High-Efficiency Step-Up Converters with
Reverse Battery Protection
OUT
STARTUP
CIRCUITRY
MAX1832
MAX1834
SHDN
FB
ERROR
COMPARATOR
CONTROL
LOGIC
1.228V
ZERO-
CROSSING
DETECTOR
DRIVER
P
LX
N
REVERSE BATTERY
PROTECTION MOSFET
N
BATT
CURRENT
LIMIT
Figure 2. MAX1832/MAX1834 Simplified Functional Diagram
OUT
STARTUP
CIRCUITRY
MAX1833
MAX1835
ERROR
COMPARATOR
1.228V
CONTROL
LOGIC
RST
N
RESET
1.1V
GND
ZERO-
CROSSING
DETECTOR
DRIVER
P
LX
N
REVERSE BATTERY N
BATT
PROTECTION MOSFET
CURRENT
LIMIT
GND
SHDN
Figure 3. MAX1833/MAX1835 Simplified Functional Diagram
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