AS1301A-BWLT austriamicrosystems, AS1301A-BWLT Datasheet - Page 11

• Manufacturer Part Number: AS1301A-BWLT
• Description: IC BOOST/SW CAP 5V 50MA 8WLCSP
• Manufacturer: austriamicrosystems
• Type: Step-Up (Boost), Switched Capacitor (Charge Pump)r

Specifications of AS1301A-BWLT

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5V
• Current - Output: 50mA
• Frequency - Switching: 1MHz
• Voltage - Input: 2.7 ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: AS1301A-BWLTTR

AS1301
Datasheet - D e t a i l e d D e s c r i p t i o n
8.3 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.
8.4 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.
8.5 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 set to a high-Z condition. So it can be forced
OUT
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.
Note: For a stable operation trigger at least a rising edge on the EN pin to set the internal settings of the device after VBATT power-up.
8.6 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/DC-DC_Step-Up/AS1301
Revision 1.05
11 - 16