SLVS332J March 2001 – December 2016
PRODUCTION DATA.
The TPS797xx devices offer a low-dropout voltage, ultra-low-power operation, and are stable with any capacitor greater than 0.47 µF, and contains an integrated open-drain power good (PG) output.
The TPS797xx PMOS-pass transistor has a built-in back diode that conducts reverse current when the input voltage drops below the output voltage (for example, during power down). Current is conducted from the output to the input and is not internally limited. If extended reverse voltage operation is anticipated, external limiting might be appropriate.
The TPS797xx features internal current limiting. During normal operation, the TPS797xx limits output current to approximately 190 mA. When current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. Take care not to exceed the power dissipation ratings of the package.
Table 1 provides a quick comparison between the normal, dropout, and disabled modes of operation.