Fixed 4.5 V rail with 78 dB PSRR — clean power for analog front-ends
Its PSRR starts at 78 dB at 1 kHz and rolls off to 54 dB at 100 kHz, making it a good fit for post-regulation of a switching supply feeding an analog or RF section where ripple rejection matters. The typical dropout voltage is 0.12 V at full load, so a 4.62 V input holds regulation cleanly. Quiescent current is 90 µA, and a shutdown control pin lets you gate the rail in low-power system states. Protection includes over-current and over-temperature limits.
SC-70-5 footprint — board-area budget for dense layouts
Housed in a 5-lead SC-70-5 (also listed as 5-TSSOP / SOT-353), this part fits a compact PCB footprint. The fixed output voltage means no external resistor divider is needed — just input and output capacitors per the datasheet recommendation. The shutdown pin is active-low, so if unused it should be tied to the input to keep the output enabled.
Active production — no obsolescence clock ticking
For dual-sourcing or a pin-compatible second source within the same family, a buyer would look at other fixed-voltage MAX8510 variants in the same SC-70-5 package — the family shares the same pinout and dropout characteristics, differing only by output voltage.