Rainbow Electronics MAX1636 - Manual (Page 11)

MAX1636
Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
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REF
V CC
IC
POWER
200kHz
TO
300kHz
OSC
PWM
LOGIC
TO VL
INPUT
VL
REF
SHDN
V+ SYNC
DL
PGND
LX
DH
BST
SKIP
VL
CSH
CSL
FB
CC
REF
0.2V
GND
POWER
GOOD
V
REF
-5%
V
REF
+7%
V
REF
-30%
+
60kHz
LP FILTER
SHUTDOWN
CONTROL
1.1V
REF.
POWER
SWITCHOVER
TIMER
ERROR
INTEGRATOR
-
+
-
+
-
++
-
+
-
+
-
RESET
OVP
MAX1636
gm
OVERVOLTAGE
FAULT
UNDER-
VOLTAGE
FAULT
OFF
SLOPE
COMPENSATION
5V
LINEAR
REG.
Figure 2. Functional Diagram