1A Driver Transistor Built-in, Step-Up DC/DC Converters with Load Disconnection Function
XC9131 series are synchronous step-up DC/DC converters with a 0.2Ω(TYP.) N-ch driver transistor and a 0.2Ω(TYP.) synchronous P-ch switching transistor built-in. A highly efficient and stable current can be supplied up to 1.0A by reducing ON resistance of the built-in transistors.
The series are able to start operation under the condition which has 0.9V input voltage to generate 3.3V output voltage with a 33Ωload resistor, suitable for mobile equipment using only one Alkaline battery or one Nickel metal hydride battery.
During the operation of a shutdown, the load disconnection function enables to cut the current conduction path from the input to the output.
The XC9131 series has 0.5V±0.01V reference voltage integrated and being able to set an output voltage with external components.
Typical Application Circuit
|Input Voltage Range||0.65V～5.5V|
|Output Voltage Range||VFB=0.50V±0.01V Set up with external components|
|Oscillation Frequency||1.2MHz(Accuracy ±15%)|
|Control Methods||PWMControl、PWM/PFM auto|
|Load Transient Response||100mV@VOUT=3.3V、VIN=1.8V、IOUT=1mA→200mA|
|Protection Circuits||Thermal Shut Down、Over Current Limit|
|Functions||Soft-start, Load Disconnection Function, CL Discharge Function, Flag-out Function|
|Capacitor||Low ESR Ceramic|