2ch. Step-Down DC/DC Controller

XC9503 series are PWM controlled, PWM/PFM automatic switching controlled, multi-functional, 2 channel step-down DC/DC controller ICs. With 0.9V (±2.0%) of standard voltage supply internal, and using externally connected components, output voltage can be set freely on both DC/DC controllers between 0.9V to 6V.

With a 300kHz frequency, the size of the external components can be reduced. 180kHz and 500kHz switching frequencies are also available as custom-designed products.

The control of the XC9503 series can be switched between PWM control and PWM/PFM automatic switching control using external signals. Control switches from PWM to PFM during light loads when automatic switching is selected and the series is highly efficient from light loads to large output currents. Noise is easily reduced with PWM control since the switching frequency is fixed. The series gives freedom to select control suited to the application.

Soft-start time is internally set to 10ms and offers protection against in-rush currents when the power is switched on and prevents voltage overshoot.


Input Voltage Range2.0V~10V
Power Supply Voltage Range2.0V~10V
Output Voltage Range0.9V~6.0V,Can be set freely with 0.9V (+-2.0%) of reference voltage supply and external components.
Oscillation Frequency300kHz, ±15%,180kHz, 500kHz is available as semi-custom
Output Current~1000mA(VIN=5.0V,VOUT=3.3V)
Stand-by Current3.0μA(MAX.)

Typical Application Circuit

Quality Reports


Package Number of Pins Pcs/Reel Package Size(mm)
MSOP-10 10 1,000 4.9 x 3.0 x 1.16
USP-10 10 3,000 2.5 x 2.7 x 0.6

XC9503 Series Part Numbers

Part number Sample Output Voltage Oscillation Frequency Packages EDA Online Store
XC9503B092AR-G 0.9V 180kHz MSOP-10
XC9503B092DR-G 0.9V 180kHz USP-10
XC9503B093AR-G 0.9V 300kHz MSOP-10
XC9503B093DR-G 0.9V 300kHz USP-10
XC9503B095AR-G 0.9V 500kHz MSOP-10
XC9503B095DR-G 0.9V 500kHz USP-10

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