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Texas Instruments LP3961ESX-2.5 — Discrete Semiconductors
Texas Instruments

LP3961ESX-2.5 LDO Regulator, Fixed 2.5V, 800mA, TO-263-5

MPNLP3961ESX-2.5
End of Life

Texas Instruments LP3961ESX-2.5, fixed positive LDO regulator, 800 mA output, 0.35 V dropout max, enable control, over-current/over-temperature/short-circuit protection, -40°C to 125°C, DDPAK/TO-263-5, Bulk.

$0.7Ref. price · indicative, final on quote
LP3961ESX-2.5 datasheet
PackagingTO-263-6, D²Pak (5 Leads + Tab), TO-263BA
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

LP3961ESX-2.5 Technical Specifications
ParameterValue
Output typeFixed
Mounting typeSurface Mount
Voltage - input7V
Voltage dropout0.35V @ 800mA
Voltage - output (Min (Fixed))2.5V
Current - output800mA
Current - supply15 mA
Current - quiescent9 mA
Operating temperature-40°C ~ 125°C
PackageBulk
CaseTO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Control featuresEnable
Protection featuresOver Current, Over Temperature, Short Circuit
Number of regulators1
Output configurationPositive

Product details

Fixed 2.5 V LDO for industrial rails

The Texas Instruments LP3961ESX-2.5 is a fixed positive LDO regulator delivering 800 mA at 2.5 V. It comes in a DDPAK/TO-263-5 surface-mount package with a tab for heat sinking. The enable pin lets you sequence the rail; protection features cover over-current, over-temperature, and short-circuit events. Rated for -40°C to 125°C, it suits outdoor telecom, motor drives, and factory-floor control boards where the ambient temperature climbs.

Quiescent and supply current budget

Quiescent current is 9 mA typical; maximum supply current is 15 mA.

Package and mounting — DDPAK/TO-263-5

The DDPAK/TO-263-5 package has five leads plus a large tab. The tab is the output (VOUT) and the primary thermal path. Solder the tab to a copper plane on the PCB; for 800 mA continuous at high ambient, a 1 in² pad is a reasonable starting point. If your pick-and-place line expects embossed tape, factor in a tube-to-tape transfer or order a taped variant.

Lifecycle and sourcing

RoHS status is listed as non-compliant, so verify your assembly house's exemption allowance if you need lead-free solder.

Frequently asked questions

Does LP3961ESX-2.5 have a fixed output voltage of 2.5V?

Yes, the output is fixed at 2.5 V. No external resistor divider is needed.

What is a direct replacement for LP3961ESX-2.5?

No official direct replacement is listed in the available records. For a pin-compatible alternative within the same family, check the LP3961 adjustable version (LP3961ES-ADJ) or other fixed-voltage variants in the DDPAK/TO-263-5 package, but verify pinout and enable polarity before substituting.