MIC4575 Micrel Semiconductor, MIC4575 Datasheet - Page 9

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

MIC4575
U1 Micrel
U2 National
C1 Nichicon
C2 Nichicon
D1 Motorola
D2 Motorola
D3 Motorola
L1 Coiltronics PL52B-68-500, DCR = 0.095
R1 KRL
Q1 Siliconix
V
I
U1 Micrel
U2 National
U3 Micrel
C1 Nichicon
C2 Nichicon
D1 Motorola
D2 Motorola
D3 Motorola
L1 Coiltronics PL52B-68-500, DCR = 0.095
R1 KRL
Q1 Siliconix
V
8V to 24V
OUT
150µF
IN min
IN min
8V to 24V
35V
C1
150µF
V
35V
C1
IN
V
IN
1.23V
R4
V
V
BATT
BATT
5
1
5
1
SHDN
V
MIC4575BT
LM358
UPL1V151MPH, ESR = 0.12
UPL1C331MPH, ESR = 0.12
1N5819
1N5819
1N4148
SP-1-A1-0R100J
VN2222LL
MIC4575BT
LM358
LM4041CIZ-1.2
UPL1V151MPH, ESR = 0.12
UPL1C331MPH, ESR = 0.12
1N5819
1N5819
1N4148
SP-1-A1-0R100J
VN2222LL
R2
R1
IN
SHDN
V
/ 0.9
MIC4575-BT
/ 0.9
IN
MIC4575-BT
GND
GND
3
2.5V
2.5V
3
SW
FB
Figure 17. 0.1A–1A Variable-Current Battery Charger
SW
FB
2
4
2
4
R7
1k
R6
1k
Figure 18. 1A Battery Charger (2–8 Cells)
C4
1000pF
R6
3k
1N4148
1N4148
C4
1000pF
1
D3
D3
R5
3k
0.01µF
C3
D1
1N5819
1
1N5244
0.01µF
C3
2
DZ1
4-114
3
14V
D1
1N5819
68µH
L1
1/2LM358
6
5
U2A
1N5244
V
IN
2
8
4
3
DZ1
14V
68µH
100
1.21k
L1
1/2LM358
1%
1%
R2
R4
1/2 LM358
U2A
U2B
7
0.1
Q1
VN2222LL
R3
10k
R1
100
1%
R2
7
1.21k
Q1
VN2222LL
0.1
R3
10k
R1
1%
R4
V
8
4
IN
1/2 LM358
C2
330µF
16V
5
6
U2B
1N5819
C2
330µF
16V
D2
V
IN
R5
10k
VR1
10k
1N5819
0.1A to 1A
D2
I
OUT
2-8 Cells
U3
LM4041CIZ-1.2
V
BATT
I
OUT
1A
2-8 Cells
V
BATT
April 1998•
Micrel