Step-Up Converter
for Handheld Applications
TRUE SHUTDOWN:
P1 BODY DIODE
LX_
OUT_
IN
N1 = OFF
P1 = OFF
TRACK/ATM MODE:
P1 BODY DIODE
LX_
OUT_
IN
N1 = OFF
P1 = CURRENT-
LIMITED SWITCH
BOOST SOFT-START:
IN
P1 BODY DIODE
LX_
OUT_
N1 = SWITCHING
P1 = OFF
BOOST MODE:
IN
P1 BODY DIODE
LX_
OUT_
N1 = SWITCHING
P1 = SWITCHING
P1 BODY DIODE
BOOST EXIT MODE:
LX_
OUT_
IN
N1 = OFF
P1 = OFF
Figure 3. Modes of Operation
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