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LMR14030SSQDDAQ1
Texas Instruments
IC REG BUCK ADJ 3.5A 8SOPWR
17716 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3.5A 8-PowerSOIC (0.154", 3.90mm Width)
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5.0 / 5.0
- (334 Ratings)
LMR14030SSQDDAQ1
Product Overview
1299649
DiGi Electronics Part Number
LMR14030SSQDDAQ1-DGManufacturer
Texas Instruments
LMR14030SSQDDAQ1
Description
IC REG BUCK ADJ 3.5A 8SOPWRInventory
17716 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3.5A 8-PowerSOIC (0.154", 3.90mm Width)
Quantity
Minimum 1
Minimum 1
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LMR14030SSQDDAQ1 Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Tube
Series
SIMPLE SWITCHER®
Product Status
Active
Function
Step-Down
Output Configuration
Positive
Topology
Buck
Output Type
Adjustable
Number of Outputs
1
Voltage - Input (Min)
4V
Voltage - Input (Max)
40V
Voltage - Output (Min/Fixed)
0.8V
Voltage - Output (Max)
28V
Current - Output
3.5A
Frequency - Switching
200kHz ~ 2.5MHz
Synchronous Rectifier
No
Operating Temperature
-40°C ~ 125°C (TJ)
Grade
Automotive
Qualification
AEC-Q100
Mounting Type
Surface Mount
Package / Case
8-PowerSOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SO PowerPad
Base Product Number
LMR14030
Datasheet & Documents
Manufacturer Product Page
LMR14030SSQDDAQ1 Specifications
HTML Datasheet
LMR14030SSQDDAQ1-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-43688
Standard Package
75
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
이전보다 훨씬 저렴한 가격에 전자제품을 구입했고, 직원들도 친절했어요.
de desembre 02, 2025
Ich bin beeindruckt von der schnellen Versandzeit, meine Bestellung wurde umgehend versendet, was für mich sehr praktisch war.
de desembre 02, 2025
Their reliable and fast delivery service enhances my online shopping experience.
de desembre 02, 2025
It’s reassuring to know that their support team is always available for assistance.
de desembre 02, 2025
The support team is knowledgeable, prompt, and always helpful when we need assistance.
de desembre 02, 2025
Their promptness and professionalism gave me complete peace of mind.
de desembre 02, 2025
The speed of delivery always surprises me in a good way.
de desembre 02, 2025
Their delivery times are consistently quick, making procurement hassle-free.
de desembre 02, 2025
The detailed craftsmanship of their products reflects a genuine dedication to excellence.
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Frequently Asked Questions (FAQ)
Can the LMR14030SSQDDAQ1 be used to replace a failed LM2596 in an automotive infotainment system, and what design changes are needed to ensure reliability?
Direct replacement of the LM2596 with the LMR14030SSQDDAQ1 is not recommended without circuit modifications due to key architectural differences. The LMR14030SSQDDAQ1 is a synchronous-capable (though non-synchronous in this variant), high-frequency (200kHz–2.5MHz) buck regulator with an integrated high-side FET, while the LM2596 is a legacy asynchronous, lower-frequency (150kHz) design requiring an external Schottky diode. To safely substitute, you must redesign the feedback network, select appropriate high-frequency input/output capacitors (low-ESR ceramic types), and ensure PCB layout follows TI’s PowerPAD thermal guidelines. Additionally, verify EMI compliance, as the higher switching frequency of the LMR14030SSQDDAQ1 may require additional filtering in sensitive automotive audio circuits.
What are the critical layout considerations when designing a PCB for the LMR14030SSQDDAQ1 in a compact automotive module with limited ground plane area?
The LMR14030SSQDDAQ1 requires a low-inductance power loop and effective thermal management via its PowerPAD package. Keep the SW node trace short and wide to minimize ringing and radiated noise. Place input ceramic capacitors (≥10µF, X7R) within 3mm of VIN and GND pins. Use a solid ground plane connected directly to the PowerPAD through multiple vias (≥9 vias of 0.3mm diameter) to improve heat dissipation and reduce ground bounce. Avoid routing sensitive analog signals under the inductor or switching path. In space-constrained designs, prioritize thermal relief over symmetry—even with limited ground area, proper via stitching prevents thermal shutdown during sustained 3.5A loads at high ambient temperatures.
How does the LMR14030SSQDDAQ1 compare to the newer TPS54360DDAR for a 12V-to-5V automotive power rail, and when should I choose one over the other?
While both are 40V-input buck converters qualified for automotive use, the LMR14030SSQDDAQ1 offers higher maximum output current (3.5A vs. 3A) and operates down to 0.8V output, making it better suited for low-voltage digital loads. However, the TPS54360DDAR includes integrated synchronous rectification, improving efficiency by ~8–12% at light loads (<500mA)—critical for always-on systems. Choose the LMR14030SSQDDAQ1 when peak current delivery and cost are priorities; opt for the TPS54360DDAR when quiescent current and full-load efficiency dominate, especially in battery-powered modules. Note that the LMR14030SSQDDAQ1’s adjustable frequency allows spread-spectrum optimization for EMI, which the fixed-frequency TPS54360DDAR lacks.
Is the LMR14030SSQDDAQ1 suitable for cold-cranking scenarios in a 12V automotive system where input voltage drops to 4V for 100ms?
Yes, but with caveats. The LMR14030SSQDDAQ1 supports a minimum input voltage of 4V, matching typical cold-cranking profiles (ISO 16750-2). However, at 4V input, the duty cycle approaches 100% when regulating to 3.3V or lower outputs, increasing switch stress and reducing efficiency. To ensure stable operation, use a soft-start capacitor to limit inrush current and select an inductor with low DCR and high saturation current (>4A). Also, verify that your output capacitor bank maintains regulation during the voltage dip—low-ESR ceramics with sufficient bulk capacitance (e.g., 2x22µF + 100µF polymer) are recommended. Without these mitigations, the regulator may enter dropout or trigger UVLO during extended cranking events.
What derating guidelines should I follow for the LMR14030SSQDDAQ1 when operating continuously at 3.5A in a sealed automotive under-hood enclosure reaching 105°C ambient?
At 105°C ambient and full 3.5A load, the LMR14030SSQDDAQ1 will approach its thermal limits due to junction-to-ambient resistance (θJA ≈ 40°C/W on standard PCB). Expect junction temperatures exceeding 140°C without aggressive thermal design. Derate output current by ~20% (to ~2.8A) or implement forced airflow (>100 LFM). Alternatively, increase copper area on the PowerPAD (≥2 in² of 2oz copper) and use thermal vias to inner/ground layers. Monitor efficiency—conduction losses dominate at high temps—and consider lowering switching frequency (e.g., to 500kHz) to reduce switching losses. Always validate with thermal imaging under worst-case load and ambient conditions to avoid premature aging or thermal shutdown.
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LMR14030SSQDDAQ1 CAD Models
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