LM22673TJ-ADJ Texas Instruments In Stock
LM22673TJ-ADJ is an adjustable-output, 3 A peak, 500 kHz synchronous buck switching regulator by Texas Instruments. Key specs: 3 V to 42 V input range, 500 kHz switching frequency, adjustable output via external resistors. Available in a TO-263-7 package with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM22673TJ-ADJ?
- Wide 3 V to 42 V input range covers automotive 12 V/24 V and industrial 24 V/36 V rail designs
- 3 A peak output current in a compact TO-263-7 (D2PAK) power package for efficient heat sinking
- 500 kHz fixed switching frequency allows smaller external inductors and capacitors, reducing BOM cost
- Adjustable output voltage set by two external resistors, enabling flexible regulation from below 1 V up to the input rail
- Internal compensation and soft-start simplify design and reduce external component count
What is LM22673TJ-ADJ used for?
LM22673TJ-ADJ is used in industrial power supplies, motor drive control boards, and 12 V automotive point-of-load regulators where a wide input range of 3 V to 42 V and a 3 A peak output are needed. Its adjustable output makes it suitable for powering FPGAs, DSPs, and mixed-signal processors from a single switching stage. The TO-263-7 surface-mount package provides good thermal performance on standard FR4 PCBs without an external heat sink in many applications.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for LM22673TJ-ADJ?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does LM22673TJ-ADJ support, and does it work in a 24 V industrial system?
LM22673TJ-ADJ accepts an input voltage from 3 V to 42 V, which comfortably covers 24 V industrial rails as well as 12 V automotive and 36 V telecom buses. This wide range means the same design can be reused across multiple platform voltages without redesigning the power stage.
How is the output voltage of LM22673TJ-ADJ set, and what is the minimum achievable output?
The output voltage is set by a resistor divider from VOUT to the FB pin, with a reference threshold of 1.285 V. Using standard 1% resistors, designers can dial in any output from approximately 1.285 V up to just below the input voltage, giving full flexibility for core voltages like 1.0 V, 1.8 V, 2.5 V, or 3.3 V from a 12 V bus.
What is the switching frequency of LM22673TJ-ADJ and how does it affect inductor selection?
The device switches at a fixed 500 kHz, which allows the use of inductors in the 4.7 µH to 22 µH range for typical 3 A load conditions. Higher frequency operation compared to 200 kHz alternatives results in smaller inductor physical size and lower total solution height on the PCB.
What package does LM22673TJ-ADJ come in and how does this affect thermal management at 3 A output?
LM22673TJ-ADJ is housed in a 7-lead TO-263 (D2PAK) surface-mount package with an exposed thermal tab that bonds directly to a copper pour on the PCB. At 3 A continuous output current, the tab-down mounting to a 1 oz copper pour of approximately 645 mm² typically keeps junction temperature below 125°C in a 70°C ambient environment.
When is LM22673TJ-ADJ a practical alternative to LM22673TJ-5.0 in a 5 V point-of-load design?
LM22673TJ-5.0 has a fixed 5 V output, which simplifies BOM when 5 V is the only rail needed. LM22673TJ-ADJ becomes the better choice when the system requires a non-standard output such as 3.3 V, 2.5 V, or 1.8 V, or when one regulator design must cover multiple board variants at different output voltages by simply changing two resistor values.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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