SC1531

The SC1531 is designed as to main a glitch-free 3.3V output when at least one of two inputs, 5V (Vin) and 3.3V VAUX is present. Whenever Vin exceeds a predetermined threshold value, the terminal 3.3V linear regulator is enabled, and DR is pulled high. Applications include deskdop computers, networks interface cards (NICs). (3)PCMCIA/PCI interface cards. (4)Cardbus technology. (5)Power supplies with multiple input sources.
SC1531 has eight features. (1)Glitch-free transition between input sources. (2)internal logic selects input source. (3)Gate drive for external PMOS bypass switch. (4)5V detection with hysteresis. (5)1% regulated output voltage accuracy. (6)200mA load current capability. (7)Remote sense. (8)SO-8 package. Those are all the main features.

Some absolute maximum ratings of SC1531 have been concluded into several points as follow. (1)Its input supply voltage would be from -0.5V to 7V. (2)Its auxiliary supply voltage would be from -0.5V to 7V. (3)Its LDO output current would be 200mA. (4)Its thermal impedance junction to ambient would be 130°C/W. (5)Its thermal impedance junction to case would be 47°C/W. (6)Its operating ambient temperature range would be from -5°C to 70°C. (7)Its operating junction temperature range would be from -5°C to 125°C. (8)Its storage temperature range would be from -65°C to 150°C. (9)Its lead temperature soldering 10 seconds would be 300°C. (10)Its ESD rating would be 2kV. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of SC1531 are concluded as follow. (1)Its supply voltage would be min 4.3V and typ 5.0V and max 5.5V. (2)Its quiescent current would be typ 7.0mA and max 10mA with test conditions of Vin=5V, Vaux=0V, Io=0mA. (3)Its reverse leakage from VAUX would be typ 1.0uA and max 10uA with test conditions of VAUX=3.6V, Vin=0V and Io=0mA. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!