1A Driver Transistor Built-in, Step-Up DC/DC Converters with Load Disconnection Function
XC9135 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 33Ω load 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 fixed output voltage has 1.8~5.0V (±2.0% accuracy) output voltage range with 0.1V increments. The UVLO function of the XC9135 series is capable to reduce leaking potassium hydroxide by stopping IC operation while battery voltage is declining. The release voltages of UVLO are 0.85V (±6.0% accuracy) and 1.6V (±3.0% accuracy), and selectable voltages range of 0.9V~3.0V.
Typical Application Circuit
|Input Voltage Range||0.65V～5.5V|
|Output Voltage Range||1.8V～5.0V(0.1V increments)|
|Oscillation Frequency||1.2MHz(Accuracy ±15%)|
|Output Current||500mA@VOUT=3.3V, VIN=1.8V(TYP.)|
|Control Methods||PWMControl、PWM/PFM auto|
|Load Transient Response||100mV VOUT=3.3V, VIN=1.8V, IOUT=1mA→200mA|
|Protection Circuits||Over-current limit
Integral latch method
|Functions||Soft-Start,Load Disconnection Function,CL Auto Discharge Function,Flag-out Function,UVLO|
|Capacitor||Low ESR Ceramic|
|Operating Ambient Temperature||-40℃～+85℃|