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Texas Instruments LM51231QRGRRQ1 — Analog & Data Acquisition
Texas Instruments

TI LM51231QRGRRQ1 Automotive Boost Controller, AEC-Q100

MPNLM51231QRGRRQ1
End of Life

Texas Instruments LM51231QRGRRQ1, Automotive Grade, Synchronous Boost Controller, 1 Output, Transistor Driver, 100kHz ~ 2.2MHz, 0.8V ~ 42V Supply, -40°C ~ 125°C, 20-VQFN (3.5x3.5) Wettable Flank.

$4.26Ref. price · indicative, final on quote
LM51231QRGRRQ1 datasheet
Packaging20-VFQFN Exposed Pad
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

LM51231QRGRRQ1 Technical Specifications
ParameterValue
Output typeTransistor Driver
Mounting typeSurface Mount, Wettable Flank
Voltage - supply (Vcc (Vdd))0.8V ~ 42V
Frequency100kHz ~ 2.2MHz
Number of outputs1
Output phases1
Duty cycle98%
Operating temperature-40°C ~ 125°C (TA)
GradeAutomotive
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Up
TopologyBoost
Clock syncYes
QualificationAEC-Q100
Case20-VFQFN Exposed Pad
Output configurationPositive
Synchronous rectifierYes

Product details

Active production, no LTB risk — current TI portfolio

The part is ROHS3 compliant.

Synchronous vs non-synchronous — the LM5150 alternative

The LM5150QURUMRQ1 is a non-synchronous boost controller also AEC-Q100 qualified, but its 87% duty-cycle ceiling and lack of synchronous rectification mean it trades efficiency for a 150°C junction rating. The LM51231QRGRRQ1 wins where thermal budget is tight and the ambient stays within 125°C; the LM5150 extends the temperature headroom for exhaust-adjacent or turbocharger-adjacent placements.

Frequently asked questions

Is LM51231QRGRRQ1 RoHS compliant?

Yes. The part is ROHS3 compliant per the manufacturer's classification.

What is the closest functional second-source for LM51231QRGRRQ1?

The LM5150QURUMRQ1 is a non-synchronous boost controller from TI with the same AEC-Q100 qualification and a wider 150°C junction rating, but it lacks synchronous rectification and has a lower 87% duty cycle. It is a functional alternative if the efficiency and duty-cycle trade-off is acceptable, not a pin-compatible drop-in.

What are the operating specifications of LM51231QRGRRQ1?

It is a synchronous boost controller with one output, switching from 100kHz to 2.2MHz, operating from -40°C to 125°C ambient. The supply range is 0.8V to 42V, and the maximum duty cycle is 98%.