Manual

MAX1684/MAX1685
Low-Noise, 14V Input, 1A, PWM
Step-Down Converters
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MAX1684
MAX1685
SYNC
AND
STANDBY
CONTROL
REF
2.5V
4µA
2.5V
OSC
GM
INTEGRATOR
PFM
COMPARATOR
PWM MODE
NORMAL MODE
LOW-POWER MODE
VL
THERMAL
SHUTDOWN
UNDERVOLTAGE
COMPARATOR
PWM
COMPARATOR
PFM
CURRENT
COMPARATOR
ILIM
COMPARATOR
ZERO-CROSSING
COMPARATOR
CVL
ON
CVL
ILIM/SS
IN
AIN
SHDN
CVL
REF
SYNC/PWM
STBY
CC
ILIM THRESHOLD
CONTROL
AND
DRIVER
LOGIC
VH
CVH
LX
PGND
BOOT
FB
AGND
0.125V
SLOPE COMPENSATION
Figure 2. Functional Diagram