Obsolete — sourcing reality for a legacy 5V rail
The LP2950CZ-5.0/T1 carries an Obsolete lifecycle status.
This is a positive fixed 5V output LDO regulator with a 100 mA current capability. The 0.6 V maximum dropout at full 100 mA load sets the minimum input-to-output headroom. The 120 µA quiescent current is low enough for always-on or battery-backed rails, though modern LDOs in the same class often pull under 30 µA. The TO-92-3 through-hole package is a legacy footprint; board re-spins for a surface-mount SOT-23 or SOT-223 alternate are common when migrating away from this part.
Protection features and design margin
On-chip protection includes Over Current and Over Temperature shutdown. The 30 V maximum input voltage gives generous headroom for unregulated supplies. The single regulator output is fixed at 5V — no adjustable version here, so the BOM must match that rail.
Package and marking check for authenticity
The TO-92-3 body is the standard 3-lead through-hole format. For buyers sourcing this obsolete part on the open market, the laser etch and date-code font consistency are the first line of defence against re-marked stock. A decap X-ray can confirm the die matches the LP2950 family layout.