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Texas Instruments LM22670QTJ-5.0/NOPB
- Part No.:
- LM22670QTJ-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22670QTJ-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:3,248
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Product details
Overview
LM22670QTJ-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 12–42 V inputs to stable 5 V for microcontroller cores and peripheral logic.
For engineers reviewing the LM22670QTJ-5.0/NOPB datasheet, LM22670QTJ-5.0/NOPB pinout, LM22670QTJ-5.0/NOPB application, or LM22670QTJ-5.0/NOPB equivalent, key selection criteria include its 4.5–42 V wide VIN range, internal voltage-mode compensation, thermal shutdown protection, precision enable threshold (1.6 V typ), and compatibility with low-ESR ceramic output capacitors.
Technical Context
The LM22670QTJ-5.0/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain across input variations, enabling optimized transient response without external compensation. Its internal type III compensation network is pre-tuned for fixed 5 V output operation.
It integrates a 120 mΩ N-channel MOSFET switch (PFM package), supports adjustable switching frequency (200–1000 kHz) via RT/SYNC pin, and features built-in soft-start (500 µs), precision enable with 0.6 V hysteresis, and self-synchronization capability for multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct connection to 12 V, 24 V, and 42 V industrial/automotive rails without pre-regulation. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback resistors and reduces BOM count for standard logic rail generation. |
| Max Output Current | 3 A continuous - sufficient for powering ARM Cortex-M7 microcontrollers, FPGAs I/O banks, and sensor interfaces. |
| Switching Frequency | 500 kHz default - enables compact 2.2 µH inductors and 22 µF ceramic output capacitors while maintaining >90% efficiency at full load. |
| Quiescent Current | 3.4 mA typical - ensures low no-load power loss in always-on subsystems such as CAN transceivers or real-time clocks. |
| Enable Threshold | 1.6 V typical with 0.6 V hysteresis - allows precise power sequencing using simple resistor dividers from upstream supplies. |
| Junction Temp Range | –40°C to +125°C - qualified for under-hood automotive and industrial control cabinet environments. |
Pinout & Package
LM22670QTJ-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 copper pour.
| 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 EMI and ringing. |
| 2 VIN | Input Supply | Primary power input (4.5–42 V); must be decoupled with ≥10 µF ceramic capacitor near pin. |
| 3 BOOT | Bootstrap Supply | Connects to SW and external 10 nF ceramic capacitor; powers high-side gate driver; requires short, wide traces. |
| 4 GND | Power Ground | System ground return; tied to exposed thermal pad; forms low-impedance path for switch current and thermal conduction. |
| 5 RT/SYNC | Oscillator Control | Configures frequency mode: floating = 500 kHz, resistor-to-GND = 200–1000 kHz, external clock = synchronization. |
| 6 FB | Feedback Input | Internally tied to 5.0 V reference; not used in fixed-output variant - leave unconnected per datasheet guidance. |
| 7 EN | Enable Control | Active-high logic input; 1.6 V threshold enables startup; 25 µA shutdown current enables ultra-low-power standby. |
| 8 NC | No Connect | Not electrically bonded; may be used as thermal relief pad but must remain unconnected in circuit. |
Key Features
| Feature | Design Value |
|---|---|
| Internally Compensated Voltage Mode Control | Eliminates need for external compensation components - reduces design cycle time and layout sensitivity for 5 V output. |
| Stable With Low-ESR Ceramic Capacitors | Enables use of compact, high-reliability X7R/X5R MLCCs instead of bulkier aluminum or tantalum capacitors. |
| Integrated Bootstrap Diode | Removes external Schottky diode requirement - simplifies bill of materials and improves reliability in high-temp operation. |
| Adjustable Switching Frequency & Synchronization | Supports EMI reduction via frequency dithering or system-level clock alignment across multiple rails without added ICs. |
| Integrated Soft-Start (500 µs) | Prevents inrush current during power-up - avoids tripping upstream fuses or causing bus droop in multi-rail systems. |
| Precision Enable with UVLO | Allows robust power sequencing and battery discharge prevention via programmable turn-on/off thresholds. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Powering isolated digital I/O drivers, analog front-end ADCs, and CAN transceivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary 5 V buck regulator supplying logic rails for microcontroller peripherals and interface ICs. Use Value: Wide 4.5–42 V input range accommodates unregulated 24 V factory floor supply with brownout tolerance; 125°C rating ensures reliability in enclosed cabinets. |
Use Scenario: Generating 5 V for microcontroller core, LIN transceivers, and LED drivers in door module ECUs. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter delivering clean, sequenced 5 V supply synchronized to vehicle battery monitoring system. Use Value: Precision enable pin enables controlled startup after main battery wake-up signal; thermal shutdown protects against under-dash temperature excursions. |
| Telecom Remote Radio Unit | Medical Infusion Pump Controller |
|
Use Scenario: Converting -48 V telecom supply (via intermediate 12 V stage) to 5 V for FPGA configuration and Ethernet PHYs. IC Role / Device Role / Timing Role: Secondary-stage buck regulator operating from intermediate 12 V rail with tight line regulation. Use Value: 90%+ efficiency minimizes heat in sealed RF enclosures; 500 kHz switching enables small magnetics compatible with PCB space constraints. |
Use Scenario: Providing safety-critical 5 V power to ARM-based motor control MCU and touch-screen interface in battery-operated devices. IC Role / Device Role / Timing Role: Main system regulator with soft-start and thermal protection to meet IEC 60601-1 leakage and fault tolerance requirements. Use Value: 25 µA shutdown current extends battery life during standby; ±1.5% output accuracy ensures consistent ADC reference and display brightness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22671QWJT-5.0/NOPB | Automotive-grade (AEC-Q100 Grade 1), identical electrical specs, TO-263-7 package with higher thermal performance (RθJA = 22°C/W). | Required for under-hood or safety-critical automotive modules where extended temperature validation is mandated. | Select when automotive qualification, higher ambient temperature margin, or improved thermal handling is required over HSOP-8. |
| TPS54340DDAR | 42 V, 3.5 A, adjustable output; requires external feedback resistors; 100% duty-cycle capability; no integrated bootstrap diode. | Suitable for designs needing variable output or 100% duty-cycle operation (e.g., low-dropout scenarios), but increases component count. | Choose if output voltage flexibility or 100% duty-cycle operation is needed - otherwise LM22670QTJ-5.0/NOPB offers lower BOM cost and simpler layout. |
Compared with LM22671QWJT-5.0/NOPB, the LM22670QTJ-5.0/NOPB trades automotive qualification and thermal performance for smaller footprint and lower cost in industrial applications; versus TPS54340DDAR, it provides fixed 5 V output with fewer external components but lacks 100% duty-cycle support.
Availability
LM22670QTJ-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power conversion, and embedded system power rails requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LM22670QTJ-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 specifically for ease-of-use in industrial, automotive, and telecom power systems where minimal external components and fast design-in are critical.
FAQ
What is the maximum input voltage rating for the LM22670QTJ-5.0/NOPB?
The LM22670QTJ-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 thermal shutdown or permanent damage. The device is commonly used with 24 V and 42 V industrial rails, and its robust input stage tolerates transient spikes up to 43 V for short durations.
Does the LM22670QTJ-5.0/NOPB require external feedback resistors to set the output voltage?
No - the LM22670QTJ-5.0/NOPB is the fixed 5.0 V output variant; its internal feedback divider is factory-trimmed to deliver 5.0 V ±1.5% without any external resistors. The FB pin is internally connected to the reference and must be left unconnected in this version, unlike the adjustable LM22670-ADJ variant which requires external resistor networks.
Can the LM22670QTJ-5.0/NOPB synchronize its switching frequency to an external clock source?
Yes - the LM22670QTJ-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 between 500 kHz and 1 MHz, the device locks to the external clock on the rising edge. This feature enables EMI reduction and timing coordination across multiple regulators in dense PCB layouts.
What thermal management considerations apply to the LM22670QTJ-5.0/NOPB in HSOP-8 package?
The LM22670QTJ-5.0/NOPB in HSOP-8 (QTJ) has a junction-to-ambient thermal resistance (RθJA) of 60°C/W with 1 in² of 2-oz copper. To maintain <125°C junction temperature at 3 A load, ensure the exposed thermal pad is soldered to a solid GND plane with ≥4 thermal vias (0.3 mm diameter). Avoid routing signals under the pad and verify board-level thermal performance using TI's WEBENCH® thermal simulation tool.
Is the LM22670QTJ-5.0/NOPB pin-compatible with other members of the LM22670 family?
Yes - the LM22670QTJ-5.0/NOPB shares identical pinout and package dimensions with LM22670-ADJ variants in HSOP-8 (QTJ) packaging. All share the same SW/VIN/BOOT/GND/RT-SYNC/EN pin assignments; only the FB pin function differs (internal reference vs. external divider input). This enables drop-in replacement in fixed-output designs without layout changes.
LM22670QTJ-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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-7 Thin
LM22670QTJ-5.0/NOPB FAQ
1.How can I place an order for LM22670QTJ-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670QTJ-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 LM22670QTJ-5.0/NOPB reliable?
The price and inventory of LM22670QTJ-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 LM22670QTJ-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22670QTJ-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670QTJ-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670QTJ-5.0/NOPB?
LM22670QTJ-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670QTJ-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 LM22670QTJ-5.0/NOPB?
For technical support, including LM22670QTJ-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670QTJ-5.0/NOPB requirements.
6.How does Aetrix verify that LM22670QTJ-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22670QTJ-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 LM22670QTJ-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22670QTJ-5.0/NOPB?
All LM22670QTJ-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22670QTJ-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 LM22670QTJ-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22670QTJ-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22670QTJ-5.0/NOPB Tags
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