MIC4575 Micrel Semiconductor, MIC4575 Datasheet - Page 11

• Manufacturer Part Number: MIC4575
• Description: 200kHz Simple 1A Buck Voltage Regulator
• Manufacturer: Micrel Semiconductor

MIC4575
8V to 24V
150µF
V
35V
IN
C1
5
1
U1 Micrel
U2 National
U3 Micrel
C1 Nichicon
C1 Nichicon
D1 Motorola
D2 Motorola
DZ1 Motorala
L1 Bi
Q1 Siliconix
R1 KRL
U1
SHDN
V
IN
4V to 24V
MIC4575BT
V
GND
IN
3
150µF
35V
C1
MIC4575BT
LM358
MIC2506BM
UPL1V151MPH, ESR = 0.12
UPL1C331MPH, ESR = 0.12
1N5819
1N5819
1N5236
HM77-11003, DCR = 0.233
VN2222LL
SP-1/2-A1-0R100J
SW
FB
Figure 22. Improved Adjustable Output-Voltage Regulator (0V–12V)
U1 Micrel
U2 National
C1 Nichicon
C2 Nichicon
D1 Motorola
L1 Bi
2
4
5
1
1/2 LM358
U1
SHDN
V
IN
R6
1k
U2B
MIC4575BT
GND
5
6
1000pF
3
R5
3k
C4
MIC4575BT
LM358
UPL1V151MPH, ESR = 0.12
UPL1C102MPH, ESR = 0.047
1N5819
HM77-11003, DCR = 0.233
Figure 23. Switchable Battery-Pack Charger
1N4148
SW
1/2LM358
20k
R3
1%
FB
D3
V
IN
8
4
2
4
U2B
7
D1
1N5819
6
5
C5
0.01µF
1/2LM358
0.01µF
1
C3
U2A
D1
1N5819
R4
1%
V
2k
IN
68µH
8
4
L1
1N5236
7
7.5V
DZ1
68µH
L1
3
2
4-116
C4
0.01µF
1.21k
100
1%
R4
1%
V
V
R1 = R3 and R2 = R4
R2
10K
IN min
OUT max
R5
Q1
VN2222LL
2
3
0.1
A/B
10k
R1
R3
= 1.23V
C3
3300pF
Bat A
Bat B
=
U2A
1/2LM358
V
100k
0.9
OUT
1
R7
1
+ 2.5V
7404
U4A
2
1
C2
330µF
16V
2
3
1
4
R8
100k
20k
1%
R6
220
1%
R2
R1
2k
I
CTL B
FLG A
FLG B
CTL A
OUT
1A
R2
R1
U3
MIC2506
GND
C2
1000µF
16V
IN
7
6
OUT A
OUT B
V
510k
OUTmin
R6
330
0.5W
R9
0V–12V
8
5
V
OUT
= 60mV
Bat B
4 Cells
NiCad
R10
510k
April 1998•
Micrel
Bat A
4 Cells
NiCad