18V Operation 3.0A Synchronous Step-Down DC/DC Converters
The XC9280 series is 18V bootstrap synchronous step-down DC/DC converter with built-in Nch-Nch driver transistors, the operating voltage range is 4.5V～18.0V, designed to allow the use of ceramic capacitors.
0.75V reference voltage source is incorporated in the IC, and the output voltage can be set to a value from 1.8V to 7.0V using external resistors (RFB1, RFB2). Switching frequency is 1.2MHz. 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.
XC9280 has a fixed internal soft start time which is 0.95ms (TYP.), additionally the time can be extended by using an external resistor and capacitor. With the built-in UVLO function, the driver transistor is forced OFF when input voltage goes down to 3.33V (TYP.) or lower. Over current protection and thermal shutdown are embedded and they secure a safety operation.
|May 18, 2018||
|Step-Down Synchronous DC/DC Converters Compatible with 18V Input and 3A Peak Output XC9280 Series|
Typical Application Circuit
|Input Voltage||4.5V～18V（Absolute Max 20V）|
|Output Voltage||1.8V～7V or VIN x 0.7|
|Output Current||3.0A peak
2.0A DC (VIN=12V, VOUT=5V)
|Control Method||PWM/PFM Automatic|
(Adjustable by RC)
Over Current Protection(Automatic Recovery)
|Package||TSOT-26||Number of Pins||6|
|Pcs/Reel||3,000||Package Size(mm)||2.9 x 2.8 x 1.1|