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Texas Instruments LM22673TJE-5.0/NOPB
- Part No.:
- LM22673TJE-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22673TJE-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:1,048
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Product details
Overview
LM22673TJE-5.0/NOPB from Texas Instruments is a 42 V, 3 A synchronous step-down DC/DC regulator in 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 rails converting 12 V or 24 V input to stable 5 V for microcontroller cores and peripheral logic.
For engineers reviewing the LM22673TJE-5.0/NOPB datasheet, LM22673TJE-5.0/NOPB pinout, LM22673TJE-5.0/NOPB application, or LM22673TJE-5.0/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance in HSOP-8 exposed-pad package, adjustable current limit via IADJ pin, soft-start timing control, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The LM22673TJE-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 120 mΩ N-channel MOSFET switch and uses a bootstrap capacitor between BOOT and SW pins to drive the high-side gate. Minimum on-time (100 ns) and off-time (200 ns) constraints define practical VIN/VOUT conversion ratios and require ≥5 mA minimum load for reliable boot-cap recharge.
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 and automotive battery transients. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider; enables plug-and-play 5 V supply for USB peripherals or logic interfaces. |
| Max Output Current | 3 A - sustains full load without derating at TJ ≤ 125°C with proper PCB copper area under exposed pad. |
| Switching Frequency | 500 kHz - enables compact 2.2 µH–4.7 µH inductors and <10 µF ceramic output capacitance. |
| RDS(ON) | 120 mΩ (PFM package) - defines conduction loss at 3 A; contributes to >90% peak efficiency at mid-load. |
| Operating Junction Temp | –40°C to +125°C - qualified for extended industrial and automotive under-hood environments. |
| Soft-Start Time | Adjustable via SS pin capacitor - default ~500 µs; extended to >10 ms with 1 µF external cap for inrush control. |
Pinout & Package
LM22673TJE-5.0/NOPB is housed in an HSOP-8 PowerPAD package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (RθJA = 60°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Power Input | Primary DC input (4.5–42 V); requires local 10 µF ceramic bypass near pin. |
| SW (Pin 1) | Switch Node | Drives external inductor; swings from GND to VIN; requires tight layout to minimize EMI. |
| BOOT (Pin 3) | Bootstrap Supply | Connects to SW via 10 nF ceramic capacitor; supplies gate drive for internal high-side MOSFET. |
| FB (Pin 6) | Feedback Input | Internally connected to 5 V reference; tied directly to output for fixed 5 V operation. |
| GND (Pin 4) | Ground Reference | Analog and power ground; must be low-impedance connection to PCB ground plane. |
| SS (Pin 7) | Soft-Start Control | Sinks 50 µA current; RC time constant sets output ramp rate during startup. |
| IADJ (Pin 5) | Current Limit Adjust | Resistor-to-GND sets peak switch current from default 4.2 A down to ~1.5 A. |
| Exposed Pad | Thermal & Electrical Ground | Mandatory solder connection to PCB ground pour; primary path for heat removal. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Diode | Eliminates external bootstrap diode; reduces BOM count and layout area in buck topology. |
| Adjustable Current Limit | Single resistor from IADJ to GND scales peak switch current-enables design margining and smaller magnetics. |
| Stable with Ceramic Capacitors | No ESR requirement; supports low-profile, high-reliability 10–22 µF X5R/X7R MLCCs at output. |
| UVLO with Hysteresis | Turns on at 4.3 V, shuts down at 3.9 V-prevents erratic operation during brownout or cold-cranking. |
| Thermal Shutdown | Activates at 150°C junction temperature; auto-restarts after cooldown to ~135°C-protects against sustained overload. |
Applications
| Industrial PLC I/O Module | Telecom Line Card Power |
|---|---|
Use Scenario: Regulating 24 V backplane to clean 5 V for isolated digital I/O drivers and ADC references. IC Role / Device Role / Timing Role: Primary non-isolated buck converter delivering regulated 5 V rail with fast transient response to step-load changes. Use Value: Maintains ±1.5% output accuracy over –40°C to +85°C ambient; RDS(ON) and 500 kHz switching minimize thermal footprint in dense module layouts. | Use Scenario: Converting -48 V telecom supply (via intermediate 12 V stage) to 5 V for FPGA configuration and management ICs. IC Role / Device Role / Timing Role: Secondary buck regulator accepting 12 V input to generate low-noise 5 V for sensitive digital logic. Use Value: Adjustable soft-start prevents inrush into downstream capacitive loads; UVLO ensures graceful shutdown during input sag. |
| Automotive Body Control Unit | Embedded Edge Sensor Hub |
Use Scenario: Deriving 5 V from vehicle battery (9–16 V nominal, up to 42 V load dump) for microcontroller, CAN transceiver, and sensor interface. IC Role / Device Role / Timing Role: Main system power supply with integrated protection against reverse polarity, overvoltage, and thermal fault. Use Value: AEC-Q100 Grade 1 qualification (–40°C to +125°C) and 42 V absolute max rating ensure robustness in automotive environments. | Use Scenario: Powering ARM Cortex-M based sensor fusion node with BLE radio, IMU, and environmental sensors from single-cell Li-ion or 12 V wall adapter. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator enabling >90% efficiency at 100 mA–2 A load range. Use Value: Low quiescent current (3.4 mA typical) extends battery life; ceramic-capacitor stability simplifies layout in space-constrained PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22674TJE-5.0/NOPB | Same pinout, 500 kHz, but rated for 4 A output and higher RDS(ON) tolerance (100 mΩ SO vs 120 mΩ PFM). | Supports higher continuous load; better suited for 3.5–4 A applications with thermal headroom. | Select when >3 A sustained current or lower thermal resistance (SO PowerPAD) is required. |
| TPS54340DDAR | 42 V, 3.5 A, 500 kHz; external compensation; no integrated bootstrap diode; requires external bootstrap diode. | Greater loop tuning flexibility but increased component count; wider VIN range (4.5–42 V same). | Choose when custom compensation or tighter output ripple spec demands external loop control. |
Compared with LM22674TJE-5.0/NOPB, the LM22673TJE-5.0/NOPB offers identical functionality at lower cost and smaller thermal pad, while TPS54340DDAR trades integration for design flexibility-neither is pin-compatible, requiring layout revision.
Availability
LM22673TJE-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power systems, and automotive body electronics requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM22673TJE-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 company designing analog ICs, embedded processors, and power management solutions for industrial, automotive, and communications markets.
The LM22673 product line delivers SIMPLE SWITCHER® buck regulators with integrated high-side FETs and internal compensation-designed for rapid, reliable power supply implementation in space- and cost-constrained applications.
FAQ
What is the maximum input voltage rating for LM22673TJE-5.0/NOPB?
The LM22673TJE-5.0/NOPB has an absolute maximum input voltage of 43 V, with recommended operating range from 4.5 V to 42 V. Exceeding 42 V continuously risks violating safe operating area limits, especially under high ambient temperature or heavy load conditions where internal power dissipation increases.
Does LM22673TJE-5.0/NOPB require an external feedback resistor divider?
No. The LM22673TJE-5.0/NOPB features a factory-trimmed internal feedback network set for 5.0 V output. The FB pin is internally connected to this reference and must be tied directly to the output node-no external resistors are needed or permitted for basic operation.
How is current limit adjusted on LM22673TJE-5.0/NOPB?
Current limit is adjusted by connecting a resistor between the IADJ pin and GND. With no resistor, the default peak switch current is 4.2 A (typ). A 10 kΩ resistor sets ~2.5 A, and a 100 kΩ resistor reduces it to ~1.5 A. Accuracy degrades to ±35%/–25% when adjusted, per datasheet specifications.
What thermal pad requirements apply to LM22673TJE-5.0/NOPB?
The exposed thermal pad of LM22673TJE-5.0/NOPB must be soldered to a solid copper ground plane with ≥4 thermal vias (0.3 mm diameter) connecting to inner/ground layers. TI specifies RθJA = 60°C/W for HSOP-8; inadequate pad area or via count will cause junction temperature to exceed 125°C at full 3 A load.
Can LM22673TJE-5.0/NOPB operate with ceramic output capacitors only?
Yes. LM22673TJE-5.0/NOPB is explicitly characterized and stabilized for use with low-ESR ceramic capacitors (e.g., 10–22 µF X5R/X7R). Unlike older controllers, it does not require added ESR for phase margin-enabling smaller, more reliable, and lower-profile output filtering.
LM22673TJE-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
LM22673TJE-5.0/NOPB FAQ
1.How can I place an order for LM22673TJE-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22673TJE-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 LM22673TJE-5.0/NOPB reliable?
The price and inventory of LM22673TJE-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 LM22673TJE-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22673TJE-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22673TJE-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22673TJE-5.0/NOPB?
LM22673TJE-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22673TJE-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 LM22673TJE-5.0/NOPB?
For technical support, including LM22673TJE-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22673TJE-5.0/NOPB requirements.
6.How does Aetrix verify that LM22673TJE-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22673TJE-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 LM22673TJE-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22673TJE-5.0/NOPB?
All LM22673TJE-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22673TJE-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 LM22673TJE-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22673TJE-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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