mic4682 Micrel Semiconductor, mic4682 Datasheet - Page 14

• Manufacturer Part Number: mic4682
• Description: Mic4682 Precision Current Limit So-8 Superswitcher? Buck Regulator
• Manufacturer: Micrel Semiconductor

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