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Texas Instruments LM22676QTJ-5.0/NOPB
- Part No.:
- LM22676QTJ-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22676QTJ-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:1,069
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Product details
Overview
LM22676QTJ-5.0/NOPB from Texas Instruments is a 42 V, 3 A synchronous step-down DC/DC regulator in an HSOP-8 PowerPAD package, featuring 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 supplies converting 12 V or 24 V input rails to stable 5 V logic rails.
For engineers reviewing the LM22676QTJ-5.0/NOPB datasheet, LM22676QTJ-5.0/NOPB pinout, LM22676QTJ-5.0/NOPB application, or LM22676QTJ-5.0/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance with exposed pad, enable threshold (1.6 V typ), soft-start timing (500 µs), and compatibility with low-ESR ceramic output capacitors.
Technical Context
The LM22676QTJ-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 is optimized for fixed 5 V output, eliminating external compensation components.
It integrates a 120 mΩ N-channel MOSFET switch, precision enable input with 0.6 V hysteresis, and thermal shutdown at 150°C. The BOOT/SW bootstrap circuit requires a 10 nF ceramic capacitor and mandates ≥5 mA minimum load for reliable gate drive recharge during each off-cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct regulation from 12 V/24 V industrial rails without pre-regulation |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback resistors; enables plug-and-play 5 V rail generation |
| Max Output Current | 3 A - sustains full load under worst-case thermal conditions with proper PCB copper area |
| Switching Frequency | 500 kHz ±20% - enables compact 2.2 µH–10 µH inductors and <100 µF ceramic output capacitance |
| Quiescent Current | 3.4 mA (typ) - minimizes no-load power loss in always-on systems |
| Standby Current | 25 µA (typ) - allows ultra-low-power shutdown mode for battery-backed subsystems |
| Enable Threshold | 1.6 V (typ), 0.6 V hysteresis - supports precise power sequencing with resistor dividers from other rails |
Pinout & Package
LM22676QTJ-5.0/NOPB uses the HSOP-8 PowerPAD (DDA) package with an exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (RθJA = 22°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Input supply connection | Accepts 4.5–42 V; must be bypassed with ≥10 µF low-ESR capacitor near pin |
| EN (Pin 7) | Logic-level enable input | Precision threshold (1.6 V) with hysteresis; internal 6 µA pull-up allows direct tie-to-VIN for always-on operation |
| SW (Pin 8) | Switch node | Connects to inductor; swings from GND to VIN; requires tight layout to minimize EMI and ringing |
| BOOT (Pin 3) | Bootstrap supply | Drives high-side MOSFET gate via external 10 nF ceramic capacitor between BOOT and SW |
| FB (Pin 6) | Feedback input | Internally connected to 5 V divider; shorted directly to VOUT for fixed-output configuration |
| GND (Pin 4) | Power and signal ground | Common return for VIN, SW, EN, FB; must be low-impedance connection to exposed pad |
| Exposed Pad | Thermal & electrical ground | Must be soldered to ≥1 cm² PCB copper area tied to system GND for thermal reliability |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Diode | Eliminates external bootstrap diode; reduces BOM count and layout area while ensuring reliable high-side gate drive |
| Stable with Ceramic Capacitors | Supports low-ESR ceramic output caps (≥10 µF) without requiring electrolytic or tantalum, improving reliability and temperature stability |
| Internal Soft-Start | 500 µs fixed ramp time prevents inrush current and output overshoot during startup without external components |
| Thermal Shutdown Protection | Activates at 150°C junction temperature and releases at ~135°C, preventing permanent damage during overload or poor heatsinking |
| WEBENCH® Enabled | Fully supported in TI's WEBENCH Power Designer for automated component selection, efficiency simulation, and thermal analysis |
Applications
| Industrial PLC I/O Module Power | Telecom Line Card Bias Supply |
|---|---|
Use Scenario: Providing isolated 5 V bias for digital I/O drivers and analog front-end circuits in programmable logic controllers operating from 24 V DC bus. IC Role / Device Role / Timing Role: Primary buck regulator generating clean, regulated 5 V rail with fast transient response to handle burst-mode sensor data acquisition. Use Value: Delivers 3 A continuous current with <1% load regulation, enabling simultaneous operation of multiple I/O channels without rail collapse. | Use Scenario: Generating 5 V auxiliary power for FPGA configuration, transceiver bias, and management MCU on telecom line cards fed from –48 V or +24 V backplane. IC Role / Device Role / Timing Role: Non-isolated step-down converter handling wide input variation (12–42 V) while maintaining tight 5 V tolerance across temperature. Use Value: ±1.5% reference accuracy and 500 kHz switching ensure stable core logic voltage even during hot-swap events and load transients. |
| Embedded System Main Logic Rail | Automotive Body Control Module (BCM) |
Use Scenario: Supplying 5 V to microcontrollers, CAN transceivers, and peripheral ICs in fanless embedded gateways powered from 12 V vehicle battery or industrial 24 V supply. IC Role / Device Role / Timing Role: High-efficiency primary regulator with precision enable for controlled power-up sequencing and low-quiescent standby for sleep modes. Use Value: 25 µA shutdown current extends battery life in always-connected devices; thermal pad ensures operation up to 125°C ambient. | Use Scenario: Regulating 5 V for microcontroller, LIN transceivers, and LED drivers in automotive BCMs where input may dip to 4.5 V during cranking. IC Role / Device Role / Timing Role: Automotive-grade buck converter (Q1 qualification) with UVLO (4.3 V rising) and robust ESD protection (2 kV HBM). Use Value: Operates reliably across –40°C to +125°C junction temperature; withstands load dump and cold-crank conditions per AEC-Q100 Grade 1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670TJ-5.0/NOPB | Same architecture but TO-263-3 package; higher RθJA (60°C/W); no exposed thermal pad | Limited to lower ambient temperatures or reduced load current due to inferior thermal performance | Select when board space permits larger TO-263 footprint and thermal requirements are less stringent |
| TPS54340DDAR | 42 V, 3.5 A buck with adjustable frequency (100–2500 kHz); no integrated bootstrap diode; requires external bootstrap cap and diode | Greater design flexibility but increased component count and layout complexity | Select when variable switching frequency or higher peak current capability is required |
Compared with LM22670TJ-5.0/NOPB, LM22676QTJ-5.0/NOPB offers superior thermal performance via its PowerPAD package, enabling full 3 A output at higher ambient temperatures; compared with TPS54340DDAR, it simplifies design with integrated bootstrap diode and fixed-frequency operation but sacrifices frequency tunability.
Availability
LM22676QTJ-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power, and automotive body electronics requiring stable component supply with long-term lifecycle support.
Supply support for LM22676QTJ-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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The LM22676 product line delivers SIMPLE SWITCHER® buck regulators optimized for high-voltage industrial and automotive applications requiring ruggedness, wide input range, and minimal external components.
FAQ
What is the maximum input voltage rating for LM22676QTJ-5.0/NOPB?
The absolute maximum input voltage for LM22676QTJ-5.0/NOPB is 43 V, but the recommended operating range is 4.5 V to 42 V. Operation above 42 V risks exceeding safe operating area limits and may trigger overvoltage protection or cause permanent damage. Designers should maintain at least 1 V margin below 43 V in all conditions, including transients.
Does LM22676QTJ-5.0/NOPB require an external feedback resistor network?
No, LM22676QTJ-5.0/NOPB does not require external feedback resistors because it features a factory-trimmed internal voltage divider configured for fixed 5.0 V output. The FB pin is connected directly to the output capacitor. External resistors are only needed for adjustable versions like LM22676-ADJ.
How is thermal management implemented in LM22676QTJ-5.0/NOPB?
LM22676QTJ-5.0/NOPB uses an HSOP-8 PowerPAD package with an exposed thermal pad that must be soldered to a large copper area on the PCB tied to system ground. This achieves RθJA = 22°C/W, enabling full 3 A output at +125°C junction temperature when properly laid out. Thermal shutdown activates at 150°C to prevent damage.
Can LM22676QTJ-5.0/NOPB operate with ceramic output capacitors only?
Yes, LM22676QTJ-5.0/NOPB is explicitly designed to be stable with low-ESR ceramic output capacitors (≥10 µF). Its internal compensation eliminates the need for electrolytic or tantalum capacitors, improving reliability, lifetime, and temperature stability across –40°C to +125°C operation.
What is the purpose of the BOOT pin on LM22676QTJ-5.0/NOPB?
The BOOT pin on LM22676QTJ-5.0/NOPB provides the floating supply voltage for the high-side N-channel MOSFET gate driver. It connects via a 10 nF ceramic capacitor to the SW pin, forming a charge pump that generates ~VIN + 5 V to fully enhance the internal switch. Proper BOOT capacitor placement is critical for reliable operation.
LM22676QTJ-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
LM22676QTJ-5.0/NOPB FAQ
1.How can I place an order for LM22676QTJ-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22676QTJ-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 LM22676QTJ-5.0/NOPB reliable?
The price and inventory of LM22676QTJ-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 LM22676QTJ-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22676QTJ-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22676QTJ-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22676QTJ-5.0/NOPB?
LM22676QTJ-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22676QTJ-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 LM22676QTJ-5.0/NOPB?
For technical support, including LM22676QTJ-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22676QTJ-5.0/NOPB requirements.
6.How does Aetrix verify that LM22676QTJ-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22676QTJ-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 LM22676QTJ-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22676QTJ-5.0/NOPB?
All LM22676QTJ-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22676QTJ-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 LM22676QTJ-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22676QTJ-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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