Dual low-side switch with integrated protection
The MAX258ATA+T is a dual N-channel low-side power switch in a 8-TDFN (2x3 mm) package, designed for general-purpose on/off control of loads up to 500 mA per channel. Typical on-resistance is 145 mOhm, which at 500 mA translates to roughly 36 mW conduction loss per channel — negligible in most low-power designs, but worth budgeting if both channels run continuously at the ceiling.
Slew-rate control and fault protection
Slew-rate controlled switching limits the output voltage edge rate, reducing conducted and radiated EMI on the load traces — useful when switching into capacitive loads or long harness runs. Built-in over-temperature shutdown and undervoltage lockout (UVLO) protect the switch and downstream circuitry if the load rail droops or the die exceeds the thermal limit. The 1:2 input-to-output ratio means a single enable pin controls both channels simultaneously — no per-channel gating.
Analog Devices lists this part as active in production, with RoHS3 compliance.