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LM22680MRX-ADJ/NOPB
Texas Instruments
IC REG BUCK ADJ 2A 8SOPWR
37761 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1.285V 1 Output 2A 8-PowerSOIC (0.154", 3.90mm Width)
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5.0 / 5.0
- (229 Ratings)
LM22680MRX-ADJ/NOPB
Product Overview
1299521
DiGi Electronics Part Number
LM22680MRX-ADJ/NOPB-DGManufacturer
Texas Instruments
LM22680MRX-ADJ/NOPB
Description
IC REG BUCK ADJ 2A 8SOPWRInventory
37761 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1.285V 1 Output 2A 8-PowerSOIC (0.154", 3.90mm Width)
Quantity
Minimum 1
Minimum 1
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LM22680MRX-ADJ/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Cut Tape (CT) & Digi-Reel®
Series
SIMPLE SWITCHER®
Product Status
Active
Function
Step-Down
Output Configuration
Positive
Topology
Buck
Output Type
Adjustable
Number of Outputs
1
Voltage - Input (Min)
4.5V
Voltage - Input (Max)
42V
Voltage - Output (Min/Fixed)
1.285V
Voltage - Output (Max)
37V
Current - Output
2A
Frequency - Switching
500kHz
Synchronous Rectifier
No
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
8-PowerSOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SO PowerPad
Base Product Number
LM22680
Datasheet & Documents
Manufacturer Product Page
LM22680MRX-ADJ/NOPB Specifications
HTML Datasheet
LM22680MRX-ADJ/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LM22680MRX-ADJ
LM22680MRX-ADJ/NOPB-DG
296-41287-6
LM22680MRX-ADJ-DG
296-41287-2
296-41287-1
Standard Package
2,500
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
DiGi Electronics provides lightning-fast shipping, ensuring my orders arrive within the promised timeframe every time.
de desembre 02, 2025
Their affordable prices and sustainable packaging make every purchase worthwhile.
de desembre 02, 2025
I liked the detailed product descriptions that helped me make informed decisions.
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Frequently Asked Questions (FAQ)
What are the key thermal design considerations when using the LM22680MRX-ADJ/NOPB in a high-ambient-temperature industrial enclosure with limited airflow?
The LM22680MRX-ADJ/NOPB relies on its PowerPad package for heat dissipation, so proper PCB thermal design is critical—especially above 85°C ambient. You must connect the exposed pad to a large copper pour (minimum 1 in²) on the top layer and use multiple thermal vias to inner ground planes. Without adequate copper area or airflow, junction temperature can exceed 125°C under full 2A load, triggering thermal shutdown. For industrial enclosures, consider derating output current by 20–30% above 70°C ambient and validate thermal performance with infrared imaging or thermocouples during prototyping.
Can I replace the LM22680MRX-ADJ/NOPB with a cheaper buck regulator like the MP2307DN in a 12V-to-3.3V, 2A application, and what risks should I evaluate?
While the MP2307DN offers similar input voltage and current ratings, direct replacement of the LM22680MRX-ADJ/NOPB introduces several risks: the MP2307DN uses synchronous rectification but operates at 340kHz, which may interfere with sensitive analog circuits in your design. More critically, the MP2307DN has a narrower operating temperature range (−40°C to +85°C vs. −40°C to +125°C for the LM22680MRX-ADJ/NOPB), making it unsuitable for automotive or industrial applications near thermal limits. Additionally, the MP2307DN lacks the LM22680MRX-ADJ/NOPB’s robust enable/shutdown sequencing and tighter line/load regulation—verify BOM cost savings don’t compromise long-term reliability or EMI performance.
How do I ensure stable operation of the LM22680MRX-ADJ/NOPB when powering noise-sensitive RF or precision ADC circuits from a shared 24V bus?
To minimize output noise and ripple when using the LM22680MRX-ADJ/NOPB for RF or ADC rails, implement a two-stage filtering approach: first, use a low-ESR ceramic output capacitor (≥22µF, X7R) close to the regulator, followed by a secondary LC filter (e.g., 10µH inductor + 10µF capacitor) before the sensitive load. Also, route the feedback trace away from switching nodes and use a ground plane under the IC to reduce loop area. Since the LM22680MRX-ADJ/NOPB operates at 500kHz, ensure your system’s sensitive frequencies aren’t harmonically related—consider adding a ferrite bead if conducted emissions exceed limits. Always validate PSRR at your target frequency during EMC testing.
Is the LM22680MRX-ADJ/NOPB suitable for battery-powered applications requiring low quiescent current, and how does it compare to alternatives like the TPS62130?
The LM22680MRX-ADJ/NOPB is not ideal for battery-powered systems due to its relatively high quiescent current (~3mA typical), which significantly impacts runtime in always-on or sleep-mode applications. In contrast, the TPS62130 from Texas Instruments draws only 15µA in light-load mode and supports automatic PFM/PWM switching, making it far more efficient for battery use. If you're designing for portable or IoT devices, the power savings from the TPS62130 typically outweigh the LM22680MRX-ADJ/NOPB’s advantages in input voltage range and simplicity. Reserve the LM22680MRX-ADJ/NOPB for line-powered or high-input-voltage scenarios where efficiency at full load matters more than standby consumption.
What layout practices are essential to prevent instability or excessive EMI when designing with the LM22680MRX-ADJ/NOPB in a densely populated PCB?
For stable and low-noise operation of the LM22680MRX-ADJ/NOPB, adhere to a compact, star-ground layout: keep the input capacitor within 5mm of VIN and GND pins, place the bootstrap capacitor adjacent to BOOT and SW pins, and minimize the SW node copper area to reduce radiated emissions. Use a single-point ground connection between the PowerPad and system ground plane to avoid ground loops. Avoid routing high-speed digital signals beneath the regulator, and ensure the feedback network (R1/R2) is isolated from switching currents—place it near the FB pin with short, direct traces. Following these practices prevents oscillation, reduces EMI, and ensures the LM22680MRX-ADJ/NOPB meets conducted emissions standards like CISPR 25.
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LM22680MRX-ADJ/NOPB CAD Models
Texas Instruments LM22680MRX-ADJ/NOPB PCB symbols & footprints
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