat control units. IC Role / Device Role / Timing Role: Secondary DC/DC converter downstream of main 12 V battery rail, providing robust, sequenced 5 V supply with UVLO and thermal protection. Use Value: Precision enable pin allows synchronization with ignition-on event; –40°C to +125°C rating meets AEC-Q100 Grade 1 requirements. |
| Telecom Remote Radio Unit | Medical Point-of-Care Monitor |
Use Scenario: Converting 48 V backplane voltage to 5 V for FPGA configuration, Ethernet PHYs, and memory in outdoor small-cell base stations. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator delivering low-noise 5 V to sensitive RF and data acquisition circuitry. Use Value: 500 kHz switching enables small magnetics; internal compensation ensures stability with ceramic output caps-critical for EMI-constrained telecom sites. | Use Scenario: Providing isolated 5 V power to patient-connected analog front-ends, display controllers, and USB peripherals in portable diagnostic devices. IC Role / Device Role / Timing Role: Safety-critical power stage where low quiescent current (25 µA shutdown) extends battery life and thermal shutdown prevents fault propagation. Use Value: Fixed 5 V output eliminates resistor tolerance errors; ±1.5% reference accuracy ensures consistent ADC reference and sensor biasing. |
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, 150 kHz switching frequency, higher peak efficiency at light loads, larger minimum inductor value required. | Better suited for ultra-low-noise, low-EMI applications where size is less constrained and lower switching losses at partial load are prioritized. | Select when EMI filtering simplicity and light-load efficiency outweigh need for compact magnetics. |
| TPS54302DDCR | 3.5–28 V input, 3 A output, 500 kHz, integrated high/low-side FETs, no BOOT pin required. | Higher current capability and wider control flexibility (adjustable soft-start, current limit), but not rated for >28 V input or automotive temp range. | Select when system requires >500 mA or needs programmable features; avoid if 42 V input or AEC-Q100 compliance is mandatory. |
Compared with LM22670MRE-5.0/NOPB, LM22674MRE-5.0/NOPB offers faster transient response and smaller passive components due to 500 kHz operation; compared with TPS54302DDCR, it supports higher input voltage and extended temperature range but lacks current-sense monitoring and adjustable features.
Availability
LM22674MRE-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, automotive body electronics, and telecom infrastructure requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM22674MRE-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 LM22674 product line delivers SIMPLE SWITCHER® step-down regulators targeting cost-sensitive, space-constrained applications needing minimal external components and fast time-to-market through WEBENCH® integration.
FAQ
What is the maximum input voltage rating for LM22674MRE-5.0/NOPB?
The absolute maximum input voltage for LM22674MRE-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 violating SOA limits, especially under high ambient conditions or heavy load. Always observe derating curves in the datasheet's Thermal Information section when operating near 42 V.
Does LM22674MRE-5.0/NOPB require an external feedback resistor network?
No, LM22674MRE-5.0/NOPB does not require external feedback resistors. It integrates an internal voltage divider optimized for 5.0 V output, so the FB pin is directly connected to the output. This eliminates resistor tolerance errors and layout sensitivity, improving output accuracy and noise immunity compared to adjustable variants like LM22674MRE-ADJ.
Can LM22674MRE-5.0/NOPB operate with only ceramic capacitors on input and output?
Yes, LM22674MRE-5.0/NOPB is explicitly designed to be stable with low-ESR ceramic capacitors on both input and output. A typical design uses a 10 µF X5R ceramic input cap near VIN and a 22 µF X5R ceramic output cap near VOUT. No electrolytic or tantalum capacitors are required, enhancing reliability and lifetime in high-temperature or high-vibration environments.
What thermal performance can be expected from LM22674MRE-5.0/NOPB in a standard 2-layer PCB layout?
In a standard 2-layer PCB with 1-in² copper pour connected to the exposed pad (EP), LM22674MRE-5.0/NOPB achieves approximately 60°C/W junction-to-ambient thermal resistance (θJA). At 500 mA load and 12 V input, this yields ~30°C junction rise above ambient - well within the 125°C max operating junction temperature. For higher ambient or denser layouts, adding internal ground planes or thermal vias improves performance.
Is LM22674MRE-5.0/NOPB qualified for automotive applications?
LM22674MRE-5.0/NOPB is not automotive-qualified; it is the commercial-grade version. For automotive use, select LM22674QMR-5.0/NOPB (AEC-Q100 Grade 1, –40°C to +125°C). The Q1 variant shares identical electrical specs and pinout but undergoes additional stress testing and lot traceability per automotive standards - critical for body control, lighting, and infotainment systems.
LM22674MRE-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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM22674MRE-5.0/NOPB FAQ
1.How can I place an order for LM22674MRE-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22674MRE-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 LM22674MRE-5.0/NOPB reliable?
The price and inventory of LM22674MRE-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 LM22674MRE-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22674MRE-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22674MRE-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22674MRE-5.0/NOPB?
LM22674MRE-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22674MRE-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 LM22674MRE-5.0/NOPB?
For technical support, including LM22674MRE-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22674MRE-5.0/NOPB requirements.
6.How does Aetrix verify that LM22674MRE-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22674MRE-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 LM22674MRE-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22674MRE-5.0/NOPB?
All LM22674MRE-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22674MRE-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 LM22674MRE-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22674MRE-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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