MIC4574
L1
100µH
3
Micrel
3.3V/0.5A
5
5
SHDN
SW
12
L1
SHDN
SW
12
3.3V/0.5A
6V to 24V
C1
10µF
35V
10
MIC4574BWM
V
IN
FB
SGND PGND
4
6
R2
2.49k
1%
R1
1.50k
1%
C3
3300pF
100µH
3
D1
C2
330µF
6.3V
6V to 24V
C1
68µF
35V
10
MIC4574-3.3BWM
FB
V
IN
SGND PGND
4
6
D1
MBRS130LT3
C2
470µF
16V
MBRS130LT3
C1
C2
D1
L1
AVX
AVX
Motorola
Coiltronics
TPSD106M035R0300, ESR = 0.3Ω
TPSE337M006R0100, ESR = 0.1Ω
MBRS130LT3
CTX100-2P, DCR = 0.541Ω
C1
C2
D1
L1
Sanyo
Sanyo
Motorola
Coilcraft
35CV168GX, ESR = 0.34Ω
16CV470GX, ESR = 0.17Ω
MBRS130LT3
DO3316P-104, DCR = 0.23Ω
Figure 4. 6V–24V to 3.3V/0.5A Buck Converter
Low-Profile Surface Mount
L1
100µH
3
Figure 7. 6V–24V to 3.3V/0.5A Buck Converter
Low-Cost Surface Mount
5
SHDN
SW
12
5V/0.5A
R2
3.01k
1%
R1
1.00k
1%
5
L1
SHDN
SW
12
5V/0.5A
8V to 24V
C1
10µF
35V
10
MIC4574BWM
FB
V
IN
SGND PGND
4
6
C3
3300pF
100µH
3
D1
C2
220µF
10V
8V to 24V
C1
68µF
35V
10
MIC4574-5.0BWM
FB
V
IN
SGND PGND
4
6
D1
MBRS130LT3
C2
470µF
16V
MBRS130LT3
C1
C2
D1
L1
AVX
AVX
Motorola
Coiltronics
TPSD106M035R0300, ESR = 0.3Ω
TPSE227M010R0100, ESR = 0.1Ω
MBRS130LT3
CTX100-2P, DCR = 0.541Ω
C1
C2
D1
L1
Sanyo
Sanyo
Motorola
Coilcraft
35CV168GX, ESR = 0.34Ω
16CV470GX, ESR = 0.17Ω
MBRS130LT3
DO3316P-104, DCR = 0.23Ω
Figure 5. 8V–24V to 5V/0.5A Buck Converter
Low-Profile Surface Mount
L1
250µH
3
Figure 8. 8V–24V to 5V/0.5A Buck Converter
Low-Cost Surface Mount
L1
220µH
3
4
5
SHDN
SW
12
12V/0.5A
R2
13.0k
1%
R1
1.50k
1%
C3
3300pF
5
SHDN
SW
12
12V/0.5A
R2
13.0k
1%
R1
1.50k
1%
16V to 24V
C1
10µF
50V
10
MIC4574BWM
FB
V
IN
SGND PGND
4
6
D1
SS16
C2
68µF
20V
16V to 24V
C1
47µF
50V
10
MIC4574BWM
FB
V
IN
SGND PGND
4
6
D1
SS16
C2
470µF
16V
C1
C2
D1
L1
Tokin
C55Y5U1H106Z
AVX
TPSE686M020R0150, ESR = 0.15Ω
General Instruments SS16
Coiltronics CTX250-4P, DCR = 0.434Ω
C1
C2
D1
L1
Nichicon UUX1H470MNT1GS, ESR = 0.4Ω
Sanyo
16CV470GX, ESR = 0.17Ω
General Instruments SS16
Coilcraft
DO3316-224, DCR = 0.53Ω
Figure 6. 16V–24V to 12V/0.5A Buck Converter
Low-Profile Surface Mount
Figure 9. 16V–24V to 12V/0.5A Buck Converter
Low-Cost Surface Mount
April 1998•
4-97
MICREL [ MICREL SEMICONDUCTOR ]
