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Texas Instruments TPS78450QDBVRQ1 — Discrete Semiconductors
Texas Instruments

TPS78450QDBVRQ1 LDO Regulator, 5V Fixed, 300mA, AEC-Q100

MPNTPS78450QDBVRQ1
End of Life

Texas Instruments TPS78450QDBVRQ1, Automotive AEC-Q100 LDO regulator, fixed 5V output, 300mA, PSRR 60dB ~ 30dB (1kHz ~ 1MHz), SC-74A / SOT-753 package, -40°C to 150°C junction temperature.

$0.94Ref. price · indicative, final on quote
TPS78450QDBVRQ1 datasheet
PackagingSC-74A, SOT-753
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

TPS78450QDBVRQ1 Technical Specifications
ParameterValue
SeriesAutomotive, AEC-Q100
Output typeFixed
Mounting typeSurface Mount
Voltage - input6V
Voltage dropout0.115V @ 300mA
Voltage - output (Min (Fixed))5V
Current - output300mA
Current - quiescent40 µA
Operating temperature-40°C ~ 150°C (TJ)
PSRR60dB ~ 30dB (1kHz ~ 1MHz)
PackageTape & Reel (TR); Cut Tape (CT)
CaseSC-74A, SOT-753
Control featuresCurrent Limit, Enable, Soft Start
Protection featuresOver Current, Over Temperature, Under Voltage Lockout (UVLO)
Number of regulators1
Output configurationPositive

Product details

Fixed 5V LDO for automotive power rails

The Texas Instruments TPS78450QDBVRQ1 is a single-output, positive, fixed 5V LDO voltage regulator rated for 300mA continuous output. It is qualified to AEC-Q100, with a junction temperature range of -40°C to 150°C, making it a fit for under-hood and engine-bay electronics where ambient heat is high and supply rails must stay clean. The part integrates current limit, over-temperature protection, and under-voltage lockout (UVLO), plus a soft-start and enable pin for sequenced power-up. PSRR measures 60dB at 1kHz, rolling to 30dB at 1MHz — enough to reject alternator ripple and switching-converter noise on a 5V rail feeding an MCU or sensor interface.

PSRR across frequency — what 60dB at 1kHz means for the load

PSRR is 60dB at 1kHz and 30dB at 1MHz.

SOT-23-5 package — board footprint and thermal

Housed in a SOT-23-5 package. The 300mA output at 5V with a 6V input dissipates roughly 300mW.

Frequently asked questions

What is TPS78450QDBVRQ1's listed PSRR?

PSRR is 60dB at 1kHz, rolling to 30dB at 1MHz.