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Texas Instruments LM22679TJE-5.0/NOPB
- Part No.:
- LM22679TJE-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22679TJE-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 5A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:135
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Product details
Overview
LM22679TJE-5.0/NOPB from Texas Instruments is a 42-V input, 5-A synchronous step-down DC/DC regulator with fixed 5.0-V output, 500-kHz switching frequency, ±1.5% feedback reference accuracy, and integrated 100-mΩ N-channel MOSFET. It operates from –40°C to 125°C and delivers >90% efficiency in industrial power conversion applications.
For engineers reviewing the LM22679TJE-5.0/NOPB datasheet, LM22679TJE-5.0/NOPB pinout, LM22679TJE-5.0/NOPB application, or LM22679TJE-5.0/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal shutdown threshold (150°C), adjustable current limit via IADJ pin, soft-start programmability, and stability with low-ESR ceramic capacitors.
Technical Context
The LM22679TJE-5.0/NOPB implements voltage-mode PWM control with input voltage feedforward for stable loop gain across wide VIN variations. Its internal Type III compensation eliminates external compensation components and is optimized for fixed 5-V output configurations.
It integrates a bootstrap diode, supports adjustable soft-start via external capacitor on SS pin, and provides peak current limiting settable from 6.0 A to 8.4 A using an external resistor on IADJ. Thermal shutdown activates at 150°C with hysteresis to 135°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports wide-input industrial and automotive battery-fed systems |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider, simplifies BOM |
| Max Output Current | 5 A - enables single-regulator solutions for mid-power embedded systems |
| Switching Frequency | 500 kHz - allows compact 2.2–4.7 µH inductors and <100 µF ceramic output capacitance |
| RDS(ON) | 0.10 Ω (typ) - reduces conduction loss and improves full-load efficiency |
| Junction Temp Range | –40°C to 125°C - qualified for harsh industrial environments without derating |
| Quiescent Current | 3.4 mA (typ) - enables low-noise standby operation in always-on subsystems |
Pinout & Package
LM22679TJE-5.0/NOPB uses the TO-263-7 (NDR) package with exposed thermal pad (EP), measuring 10.16 mm × 9.85 mm. The EP must be soldered to a PCB ground plane for thermal management and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch Node | Drives external inductor; swings between GND and VIN during operation |
| VIN | Power Input | Primary supply rail (4.5–42 V); connects to bulk input capacitor |
| BOOT | Bootstrap Supply | Bias source for high-side MOSFET gate; requires 10-nF ceramic cap to SW |
| GND | Power Ground | System return path; ties to EP for thermal and noise integrity |
| IADJ | Current Limit Adjust | Resistor-to-GND sets peak switch current (6–8.4 A); floating = default 7.1 A |
| FB | Feedback Input | Internally connected to 5-V reference; shorted to VOUT for fixed-output mode |
| SS | Soft-Start Control | External capacitor (100 nF–1 µF) extends startup ramp time linearly per TSS ≈ 26 ms/µF |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated voltage-mode control | Eliminates external compensation network; reduces design cycle time and layout sensitivity |
| Stable with low-ESR ceramic capacitors | Enables use of compact, high-reliability MLCCs instead of electrolytics or tantalums |
| Integrated bootstrap diode | Removes need for external bootstrap diode; simplifies layout and improves reliability |
| Adjustable soft-start | Prevents inrush current and output overshoot; programmable from ~500 µs to >25 ms |
| UVLO with 4.3 V rising threshold | Ensures clean startup only when input rail is sufficiently established |
Applications
| Industrial Distributed Power | Test & Measurement Equipment |
|---|---|
Use Scenario: Converting 24-V or 42-V factory bus to stable 5-V logic rail for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5-V/5-A power with fast transient response to load steps. Use Value: High efficiency (>90%) minimizes heat buildup in enclosed cabinets; wide VIN accommodates brownout conditions. | Use Scenario: Supplying precision analog front-ends and digital controllers in portable multimeters and signal generators. IC Role / Device Role / Timing Role: Main 5-V supply with low ripple and tight regulation to support ADC reference stability and microcontroller clock integrity. Use Value: ±1.5% VFB accuracy ensures consistent 5-V output across temperature; soft-start prevents meter calibration drift during power-up. |
| Appliance Control Boards | General-Purpose Wide VIN Systems |
Use Scenario: Powering MCU, display, and communication ICs in smart home appliances operating from rectified AC or 24-V DC rails. IC Role / Device Role / Timing Role: Single-chip 5-V regulator replacing multi-stage linear solutions; handles variable input due to transformer tolerance or battery aging. Use Value: Integrated thermal shutdown and current limiting protect against motor stall or short-circuit faults without external circuitry. | Use Scenario: Providing robust 5-V bias for FPGA configuration, Ethernet PHYs, and USB hubs in field-deployable edge devices. IC Role / Device Role / Timing Role: High-voltage input buck converter enabling direct connection to 36-V PoE++ or 42-V automotive subsystems. Use Value: 42-V absolute max rating and –40°C to 125°C operation ensure compatibility with unregulated industrial and transportation power sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22678TJE-5.0/NOPB | Same pinout, 3-A output rating, lower RDS(ON) (90 mΩ), identical features and package | Suitable where 3-A load suffices; lower thermal stress at same PCB area | Select for cost-sensitive or thermally constrained 3-A designs; not drop-in for 5-A loads |
| LM61460RQWR | 3–36-V input, 6-A output, synchronous, PFM/PWM mode, lower IQ (26 µA), improved EMI performance | Requires different layout (QFN-16), no IADJ/SS pins; targets ultra-low standby and noise-critical apps | Choose for next-gen designs prioritizing efficiency, EMI, and smaller footprint over legacy pin compatibility |
Compared with LM22679TJE-5.0/NOPB, LM22678TJE-5.0/NOPB offers reduced current capability but better thermal margin at lower cost, while LM61460RQWR delivers higher integration and efficiency at the expense of pinout and feature compatibility - making it a generational upgrade rather than a direct replacement.
Availability
LM22679TJE-5.0/NOPB is available at Aetrix Electronics and suitable for industrial distributed power, test and measurement equipment, and appliance control boards requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM22679TJE-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 over 90 years of innovation history.
The LM22679TJE-5.0/NOPB belongs to TI's SIMPLE SWITCHER® family-designed for ease-of-use in high-voltage DC/DC conversion with minimal external components and full WEBENCH® design tool integration.
FAQ
What is the maximum input voltage rating for LM22679TJE-5.0/NOPB?
The LM22679TJE-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 may trigger overvoltage protection or reduce reliability. The device includes internal UVLO that disables operation below 3.9 V (falling) and re-enables above 4.3 V (rising), ensuring clean startup under marginal input conditions. This makes LM22679TJE-5.0/NOPB suitable for 24-V and 36-V industrial bus applications with transient headroom.
Does LM22679TJE-5.0/NOPB require an external feedback resistor divider?
No, LM22679TJE-5.0/NOPB does not require an external feedback resistor divider because it features a factory-trimmed internal 5.0-V reference and fixed-output architecture. The FB pin is internally connected to this reference and must be directly tied to the output (VOUT) for proper regulation. In contrast, the LM22679-ADJ variant requires an external divider. This simplifies layout, reduces BOM count, and improves long-term output accuracy by eliminating resistor drift and noise coupling - a key advantage of LM22679TJE-5.0/NOPB in production systems.
How is current limit adjusted on LM22679TJE-5.0/NOPB?
Current limit on LM22679TJE-5.0/NOPB is adjusted using an external resistor between the IADJ pin and GND. With IADJ floating, the default peak switch current is 7.1 A (typ). Connecting a resistor sets the limit per Figure 7-3 in the datasheet: e.g., 10 kΩ yields ~6.0 A, 2.2 kΩ yields ~8.4 A. The adjustment occurs at startup and remains fixed until reset by shutdown or thermal fault. Accuracy is ±35%/–25% versus the default setting. This feature allows LM22679TJE-5.0/NOPB to be tailored for specific inductor and diode ratings, optimizing cost and thermal performance.
What thermal management is required for LM22679TJE-5.0/NOPB?
LM22679TJE-5.0/NOPB requires soldering its exposed pad (EP) to a minimum 1-inch² copper pour connected to GND for effective thermal dissipation. With this layout, its junction-to-ambient thermal resistance (RθJA) is 22°C/W. At 5-A load and 12-V input, power dissipation exceeds 2.5 W - necessitating adequate copper area and airflow to maintain TJ ≤ 125°C. The device includes thermal shutdown at 150°C with 15°C hysteresis. For high-ambient or sealed environments, derating or forced air may be needed. Proper thermal design ensures LM22679TJE-5.0/NOPB sustains full 5-A output without throttling.
Is LM22679TJE-5.0/NOPB compatible with WEBENCH® design tools?
Yes, LM22679TJE-5.0/NOPB is fully WEBENCH® enabled. TI's WEBENCH® Designer supports complete schematic generation, component selection (inductor, capacitor, diode), electrical simulation (efficiency, ripple, transient response), thermal modeling, and PCB layout guidance for LM22679TJE-5.0/NOPB. Users can input target parameters (VIN, VOUT, IOUT, ambient temp) and receive validated designs with BOM, performance plots, and build-it board options. This integration accelerates development and reduces risk - confirming that LM22679TJE-5.0/NOPB meets system-level requirements before prototyping.
LM22679TJE-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:
- 5A
- 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
LM22679TJE-5.0/NOPB FAQ
1.How can I place an order for LM22679TJE-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22679TJE-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 LM22679TJE-5.0/NOPB reliable?
The price and inventory of LM22679TJE-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 LM22679TJE-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22679TJE-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22679TJE-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22679TJE-5.0/NOPB?
LM22679TJE-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22679TJE-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 LM22679TJE-5.0/NOPB?
For technical support, including LM22679TJE-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22679TJE-5.0/NOPB requirements.
6.How does Aetrix verify that LM22679TJE-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22679TJE-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 LM22679TJE-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22679TJE-5.0/NOPB?
All LM22679TJE-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22679TJE-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 LM22679TJE-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22679TJE-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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