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Texas Instruments LM22676TJ-5.0/NOPB
- Part No.:
- LM22676TJ-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22676TJ-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:1,167
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Product details
Overview
LM22676TJ-5.0/NOPB from Texas Instruments is a 42 V, 3 A synchronous step-down DC/DC regulator in an 8-pin HSOP (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 rails converting 12 V or 24 V inputs to stable 5 V for microcontroller core logic.
For engineers reviewing the LM22676TJ-5.0/NOPB datasheet, LM22676TJ-5.0/NOPB pinout, LM22676TJ-5.0/NOPB application, or LM22676TJ-5.0/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance with exposed pad, enable threshold hysteresis (0.6 V), minimum on-time (100 ns), and compatibility with low-ESR ceramic output capacitors.
Technical Context
The LM22676TJ-5.0/NOPB implements voltage-mode PWM control with input voltage feedforward to stabilize 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 100 mΩ N-channel MOSFET switch (HSOP package), precision enable input with 1.6 V turn-on threshold and 0.6 V hysteresis, and soft-start with 500 µs ramp time. Thermal shutdown activates at 150°C with 135°C hysteresis, and current limiting protects against overloads up to 5.5 A peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% (ensures stable logic supply without external resistor divider) |
| Input Voltage Range | 4.5 V to 42 V (supports 12 V/24 V industrial rails and automotive cold-crank transients) |
| Switching Frequency | 500 kHz ±20% (enables compact 2.2 µH inductors and fast transient response) |
| Max Output Current | 3 A continuous (with proper PCB thermal design using exposed pad to GND) |
| RDS(ON) | 100 mΩ (HSOP package; reduces conduction loss and thermal stress at full load) |
| Enable Threshold | 1.6 V (typ) with 0.6 V hysteresis (enables reliable sequencing with simple resistor dividers) |
| Quiescent Current | 3.4 mA (typ) at VFB = 5 V; 25 µA in shutdown (minimizes standby power in always-on systems) |
Pinout & Package
LM22676TJ-5.0/NOPB uses an 8-pin HSOP (PowerPAD) package with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (RθJA = 22°C/W).
| 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 |
| 2 VIN | Input supply | Primary power input (4.5–42 V); decoupled with ≥10 µF ceramic capacitor near pin |
| 3 BOOT | Bootstrap supply | Connects to SW via 10 nF ceramic capacitor; supplies gate drive for high-side MOSFET |
| 4 GND | System ground | Power and signal return; tied directly to exposed pad for thermal and electrical integrity |
| 5 EN | Enable control | Logic-level input; <1.6 V disables regulator (25 µA IQ); >2.2 V enables operation |
| 6 FB | Feedback input | Internally connected to 5 V output; no external divider required for fixed-output configuration |
| 7 NC | No connect | Thermal conductor only; must be left unconnected electrically but may be thermally coupled to GND |
| 8 NC | No connect | Thermal conductor only; same as Pin 7 - no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external bootstrap diode, reducing BOM count and layout complexity in buck topology |
| Stable with ceramic capacitors | Supports low-ESR ceramic output caps (no electrolytic required), improving reliability and lifetime |
| Internal soft-start | 500 µs fixed ramp prevents inrush current and output overshoot during power-up |
| Thermal shutdown + current limit | Protects against sustained overload or poor heatsinking; auto-recovery after cooldown |
| WEBENCH® enabled | Full design support including component selection, simulation, and thermal modeling via TI's online tool |
Applications
| Industrial PLC I/O Module | Telecom Line Card Power |
|---|---|
|
Use Scenario: Converting 24 V backplane supply to clean 5 V for FPGA configuration and interface logic. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering regulated 5 V at up to 3 A with tight line/load regulation. Use Value: High efficiency (>90%) minimizes heat in dense modules; 500 kHz switching allows small 2.2 µH inductors and low-profile 120 µF ceramic output caps. |
Use Scenario: Generating 5 V from –48 V telecom rectified rail (via intermediate 12 V stage) for Ethernet PHY and management MCU. IC Role / Device Role / Timing Role: Secondary-stage buck regulator handling wide input transients and maintaining regulation during hot-swap events. Use Value: 42 V absolute max rating withstands 12 V rail surges; precision enable supports controlled power sequencing with upstream supervisors. |
| Automotive Body Control Unit | Embedded Edge Sensor Hub |
|
Use Scenario: Deriving 5 V from 12 V battery rail for CAN transceivers and LIN controllers in under-hood ECUs. IC Role / Device Role / Timing Role: Robust power supply meeting automotive temperature range (–40°C to +125°C junction) and cold-crank immunity. Use Value: Wide 4.5–42 V input accommodates 6 V cold-crank dips and 36 V load-dump spikes; thermal pad ensures reliability at elevated ambient temperatures. |
Use Scenario: Powering ARM Cortex-M based sensor fusion node with multiple analog sensors and BLE radio from 12 V wall adapter. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete buck controller + MOSFET, reducing footprint and bill-of-materials. Use Value: Fixed 5 V output eliminates feedback resistors; integrated soft-start and enable simplify system-level power management firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22674TJ-5.0/NOPB | Same pinout, lower 2 A current rating, 120 mΩ RDS(ON), identical 5 V fixed output and 500 kHz frequency | Suitable for <2 A loads where thermal margin is constrained; not recommended for 3 A continuous duty | Select when output current requirement is ≤2 A and cost optimization is prioritized over headroom |
| TPS54340DDAR | 42 V, 3.5 A, adjustable output, 500 kHz, SO-8 package; no integrated bootstrap diode; requires external bootstrap cap/diode | Offers output adjustability and higher current capability but increases external component count and layout sensitivity | Choose when variable output voltage or >3 A peak current is required, accepting added design complexity |
Compared with LM22676TJ-5.0/NOPB, LM22674TJ-5.0/NOPB provides identical functionality at reduced current capacity, while TPS54340DDAR trades integration for flexibility-requiring external bootstrap components but enabling adjustable outputs and higher peak current.
Availability
LM22676TJ-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power conversion, and embedded sensor hub designs requiring stable component supply, long-term lifecycle support, and AEC-Q100–compatible thermal robustness.
Supply support for LM22676TJ-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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM22676 product line delivers SIMPLE SWITCHER® buck regulators targeting industrial, automotive, and telecom applications where wide-input, high-efficiency, and minimal external components are critical.
FAQ
What is the maximum input voltage rating for LM22676TJ-5.0/NOPB?
The LM22676TJ-5.0/NOPB has an absolute maximum input voltage rating of 43 V, with recommended operating range from 4.5 V to 42 V. This allows reliable operation across 12 V and 24 V industrial rails, including automotive cold-crank (down to 6 V) and load-dump (up to 36 V) conditions. Exceeding 43 V risks permanent damage per the Absolute Maximum Ratings table in the SNVS587L datasheet.
Does LM22676TJ-5.0/NOPB require external feedback resistors?
No, LM22676TJ-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 internally connected to the output, eliminating resistor selection, placement, and tolerance errors. This simplifies design and improves long-term stability compared to adjustable variants like LM22676-ADJ.
How is thermal performance managed in LM22676TJ-5.0/NOPB?
LM22676TJ-5.0/NOPB uses an HSOP PowerPAD package with an exposed thermal pad that must be soldered to a large copper pour tied to system ground. This achieves RθJA = 22°C/W, enabling 3 A continuous operation at +85°C ambient with proper PCB layout. Thermal shutdown activates at 150°C junction temperature, with automatic recovery once temperature falls below ~135°C.
Can LM22676TJ-5.0/NOPB operate with ceramic output capacitors only?
Yes, LM22676TJ-5.0/NOPB is explicitly designed to be stable with low-ESR ceramic output capacitors - no electrolytic or tantalum capacitors are required. The internal compensation and voltage-mode architecture ensure phase margin and transient response meet specifications using standard X5R/X7R 120 µF ceramics, improving reliability and reducing board area versus traditional solutions.
What is the purpose of the NC pins on LM22676TJ-5.0/NOPB?
Pins 7 and 8 on LM22676TJ-5.0/NOPB are designated NC (No Connect) - they have no internal electrical connection but serve as thermal conductors. These pins must remain unconnected electrically but should be included in the thermal pad stencil design and may be soldered to the GND plane to enhance heat transfer from the die through the package body, supporting the 22°C/W thermal performance.
LM22676TJ-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
LM22676TJ-5.0/NOPB FAQ
1.How can I place an order for LM22676TJ-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22676TJ-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 LM22676TJ-5.0/NOPB reliable?
The price and inventory of LM22676TJ-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 LM22676TJ-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22676TJ-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22676TJ-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22676TJ-5.0/NOPB?
LM22676TJ-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22676TJ-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 LM22676TJ-5.0/NOPB?
For technical support, including LM22676TJ-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22676TJ-5.0/NOPB requirements.
6.How does Aetrix verify that LM22676TJ-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22676TJ-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 LM22676TJ-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22676TJ-5.0/NOPB?
All LM22676TJ-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22676TJ-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 LM22676TJ-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22676TJ-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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