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LM5019SDX/NOPB
Texas Instruments
IC REG BUCK ADJ 100MA 8WSON
69222 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1.225V 1 Output 100mA 8-WDFN Exposed Pad
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5.0 / 5.0
- (304 Ratings)
LM5019SDX/NOPB
Product Overview
1294422
DiGi Electronics Part Number
LM5019SDX/NOPB-DGManufacturer
Texas Instruments
LM5019SDX/NOPB
Description
IC REG BUCK ADJ 100MA 8WSONInventory
69222 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1.225V 1 Output 100mA 8-WDFN Exposed Pad
Quantity
Minimum 1
Minimum 1
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LM5019SDX/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
-
Series
-
Product Status
Active
Function
Step-Down
Output Configuration
Positive
Topology
Buck
Output Type
Adjustable
Number of Outputs
1
Voltage - Input (Min)
7.5V
Voltage - Input (Max)
100V
Voltage - Output (Min/Fixed)
1.225V
Voltage - Output (Max)
90V
Current - Output
100mA
Frequency - Switching
Adj to 1MHz
Synchronous Rectifier
Yes
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
8-WDFN Exposed Pad
Supplier Device Package
8-WSON (4x4)
Base Product Number
LM5019
Datasheet & Documents
Manufacturer Product Page
LM5019SDX/NOPB Specifications
HTML Datasheet
LM5019SDX/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
-296-44116-1
296-44116-6
LM5019SDX/NOPB-DG
-296-44116-1-DG
296-44116-2
296-44116-1
Standard Package
4,500
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Je recommande vivement DiGi Electronics pour leur support après-vente professionnel et leur logistique performante.
de desembre 02, 2025
Customer support from DiGi Electronics is fast, friendly, and very helpful.
de desembre 02, 2025
Their prompt responses and reliable support have made a positive impact on our workflow.
de desembre 02, 2025
Their prompt shipping allows us to meet urgent project deadlines effortlessly.
de desembre 02, 2025
My order was delivered promptly with exceptional packaging that kept everything intact.
de desembre 02, 2025
The speed and efficiency of their service keep my trust and loyalty intact.
de desembre 02, 2025
Quick delivery and helpful support are hallmarks of DiGi Electronics.
de desembre 02, 2025
High-quality materials and fast delivery—what more could I ask for?
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Frequently Asked Questions (FAQ)
What are the critical layout considerations when designing a PCB with the LM5019SDX/NOPB to ensure stable operation and avoid oscillations in high-voltage buck applications?
When using the LM5019SDX/NOPB in high-voltage step-down designs (e.g., 48V to 5V), proper PCB layout is essential to prevent instability and EMI issues. Minimize the loop area of the high-current switching path by placing the input capacitor, inductor, and SW node as close as possible to the IC. Ensure the exposed thermal pad is soldered directly to a solid ground plane with multiple vias to improve heat dissipation and reduce ground impedance. Avoid routing sensitive feedback traces near the inductor or SW node to prevent noise coupling. A poor layout can cause subharmonic oscillation or excessive ripple, especially near the 7.5V minimum input threshold. Following TI’s recommended layout in the LM5019 datasheet evaluation module significantly reduces risk in industrial or automotive environments.
Can the LM5019SDX/NOPB safely replace the LM5007 in a 48V industrial power supply design, and what design changes are required?
The LM5019SDX/NOPB can replace the LM5007 in many 48V applications due to its higher 100V input rating and integrated synchronous rectifier, but key differences require attention. Unlike the LM5007, the LM5019SDX/NOPB operates at a lower maximum output current (100mA vs. 750mA), so it's only suitable for low-power loads. Additionally, the LM5019 uses an adjustable switching frequency up to 1MHz, allowing smaller inductors but requiring careful compensation network design. You must re-tune the feedback resistors and output capacitor selection to maintain stability. Also, verify that your existing thermal management supports the 8-WSON package’s thermal characteristics. This substitution works well in sensor or control circuitry but is not viable for higher-current motor or communication interfaces.
How does the LM5019SDX/NOPB perform under wide input voltage transients, such as load dumps in automotive 12V systems, and what protection circuitry is recommended?
The LM5019SDX/NOPB is rated for up to 100V input, making it resilient to typical automotive load dump events (which can reach 40–60V), but sustained overvoltage beyond 100V can damage the device. For robust operation in 12V automotive systems, include a TVS diode (e.g., SMAJ58A) at the input to clamp transients and a series input fuse or PTC resistor to limit inrush current. Additionally, use a low-ESR ceramic input capacitor rated for at least 100V to handle high-frequency ripple. Without these protections, voltage spikes during load dump or jump-start scenarios may exceed the absolute maximum rating, leading to premature failure—especially in cold crank conditions where input voltage dips below 7.5V could cause dropout.
What are the reliability risks of operating the LM5019SDX/NOPB near its maximum junction temperature of 125°C in an enclosed industrial enclosure with poor airflow?
Operating the LM5019SDX/NOPB near 125°C junction temperature in a sealed enclosure significantly increases the risk of thermal runaway and long-term degradation. Although the device is rated for -40°C to 125°C, sustained operation above 105°C reduces mean time between failures (MTBF) due to electromigration and package stress. The 8-WSON exposed pad helps, but without adequate copper area or airflow, thermal resistance (θJA) can exceed 40°C/W, causing rapid temperature rise even at 100mA load. To mitigate this, increase the copper pour under the pad, add thermal vias, and consider a small heatsink if ambient exceeds 70°C. Monitoring case temperature and derating output current above 85°C ambient is strongly advised for mission-critical systems.
Is the LM5019SDX/NOPB a suitable drop-in replacement for the MAX17501 in a 24V to 3.3V low-noise analog sensor supply, and what noise-related trade-offs should be expected?
The LM5019SDX/NOPB is not a direct drop-in for the MAX17501 in low-noise analog applications despite both being synchronous buck converters. While the LM5019 offers higher input voltage capability (100V vs. 42V), its switching frequency can reach 1MHz, increasing high-frequency noise that may interfere with sensitive analog circuits. The MAX17501 has better inherent EMI performance due to its fixed 1.2MHz frequency and optimized internal gate drive. If replacing, add a π-filter (LC + ferrite bead) at the output and use a shielded inductor to suppress conducted emissions. Also, ensure the feedback network includes a small capacitor (e.g., 10pF) across the upper resistor to attenuate high-frequency gain. For precision sensor rails, consider post-regulation with an LDO after the LM5019SDX/NOPB to achieve cleaner output.
Quality Assurance (QC)
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LM5019SDX/NOPB CAD Models
Texas Instruments LM5019SDX/NOPB PCB symbols & footprints
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