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Texas Instruments LM22670QMRX-5.0/NOPB
- Part No.:
- LM22670QMRX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22670QMRX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,562
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Product details
Overview
LM22670QMRX-5.0/NOPB from Texas Instruments is a 42-V, 3-A synchronous step-down DC/DC regulator in HSOP-8 PowerPAD™ package, featuring fixed 5.0 V output, 500 kHz switching frequency, ±1.5% feedback reference accuracy, and integrated bootstrap diode. It delivers high efficiency (>90%) in industrial power rails converting 12–24 V inputs to stable 5 V for microcontroller cores and peripheral logic.
For engineers reviewing the LM22670QMRX-5.0/NOPB datasheet, LM22670QMRX-5.0/NOPB pinout, LM22670QMRX-5.0/NOPB application, or LM22670QMRX-5.0/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance with exposed pad (RθJA = 60°C/W), precision enable threshold (1.6 V typ), and internal voltage-mode compensation eliminating external loop components.
Technical Context
The LM22670QMRX-5.0/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain across wide VIN variations. Its internal Type III compensation network is optimized for fixed 5 V output and stable operation with low-ESR ceramic capacitors.
It integrates a 120 mΩ N-channel MOSFET switch, bootstrap gate driver with dedicated BOOT pin, and precision enable with 0.6 V hysteresis. The device supports frequency adjustment (200–1000 kHz) or synchronization via RT/SYNC pin, while maintaining fixed 5 V regulation without external feedback resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over –40°C to +125°C junction temperature |
| Input Voltage Range | 4.5 V to 42 V - supports direct connection to 24 V industrial buses and automotive battery rails |
| Max Output Current | 3 A continuous - enabled by 120 mΩ internal high-side MOSFET and thermal pad dissipation |
| Switching Frequency | 500 kHz default - enables compact 2.2 µH inductors and 22 µF ceramic output capacitors |
| Quiescent Current | 3.4 mA typical at full load - balances light-load efficiency and transient response |
| Enable Threshold | 1.6 V typical falling edge - allows precise sequencing with resistor dividers from upstream supplies |
| Thermal Shutdown | 150°C junction - protects against sustained overload or inadequate PCB copper area |
Pinout & Package
LM22670QMRX-5.0/NOPB uses the HSOP-8 PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground plane for enhanced thermal performance (RθJA = 60°C/W with 1 in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Drives external inductor; swings from GND to VIN; requires low-inductance layout to minimize EMI |
| 2 VIN | Main input supply | Accepts 4.5–42 V; decoupling capacitor must be placed adjacent to this pin |
| 3 BOOT | Bootstrap supply | Connects to SW via 10 nF ceramic capacitor to generate gate drive voltage for internal high-side MOSFET |
| 4 GND | Power and signal ground | Common return path; connects to exposed pad for thermal and electrical integrity |
| 5 RT/SYNC | Oscillator control | Floating = 500 kHz; resistor-to-GND = adjustable frequency (200–1000 kHz); external clock = synchronization |
| 6 FB | Feedback input | Internally tied to 5 V reference; no external resistors required for fixed-output configuration |
| 7 EN | Enable control | Logic-level input; 1.6 V threshold enables startup; 25 µA shutdown current minimizes system standby loss |
| 8 NC | No connect | Not electrically bonded; may be used as thermal relief or left unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode, reducing BOM count and PCB footprint while ensuring reliable gate drive during startup |
| Internal loop compensation | Enables stable 5 V regulation with no external compensation components - reduces design cycle time and layout sensitivity |
| Stable with ceramic capacitors | Supports low-ESR MLCCs (≥22 µF) on output - avoids electrolytic capacitors and improves lifetime/reliability |
| Adjustable soft-start | Fixed 500 µs ramp time - prevents inrush current and output overshoot during power-up without external timing components |
| Precision enable with UVLO | Combines 1.6 V enable threshold and 4.3 V input UVLO - ensures clean power sequencing and prevents brownout operation |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Converting 24 V vehicle battery or factory bus to clean 5 V for digital I/O drivers and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5 V to microcontroller peripherals and level-shifting circuitry. Use Value: Withstands 42 V transients per ISO 7637-2; 125°C max junction rating supports under-hood placement; 3 A headroom accommodates multiple CAN/LIN transceivers. |
Use Scenario: Powering MCU, EEPROM, and LIN transceivers in door modules or lighting controllers. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter providing stable 5 V rail independent of battery voltage sag during cranking. Use Value: AEC-Q100 Grade 1 qualification (–40°C to +125°C); 25 µA shutdown current extends battery life in sleep mode; integrated soft-start prevents reset glitches. |
| Telecom Remote Radio Unit | Embedded Medical Diagnostic Interface |
|
Use Scenario: Generating 5 V from 48 V telecom rectifier output for FPGA configuration and ADC reference supplies. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator enabling single-rail architecture in space-constrained RRUs. Use Value: 42 V absolute max input withstands 48 V surge events; 500 kHz switching allows small magnetics; thermal pad ensures reliability in sealed enclosures. |
Use Scenario: Providing isolated 5 V logic supply for patient-monitoring front-end sensors and USB interface ICs. IC Role / Device Role / Timing Role: Safety-critical auxiliary power stage delivering low-noise 5 V to analog signal chains and communication peripherals. Use Value: ±1.5% output accuracy ensures consistent ADC reference; internal compensation eliminates tuning risk; 125°C operation supports fanless enclosure designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22671QMRX-5.0/NOPB | Same pinout and features but rated for 45 V max input (vs. 42 V); identical 3 A capability and 5 V output | Preferred for systems requiring margin above 42 V transients (e.g., 48 V telecom with >5 V surges) | Select when higher input voltage margin is needed without changing layout or firmware |
| TPS54340DDAR | 42 V input, 3.5 A, adjustable output only; requires external feedback resistors; no integrated bootstrap diode | Suitable where variable output or tighter load regulation (<±1%) is required, but adds BOM and layout complexity | Choose if design needs programmable output or lower quiescent current (4.5 µA shutdown), accepting added component count |
Compared with LM22670QMRX-5.0/NOPB, LM22671QMRX-5.0/NOPB offers extended input voltage margin while maintaining drop-in compatibility, whereas TPS54340DDAR trades fixed-output simplicity for output flexibility and slightly higher current capability at the cost of external components and no integrated bootstrap diode.
Availability
LM22670QMRX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, automotive body electronics, and telecom infrastructure requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM22670QMRX-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, serving industrial, automotive, and communications markets.
The LM22670 product line delivers SIMPLE SWITCHER® buck regulators targeting high-reliability, easy-to-design power conversion for harsh-environment applications - emphasizing integration, thermal robustness, and qualification for automotive and industrial use.
FAQ
What is the maximum input voltage rating for LM22670QMRX-5.0/NOPB?
The LM22670QMRX-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 allows safe operation across 24 V industrial buses and automotive 12 V/24 V systems including load dump transients defined in ISO 7637-2. Exceeding 42 V continuously risks degradation, though brief transients up to 43 V are tolerated per datasheet limits.
Does LM22670QMRX-5.0/NOPB require external feedback resistors to set its 5 V output?
No, LM22670QMRX-5.0/NOPB does not require external feedback resistors. It is a fixed-output variant with internal resistor divider tied to the FB pin, delivering precisely 5.0 V ±1.5% over temperature and line. The FB pin is internally connected to the 5 V reference, eliminating external components and simplifying layout versus adjustable versions like LM22670-ADJ.
How is thermal performance managed in the HSOP-8 PowerPAD™ package of LM22670QMRX-5.0/NOPB?
LM22670QMRX-5.0/NOPB uses an exposed thermal pad in the HSOP-8 PowerPAD™ package that must be soldered to a PCB ground plane. With 1 in² of 2-oz copper, its junction-to-ambient thermal resistance is 60°C/W. Adequate copper area and thermal vias under the pad are essential to maintain ≤125°C junction temperature at 3 A load - critical for automotive and industrial reliability.
Can LM22670QMRX-5.0/NOPB synchronize its switching frequency to an external clock?
Yes, LM22670QMRX-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 external clock on the rising edge. If synchronization is lost, it automatically reverts to its internal 500 kHz oscillator - ensuring graceful fallback behavior.
What protection features are built into LM22670QMRX-5.0/NOPB?
LM22670QMRX-5.0/NOPB integrates thermal shutdown (150°C), cycle-by-cycle current limiting (5.3 A typical peak), and input undervoltage lockout (UVLO with 4.3 V turn-on threshold). It also features soft-start (500 µs) to limit inrush current and precision enable with hysteresis (0.6 V) for controlled sequencing - collectively enabling robust operation in unregulated input environments.
LM22670QMRX-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
LM22670QMRX-5.0/NOPB FAQ
1.How can I place an order for LM22670QMRX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670QMRX-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 LM22670QMRX-5.0/NOPB reliable?
The price and inventory of LM22670QMRX-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 LM22670QMRX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22670QMRX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670QMRX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670QMRX-5.0/NOPB?
LM22670QMRX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670QMRX-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 LM22670QMRX-5.0/NOPB?
For technical support, including LM22670QMRX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670QMRX-5.0/NOPB requirements.
6.How does Aetrix verify that LM22670QMRX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22670QMRX-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 LM22670QMRX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22670QMRX-5.0/NOPB?
All LM22670QMRX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22670QMRX-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 LM22670QMRX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22670QMRX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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