The XC9502 series is a PWM controlled, PWM/PFM automatic switching controlled, multi-functional, 2 channel step-up and down DC/DC controller ICs. It has a standard voltage supply internal of 0.9V, and the output 1 voltage (step-up DC/DC controller) can be set freely within a range of 1.5V to 30V using externally connected components. The output 2 (step-down DC/DC controller) has a built-in 0.9V reference voltage (accuracy ± 2%), and can be set from 0.9V to 6.0V using external components. With a switching frequency of 180kHz, the size of the external components can be reduced. Switching frequencies of 300kHz and 500kHz are also available as custom-designed products. The control of the XC9502 series can be switched between PWM control and PWM/PFM automatic switching control using external signals. When automatic switching is selected, the control switches from PWM to PFM during light loads, and the series is highly efficient from light loads through to large output currents. Noise is easily reduced with PWM control as the frequency is fixed. The series provides freedom of control selection so that control suited to the application can be selected. The soft-start time is internally set to 10msec (Output1) and offers protection against in-rush currents when the power is switched, preventing voltage overshoot.
The XC9502 Series provides two independent DC/DC converters in a single package. Channel 1 operates as a step‑up controller with an output range of 1.5 V to 30 V, while Channel 2 functions as a step‑down controller with an output range of 0.9 V to 6 V. Both channels support PWM control, PWM/PFM automatic switching, and feature a 10 ms internal soft‑start to limit in‑rush current.
The device operates from a supply voltage of 2.0 V to 10.0 V and offers selectable oscillation frequencies of 180 kHz (standard) with custom options at 300 kHz and 500 kHz. Pin assignments, electrical characteristics, and typical application circuits are detailed, along with guidelines for setting output voltages using external resistor networks.
| Supply Voltage Range | 2.0 V ~ 10.0 V |
|---|---|
| Maximum Output Current – Channel 1 | >300 mA (V IN=1.8 V, V OUT=3.3 V) |
| Maximum Output Current – Channel 2 | 1000 mA (V IN=3.3 V, V OUT=1.8 V) |
| Oscillation Frequency | 180 kHz (standard), 300 kHz/500 kHz custom |
| Package | MSOP‑10, USP‑10 |
The standard frequency is 180 kHz, with custom options of 300 kHz and 500 kHz.
The maximum input voltage is 10 V.