TOREX SEMICONDUCTOR XCL225
The XCL225 series is fixed to PWM control. The XCL226 series is PWM / PFM automatic switching control.GENERAL DESCRIPTION
The XCL225/XCL226 series are 18V operation synchronous step-down DC/DC converter ICs with a built-in high-side / low-side driver transistor. The XCL225/XCL226 series has operating voltage range of 3.0V~18.0V and it can support 500mA as an output current with high-efficiency. Compatible with Low ESR capacitors such as ceramic capacitors for the load capacitor (CL). 0.75V reference voltage source is incorporated in the IC, and the output voltage can be set to a value from 1.0V to 15.0V using external resistors (RFB1, RFB2). 1.2MHz can be selected for the switching frequency. In PWM/PFM automatic switchover control, IC can change the control method between PWM and PFM based on the output current requirement and as a result IC can achieve high efficiency over the full load range. XCL225/XCL226 has a fixed internal soft start time which is 1.0ms (TYP.), additionally the time can be extended by using an external resistor and capacitor.●
APPLICATIONS
● Hot water supply sys...