Input Inductor Loss
PLin = I2 * DCRinput-L
Application Information (Continued)
FET Conduction Loss
PCn = 0.533W
in
Input Capacitor Loss
2.822*0.007 = 0.055W
Output Inductor Loss
PLout = I2 * DCRoutput-L
102*0.004 = 0.4W
o
System Efficiency
4.282*0.018/2 = 0.084W
Example Circuits
20049403
FIGURE 2. 5V-16V to 3.3V, 10A, 300kHz
This circuit and the one featured on the front page have been
designed to deliver high current and high efficiency in a small
package, both in area and in height The tallest component in
this circuit is the inductor L1, which is 6mm tall. The com-
pensation has been designed to tolerate input voltages from
5 to 16V.
13
www.national.com