My Inquiry
My Account
Texas Instruments LM22673QTJ-5.0/NOPB
- Part No.:
- LM22673QTJ-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22673QTJ-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:2,912
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM22673QTJ-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 internal voltage-mode compensation. 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 LM22673QTJ-5.0/NOPB datasheet, LM22673QTJ-5.0/NOPB pinout, LM22673QTJ-5.0/NOPB application, or LM22673QTJ-5.0/NOPB equivalent, key selection considerations include input voltage range (4.5–42 V), thermal performance in HSOP-8 exposed-pad package, adjustable current limit via IADJ pin, integrated bootstrap diode, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The LM22673QTJ-5.0/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain across wide VIN variations. Its internal Type III compensation network is optimized for fixed 5 V output, eliminating external compensation components.
It integrates a 120 mΩ N-channel MOSFET switch, supports adjustable soft-start via external capacitor on SS pin, and includes undervoltage lockout (UVLO) with 4.3 V rising threshold. Thermal shutdown activates at 150°C junction temperature with hysteresis down to 135°C.
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 feedback resistor divider, reduces BOM count and layout sensitivity |
| Max Output Current | 3 A - sufficient for powering multiple MCU cores, FPGAs, or peripheral ICs simultaneously |
| 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) - minimizes conduction loss at full load; junction-to-ambient RθJA = 22°C/W |
| Soft-Start Time | Adjustable via SS pin capacitor - default ~500 µs; extended up to ~10 ms with 1 µF capacitor for inrush control |
| Operating Junction Temp | –40°C to +125°C - qualified for extended industrial and automotive under-hood environments |
Pinout & Package
LM22673QTJ-5.0/NOPB uses an HSOP-8 PowerPAD (exposed pad) package measuring 4.89 mm × 3.90 mm. The exposed thermal pad must be soldered to a PCB copper pour connected to GND for optimal thermal performance (RθJA = 22°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Power Input | Primary DC input supply (4.5–42 V); requires local 10 µF ceramic bypass capacitor |
| SW (Pin 1) | Switch Node | Drives external power inductor; swings from GND to VIN; high dV/dt node requiring tight layout |
| 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 tied to 5 V reference; connect directly to output for fixed 5 V operation |
| GND (Pin 4) | Ground Reference | Analog and power ground return; tie to exposed pad and system GND plane |
| SS (Pin 7) | Soft-Start Control | Sinks 50 µA current; RC time constant sets output ramp rate; floating = default 500 µs |
| IADJ (Pin 5) | Current Limit Adjust | Resistor-to-GND sets peak switch current from 1.5 A to 4.2 A; open = 4.2 A typical |
| EP (Exposed Pad) | Thermal & Electrical Ground | Mandatory GND connection; primary thermal path; improves power dissipation by >50% |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Diode | Eliminates external bootstrap diode; reduces component count and layout complexity in buck topology |
| Stable with Ceramic Capacitors | Supports low-ESR X7R/X5R ceramics ≥4.7 µF at output; avoids costly tantalum or electrolytic alternatives |
| Adjustable Current Limit | Single resistor from IADJ to GND scales peak switch current - enables optimization for lower-current applications |
| WEBENCH® Enabled | Fully supported in TI's WEBENCH Power Designer for automated BOM generation, thermal simulation, and loop stability analysis |
| Internal UVLO | 4.3 V turn-on / 3.9 V turn-off thresholds prevent erratic startup during brownout or cold-cranking conditions |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Regulating 24 V vehicle battery to clean 5 V for microcontroller, CAN transceivers, and sensor interfaces in door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary 5 V point-of-load regulator; provides stable rail independent of battery fluctuations from 9 V to 16 V. Use Value: Delivers 3 A continuous current with <1% line regulation over 9–16 V input; thermal shutdown prevents latch-up during short-circuit faults. | Use Scenario: Converting 12 V chassis supply to 5 V for programmable logic controllers handling analog I/O, relay drivers, and HMI communication. IC Role / Device Role / Timing Role: Fixed-output buck converter supplying isolated 5 V domain for digital logic and ADC references. Use Value: Operates reliably from –40°C to +125°C ambient; 500 kHz switching enables small magnetics for space-constrained DIN-rail enclosures. |
| Telecom Remote Radio Unit | Medical Infusion Pump Controller |
Use Scenario: Deriving 5 V from 48 V intermediate bus to power FPGA configuration, Ethernet PHY, and monitoring circuitry in outdoor base stations. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator supporting wide-range telecom supply standards. Use Value: 42 V absolute max rating tolerates 48 V transients per IEEE 802.3af; 90%+ efficiency reduces thermal load in sealed RF enclosures. | Use Scenario: Generating certified 5 V rail for safety-critical MCU, display driver, and motor control logic in Class II medical devices. IC Role / Device Role / Timing Role: Isolated secondary-side regulator ensuring precise voltage for fault-tolerant subsystems. Use Value: ±1.5% output accuracy meets IEC 60601-1 tolerance requirements; soft-start prevents inrush-induced reset events during power-up. |
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 architecture but TO-263-7 package; RθJA = 60°C/W vs 22°C/W; higher thermal resistance limits continuous 3 A output | Preferred where board height >2.5 mm is acceptable and heatsinking via mounting hole is feasible | Select when mechanical constraints favor through-hole mounting or when legacy TO-263 footprint exists |
| TPS54340DDAR | 42 V, 3.5 A buck; 3.5 MHz switching; no integrated bootstrap diode; requires external high-side gate driver components | Better suited for ultra-compact designs needing <1 µH inductors; higher quiescent current (146 µA vs 3.4 mA) | Choose for high-frequency, low-inductance designs where layout area is critical and external bootstrap is acceptable |
Compared with LM22674TJ-5.0/NOPB, the LM22673QTJ-5.0/NOPB offers superior thermal performance in a smaller footprint, enabling full 3 A output without derating. Against TPS54340DDAR, it trades higher frequency for simpler design, integrated bootstrap, and lower IQ - ideal for cost-sensitive industrial systems where 500 kHz ripple is acceptable.
Availability
LM22673QTJ-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, automotive body electronics, and telecom power conversion requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LM22673QTJ-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 LM22673 product line delivers SIMPLE SWITCHER® step-down regulators designed for rugged, easy-to-use DC/DC conversion in harsh environments - emphasizing minimal external components, internal compensation, and robust thermal protection.
FAQ
What is the maximum input voltage rating for LM22673QTJ-5.0/NOPB?
The LM22673QTJ-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 direct regulation from standard 12 V, 24 V, and 48 V industrial and automotive supply rails while maintaining margin against transients. Exceeding 42 V continuously may trigger thermal shutdown or reduce lifetime reliability.
Does LM22673QTJ-5.0/NOPB require external compensation components?
No, the LM22673QTJ-5.0/NOPB features fully internal Type III voltage-mode compensation optimized for its fixed 5 V output configuration. No external resistors or capacitors are needed on the FB pin or elsewhere to ensure stability across the full load and input voltage range - simplifying design and reducing BOM count.
How is the current limit adjusted on LM22673QTJ-5.0/NOPB?
The LM22673QTJ-5.0/NOPB current limit is set by connecting a resistor between the IADJ pin and GND. With IADJ open, the default peak switch current is 4.2 A (typ). A 10 kΩ resistor reduces it to ~1.5 A; values from 1 kΩ to 100 kΩ scale the limit linearly per Figure 12 in the datasheet. Accuracy degrades to ±35%/–25% when adjusted.
Can LM22673QTJ-5.0/NOPB operate with ceramic output capacitors only?
Yes, the LM22673QTJ-5.0/NOPB is explicitly characterized and stable with low-ESR ceramic capacitors ≥4.7 µF at the output. Unlike many older buck regulators, it does not require bulk electrolytic or tantalum capacitors - enabling smaller, more reliable, and longer-life power stages in space-constrained applications.
What thermal pad connection is required for LM22673QTJ-5.0/NOPB?
The exposed thermal pad (EP) of the LM22673QTJ-5.0/NOPB must be soldered to a dedicated GND copper pour on the PCB. At least 4 thermal vias (0.3 mm diameter) connecting the pad to inner-layer GND planes are recommended. This achieves the specified RθJA = 22°C/W and prevents thermal shutdown under 3 A continuous load at +85°C ambient.
LM22673QTJ-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
LM22673QTJ-5.0/NOPB FAQ
1.How can I place an order for LM22673QTJ-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22673QTJ-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 LM22673QTJ-5.0/NOPB reliable?
The price and inventory of LM22673QTJ-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 LM22673QTJ-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22673QTJ-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22673QTJ-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22673QTJ-5.0/NOPB?
LM22673QTJ-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22673QTJ-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 LM22673QTJ-5.0/NOPB?
For technical support, including LM22673QTJ-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22673QTJ-5.0/NOPB requirements.
6.How does Aetrix verify that LM22673QTJ-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22673QTJ-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 LM22673QTJ-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22673QTJ-5.0/NOPB?
All LM22673QTJ-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22673QTJ-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 LM22673QTJ-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22673QTJ-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22673QTJ-5.0/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
