AS1301
Data Sheet - Detailed Description
Overload Protection
When the output voltage drops about 200mV below battery voltage due to very high load the AS1301 enters overload
protection condition. In this condition the output is connected to the input via a current limiting connection. Once the
overload is removed, the device enters soft start periode and ramps up to the nominal output voltage.
Undervoltage Lockout
The AS1301 is equipped with an undervoltage lockout functionality. If the battery voltage drops below 2.7V (typ) the
device enters the undervoltage lockout condition. The device remains in this condition until the battery voltage is high
enough to enter the soft start period. An internal hysteresis of 100mV will prevent ringing during startup. If the input
voltage climbs back to 2.8V (typ) after such a condition the device will turn-on automatically again.
Shutdown Mode
The AS1301 enters low-power shutdown mode when EN is logic low. In shutdown the charge-pump action is halted,
the output is completely disconnected from the input and VOUT will drop to 0V. During shutdown the output voltage can
be forced higher then the input voltage, because the permanent monitoring of the input- and output voltage will prevent
an erroneous current form the output back to the input during shutdown.
Thermal Shutdown
The AS1301 offers thermal shutdown, which prevents eventual damage due to an over-temperature condition.
Thermal shutdown will be initiated if the junction temperature exceeds 145°C. If the temperature drops below this
value, the thermal shutdown will be released automatically and the device will resume operation.
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