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LM2597MX-12/NOPB
Texas Instruments
IC REG BUCK 12V 500MA 8SOIC
4004 Pcs New Original In Stock
Buck Switching Regulator IC Positive Fixed 12V 1 Output 500mA 8-SOIC (0.154", 3.90mm Width)
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5.0 / 5.0
- (89 Ratings)
LM2597MX-12/NOPB
Product Overview
1468051
DiGi Electronics Part Number
LM2597MX-12/NOPB-DGManufacturer
Texas Instruments
LM2597MX-12/NOPB
Description
IC REG BUCK 12V 500MA 8SOICInventory
4004 Pcs New Original In Stock
Buck Switching Regulator IC Positive Fixed 12V 1 Output 500mA 8-SOIC (0.154", 3.90mm Width)
Quantity
Minimum 1
Minimum 1
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LM2597MX-12/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Tape & Reel (TR)
Series
SIMPLE SWITCHER®
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)
40V
Voltage - Output (Min/Fixed)
12V
Voltage - Output (Max)
-
Current - Output
500mA
Frequency - Switching
150kHz
Synchronous Rectifier
No
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
LM2597
Datasheet & Documents
Manufacturer Product Page
LM2597MX-12/NOPB Specifications
HTML Datasheet
LM2597MX-12/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LM2597MX-12/NOPB-DG
296-38097-6
LM2597MX-12-NDR
296-38097-2
296-38097-1
-296-38097-1-DG
Standard Package
2,500
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Die Plattform ist effizient, sicher und sehr benutzerfreundlich.
Dec 02, 2025
Tolle Organisation bei der Lieferung. Mein Paket kam in einem tadellosen Zustand und termingerecht.
Dec 02, 2025
DiGi Electronics’ commitment to quality is evident in their meticulously designed products.
Dec 02, 2025
DiGi Electronics makes green choices accessible through their pricing and packaging.
Dec 02, 2025
Their green packaging initiatives set them apart.
Dec 02, 2025
Outstanding delivery speed! I received my order within just a few days.
Dec 02, 2025
My order arrived in perfect condition and much earlier than expected.
Dec 02, 2025
I greatly appreciate DiGi's prompt responses to any after-sales inquiries.
Dec 02, 2025
DiGi Electronics always provides products that meet strict quality standards, which is critical for my work.
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Frequently Asked Questions (FAQ)
What are the key design risks when using the LM2597MX-12/NOPB in high-vibration industrial environments, and how can layout and component selection mitigate failure modes?
The LM2597MX-12/NOPB, while robust with an operating temperature range of -40°C to 125°C, is susceptible to mechanical stress in high-vibration settings due to its 8-SOIC package and reliance on external passive components. Poor PCB mounting or inadequate strain relief on input/output capacitors can lead to solder joint fatigue or capacitor cracking. To mitigate this, use conformal coating, secure bulk capacitors with adhesive, and avoid placing heavy components near the regulator. Additionally, select MLCCs with flexible terminations and ensure the PCB is rigidly mounted. Always validate mechanical robustness through shock and vibration testing per IEC 60068-2 standards.
Can the LM2597MX-12/NOPB safely replace a legacy LM2576HVT-12 in a 24V-to-12V automotive application, and what derating or thermal considerations are critical?
While both the LM2597MX-12/NOPB and LM2576HVT-12 are 12V fixed-output buck regulators, direct replacement is not recommended without thermal reassessment. The LM2597MX-12/NOPB has a lower max input voltage (40V vs. 60V for the LM2576HVT-12) and reduced efficiency at high input voltages due to its 150kHz switching frequency and non-synchronous design. At 24V input and 500mA load, power dissipation increases significantly, risking thermal shutdown. You must recalculate junction temperature using the 8-SOIC package’s θJA (~80°C/W) and consider adding a heatsink or airflow. For sustained 24V operation, evaluate upgrading to a more efficient synchronous converter like the TPS54302.
How does the absence of synchronous rectification in the LM2597MX-12/NOPB impact efficiency and thermal performance in battery-powered systems, and when should it be avoided?
The LM2597MX-12/NOPB uses a diode-based output stage instead of synchronous rectification, which results in higher conduction losses—especially at low input-to-output differentials or light loads. In battery-powered applications where efficiency below 1A is critical, this can reduce runtime by 10–15% compared to modern synchronous alternatives like the LM2675-12 or TPS56221. Avoid the LM2597MX-12/NOPB in ultra-low-power designs or when input voltage is close to 12V (e.g., 14V from a lead-acid battery). Instead, opt for a synchronous buck with pulse-skipping mode to maintain high efficiency across the load range.
What are the risks of paralleling multiple LM2597MX-12/NOPB devices to increase output current beyond 500mA, and why is it generally not recommended?
Paralleling LM2597MX-12/NOPB units to exceed the 500mA rated output current introduces significant current-sharing imbalance due to lack of synchronization and feedback loop interaction. Even minor variations in feedback thresholds or layout parasitics cause one regulator to carry disproportionate load, leading to thermal runaway and premature failure. Additionally, the fixed-frequency 150kHz operation of each device may beat against others, creating audible noise or EMI issues. Instead of paralleling, migrate to a higher-current monolithic solution such as the LM25119 (2A) or use a master-slave controller architecture with current-sharing circuitry.
When replacing a failed LM2597MX-12/NOPB in a medical device design, how do you ensure long-term reliability and compliance, given its MSL-1 rating and RoHS3 status?
Although the LM2597MX-12/NOPB is MSL-1 (unlimited floor life) and RoHS3 compliant—beneficial for medical manufacturing—long-term reliability hinges on derating, environmental controls, and supply chain diligence. In medical applications, operate the device below 80% of its max input voltage (≤32V) and 70% of its current rating (≤350mA) to extend MTBF. Verify that your CEM follows IPC-610 Class 3 assembly standards and perform HALT (Highly Accelerated Life Testing) during qualification. Always source from authorized distributors like Digi-Key or Mouser to avoid counterfeit parts, and maintain full traceability per ISO 13485 requirements.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LM2597MX-12/NOPB CAD Models
Texas Instruments LM2597MX-12/NOPB PCB symbols & footprints
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