What this tiny controller does on the board
The LTC2920-1CS5#TRM is a single/dual power supply controller from Analog Devices, designed to manage the turn-on sequence or tracking of one or two voltage rails in a system. It operates from a 2.3V to 6V supply and draws only 230 µA — low enough to leave it powered from the always-on standby rail without eating into the battery budget. The TSOT-23-5 package (SOT-23-5 Thin) keeps the footprint small, so it fits on dense memory or processor boards where every mm² counts.
Supply range and the sequencing decision
The 2.3V to 6V input covers the common 3.3V and 5V rails found in most memory and logic systems — no extra regulator needed to power the controller itself. At 230 µA supply current, the part can stay alive on the auxiliary rail during sleep or standby, ready to sequence the main rails back up without a separate enable signal from the processor. The commercial temperature range (0°C to 70°C) limits it to indoor, non-extreme environments — not a fit for automotive or outdoor gear without active cooling.
Package and handling for the field kit
Housed in a TSOT-23-5 (SOT-23-5 Thin) package, the part is small enough for a standard ESD tweezer swap on site, but the tiny pitch means a steady hand and good lighting — no lab bench required, but a magnifying visor helps. Supplied in Cut Tape (CT), it is ready for both prototype hand-assembly and small production runs without reel fees.