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LM73605QRNPRQ1
Texas Instruments
IC REG BUCK ADJ 5A 30WQFN
71509 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1V 1 Output 5A 30-WFQFN Exposed Pad
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (475 Ratings)
LM73605QRNPRQ1
Product Overview
1353628
DiGi Electronics Part Number
LM73605QRNPRQ1-DGManufacturer
Texas Instruments
LM73605QRNPRQ1
Description
IC REG BUCK ADJ 5A 30WQFNInventory
71509 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1V 1 Output 5A 30-WFQFN Exposed Pad
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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LM73605QRNPRQ1 Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Function
Step-Down
Output Configuration
Positive
Topology
Buck
Output Type
Adjustable
Number of Outputs
1
Voltage - Input (Min)
3.5V
Voltage - Input (Max)
36V
Voltage - Output (Min/Fixed)
1V
Voltage - Output (Max)
34.2V
Current - Output
5A
Frequency - Switching
350kHz ~ 2.2MHz
Synchronous Rectifier
Yes
Operating Temperature
-40°C ~ 125°C (TJ)
Grade
Automotive
Qualification
AEC-Q100
Mounting Type
Surface Mount, Wettable Flank
Package / Case
30-WFQFN Exposed Pad
Supplier Device Package
30-WQFN (6x4)
Base Product Number
LM73605
Datasheet & Documents
Manufacturer Product Page
LM73605QRNPRQ1 Specifications
HTML Datasheet
LM73605QRNPRQ1-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
296-49517-6
296-49517-2
LM73605QRNPRQ1-DG
296-49517-1
Standard Package
3,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
구매 후 고객 지원이 너무 좋아서 계속 이용하고 싶어요.
de desembre 02, 2025
The excellent price advantages do not compromise the consistent quality I expect.
de desembre 02, 2025
I highly value their competitive prices and responsive customer service.
de desembre 02, 2025
They offer peace of mind with their dependable products and support.
de desembre 02, 2025
Customer service team was exceptionally helpful after my purchase, very pleased.
de desembre 02, 2025
The courier delivered my order quickly, and it was perfectly protected.
de desembre 02, 2025
The company's focus on inventory accuracy and post-sales support makes them a preferred partner.
de desembre 02, 2025
Their website’s ease of use and affordable prices make them my first choice for tech needs.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the LM73605QRNPRQ1 in an automotive environment with wide input voltage transients?
The LM73605QRNPRQ1 is AEC-Q100 qualified and supports 3.5V to 36V input, making it suitable for automotive applications with load dump and cold crank events. However, careful PCB layout is critical to avoid false UVLO or regulator instability during fast transients. Ensure the input capacitor is placed close to VIN and PGND pins with low parasitic inductance, and consider adding a TVS diode for sustained overvoltage protection above 36V. Also verify switching frequency selection (up to 2.2MHz) doesn’t interfere with EMI-sensitive bands in your vehicle platform.
How does the LM73605QRNPRQ1 compare to the LM5143A-Q1 when designing for high-efficiency, high-current 12V automotive systems?
While both the LM73605QRNPRQ1 and LM5143A-Q1 are automotive-grade buck regulators, the LM73605QRNPRQ1 offers a simpler single-output adjustable 5A solution with integrated FETs, whereas the LM5143A-Q1 is a controller for external FETs targeting higher power (>50W) applications. For designs under 30W, the LM73605QRNPRQ1 provides better integration, smaller footprint, and easier loop control. The LM5143A-Q1 excels in efficiency at very high loads but adds complexity. Choose the LM73605QRNPRQ1 for compact, cost-sensitive 12V systems needing up to 5A.
Can the LM73605QRNPRQ1 be used to replace the TPS54560B in an existing design, and what layout adjustments are required?
Yes, the LM73605QRNPRQ1 can serve as a functional alternative to the TPS54560 in many 5A, step-down applications, especially where a smaller 30-WQFN package is preferred over the TPS54560’s HTSSOP. However, the pinout differs significantly—particularly around the exposed thermal pad and feedback network. Re-layout of the power stage and feedback divider is required. Ensure the thermal pad of the LM73605QRNPRQ1 is properly grounded and connected to an adequate copper plane to maintain thermal performance. Also verify that the higher max switching frequency (2.2MHz vs 600kHz) does not affect EMI or inductor DCR losses.
What are the reliability concerns when operating the LM73605QRNPRQ1 near its maximum junction temperature of 125°C for extended periods?
Operating the LM73605QRNPRQ1 near 125°C TJ under continuous load increases long-term failure risk due to electromigration and thermal cycling fatigue. To improve reliability, minimize power loss by selecting low-ESR input/output capacitors and low-DCR inductors. Ensure at least 4 to 6 thermal vias under the exposed pad connect to a solid ground plane. Consider derating current to 4A or less in high-ambient environments (e.g., under-hood). Monitor thermal performance with board-level validation testing under worst-case conditions to avoid premature wear-out.
How can output voltage stability be affected when using the LM73605QRNPRQ1 with ceramic capacitors in noise-sensitive applications?
The LM73605QRNPRQ1 uses D-CAP3™-like control, which relies on output capacitor ESR for loop stability, but works well with low-ESR ceramic capacitors. However, using only ceramics without sufficient capacitance or equivalent series resistance (ESR) can cause subharmonic oscillation or poor transient response. For stable operation, use at least 22μF of ceramic output capacitance and consider adding a small amount of ESR (e.g., a 1Ω resistor in series with a capacitor) or using a hybrid cap if instability is observed. Avoid undersizing the output capacitor, especially in designs with fast load steps (>2A/μs).
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.
LM73605QRNPRQ1 CAD Models
Texas Instruments LM73605QRNPRQ1 PCB symbols & footprints
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