XC9221A09AMR-G

• Product introduction

XC9221A09AMR-G 16V input voltage step-down DC/DCcontroller

The XC9220/XC9221 family are multipurpose, step-down DC/DC controller ICs. The chip is externally equipped with a switch transistor, an inductor, a diode and two capacitors to obtain an efficient, stable power supply with an output current of up to 3A. Low ESR capacitors, such as ceramic capacitors, can be used as output capacitors.
The XC9220/XC9221 series has a 0.9V (±1.5%) reference voltage that allows the output voltage to be freely set using an external divider resistor. Switching frequencies of 300kHz, 500kHz, and 1.0MHz allow the use of small peripheral components. The XC9220 series is PWM control, and the XC9221 series is PWM/PFM control, which automatically switches from PWM to PFM when the load becomes lighter, thus maintaining high efficiency over the entire load range. Regarding soft-start time, the XC9220A/XC9221A and C Series are internally set to 4 ms, and the XC9220B/X9221B and D Series can be set externally. With a built-in U.V.L.O. (Undervoltage Lockout) function, the external P-channel switch is forced off when the input voltage is as low as 2.3V or lower. Available in two packages, SOT-25 and USP-6.

peculiarity

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