AS1301_1 AMSCO [austriamicrosystems AG], AS1301_1 Datasheet - Page 11

• Manufacturer Part Number: AS1301_1
• Description: 5V/50mA Low Noise Inductorless Boost Converter
• Manufacturer: AMSCO [austriamicrosystems AG]

AS1301
Data Sheet
- D e t a i l e d D e s c r i p t i o n
Overload Protection
When the output voltage drops significantly below battery voltage due to a very high load the AS1301 enters into an
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 period and ramps up to the nominal output voltage.
Undervoltage Lockout, UVLO
The AS1301 is equipped with 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 turns-on automatically.
Shutdown Mode
The AS1301 enters low-power shutdown mode when EN is set to logic low. In shutdown the charge-pump action is
halted, the output is completely disconnected from the input and V
will drop to 0V. During shutdown the output is
OUT
set to a high-Z condition. So it can be forced higher voltage then the input, 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.
www.austriamicrosystems.com
Revision 1.03
11 - 16