What the MAX764CPA+ does and where it fits
The MAX764CPA+ is a step-up/step-down (buck-boost) switching regulator from Analog Devices that produces a regulated negative output from a positive input rail. It delivers up to 260 mA with an adjustable output from -1 V down to -16 V, using a fixed 300 kHz switching frequency. The negative output is useful for biasing op-amps, LCD contrast drivers, or sensor front-ends that need a clean negative rail. Housed in an 8-pin DIP package (0.300" width, 7.62 mm pitch) with through-hole mounting, it is breadboard- and protoboard-friendly. The tube packaging suits low-to-mid volume builds or lab prototypes.
Output configuration and switching behaviour
The output is configured as a single negative rail, adjustable via an external resistor divider. The minimum fixed output is -5 V, but the adjustable range goes from -1 V to -16 V, covering common negative supply voltages. Switching at 300 kHz allows the use of a small inductor (typically 10 µH to 47 µH) while keeping ripple manageable. The part does not include synchronous rectification, so an external Schottky diode is required for the boost path. Not specified for extended industrial or automotive ambient; if the board sees -20°C or +85°C, this part is outside its guaranteed range.
No pin-compatible second-source or successor is recorded on this line.