MIC4575 Micrel Semiconductor, MIC4575 Datasheet - Page 12

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

April 1998•
MIC4575
U1 Micrel
U2 National
U3 National
U4 National
C1 Nichicon
C1 Nichicon
D1 Motorola
D2 Motorola
DZ1 Motorala
L1 Bi
R1 KRL
Q1 Siliconix
I
I
V
I
I
OUT
OUT
OUT
OUT
IN min
END
END
=
= 1.02A
> =
1.24V
R3
12V to 24V
150µF
60mA
1.23V
9V to 18V
V
V
35V
MIC4575BT
LM358
LM3420
LM339
UPL1V151MPH, ESR = 0.12
UPL1C331MPH, ESR = 0.12
1N5819
1N5819
1N5244
HM77-11003, DCR = 0.233
SP-1/2-A1-0R100J
VN2222LL
BATT
0.9
C1
IN
V
22µF
35V
IN
C1
U1 Micrel
U2 Micrel
C1 AVX
C2 AVX
C3 AVX
C4 Sprague
D1 Motorola
D2 Motorola
L1 Bi
L2 Coilcraft
R2
R1
+ 2.5V
5
1
R2
R3
U1
SHDN
V
5
1
IN
MIC4575BT
SHDN
V
R1
–
U1
IN
MIC4575BU
GND
Figure 24. Lithium-Ion Battery Charger with End-of-Charge Flag
R5
R4
MIC4575BU
MIC29150-5.0BU
TPSE226M035R0300, ESR = 0.3
TPSE227M010R0100, ESR = 0.1
TPSE106M010R0200, ESR = 0.2
293D226X0010C2W
MBRS130LT3
MBRS130LT3
HM77-11003, DCR = 0.233
D016087C-102, DCR = 0.05
3
GND
3
SW
FB
SW
FB
Figure 25. Low Output-Noise Regulator (<1mV)
2
4
1/2 LM358
2
4
R7
1k
END
U2B
D1
MBRS130LT3
5
6
68µH
1000pF
L1
V
R6
3k
C4
IN
R8
10k
1N4148
D3
V
IN
C6
0.1µF
8
4
1
7
D1
1N5819
R2
3.92k
1%
R1
1.00k
1%
V
10M
C5
0.1µF
IN
R9
12
3
6.0V
4-117
1/2LM358
0.01µF
1
C3
U2A
C3
3300pF
68µH
7
6
LM339
L1
V
OUT
= 1.23
3
2
C2
220µF
10V
R10
10k
1µH
1.21k
L2
100
C7
0.01µF
1%
1%
R3
R2
1 +
Q1
VN2222LL
0.1
R2
R1
C3
100µF
10V
R1
2N2222
Q2
1.0k
1%
R5
1
U2
V
R4
13.0k
1%
IN
MIC29150
0.01µF
GND
C2
330µF
16V
2
C8
V
OUT
1N5819
R12
100k
D2
1
3
3
COMP
OUT
U3
LM3420
5V/1A
V
C4
22µF
10V
OUT
GND
IN
8
4
V
2 Li Cells
BATT
I
1A
OUT
Micrel
4