MIC4575 Datasheet, PDF (6/12 Pages) Micrel Semiconductor – 200kHz Simple 1A Buck Voltage Regulator

MIC4575
6V to 24V
C1
22µF
35V
5
SHDN
2
SW
MIC4575BU
1
4
V_IN
FB
GND
3
L1
68µH
D1
R2
2.49k
1%
R1
1.50k
1%
MBRS130LT3
C1 AVX
TPSE226M035R0300, ESR = 0.3Ω
C2 AVX
TPSE337M006R0100, ESR = 0.1Ω
D1 Motorola MBRS130LT3
L1 Coiltronics CTX68-4P, DCR = 0.238Ω
3.3V/1A
C3
3300pF
C2
330µF
6.3V
Figure 4. 6V–24V to 3.3V/1A Buck Converter
Low-Profile Surface Mount
8V to 24V
C1
22µF
35V
5
SHDN
2
SW
MIC4575BU
1
4
V_IN
FB
GND
3
L1
68µH
D1
R2
3.01k
1%
R1
1.00k
1%
MBRS130LT3
C1 AVX
TPSE226M035R0300, ESR = 0.3Ω
C2 AVX
TPSE227M010R0100, ESR = 0.1Ω
D1 Motorola MBRS130LT3
L1 Coiltronics CTX68-4P, DCR = 0.238Ω
5V/1A
C3
3300pF
C2
220µF
10V
Figure 5. 8V–24V to 5V/1A Buck Converter
Low-Profile Surface Mount
16V to 24V
C1
10µF
50V
5
SHDN
2
SW
MIC4575BU
1
4
V_IN
FB
GND
3
L1
150µH
D1
SS26
R2
13.0k
1%
R1
1.50k
1%
12V/1A
C3
3300pF
C2
68µF
20V
C1 Tokin
C55YU1H106Z
C2 AVX
TPSE686M020R0150, ESR = 0.15Ω
D1 General Instruments SS26
L1 Coiltronics CTX150-4, DCR = 0.372Ω
Figure 6. 16V–24V to 12V/1A Buck Converter
Low-Profile Surface Mount
Micrel
6V to 24V
C1
150µF
35V
5 _SHDN
SW ²
MIC4575-3.3BU
1 _VIN
FB ⁴
GND
3
L1
3.3V/1A
68µH
D1
MBRS130LT3
C2
470µF
16V
C1 Sanyo
C2 Sanyo
D1 Motorola
L1 Coilcraft
L1 Bi
35CV150GX, ESR = 0.17Ω
16CV470GX, ESR = 0.17Ω
MBRS130LT3
DO3316P-683, DCR = 0.16Ω
HM77-11003, DCR = 0.233Ω
Figure 7. 6V–24V to 3.3V/1A Buck Converter
Lower-Cost Surface Mount
8V to 24V
C1
150µF
35V
5 _SHDN
SW ²
MIC4575-5.0BU
1 _VIN
FB ⁴
GND
3
L1
68µH
D1
MBRS130LT3
5V/1A
C2
470µF
16V
C1 Sanyo 35CV150GX, ESR = 0.17Ω
C2 Sanyo 16CV470GX, ESR = 0.17Ω
D1 Motorola MBRS130LT3
L1 Coilcraft DO3316P-683, DCR = 0.16Ω
L1 Bi
HM77-11003, DCR = 0.233Ω
4
Figure 8. 8V–24V to 5V/1A Buck Converter
Lower-Cost Surface Mount
16V to 24V
C1
47µF
50V
X2
5
SHDN
2
SW
MIC4575BU
1 _VIN
4
FB
GND
3
L1
150µH
SS26
12V/1A
R2
13.0k
1%
R1
1.50k
1%
C2
470µF
16V
C1 Nichicon UUX1H470MT1GS, ESR = 0.4Ω
C2 Sanyo 16CV470GX, ESR = 0.17Ω
D1 General Instruments SS26
L1 Coiltcraft DO5022P-154, DCR = 0.218Ω
Figure 9. 16V–24V to 12V/1A Buck Converter
Lower-Cost Surface Mount
8V to 18V
C1
150µF
35V
1 _VIN
2
SW
MIC4575-5.0BT
5 _SHDN
4
FB
GND
3
L1
10µH
C1 Nichicon UPL1V151MPH
ESR = 0.13Ω
C2 Nichicon UPL1C681MPH
ESR = 0.065Ω
D1 Motorola 1N5819
L1 Coiltronics PL52A-10-500
DCR = 0.045Ω
D1
1N5819
C2
680µF
16V
-5V/0.2A
Figure 10. 8V–18V to –5V/0.2A Buck-Boost Converter
Through Hole
April 1998•
4-111