ISL97516 Intersil Corporation, ISL97516 Datasheet - Page 8

• Manufacturer Part Number: ISL97516
• Description: PWM Step-Up Regulator
• Manufacturer: Intersil Corporation

ISL97516
DC PATH BLOCK APPLICATION
Note that there is a DC path in the boost converter from the
A
V
VDD
IN
input to the output through the inductor and diode, hence the
input voltage will be seen at output with a forward voltage
drop of diode before the part is enabled. If this voltage is not
desired, the following circuit can be inserted between input
and inductor to disconnect the DC path when the part is
LX
disabled.
FB
Intersil
INPUT
TO INDUCTOR
ISL97516
EN
FIGURE 15. CIRCUIT TO DISCONNECT THE DC PATH OF
FIGURE 14. CASCADED MOSFET TOPOLOGY FOR HIGH
BOOST CONVERTER
OUTPUT VOLTAGE APPLICATIONS
8
FN9261.1
December 22, 2006