USP 10B – XC9131
Description
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
Features
| 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%) |
| Input Voltage | 1.0A |
| 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 | Thermal Shut Down、Over Current Limit |
| Functions | Soft-start, Load Disconnection Function, CL Discharge Function, Flag-out Function |
| Capacitor | Low ESR Ceramic |
