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LM73605QRNPTQ1
Texas Instruments
IC REG BUCK ADJ 5A 30WQFN
1624 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
- (135 Ratings)
LM73605QRNPTQ1
Product Overview
1366192
DiGi Electronics Part Number
LM73605QRNPTQ1-DGManufacturer
Texas Instruments
LM73605QRNPTQ1
Description
IC REG BUCK ADJ 5A 30WQFNInventory
1624 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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LM73605QRNPTQ1 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
LM73605QRNPTQ1 Specifications
HTML Datasheet
LM73605QRNPTQ1-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
296-47932-6
296-47932-1
296-47932-2
Standard Package
250
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Prix compétitifs et fiabilité assurée, parfait pour moi.
de desembre 02, 2025
Die Lieferung war schnell und die Verpackung sehr sicher – alles perfekt.
de desembre 02, 2025
I was pleasantly surprised by DiGi Electronics' responsive customer service team. They addressed my post-purchase inquiries within an hour, providing clear and helpful guidance.
de desembre 02, 2025
Their packaging and shipping process are highly efficient, ensuring rapid delivery and safe arrival.
de desembre 02, 2025
They strike a perfect balance between affordability and sustainability.
de desembre 02, 2025
I appreciate the quick turnaround on delivery and helpful, prompt customer support.
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Frequently Asked Questions (FAQ)
What are the key design-in considerations for the LM73605QRNPTQ1 in an automotive-grade buck converter application to avoid thermal runaway?
When designing in the LM73605QRNPTQ1, ensure proper PCB thermal management to prevent localized heating, especially under continuous 5A load. Use a minimum 4-layer board with internal ground planes and sufficient copper pour connected to the exposed thermal pad. Avoid placing heat-sensitive components nearby, and verify thermal performance at maximum junction temperature (125°C). The AEC-Q100 qualification supports automotive environments, but inadequate thermal relief or insufficient airflow can still lead to premature degradation or thermal shutdown events.
Can the LM73605QRNPTQ1 safely replace the LM2678-5.0 in a 5V industrial power rail, and what are the critical integration differences?
The LM73605QRNPTQ1 can replace the LM2678-5.0 with improved efficiency and higher switching frequency flexibility (up to 2.2MHz), but requires careful attention to feedback loop design. Unlike the fixed-output LM2678-5.0, the LM73605QRNPTQ1 is adjustable—set the output using a precision resistor divider. Additionally, the LM73605QRNPTQ1 uses synchronous rectification, reducing the need for a catch diode, but requires low-ESR output capacitors to manage ripple. Confirm input voltage compatibility, as the LM73605QRNPTQ1 supports up to 36V, whereas the LM2678-5.0 is limited to 40V.
What risks arise when pushing the LM73605QRNPTQ1 close to its 5A current limit in a 24V-to-5V step-down design, and how can they be mitigated?
Operating the LM73605QRNPTQ1 near its 5A output limit in a 24V-to-5V conversion increases power dissipation due to high duty cycle and switching losses, risking thermal throttling or current foldback. To mitigate, use low-RDS(on) external MOSFETs (if applicable—note: this is an integrated solution), optimize inductor saturation current (minimum 6A), and verify stability under load transients. Reduce switching frequency to 350kHz if possible to lower AC losses, and monitor the overcurrent protection behavior in transient conditions to prevent false triggering.
How does the LM73605QRNPTQ1 compare to the TPS54560B-Q1 in terms of layout sensitivity and noise performance in high-density automotive ECUs?
The LM73605QRNPTQ1 and TPS54560B-Q1 both offer AEC-Q100 qualification and 36V input, but the LM73605QRNPTQ1's higher maximum switching frequency (up to 2.2MHz vs. 600kHz) allows smaller external components, reducing footprint. However, this increases sensitivity to poor PCB layout—keep high-current loops short and use 10μF ceramic input capacitance close to VIN and PGND pins. The LM73605QRNPTQ1's integrated bootstrap diode reduces component count but may require tighter control of SW node ringing. Use ground stitching vias and keep feedback traces shielded to maintain noise performance comparable to the TPS54560B-Q1.
What long-term reliability concerns should be addressed when using the LM73605QRNPTQ1 in high-temperature engine control modules?
In high-temperature environments, the LM73605QRNPTQ1’s reliability depends on sustained operation below its 125°C junction limit. Avoid sustained ambient temperatures above 105°C without active cooling or derating. Use conformal coating to protect against moisture and contaminants, especially given its MSL-2 rating; ensure reflow profiles strictly follow IPC standards to prevent voiding in the exposed thermal pad. Monitor stress factors like thermal cycling and voltage ripple, and consider accelerated life testing in final assembly to validate field longevity under real-world engine bay conditions.
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.
LM73605QRNPTQ1 CAD Models
Texas Instruments LM73605QRNPTQ1 PCB symbols & footprints
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