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Texas Instruments LM22670MR-5.0/NOPB
- Part No.:
- LM22670MR-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22670MR-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,036
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Product details
Overview
LM22670MR-5.0/NOPB from Texas Instruments is a 42-V input, 3-A synchronous step-down DC/DC regulator in HSOP-8 package with 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 V or 24 V inputs to stable 5 V for microcontrollers and interface ICs.
For engineers reviewing the LM22670MR-5.0/NOPB datasheet, LM22670MR-5.0/NOPB pinout, LM22670MR-5.0/NOPB application, or LM22670MR-5.0/NOPB equivalent, key selection criteria include its 4.5–42 V input range, internal voltage-mode compensation, thermal shutdown protection, 25 µA shutdown current, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The LM22670MR-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 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 a self-synchronizing RT/SYNC pin supporting 200 kHz–1 MHz adjustable frequency or external clock 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 connection to 24 V industrial buses and automotive battery rails without pre-regulation. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider, reduces BOM count, and ensures stable logic-level supply. |
| Max Output Current | 3 A continuous - sufficient for powering multiple MCU cores, FPGAs, or peripheral ICs in embedded systems. |
| Switching Frequency | 500 kHz default - enables compact 2.2 µH inductors and 22 µF ceramic output capacitors while maintaining good transient response. |
| Quiescent Current | 3.4 mA typical - minimizes no-load power loss in always-on subsystems such as CAN or sensor monitoring circuits. |
| Shutdown Current | 25 µA typical - enables ultra-low-power system sleep modes without external load switches. |
| Junction Temp Range | –40°C to +125°C - qualified for under-hood automotive and industrial control cabinet environments. |
Pinout & Package
LM22670MR-5.0/NOPB uses the HSOP-8 (PowerPAD™) package (4.89 mm × 3.90 mm) with exposed thermal pad connected to GND for enhanced heat dissipation. RθJA = 60°C/W with 1 in² PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Drives external inductor; swings between GND and VIN; requires low-inductance layout to minimize EMI. |
| 2 VIN | Main power input | Accepts 4.5–42 V; must be decoupled with ≥10 µF ceramic capacitor near pin. |
| 3 BOOT | Bootstrap supply | Connects to SW via 10 nF ceramic capacitor; powers high-side gate driver; minimum off-time ensures recharge. |
| 4 GND | Power and signal ground | Common return for VIN, FB, EN, and exposed pad; must tie exposed pad directly to GND plane. |
| 5 RT/SYNC | Oscillator control | Configures frequency mode: floating = 500 kHz, resistor-to-GND = 200 kHz–1 MHz, external clock = sync mode. |
| 6 FB | Feedback input | Internally tied to 5.0 V reference; not accessible - fixed-output configuration disables external divider. |
| 7 EN | Enable control | Logic-compatible input; 1.6 V threshold with 0.6 V hysteresis; pulls up internally at 6 µA for simple VIN-enable biasing. |
| 8 NC | No connect | Not electrically bonded; may serve as thermal conduction path; must remain unconnected in circuit. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external Schottky diode, reducing component count and board area in buck converter designs. |
| Internal loop compensation | Removes need for external compensation network - simplifies design and improves consistency across production units. |
| Stable with ceramic capacitors | Supports low-ESR MLCCs (e.g., X5R/X7R) on input/output - avoids bulk electrolytics and improves reliability and lifetime. |
| Precision enable with UVLO | Enables clean power sequencing and prevents startup at marginal input voltages (<4.3 V rising threshold). |
| Thermal shutdown & current limit | Protects against sustained overloads and PCB overheating without external sensing circuitry or fault management logic. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Powering isolated digital I/O drivers, ADC references, and RS-485 transceivers from a 24 V backplane rail. IC Role / Device Role / Timing Role: Primary 5 V point-of-load regulator delivering regulated power to mixed-signal subcircuits. Use Value: Maintains ±1.5% output accuracy across –40°C to +85°C ambient and 4.5–42 V input variation, ensuring consistent ADC LSB resolution and transceiver timing margins. |
Use Scenario: Supplying 5 V to microcontroller, LIN transceiver, and LED drivers in door module electronics. IC Role / Device Role / Timing Role: Main system regulator operating from vehicle battery with cold-crank tolerance down to 4.5 V. Use Value: 25 µA shutdown current extends battery life during vehicle sleep mode; thermal shutdown prevents failure during prolonged high-ambient operation. |
| Telecom Remote Radio Head | Medical Patient Monitor Auxiliary Rail |
|
Use Scenario: Generating clean 5 V from 48 V intermediate bus for FPGA configuration and Ethernet PHYs. IC Role / Device Role / Timing Role: Secondary buck regulator in multi-rail power architecture with strict EMI requirements. Use Value: 500 kHz fixed frequency allows predictable filter design and avoids interference with 4G/5G RF bands; SYNC pin enables interleaving with other rails. |
Use Scenario: Providing isolated 5 V for USB host controllers and touch-screen controllers in Class II medical devices. IC Role / Device Role / Timing Role: Safety-critical auxiliary power supply requiring high reliability and low standby power. Use Value: –40°C to +125°C junction rating supports operation inside sealed enclosures; integrated soft-start (500 µs) prevents inrush-induced voltage droop on shared 5 V bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22671MR-5.0/NOPB | Same pinout and electrical specs, but rated only to 125°C junction (no extended temp grade); lacks AEC-Q100 qualification. | Suitable for commercial/industrial use where automotive qualification is unnecessary. | Select when cost sensitivity outweighs automotive compliance needs and ambient temperature stays ≤85°C. |
| TPS54340DDAR | 42 V, 3.5 A, adjustable output; requires external feedback divider; 100 µA shutdown current; no integrated bootstrap diode. | Better suited for designs needing programmable output or higher peak current headroom. | Choose when flexibility in output voltage or higher overload capability is required, accepting added BOM and layout complexity. |
Compared with LM22670MR-5.0/NOPB, LM22671MR-5.0/NOPB offers identical functionality at lower cost but without automotive qualification, while TPS54340DDAR trades integration for configurability - making LM22670MR-5.0/NOPB optimal for fixed 5 V, AEC-Q100-compliant, space-constrained designs.
Availability
LM22670MR-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 support, and AEC-Q100 Grade 1 compliance.
Supply support for LM22670MR-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 LM22670MR-5.0/NOPB belongs to TI's SIMPLE SWITCHER® family - engineered for ease-of-use in rugged industrial and automotive applications where minimal external components, robust thermal performance, and fast time-to-market are critical.
FAQ
What is the maximum input voltage rating for LM22670MR-5.0/NOPB?
The absolute maximum input voltage for LM22670MR-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 SOA limits and may trigger thermal shutdown. The device is specifically designed for 24 V and 48 V intermediate bus applications with cold-crank and load-dump margin.
Does LM22670MR-5.0/NOPB require an external feedback resistor divider?
No, LM22670MR-5.0/NOPB does not require an external feedback resistor divider because it is a fixed 5.0 V output variant. The FB pin is internally connected to the 5.0 V reference, eliminating external components and associated tolerance errors. This differs from the LM22670-ADJ version, which requires an external divider.
Can LM22670MR-5.0/NOPB synchronize to an external clock?
Yes, LM22670MR-5.0/NOPB supports external clock 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), the device locks to the external clock on the rising edge. Loss of sync reverts it to the internal 500 kHz oscillator.
What thermal considerations apply to LM22670MR-5.0/NOPB in HSOP-8 package?
LM22670MR-5.0/NOPB in HSOP-8 has RθJA = 60°C/W with 1 in² copper; actual thermal performance depends on PCB copper area and airflow. The exposed pad must be soldered to a solid GND plane. At 3 A load and 12 V input, junction temperature rise is ~45°C above ambient - staying well below the 125°C max if ambient remains ≤80°C.
Is LM22670MR-5.0/NOPB AEC-Q100 qualified?
No - LM22670MR-5.0/NOPB is not AEC-Q100 qualified. Only the LM22670-Q1 variants (e.g., LM22670QMR-5.0/NOPB) carry AEC-Q100 Grade 1 qualification (–40°C to +125°C). LM22670MR-5.0/NOPB is rated for industrial temperature range and shares identical electrical specs but lacks automotive-specific stress testing and traceability documentation.
LM22670MR-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:
- 3A
- 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
LM22670MR-5.0/NOPB FAQ
1.How can I place an order for LM22670MR-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670MR-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 LM22670MR-5.0/NOPB reliable?
The price and inventory of LM22670MR-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 LM22670MR-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22670MR-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670MR-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670MR-5.0/NOPB?
LM22670MR-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670MR-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 LM22670MR-5.0/NOPB?
For technical support, including LM22670MR-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670MR-5.0/NOPB requirements.
6.How does Aetrix verify that LM22670MR-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22670MR-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 LM22670MR-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22670MR-5.0/NOPB?
All LM22670MR-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22670MR-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 LM22670MR-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22670MR-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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