Datasheet

12
LTC1682/LTC1682-3.3/LTC1682-5
128235fs, sn128235 LT/TP 0799 4K • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 1999
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear-tech.com
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
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LTC1517-X Micropower, Regulated Charge Pump Doubler in SOT-23 I
CC
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CC
= 6µA
LT1761 Series 100mA Low Noise LDO Regulator in SOT-23 I
CC
= 20µA; 20µV
RMS
Output Noise
TYPICAL APPLICATION
U
Wide Input Range VCO Supply (V
IN
> 4.4V)
SHUTDOWN
C1
0.22µF
C4
4.7µF
3V
(REQUIRED FOR
START-UP)
Q1
FMMT3904
1682 ta04
V
IN
3V TO 6V
C3
4.7µF
5V
LOW NOISE
1
2
3
4
8
7
6
5
V
OUT
SHDN
FILT
GND
CPO
C
+
V
IN
C
–
R1
470Ω
LTC1682-5
C2
4.7µF
C
FILT
1nF
D1
1N4148
VCO