6
LTC1682/LTC1682-3.3/LTC1682-5
Figure 1. LTC1682 Block Diagram
BLOCK DIAGRA SM
W
–
+
–
+
+
–
CHARGE PUMP
AND
SLEW CONTROL
550kHz
OSCILLATOR
POWER-
ON
RESET
SD
REGEN
ENB
REGEN
FB
CLK1
REG B
SHDN
C1
0.22µF
C
+
V
IN
V
IN
V
REF
= 1.235V
C
–
275k
C3
4.7µF
38k
328k
1:100
1µA/2µA
SD
LDO
100Ω
ENB
GND
CPO
V
OUT
1682 F01
C2
4.7µF
R1
R2
C4
4.7µF
8
57
6
2
34
1
