鈮?/div>
0.9 V
OUT
3
EN
VO
鈥?1% values shown.
Figure 18. TPS72101 Adjustable LDO Regulator Programming
REGULATOR PROTECTION
The TPS721xx pass element has a built-in back diode that safely conducts reverse current when the input voltage drops
below the output voltage (e.g., during power down). Current is conducted from the output to the input and is not internally
limited. If extended reverse voltage is anticipated, external limiting might be appropriate.
The TPS721xx also features internal current limiting and thermal protection. During normal operation, the TPS721xx limits
output current to approximately 350 mA. When current limiting engages, the output voltage scales back linearly until the
overcurrent condition ends. While current limiting is designed to prevent gross device failure, care should be taken not to
exceed the power dissipation ratings of the package. If the temperature of the device exceeds 170掳C, thermal-protection
circuitry shuts it down. Once the device has cooled down to below 150掳C, regulator operation resumes.
9