Fixed -5 V rail from a positive input — what this regulator does
The MAX735EPA+ is a buck-boost switching regulator from Analog Devices (formerly Maxim Integrated) that takes a positive input between 4 V and 6.2 V and delivers a regulated -5 V output at up to 275 mA. It uses a fixed-frequency 160 kHz buck-boost topology with no synchronous rectifier, so the external diode and inductor selection matter for efficiency. The single output is configured as a negative rail — exactly what you need when a design calls for a -5 V supply from a +5 V bus, common in op-amp bipolar supplies, LCD bias generators, or legacy industrial sensor interfaces.
Through-hole 8-DIP — prototyping and field-service fit
The 8-DIP (0.300", 7.62 mm) through-hole package fits standard prototyping breadboards and makes hand-replacement in field-service swaps straightforward.
Industrial temperature range — where it runs
It is not qualified to AEC-Q100, so it is not the pick for under-hood automotive, but it is fine for most industrial control, instrumentation, and test equipment that stays within that envelope.