Charge pump with ratiometric output — what the 100 mA rating means for your rail
The MAX660MX/NOPB: The 100 mA current rating is the continuous output the charge pump can sustain without the internal switching FETs overheating in the 8-SOIC package at 85 °C ambient — budget this into your load calculation; a 50 mA op-amp rail plus 20 mA for a level shifter leaves 30 mA headroom, which is tight if you add a reference load.
Switching frequency trade-off and output configuration
The internal oscillator runs at either 10 kHz or 80 kHz — the lower frequency minimises switching losses and radiated noise for sensitive analog front-ends, while the 80 kHz setting reduces output ripple and lets you use smaller pump capacitors at the cost of higher quiescent current. The positive or negative output configuration is set by the external capacitor connections — no inductor needed, which keeps the BOM compact for generating a bipolar supply from a single positive rail in low-power mixed-signal designs.
Active lifecycle and board-fit for the 8-SOIC footprint
Housed in the standard 8-SOIC package (0.154" body width, 3.90 mm), it mounts on any surface-mount PCB with that footprint — the same land pattern used by countless op-amps and comparators, so no board spin is needed to drop it into an existing SOIC-8 socket.