where V
RIPPLE
is the maximum output ripple voltage
and C
OUT
is a ceramic capacitor. Choose the output
Schottky diode to be rated for I
PK
and V
OUT
. Similarly,
choose the extra MOSFET to be rated for I
PK
, V
GS,BR
>
V
IN
, and fast switching (< 50ns).
The buck-boost portion of the circuit shown in Figure 8
delivers 24V at 50mA with 70% efficiency. A preload
resistor is used to ensure constant frequency operation
over the entire load range.
MAX8529
1.5MHz Dual 180° Out-of-Phase
PWM Step-Down Controller with POR
______________________________________________________________________________________ 19
Chip Information
TRANSISTOR COUNT: 6688
PROCESS: BiCMOS
