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MIC4682 Datasheet(PDF) 14 Page - Micrel Semiconductor

Part # MIC4682
Description  Precision Current Limit SOIC-8 SuperSwitcher??Buck Regulator
PDF  15 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC4682 Datasheet(HTML) 14 Page - Micrel Semiconductor

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Micrel, Inc.
MIC4682
June 2007
14
M9999-061507
Typical Application Circuits
SW
SHDN
GND
IN
5
3
4
2,6,7
1
82
1
5-8
3
4
FB
ISET
MIC4682
C1
10µF/25V
Taiyo Yuden
TMK432BJ106MM
V
IN
11V to 24V
BAT
GND
IN
FB
EN
MIC79050
GND
V
OUT
4.2V 0.75%
GND
R1
10M
R2
28k
R3
3.01k
D1
1A/40V
MBRX140
Micro Commercial Components
R4
C2
100µF
10V(x2)
AVX
TPSC107M010R0200
L1
47H
Sumida
CDRH6D28-470NC
C3
4.7µF/20V
AVX
TPSA475M020R1800
2.5
3
3.5
4
4.5
0
250
500
750
1000
OUTPUT CURRENT (mA)
MIC4682 Current Limit
Characteristics
V
IN =12V
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0
1234
56
7
TIME (hrs)
Typical
Charging Characteristics
0
0.1
0.2
0.3
0.4
0.5
0.6
V
IN = 12V
Batt = 1.25Ah
Cutoff Voltage = 3.0V
Constant Current
Constant Voltage
Figure 6.Low-Cost Li Ion Battery Charger with 0.75% Precision Output Voltage



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