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Texas Instruments LM22670QMRE-5.0/NOPB
- Part No.:
- LM22670QMRE-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22670QMRE-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:365
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Product details
Overview
LM22670QMRE-5.0/NOPB from Texas Instruments is a 42-V input, 3-A synchronous step-down DC/DC regulator in an HSOP-8 PowerPAD™ package, delivering a fixed 5.0 V output with ±1.5% feedback reference accuracy, 500 kHz default switching frequency, and integrated bootstrap diode. It operates across –40°C to +125°C junction temperature and supports industrial control, telecom power conversion, and embedded systems requiring stable 5-V rails from 12-V or 24-V inputs.
For engineers reviewing the LM22670QMRE-5.0/NOPB datasheet, LM22670QMRE-5.0/NOPB pinout, LM22670QMRE-5.0/NOPB application, or LM22670QMRE-5.0/NOPB equivalent, key selection considerations include its 4.5–42 V input range, internal voltage-mode compensation, thermal shutdown protection, soft-start timing (500 µs), and compatibility with low-ESR ceramic output capacitors.
Technical Context
The LM22670QMRE-5.0/NOPB implements a voltage-mode PWM controller with input voltage feedforward for loop gain stabilization, enabling robust transient response across wide VIN/VOUT ratios. Its internal Type III compensation is optimized for fixed 5-V output configurations and eliminates external compensation components.
It integrates a 120-mΩ N-channel MOSFET switch (PFM package), precision enable input with 1.6 V threshold and 0.6 V hysteresis, and RT/SYNC pin supporting 200 kHz–1 MHz adjustable frequency 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 regulation 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, simplifying layout and improving accuracy over temperature. |
| Max Output Current | 3 A - sustained load capability enabled by 120-mΩ internal high-side MOSFET and exposed thermal pad. |
| Switching Frequency | 500 kHz (default), adjustable 200 kHz–1 MHz - balances efficiency, EMI, and external component size; sync-capable for multi-rail coherence. |
| Quiescent Current | 3.4 mA (active), 25 µA (shutdown) - enables low-power standby modes in battery-backed or always-on systems. |
| Junction Temp Range | –40°C to +125°C - qualified for industrial and automotive under-hood environments without derating. |
| Soft-Start Time | 500 µs (fixed) - prevents inrush current and output overshoot during power-up without external timing components. |
Pinout & Package
LM22670QMRE-5.0/NOPB uses the HSOP-8 PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad connected to GND for enhanced thermal dissipation (RθJA = 60°C/W on 1-in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch Node | Drives external inductor; swings from ~0 V to VIN; requires low-inductance layout to minimize ringing and EMI. |
| 2 VIN | Input Supply | Primary power input (4.5–42 V); decoupling capacitor must be placed adjacent to this pin and GND. |
| 3 BOOT | Bootstrap Supply | Connects to SW via 10-nF ceramic capacitor; supplies gate drive for internal high-side MOSFET. |
| 4 GND | Power Ground | System ground return; connects internally to exposed thermal pad; must be solidly tied to PCB ground plane. |
| 5 RT/SYNC | Oscillator Control | Configures frequency mode: floating = 500 kHz, resistor-to-GND = adjustable, external clock = sync; latched at startup. |
| 6 FB | Feedback Input | Internally tied to 5.0 V reference; not used in -5.0 variant - pin left unconnected per datasheet. |
| 7 EN | Enable Control | Logic-level ON/OFF control; 1.6 V threshold with 0.6 V hysteresis; internal 6-µA pullup allows direct VIN connection via 470-kΩ resistor. |
| 8 NC | No Connect | Not electrically bonded; no internal connection - must remain unconnected and unpopulated on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Diode | Eliminates external bootstrap diode, reducing BOM count and layout complexity while ensuring reliable high-side gate drive. |
| Internally Compensated Loop | Removes need for external compensation network - simplifies design, improves consistency, and accelerates time-to-test. |
| Stable with Ceramic Capacitors | Supports low-ESR ceramic output caps (no electrolytic required), enabling smaller footprint, longer lifetime, and better ripple performance. |
| Precision Enable with UVLO | Enables controlled power sequencing and system-level undervoltage lockout using external resistor divider or direct VIN tie. |
| Thermal Shutdown & Current Limit | Protects against overload and overheating: thermal cutoff at 150°C and peak current limit of 3.4–5.3 A depending on temp. |
Applications
| Industrial Motor Drives | Telecom Line Cards |
|---|---|
|
Use Scenario: Powering FPGA I/O banks, microcontrollers, and interface ICs on 24-V-powered motor control boards. IC Role / Device Role / Timing Role: Primary 5-V point-of-load regulator converting 24-V bus to clean, regulated 5-V supply. Use Value: Delivers 3 A continuously at >90% efficiency with minimal thermal rise, enabling compact heatsink-free designs in enclosed enclosures. |
Use Scenario: Generating 5-V auxiliary rail for management ASICs and PHY transceivers on telecom line cards fed from –48-V or 24-V backplanes. IC Role / Device Role / Timing Role: Isolated secondary-side buck regulator providing stable 5-V bias independent of primary converter dynamics. Use Value: Wide 4.5–42 V input range accommodates both 24-V and rectified –48-V (via intermediate stage) sources without redesign. |
| Automotive Body Control Modules | Embedded Medical Devices |
|
Use Scenario: Supplying 5-V logic rails in BCMs exposed to cold-crank (4.5 V) and load-dump (42 V) conditions. IC Role / Device Role / Timing Role: Input-tolerant buck regulator maintaining 5-V output during automotive transients without external TVS or LDO pre-regulator. Use Value: Qualified to –40°C to +125°C and featuring built-in thermal shutdown ensures reliability across full vehicle operating envelope. |
Use Scenario: Providing isolated 5-V power to patient-monitoring sensors and low-power MCU subsystems in battery-operated devices. IC Role / Device Role / Timing Role: High-efficiency, low-quiescent-current buck converter extending battery life while meeting strict EMI limits. Use Value: 25 µA shutdown current and 500 µs soft-start reduce wake-up energy and prevent sensor initialization faults. |
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 | Same architecture but TO-263-7 package (10.16 mm × 9.85 mm); higher RθJA (22°C/W with 1-in² copper) and 100-mΩ MOSFET. | Better thermal performance at high ambient; suited for higher continuous loads or less aggressive airflow. | Select when board space permits larger package and thermal margin is prioritized over footprint. |
| TPS54340DDAR | 42-V, 3.5-A buck with adjustable frequency (100 kHz–2.5 MHz), no integrated bootstrap diode, and different pinout. | Requires external bootstrap diode and compensation; offers wider frequency tuning and higher current rating. | Choose when higher switching frequency or programmable soft-start is required, accepting added BOM and layout complexity. |
Compared with LM22670QMRE-5.0/NOPB, LM22671MRE-5.0/NOPB trades smaller footprint for superior thermal handling in high-power continuous operation, while TPS54340DDAR adds frequency flexibility and current headroom at the cost of integration and pin compatibility.
Availability
LM22670QMRE-5.0/NOPB is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, and automotive body control modules requiring stable component supply with long-term manufacturability and automotive-grade reliability.
Supply support for LM22670QMRE-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 power conversion ICs.
The LM22670 product line delivers SIMPLE SWITCHER® step-down regulators designed for ease-of-use in industrial, telecom, and automotive applications where wide input range, internal compensation, and thermal robustness are critical.
FAQ
What is the maximum input voltage rating for LM22670QMRE-5.0/NOPB?
The absolute maximum input voltage for LM22670QMRE-5.0/NOPB is 43 V, with recommended operating range from 4.5 V to 42 V. Operation beyond 42 V risks permanent damage, and the device incorporates internal undervoltage lockout (UVLO) that disables regulation below ~3.9 V to prevent unstable startup.
Does LM22670QMRE-5.0/NOPB require external compensation components?
No, LM22670QMRE-5.0/NOPB features fully internal Type III loop compensation optimized for fixed 5-V output. This eliminates external resistors and capacitors typically needed for stability tuning, reducing design risk and component count while maintaining robust performance across temperature and load.
Can LM22670QMRE-5.0/NOPB synchronize to an external clock signal?
Yes, LM22670QMRE-5.0/NOPB supports external synchronization via the RT/SYNC pin. When driven with a clean square wave between 1.75 V and 3.5 V at 50% duty cycle and frequency >500 kHz (up to 1 MHz), it locks to the rising edge and maintains phase coherence - useful for noise-sensitive multi-rail systems.
What is the purpose of the NC pin on LM22670QMRE-5.0/NOPB?
Pin 2 on LM22670QMRE-5.0/NOPB is designated NC (No Connect) and has no internal electrical connection. It must remain unconnected on the PCB and should not be routed or soldered. Its presence is mechanical - maintaining package symmetry and thermal pad alignment in the HSOP-8 PowerPAD™ footprint.
How does the soft-start function operate in LM22670QMRE-5.0/NOPB?
LM22670QMRE-5.0/NOPB implements a fixed 500 µs internal soft-start that ramps the output voltage linearly from 0 V to 5 V during power-up. This feature resets automatically upon shutdown or thermal fault, preventing inrush current, minimizing stress on input capacitors, and eliminating need for external soft-start circuitry.
LM22670QMRE-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:
- 3A
- 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
LM22670QMRE-5.0/NOPB FAQ
1.How can I place an order for LM22670QMRE-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670QMRE-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 LM22670QMRE-5.0/NOPB reliable?
The price and inventory of LM22670QMRE-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 LM22670QMRE-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22670QMRE-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670QMRE-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670QMRE-5.0/NOPB?
LM22670QMRE-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670QMRE-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 LM22670QMRE-5.0/NOPB?
For technical support, including LM22670QMRE-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670QMRE-5.0/NOPB requirements.
6.How does Aetrix verify that LM22670QMRE-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22670QMRE-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 LM22670QMRE-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22670QMRE-5.0/NOPB?
All LM22670QMRE-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22670QMRE-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 LM22670QMRE-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22670QMRE-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22670QMRE-5.0/NOPB Tags
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