XD9263 Series

18V Operation 500mA Synchronous Step-Down DC/DC Converters

The XD9263 series are synchronous step-down DC/DC converter ICs. The XD9263 series have operating voltage range of 3V~18V and switching frequency is 2.2 MHz and it can support 500mA as an output current with high-efficiency. Compatible with Low ESR capacitors such as ceramic capacitors for the output capacitor.

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.

XD9263 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

UVLO and over current protection and short-circuit protection and thermal shutdown are embedded and they secure a safety operation. As an option, timer latch off over current protection (Integral Latch Method) can be selected.

Typical Application Circuit


Input Voltage Range 3.0V ~ 18.0V (Absolute Max 20V)
Output Voltage Range 1.0V ~ 15.0V
FB Voltage 0.75V ± 1.5% (Ta=25℃)
Oscillation Frequency 2.2MHz
Output Current 500mA
Quiescent Current 13.5μA
Control Methods PWM control
Efficiency 85%@12V→5V, 300mA
Function Soft-Start External settings
Power Good (USP-6C Package only)
Protect Function Over Current Protection
・Automatic Recovery (XD9263D/XD9264D)
・Integral Latch Method (XD9263C/XD9264C)
Thermal Shutdown
Output Capacitor Ceramic Capacitor
Operating Ambient Temperature -40℃ ~ 105℃
Environmentally Friendly EU RoHS Compliant, Pb Free



Technical Document