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Texas Instruments LM22670TJ-5.0/NOPB
- Part No.:
- LM22670TJ-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22670TJ-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:2,950
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Product details
Overview
LM22670TJ-5.0/NOPB from Texas Instruments is a 42-V input, 5-V fixed-output synchronous step-down DC/DC regulator delivering up to 3 A continuous load current. It integrates a 100-mΩ N-channel MOSFET switch in an HSOP-8 PowerPAD™ package, features voltage-mode control with internal compensation, 500-kHz default switching frequency, and ±1.5% feedback reference accuracy over –40°C to +125°C junction temperature. It is used in industrial power rails converting 12-V or 24-V inputs to stable 5-V logic supplies.
For engineers reviewing the LM22670TJ-5.0/NOPB datasheet, LM22670TJ-5.0/NOPB pinout, LM22670TJ-5.0/NOPB application, or LM22670TJ-5.0/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance in HSOP-8 (RθJA = 60°C/W), precision enable threshold (1.6 V typ), integrated bootstrap diode, and fixed 5-V output with no external feedback divider required.
Technical Context
The LM22670TJ-5.0/NOPB implements a voltage-mode PWM controller with input voltage feedforward for stable loop gain across wide VIN variations. Its internal Type III compensation is optimized for fixed 5-V output, eliminating external compensation components. The device uses a single-stage high-side N-channel MOSFET switch with integrated bootstrap diode and supports minimum on-time of 100 ns.
Functional modes include active regulation, precision enable-controlled shutdown (25 µA standby current), thermal shutdown at 150°C, and current limiting with foldback during severe overload. Switching frequency is factory-set to 500 kHz but adjustable from 200 kHz to 1 MHz via RT/SYNC pin or synchronizable to external clock up to 1 MHz.
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 need for external feedback resistors; ensures accurate logic-level rail generation. |
| Max Output Current | 3 A continuous - sufficient for powering microcontrollers, FPGAs, and interface ICs without external current boosting. |
| Switch RDS(on) | 100 mΩ (SO PowerPAD-8) - reduces conduction loss and improves efficiency at full load, especially with 12-V input. |
| Switching Frequency | 500 kHz default - enables use of compact 4.7-µH inductors and low-ESR ceramic capacitors for space-constrained designs. |
| Enable Threshold | 1.6 V (typ), 0.6 V hysteresis - allows precise power sequencing with resistor dividers and prevents false turn-on near UVLO boundary. |
| Junction Temp Range | –40°C to +125°C - qualified for harsh industrial and extended-temperature embedded applications. |
Pinout & Package
LM22670TJ-5.0/NOPB is housed in an HSOP-8 PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad connected to GND. The package provides low thermal resistance (RθJA = 60°C/W with 1-in² copper) and robust EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch Node | High-current switching output connected to inductor; swings between ~0 V and VIN; requires low-inductance layout. |
| 2 VIN | Input Supply | Main power input (4.5–42 V); decoupling capacitor must be placed adjacent to this pin and GND. |
| 3 BOOT | Bootstrap Supply | Connects to SW and external 10-nF ceramic capacitor; supplies gate drive for internal high-side MOSFET. |
| 4 GND | Power Ground | System ground return; connects to exposed pad; must be low-impedance plane for thermal and noise control. |
| 5 RT/SYNC | Oscillator Control | Configures switching mode: floating = 500 kHz, resistor-to-GND = adjustable (200 kHz–1 MHz), external clock = sync mode. |
| 6 FB | Feedback Input | Internally tied to 5-V reference; not connected externally for LM22670TJ-5.0/NOPB (fixed-output variant). |
| 7 EN | Enable Input | Logic-level control: <1.6 V disables regulator (25 µA IQ); >2.2 V enables; includes 0.6 V hysteresis and internal 6-µA pullup. |
| 8 NC | No Connect | Not electrically bonded; left unconnected per datasheet; serves as mechanical alignment aid only. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Diode | Eliminates external bootstrap diode, reducing BOM count and PCB area while ensuring reliable high-side gate drive. |
| Internal Loop Compensation | Enables stable operation with standard 4.7-µH inductors and 22-µF ceramic output capacitors-no external compensation network needed. |
| Soft-Start (500 µs) | Prevents inrush current and output overshoot during power-up; timing is fixed and automatic-no external component required. |
| Thermal Shutdown & Current Limit | Protects against sustained overload and PCB overheating: trips at 150°C junction temp and limits peak switch current to 3.4–5.3 A. |
| Stable with Ceramic Capacitors | Supports low-ESR ceramic output caps (≥22 µF) without requiring tantalum or electrolytic types-improves reliability and lifetime. |
Applications
| Industrial PLC Power Supply | Telecom Line Card Bias Rail |
|---|---|
|
Use Scenario: Generating isolated 5-V bias for FPGA configuration, Ethernet PHYs, and CAN transceivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting 24-V DC bus to clean 5-V logic rail with tight load regulation (<±0.5%) and fast transient response. Use Value: Delivers 3 A at >90% efficiency with minimal external components-reduces board area by 35% vs. discrete controller+MOSFET solutions. |
Use Scenario: Providing regulated 5-V supply to hot-swap controllers and management ASICs on telecom line cards powered from -48-V or +24-V backplanes. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator with precision enable for controlled power-up sequencing and brownout protection. Use Value: Withstands 42-V transients and operates down to 4.5 V, enabling reliable start-up after power interruption without external UVLO circuitry. |
| Automotive Body Control Module | Embedded System Main Logic Rail |
|
Use Scenario: Powering MCU, sensors, and LIN transceivers in under-hood modules where ambient temperature reaches 105°C. IC Role / Device Role / Timing Role: Automotive-grade (LM22670-Q1 family) buck converter with AEC-Q100 Grade 1 qualification and thermal foldback. Use Value: Maintains regulation across –40°C to +125°C junction range and shuts down cleanly at 150°C-meets ISO 16750-2 pulse test requirements. |
Use Scenario: Converting standard 12-V wall adapter or battery input to 5-V main system rail for ARM-based SBCs and IoT gateways. IC Role / Device Role / Timing Role: Fixed-output DC/DC regulator with integrated soft-start and enable control for coordinated system power management. Use Value: Reduces design cycle time via WEBENCH® integration-generates complete bill-of-materials, thermal simulation, and layout guidance in minutes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22671TJ-5.0/NOPB | Same pinout and electrical specs, but rated for 5-A output current and uses TO-263-7 package with lower RθJA (22°C/W). | Suitable for higher-power applications requiring >3 A or enhanced thermal margin in high-ambient environments. | Select when output current demand exceeds 3 A or PCB layout allows larger TO-263 footprint and improved heatsinking. |
| TPS54360DGQR | 42-V, 3.5-A buck with adjustable frequency (100 kHz–2.5 MHz), no integrated bootstrap diode, requires external high-side driver. | Better EMI control via spread-spectrum option and wider frequency tuning, but increases BOM and layout complexity. | Choose when system-level EMI compliance is critical or when synchronization to >1-MHz clocks is required-accepts added design effort. |
Compared with LM22670TJ-5.0/NOPB, LM22671TJ-5.0/NOPB offers higher current headroom in a thermally superior package, while TPS54360DGQR trades integrated simplicity for greater frequency flexibility and EMI mitigation-neither is pin-compatible, and both require layout revision.
Availability
LM22670TJ-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power conversion, and embedded system main rail applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM22670TJ-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 LM22670 series belongs to TI's SIMPLE SWITCHER® family-designed for ease-of-use in industrial, automotive, and telecom power systems where minimal external components, internal compensation, and robust thermal performance are essential.
FAQ
What is the maximum input voltage rating for LM22670TJ-5.0/NOPB?
The absolute maximum input voltage for LM22670TJ-5.0/NOPB is 43 V, but the recommended operating range is 4.5 V to 42 V. Operation above 42 V risks permanent damage even for short durations. This rating enables compatibility with 24-V and 36-V industrial buses and accommodates load-dump transients in automotive auxiliary systems.
Does LM22670TJ-5.0/NOPB require external feedback resistors?
No, LM22670TJ-5.0/NOPB has a factory-trimmed internal 5-V reference and fixed feedback connection-no external resistors are needed. The FB pin is internally connected to the reference and must remain unconnected in PCB layout. This eliminates resistor tolerance errors and simplifies design versus adjustable versions like LM22670-ADJ.
What package type does LM22670TJ-5.0/NOPB use, and how is thermal performance achieved?
LM22670TJ-5.0/NOPB uses the HSOP-8 PowerPAD™ package (4.89 mm × 3.90 mm) with an exposed thermal pad soldered to a GND plane. With 1 in² of 2-oz copper, its junction-to-ambient thermal resistance is 60°C/W. Layout best practices-such as multiple thermal vias under the pad and minimizing trace length on VIN/SW-ensure reliable 3-A operation at +85°C ambient.
Can LM22670TJ-5.0/NOPB synchronize to an external clock?
Yes, LM22670TJ-5.0/NOPB can synchronize to an external clock applied to the RT/SYNC pin. The external clock must be 50% duty cycle, have amplitude meeting VSYNC thresholds (1.75 V min), and operate between 500 kHz and 1 MHz. Synchronization is latched at startup and reverts to 500 kHz if the clock is lost during operation.
Is LM22670TJ-5.0/NOPB qualified for automotive applications?
LM22670TJ-5.0/NOPB is not AEC-Q100 qualified; however, it shares the same silicon die and functional specifications as the LM22670-Q1 variant, which is AEC-Q100 Grade 1 qualified (–40°C to +125°C). For automotive body electronics or infotainment systems requiring qualification, LM22670-Q1 should be specified instead.
LM22670TJ-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-7 Thin
- 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:
- TO-263-7 Thin
LM22670TJ-5.0/NOPB FAQ
1.How can I place an order for LM22670TJ-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670TJ-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 LM22670TJ-5.0/NOPB reliable?
The price and inventory of LM22670TJ-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 LM22670TJ-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22670TJ-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670TJ-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670TJ-5.0/NOPB?
LM22670TJ-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670TJ-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 LM22670TJ-5.0/NOPB?
For technical support, including LM22670TJ-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670TJ-5.0/NOPB requirements.
6.How does Aetrix verify that LM22670TJ-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22670TJ-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 LM22670TJ-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22670TJ-5.0/NOPB?
All LM22670TJ-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22670TJ-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 LM22670TJ-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22670TJ-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22670TJ-5.0/NOPB Tags
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