Negative rail generator in an 8-pin DIP
The Maxim Integrated MAX766CPA+ is a buck-boost switching regulator that generates a regulated negative output from a positive input rail. It operates in step-up/step-down (buck-boost) topology, meaning it can produce a negative voltage that is either higher or lower in magnitude than the input — useful when you need a -5V or -12V rail from a 3V or 5V supply. The output is adjustable from -1V down to -16V, with a fixed -1V option available; the output configuration is negative. Switching frequency is fixed at 300kHz, and the single output delivers up to 105mA. The part comes in an 8-pin PDIP through-hole package (8-DIP, 0.300" body width), supplied in a tube. It is rated for commercial temperature range (0°C to 70°C ambient).
What the ratings mean for the BOM
The 105mA output current sets the load ceiling. The 3V to 16V input range covers common battery chemistries and regulated rails.
Where it fits — and where it doesn't
This is a commercial-temperature part (0°C to 70°C), so it belongs in benchtop instruments, lab equipment, office electronics, or indoor power supplies. The through-hole PDIP package suits prototyping, breadboarding, and legacy board repairs.
Lifecycle and sourcing posture
The MAX766CPA+ is listed as Active with ROHS3 compliance. No pin-compatible second source is cited in the available records, so the Maxim part is the sole qualified option for this footprint and function.