LTC1682-3.3_15 Datasheet, PDF (7/12 Pages) Linear Technology – Doubler Charge Pumps with Low Noise Linear Regulator

BLOCK DIAGRA SM
LTC1682/LTC1682-3.3/LTC1682-5
V_IN
6
C4
4.7µF
C1
0.22µF
C⁺ ₇
5 ^C–
CHARGE PUMP
AND
SLEW CONTROL
CLK1
ENB
CPO
8
275k
C3
4.7µF
SHDN 2
FILT
3
1nF
POWER-
ON
RESET
SD
REGEN
ENB
200k
550kHz
REG B
OSCILLATOR
–
+
V_IN
V_REF = 1.235V
RA
120k/65.5k
REGEN
RB
200k
38k
328k
1:100
LDO
1µA/2µA
1
SD
100Ω
V_OUT
C2
4.7µF
4
GND
1682 F02
Figure 2. LTC1682-3.3/LTC1682-5 Block Diagram
7