Products - Step-Down

XC9248 18V Synch Step-Down DC/DC Converter

18V Synch Step-Down DC/DC Converter image

Specifications


Property XC9248
Output Current 2.2A
Input Voltage 4.5 ~ 18V
Output Voltage 1.0 ~ 12V
Oscillation Frequency 500kHz
Quiescent Current 760µA
Packages SOP-8FD

Product Description


18V Synch Step-Down DC/DC Converter

The XC9248 series is a bootstrap-type Nch-Nch driver step-down synchronous DC/DC converter. The input voltage range is 4.5V to 18V and the maximum output current is 2.2A. Using the internal 0.8V reference voltage, the output voltage can be set using an external resistor ladder within a range of 1.0V to 12V. The control method is synchronous PWM control.

The soft start time is set internally to 2.8ms (TYP.) but can be adjusted to a time longer than the standard internal soft start time by connecting a capacitor to the SS pin.

An internal UVLO function forcibly turns off the two internal Nch FETs when the input voltage is 3.8V (TYP.) or less.

Over-current, VOUT short-circuit, LX short-circuit, VOUT over-voltage and thermal shutdown protection circuits are all incorporated and the XC9248 is available in a SOP-8FD package (6.0mm x 4.9mm x 1.55mm).

Features :

Input Voltage: 4.5V ~ 18.0V
Output Voltage: 1.0V ~ 12.0V
Output Current: 2.2A
Switching Frequency: 500kHz
Efficiency: 93.8% (VIN=12V, VOUT=5V, IOUT=700mA)
Thermal Shutdown
Fixed or Adjustable Soft-Start

 





XC9248 Efficiency vs Output Current