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Texas Instruments LM22678TJE-5.0/NOPB
- Part No.:
- LM22678TJE-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22678TJE-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 5A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:3,301
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Product details
Overview
LM22678TJE-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 LM22678TJE-5.0/NOPB datasheet, LM22678TJE-5.0/NOPB pinout, LM22678TJE-5.0/NOPB application, or LM22678TJE-5.0/NOPB equivalent, this device offers voltage-mode control, internal loop compensation, precision enable, integrated soft-start (500 µs), and thermal shutdown - all in a thermally enhanced PFM (TO-263-7) package.
Technical Context
The LM22678TJE-5.0/NOPB implements a voltage-mode PWM architecture with input voltage feedforward to stabilize loop gain across wide VIN ranges. Its internal Type III compensation eliminates external compensation components for stable operation with ceramic output capacitors.
It integrates a high-side N-channel MOSFET switch, bootstrap diode, and precision enable comparator with 1.6-V threshold and 0.6-V hysteresis. Thermal shutdown activates at 150°C, and current limiting protects against overloads with 6.0–8.4-A trip range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports wide-VIN industrial and automotive supply rails without pre-regulation. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider; suitable for powering logic, microcontrollers, and analog circuitry. |
| Max Output Current | 5 A - delivers full rated load with proper PCB thermal design using exposed pad ground connection. |
| Switching Frequency | 500 kHz (±20%) - enables compact magnetics and good transient response; minimum on-time 100 ns. |
| Quiescent Current | 3.4 mA typical - low operating IQ supports efficient mid-load performance. |
| Standby Current | 25 µA typical - enables ultra-low-power shutdown for battery-backed or always-on systems. |
| RDS(ON) | 100 mΩ max - reduces conduction losses and improves thermal margin at full load. |
| Junction Temp Range | –40°C to 125°C - qualified for harsh environments including industrial controls and test equipment. |
Pinout & Package
LM22678TJE-5.0/NOPB uses the PFM (TO-263-7) package: 10.16 mm × 9.85 mm body with exposed thermal pad (EP) soldered to PCB ground plane for optimal thermal dissipation (RθJA = 22°C/W with 1-in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Drives external inductor; swings from GND to VIN; requires low-inductance layout to minimize EMI. |
| VIN | Input supply | Accepts 4.5–42 V; must be decoupled near pin with low-ESR ceramic capacitor. |
| GND | Power ground | Common return for power and control circuits; connects directly to EP for thermal path. |
| BOOT | Bootstrap supply | Provides gate drive for internal high-side MOSFET via 10-nF ceramic capacitor to SW. |
| FB | Feedback input | Internally tied to 5.0-V reference; shorted to VOUT for fixed-output operation. |
| EN | Enable control | Logic-level input (1.6-V threshold); enables precise power sequencing and external UVLO implementation. |
| NC | No connect | Electrically isolated; functions as thermal conductor only - must be grounded per layout guidelines. |
| EP | Exposed pad | Thermal and electrical ground; mandatory solder connection to PCB ground plane for reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control | Eliminates external compensation network - simplifies design and reduces BOM count for fixed 5-V output. |
| Integrated bootstrap diode | Removes need for external bootstrap diode - reduces component count and layout complexity. |
| 500-µs internal soft-start | Prevents inrush current and output overshoot during startup - no external timing capacitor required. |
| Precision enable with hysteresis | Enables reliable power sequencing and external undervoltage lockout using resistor dividers from other rails. |
| Stable with ceramic capacitors | Supports low-ESR, high-frequency ceramic output caps - lowers cost and footprint vs. electrolytic solutions. |
| Thermal shutdown & current limit | Protects against sustained overload and PCB overheating - auto-recovery after junction cools below 135°C. |
Applications
| Industrial Power Supply | Test Equipment Rail |
|---|---|
Use Scenario: Distributed 24-V or 42-V bus powering local 5-V logic and interface ICs in PLC I/O modules. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5-V rail with high line/load regulation and fast transient response. Use Value: Delivers 5 A continuously at >90% efficiency while maintaining ±1.5% output accuracy across temperature and line variations. | Use Scenario: Precision 5-V supply for ADC references, DAC buffers, and FPGA I/O banks in benchtop analyzers. IC Role / Device Role / Timing Role: Low-noise, tightly regulated DC source with minimal ripple and controlled startup timing. Use Value: Fixed 5.0-V output with 500-kHz switching enables small filter components; soft-start prevents measurement disturbance during power-up. |
| Appliance Control Board | General-Purpose Wide-VIN System |
Use Scenario: Main 5-V rail generation from variable battery or rectified AC input in smart home hubs and HVAC controllers. IC Role / Device Role / Timing Role: Robust, thermally managed voltage regulator supporting intermittent high-current loads (relays, displays). Use Value: –40°C to 125°C operation and integrated thermal protection ensure reliability in unventilated enclosures. | Use Scenario: Universal 5-V supply in field-deployable instrumentation where input voltage may vary from 12 V to 42 V. IC Role / Device Role / Timing Role: Single-component solution replacing multi-stage designs - accepts wide input without derating. Use Value: 42-V absolute maximum rating and 4.5-V minimum start-up enable direct connection to 24-V or 36-V systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670TJE-5.0/NOPB | 3-A rated version; same package, pinout, and features but lower current capability. | Suitable for <3-A loads; reduced thermal stress and smaller inductor sizing. | Select when full 5-A output is not required - lower cost and simpler thermal management. |
| LM61460PWRR | 6-A, 3–36-V input, lower quiescent current (26 µA), and optimized EMI performance. | Better suited for noise-sensitive applications and tighter input ranges; requires different compensation. | Choose for new designs prioritizing EMI compliance and standby efficiency - not pin-compatible. |
Compared with LM22678TJE-5.0/NOPB, LM22670TJE-5.0/NOPB offers identical functionality at reduced current capacity, while LM61460PWRR provides higher efficiency and lower EMI but requires layout and compensation redesign - neither is pin-to-pin compatible.
Availability
LM22678TJE-5.0/NOPB is available at Aetrix Electronics and suitable for industrial distributed power, test and measurement equipment, and appliance control applications requiring stable component supply and long-term manufacturability.
Supply support for LM22678TJE-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.
LM22678TJE-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 recommended input voltage range for LM22678TJE-5.0/NOPB?
The LM22678TJE-5.0/NOPB operates over a recommended input voltage range of 4.5 V to 42 V. This wide range supports direct connection to 12-V, 24-V, and 36-V industrial buses and battery systems. Operation below 4.5 V may trigger undervoltage lockout, while exceeding 42 V risks damage per absolute maximum ratings.
Does LM22678TJE-5.0/NOPB require external compensation components?
No, LM22678TJE-5.0/NOPB features fully internal loop compensation optimized for fixed 5-V output. Unlike adjustable versions, it does not require external RC networks - reducing design complexity and component count while ensuring stability with standard ceramic output capacitors.
How is the 5-V output set on LM22678TJE-5.0/NOPB?
The LM22678TJE-5.0/NOPB has a factory-trimmed internal feedback divider that fixes the output to 5.0 V. The FB pin is internally connected to this network and must be shorted directly to VOUT - no external resistors are needed, eliminating tolerance drift and layout sensitivity associated with discrete dividers.
What thermal management is required for LM22678TJE-5.0/NOPB at full 5-A load?
At full 5-A load, LM22678TJE-5.0/NOPB requires the exposed pad (EP) to be soldered to a minimum 1-in² copper area connected to system ground. With this layout, thermal resistance is 22°C/W. For continuous 5-A operation in ambient >70°C, additional copper or airflow is recommended to maintain junction temperature ≤125°C.
Can LM22678TJE-5.0/NOPB be used in automotive applications?
The LM22678TJE-5.0/NOPB is not AEC-Q100 qualified. For automotive use, TI specifies the LM22678-Q1 variant, which is grade 1 qualified (–40°C to +125°C) and undergoes additional stress testing. LM22678TJE-5.0/NOPB is intended for industrial and commercial applications only.
LM22678TJE-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
LM22678TJE-5.0/NOPB FAQ
1.How can I place an order for LM22678TJE-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22678TJE-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 LM22678TJE-5.0/NOPB reliable?
The price and inventory of LM22678TJE-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 LM22678TJE-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22678TJE-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22678TJE-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22678TJE-5.0/NOPB?
LM22678TJE-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22678TJE-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 LM22678TJE-5.0/NOPB?
For technical support, including LM22678TJE-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22678TJE-5.0/NOPB requirements.
6.How does Aetrix verify that LM22678TJE-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22678TJE-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 LM22678TJE-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22678TJE-5.0/NOPB?
All LM22678TJE-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22678TJE-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 LM22678TJE-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22678TJE-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22678TJE-5.0/NOPB Tags
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TPS562201DDCR
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AZ34063UMTR-G1
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MC34063EBD-TR
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