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Texas Instruments LM22670MRE-5.0/NOPB
- Part No.:
- LM22670MRE-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22670MRE-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:768
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Product details
Overview
LM22670MRE-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 switching frequency, and integrated bootstrap diode for high-side gate drive. It operates across –40°C to 125°C and supports industrial power rails converting 12 V or 24 V inputs to stable 5 V logic supplies.
For engineers reviewing the LM22670MRE-5.0/NOPB datasheet, LM22670MRE-5.0/NOPB pinout, LM22670MRE-5.0/NOPB application, or LM22670MRE-5.0/NOPB equivalent, key selection considerations include its fixed 5 V output configuration, internal voltage-mode compensation, thermal shutdown protection, and compatibility with low-ESR ceramic output capacitors without external loop components.
Technical Context
The LM22670MRE-5.0/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain against VIN variations, enabling optimized transient response. Its internal Type III compensation network is pre-tuned for fixed 5 V output operation and eliminates need for 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 adjustable frequency (200–1000 kHz) 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 wide industrial and automotive supply rails including 12 V, 24 V, and 36 V nominal systems. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider; ensures accurate logic-level rail for microcontrollers and peripherals. |
| Max Output Current | 3 A continuous - sufficient for powering FPGA I/O banks, DSP cores, or multiple digital ICs from single stage. |
| Switching Frequency | 500 kHz default - enables compact magnetics and ceramic capacitors; adjustable from 200 kHz to 1 MHz via RT/SYNC resistor. |
| Quiescent Current | 3.4 mA typical - balances efficiency at light load while maintaining fast wake-up from active mode. |
| Standby Current | 25 µA typical - enables ultra-low-power shutdown for battery-backed or always-on subsystems. |
| Thermal Shutdown | 150°C junction - protects against sustained overload or poor heatsinking without external thermal management circuitry. |
Pinout & Package
LM22670MRE-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. Junction-to-ambient thermal resistance is 60°C/W with 1 in² copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch Node | Drives external inductor; swings between ~0 V and VIN; requires low-inductance layout to minimize EMI and ringing. |
| 2 VIN | Input Supply | Primary power input (4.5–42 V); must be decoupled near pin with low-ESR ceramic capacitor. |
| 3 BOOT | Bootstrap Supply | Connects to SW via 10 nF ceramic capacitor; provides gate drive voltage for internal high-side MOSFET. |
| 4 GND | Power Ground | System ground return; tied to exposed pad for thermal and electrical integrity. |
| 5 RT/SYNC | Oscillator Control | Selects operating mode: floating = 500 kHz, resistor-to-GND = adjustable frequency, external clock = synchronization. |
| 6 FB | Feedback Input | Internally tied to 5.0 V reference; not used in -5.0 version - pin must be left open or grounded per datasheet guidance. |
| 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 - leave unconnected and unpopulated on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Internally Compensated Voltage Mode Control | Eliminates external compensation network; reduces BOM count and design iteration time for fixed 5 V output. |
| Stable With Low-ESR Ceramic Capacitors | Enables use of compact, high-reliability X7R/X5R MLCCs instead of bulkier electrolytics - improves long-term stability and temperature performance. |
| Integrated Bootstrap Diode | Removes need for external bootstrap diode; simplifies layout and increases reliability in high-duty-cycle applications. |
| Integrated Soft-Start (500 µs) | Prevents inrush current and output overshoot during power-up; avoids need for external soft-start timing capacitor. |
| Precision Enable with UVLO Support | Allows controlled power sequencing and system-level undervoltage lockout using simple resistor dividers - critical for multi-rail embedded systems. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering isolated digital I/O drivers, ADC references, and CAN transceivers in modular PLC backplanes. IC Role / Device Role / Timing Role: Primary 5 V buck regulator supplying logic rails for field-side interface ICs and microcontroller peripherals. Use Value: Wide 4.5–42 V input range accommodates 24 V industrial bus fluctuations; thermal shutdown ensures robustness during short-circuit faults on I/O lines. | Use Scenario: Generating 5 V supply for microcontroller, LIN transceiver, and sensor signal conditioning in body electronics modules. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter providing clean, regulated 5 V rail independent of battery voltage sag during cranking. Use Value: –40°C to 125°C operation meets automotive ambient requirements; 25 µA shutdown current minimizes battery drain in sleep mode. |
| Telecom Remote Radio Unit | Embedded Medical Diagnostic Interface |
Use Scenario: Converting 48 V telecom rectified input to 5 V for FPGA configuration, Ethernet PHY, and memory interfaces. IC Role / Device Role / Timing Role: High-voltage step-down regulator delivering stable 5 V under variable load and temperature conditions. Use Value: 500 kHz switching enables small 2.2 µH inductors and 10 µF ceramic output caps; reduces board area in space-constrained RRUs. | Use Scenario: Supplying 5 V to patient-connected analog front-end ICs, isolation controllers, and USB interface chips in portable diagnostic devices. IC Role / Device Role / Timing Role: Safety-critical power stage providing low-noise, well-regulated 5 V rail with built-in fault protection. Use Value: ±1.5% output accuracy ensures precise ADC reference stability; integrated soft-start prevents transient-induced data corruption during power-up. |
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 pinout and features but rated for 45 V max input (vs. 42 V); identical 3 A output and 5 V fixed output. | Suitable for higher-input systems like 36 V industrial buses or 48 V telecom where margin above 42 V is required. | Select when input voltage may exceed 42 V; otherwise LM22670MRE-5.0/NOPB offers identical performance at lower cost. |
| TPS54302DDAR | 3 A, 5.5–28 V input, fixed 5 V output; smaller SO-8 package; no integrated bootstrap diode; requires external diode. | Better suited for lower-input applications (<28 V); lacks wide VIN capability and thermal robustness of LM22670MRE-5.0/NOPB. | Choose only if input stays below 28 V and board space is constrained; not drop-in compatible due to different pinout and missing bootstrap diode. |
Compared with LM22671MRE-5.0/NOPB, the LM22670MRE-5.0/NOPB offers tighter input voltage margin (42 V vs. 45 V) but identical regulation accuracy and thermal protection; versus TPS54302DDAR, it delivers superior wide-input capability and integrated bootstrap functionality at the expense of larger footprint.
Availability
LM22670MRE-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, automotive body electronics, and telecom remote radio units requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM22670MRE-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® step-down regulators designed for ease-of-use in high-voltage, medium-current applications where minimal external components and proven reliability are essential.
FAQ
What is the maximum input voltage rating for LM22670MRE-5.0/NOPB?
The LM22670MRE-5.0/NOPB has an absolute maximum input voltage rating of 43 V, with recommended operating range from 4.5 V to 42 V. Exceeding 42 V continuously risks violating safe operating area limits and may trigger overvoltage protection or degrade long-term reliability. The device's internal 120 mΩ MOSFET and voltage-mode control architecture are validated for stable operation within this 4.5–42 V window, making LM22670MRE-5.0/NOPB ideal for 24 V and 36 V industrial systems.
Does LM22670MRE-5.0/NOPB require external compensation components?
No, LM22670MRE-5.0/NOPB does not require external compensation components. Its internal Type III voltage-mode compensation network is factory-tuned for fixed 5 V output operation, eliminating the need for external resistors or capacitors in the feedback loop. This simplifies design, reduces BOM count, and ensures stability across the full load and temperature range - a key advantage over adjustable regulators like LM22670-ADJ, which rely on external feedback dividers and may require additional compensation.
Can LM22670MRE-5.0/NOPB synchronize to an external clock?
Yes, LM22670MRE-5.0/NOPB can synchronize to an external clock via the RT/SYNC pin. When driven with a clean square wave between 1.75 V and 3.5 V at frequencies from 500 kHz to 1 MHz, the device locks to the rising edge of the external signal. Synchronization mode is latched at startup and persists until EN or VIN is cycled. Note that current limit foldback is disabled during synchronization, and the external clock must exceed the internal 500 kHz frequency - a constraint explicitly defined in the LM22670MRE-5.0/NOPB Electrical Characteristics table.
What is the purpose of the NC pin on LM22670MRE-5.0/NOPB?
The NC (No Connect) pin on LM22670MRE-5.0/NOPB is Pin 2 in the HSOP-8 PowerPAD™ package and is not electrically bonded to any internal circuitry. It serves only as a mechanical placeholder and must remain unconnected on the PCB. TI's datasheet confirms this pin has no internal function and advises leaving it floating - connecting it to any net (including GND or VIN) may compromise thermal performance or introduce unintended coupling paths. Its presence maintains package symmetry and aids automated assembly, but contributes zero electrical functionality to LM22670MRE-5.0/NOPB operation.
How does the enable pin (EN) function on LM22670MRE-5.0/NOPB?
The EN pin on LM22670MRE-5.0/NOPB provides precision logic-level control: the device turns on when EN voltage exceeds 1.6 V (typical) and shuts down when EN falls below 1.3 V (min), with 0.6 V hysteresis preventing chatter. An internal 6 µA pullup allows direct connection to VIN via a 470 kΩ resistor for simple activation. In shutdown, LM22670MRE-5.0/NOPB draws only 25 µA, making it suitable for battery-sensitive applications. The EN pin also supports external UVLO implementation using resistor dividers - a feature confirmed in Section 7.3.1 of the official SNVS584P datasheet.
LM22670MRE-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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM22670MRE-5.0/NOPB FAQ
1.How can I place an order for LM22670MRE-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670MRE-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 LM22670MRE-5.0/NOPB reliable?
The price and inventory of LM22670MRE-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 LM22670MRE-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22670MRE-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670MRE-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670MRE-5.0/NOPB?
LM22670MRE-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670MRE-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 LM22670MRE-5.0/NOPB?
For technical support, including LM22670MRE-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670MRE-5.0/NOPB requirements.
6.How does Aetrix verify that LM22670MRE-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22670MRE-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 LM22670MRE-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22670MRE-5.0/NOPB?
All LM22670MRE-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22670MRE-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 LM22670MRE-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22670MRE-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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