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Texas Instruments LM73605QURNPRQ1 — Discrete Semiconductors

TI LM73605QURNPRQ1 Buck Regulator, 5A, AEC-Q100, 36V Input

MPNLM73605QURNPRQ1
End of Life

Texas Instruments LM73605QURNPRQ1, Automotive AEC-Q100, Step-Down Buck Regulator, Adjustable Output, 5A, 3.5V-36V Input, 350kHz-2.2MHz, -40°C to 125°C, 30-WQFN (6x4) Wettable Flank.

$6.6Ref. price · indicative, final on quote
Packaging30-WFQFN Exposed Pad
RoHSNot applicable
SeriesAutomotive, AEC-Q100
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM73605QURNPRQ1 specifications
ParameterValue
SeriesAutomotive, AEC-Q100
Output typeAdjustable
MountingSurface Mount, Wettable Flank
Voltage - input3.5V
Voltage - output34.2V
Voltage - output (Min (Fixed))1V
Output current5A
Frequency - switching350kHz ~ 2.2MHz
I/O channels1
Operating temperature-40°C ~ 125°C (TJ)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Down
TopologyBuck
Case30-WFQFN Exposed Pad
Output configurationPositive
Synchronous rectifierYes

Product details

What this 5A automotive buck brings to the board

The integrated synchronous rectifier eliminates the external catch diode.

Key specs that drive the BOM decision

The 5A output is the headline number for inductor and output capacitor sizing. At 5A continuous, you need a low-DCR inductor rated for at least 6A saturation and output caps with enough ripple-current headroom. The 36V maximum input means it survives load-dump transients on a 12V automotive rail without external clamping, but on a 24V system check the margin against worst-case alternator surge. The wettable-flank package (30-WQFN with exposed pad) is a practical advantage for automotive production: it allows automated optical inspection of the solder joints on the bottom-side terminals, which a standard QFN hides. That saves a manual X-ray step in the line.

No end-of-life notification or last-time-buy schedule is on record.

The 30-WQFN (6x4 mm) exposed-pad package has an MSL rating that should be verified before reflow.

Frequently asked questions

Is LM73605QURNPRQ1 qualified for automotive use?

Yes, it is listed under the Automotive, AEC-Q100 series, meaning it meets the AEC-Q100 stress qualification for automotive-grade integrated circuits.

Where can I buy LM73605QURNPRQ1?

This part is sourced through independent distribution and is available to order against an RFQ. Contact us for current pricing and availability — both are confirmed at quote time.

Is LM73605QURNPRQ1 equivalent to LM73605QURNPR?

The LM73605QURNPRQ1 is the AEC-Q100 qualified variant of the base LM73605QURNPR. The 'Q1' suffix indicates automotive qualification; the non-Q1 version lacks that certification. Electrically they are the same design, but only the Q1 variant should be used in automotive BOMs requiring AEC-Q100 compliance.