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LM73605RNPT
Texas Instruments
IC REG BUCK ADJ 5A 30WQFN
1348 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1V 1 Output 5A 30-WFQFN Exposed Pad
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5.0 / 5.0
- (497 Ratings)
LM73605RNPT
Product Overview
1333053
DiGi Electronics Part Number
LM73605RNPT-DGManufacturer
Texas Instruments
LM73605RNPT
Description
IC REG BUCK ADJ 5A 30WQFNInventory
1348 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1V 1 Output 5A 30-WFQFN Exposed Pad
Quantity
Minimum 1
Minimum 1
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LM73605RNPT 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)
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
LM73605RNPT Specifications
HTML Datasheet
LM73605RNPT-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
296-47478-6
LM73605RNPT-DG
296-47478-1
296-47478-2
Standard Package
250
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Une entreprise fiable avec un service client de grande qualité et une expédition rapide.
de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
Great experience with fast delivery and a support team that is always ready to help.
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Frequently Asked Questions (FAQ)
Can the LM73605RNPT handle input voltage transients above 36V during automotive load dump events, and what protection circuitry is recommended to avoid damage?
The LM73605RNPT has a maximum input voltage rating of 36V, which is exceeded during typical automotive load dump transients (which can reach 40V or higher). To safely use this regulator in such environments, you must add external transient voltage suppression—such as a TVS diode (e.g., SMAJ33A) or an active clamp circuit—rated for at least 40V clamping voltage. Without this protection, repeated exposure to overvoltage can degrade or destroy the LM73605RNPT, especially near its upper operating limit. Always validate your transient suppression design with real-world pulse testing per ISO 7637-2 standards.
Is the LM73605RNPT a suitable drop-in replacement for the LM25011 in a 24V-to-5V, 3A industrial power supply, considering efficiency and thermal performance?
While both are adjustable buck regulators, the LM73605RNPT is not a direct drop-in replacement for the LM25011 due to key differences in switching frequency, package thermal resistance, and control architecture. The LM73605RNPT operates at a much higher frequency (up to 2.2MHz vs. 250kHz for the LM25011), enabling smaller inductors but potentially increasing switching losses and EMI. Additionally, the 30-WQFN exposed pad of the LM73605RNPT offers better thermal performance than the LM25011’s HTSSOP-14, but requires proper PCB copper pour and via stitching. Replacing the LM25011 with the LM73605RNPT demands a full re-layout and re-evaluation of efficiency, thermal management, and EMI filtering—do not assume compatibility without validation.
What are the critical layout considerations when designing a PCB for the LM73605RNPT to ensure stable operation and minimize EMI in a compact 12V-to-3.3V, 4A application?
Stable and low-noise operation of the LM73605RNPT hinges on strict high-current loop minimization and proper grounding. Keep the SW node trace as short as possible, place the input capacitor (low-ESR ceramic, e.g., 10µF X7R) within 2mm of the VIN and GND pins, and use a solid ground plane with multiple vias connecting to the exposed thermal pad. Route the feedback network (FB pin) away from noisy traces like SW and use a ground guard ring if space allows. For EMI reduction, consider adding a small snubber across the inductor and ensure the switching frequency is set above 500kHz to avoid audio-range harmonics. Poor layout can cause oscillations, excessive ringing, or failed conducted emissions tests—simulate or prototype early.
How does the LM73605RNPT’s synchronous rectification affect light-load efficiency compared to non-synchronous alternatives like the TPS54302, and when might it be a disadvantage?
The LM73605RNPT’s integrated synchronous rectification improves efficiency at moderate to full loads (e.g., >1A) by reducing conduction losses in the freewheeling path. However, at very light loads (<100mA), the fixed gate drive losses and lack of true power-save mode can make it less efficient than non-synchronous controllers like the TPS54302, which uses diode emulation to skip pulses. In battery-powered applications with long idle periods, this can significantly impact runtime. If your system spends most of its time in sleep mode, consider whether the LM73605RNPT’s higher quiescent current (~25µA typical) and lack of automatic PFM/PWM transition justify its use—or if a part with burst-mode operation would be more appropriate.
Can the LM73605RNPT operate reliably in a high-vibration industrial environment without additional mechanical reinforcement of the 30-WQFN package?
The LM73605RNPT’s 30-WQFN package with wettable flank leads improves solder joint inspectability and mechanical strength compared to standard QFNs, but it is still susceptible to fatigue under sustained high vibration (e.g., >5Grms). In industrial or transportation applications with significant mechanical stress, you should reinforce the mounting by maximizing copper area under the exposed pad, using filled and capped vias, and applying conformal coating to reduce strain on solder joints. Avoid placing the LM73605RNPT near large inductors or transformers that may resonate. For mission-critical systems, perform accelerated vibration testing per IEC 60068-2-6 to validate long-term reliability—do not rely solely on package specs.
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LM73605RNPT CAD Models
Texas Instruments LM73605RNPT PCB symbols & footprints
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