Charge-pump step-up for low-power 12 V rails
The MAX662AESA+T: It switches at 500 kHz, which keeps the external flying capacitors small enough for a compact 8-SOIC layout.
What the 30 mA / 12 V rating means for your BOM
At 30 mA output, this part is sized for bias rails, op-amp supplies, or small-signal loads — not a power amplifier or relay driver. The fixed 12 V output eliminates the need for an external feedback divider, saving two resistors and a feedback-node noise source. The 500 kHz switching frequency lets you use 0.1 µF to 1 µF ceramic flying capacitors, which are smaller and cheaper than the electrolytics needed for lower-frequency charge pumps. No synchronous rectifier means the output diode (typically a Schottky) drops ~0.3 V to 0.4 V, so the actual output at the load is about 11.6 V to 11.7 V under full load — budget this into the downstream regulator headroom if you need a clean 12 V rail.
The 8-SOIC package's thermal impedance is adequate for the 30 mA output; the die temperature stays well below the 125 °C abs-max junction limit as long as the ambient stays within the rated band.
Analog Devices lists the MAX662AESA+T as Active.