參數(shù)資料
型號: MIC4681BM
廠商: MICREL INC
元件分類: 穩(wěn)壓器
英文描述: 2A-Peak SuperSwitcher⑩ SOP-8 Buck Regulator
中文描述: 2.1 A SWITCHING REGULATOR, 220 kHz SWITCHING FREQ-MAX, PDSO8
封裝: SOP-8
文件頁數(shù): 15/19頁
文件大?。?/td> 395K
代理商: MIC4681BM
February 2001
15
MIC4681
MIC4681
Micrel
Applications Circuits*
For continuously updated circuits using the MIC4681, see Application Hint 37at www.micrel.com.
SW
L1
100
μ
H
IN
FB
GND
SHDN
C3
220
μ
F
10V
R2
3.01k
R3
976
D2
1N4148
R4
16.2k
R5
221k
R6
10k
U2
R1
0.100
C4
10nF
D1
MMBR140LT3
D3
1N4148
C5
220nF
J2
5V
±
2%
800mA
±
5%
J4
GND
U1
MIC4681
C2
100nF
C1
22
μ
F
35V
J3
GND
J1
+30V max.
SOP-8
5
8
4
3
2
1
S1
NKK G12AP
ON
OFF
LM4041DIM3-1.2
U3
MIC6211BM5
4
5
2
3
R7
4.99k
T
Figure 7. Constant Current and Constant Voltage Battery Charger
SW
L1
33
μ
H
IN
FB
GND
SHDN
C1
68
μ
F
20V
D1
ES1B
1A 100V
J3
GND
U1
MIC4681
J4
12V/150mA
C2
0.1
μ
F
C4
68
μ
F
20V
C5
33
μ
F
35V
J1
+12V
J2
GND
SOP-8
5
8
4
3
2
1
R1
8.87k
R2
1k
C3
0.022
μ
F
50V
Figure 8. +12V to
12V/150mA Buck-Boost Converter
SW
L1*
50
μ
H
IN
FB
GND
SHDN
C2
470
μ
F
6.3V
C3
470
μ
F
6.3V
R7
3.01k
1%
C5
0.1
μ
F
D2
1N4148
R5
16k
1%
R6
16k 1%
C4
1000pF
R2
20m
R3
1k
1%
R4
1k
1%
R8
1.78k
1%
D1
5A
R1
1k
1%
3.3V/5A
GND
U1
MIC4681
U2
MIC4417BM4
3
Si4425DY
C1
100
μ
F
20V
C6
0.1
μ
F
50V
+4.5V to +17V
SHENABLE
SOP-8
5
8
4
2
1
* I
SAT
= 7.5A
U3
MIC6211BM5
Q1
Figure 9. 5V to 3.3V/5A Power Supply
* See Application Hint 37 at www.micrel.com for bills of material.
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