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SC4530 Datasheet(PDF) 20 Page - Semtech Corporation

Part # SC4530
Description  30V, 300mA Output Micropower Step-Down Switching Regulator
PDF  23 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4530 Datasheet(HTML) 20 Page - Semtech Corporation

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20
SC4530
SC4530
SW
BST
IN
BIAS
OUT
2.5V/0.3A
R1
205k
VIN
3.2V - 30V
200k
R2
L1
33µH
EN
C3
0.47µF
C2
10µF
GND
FB
C1
47µF
C4
33pF
OFF ON
C5
47pF
L1: Coilcraft LPS4018
C2: Murata GRM32ER61H106K
C1: Murata GRM21BR60G476M
C4=33pF C5=100pF Verified 1/27/2011
C4=33pF C5=47pF to reduce start-up overshoot 3/14/2012
L1: Coilcraft LPS4018
C1: Murata GRM31CR60G107M
SC4530
SW
BST
IN
BIAS
OUT
1.8V/0.3A
R1
93.1k
VIN
3.1V - 20V
200k
R2
L1
33µH
EN
C3
0.22µF
C2
4.7µF
GND
FB
C1
100µF
C4
33pF
OFF ON
L1 changed from 22uH to 33uH 1/17/2012
C2: Murata GRM32ER71H475K
L1: Coilcraft LPS4018
C1: Sanyo POSCAP 4TPE150MAUB
SC4530
SW
BST
IN
BIAS
OUT
1.23V/0.3A
VIN
3.3V - 20V
L1
33µH
EN
C3
0.22µF
C2
4.7µF
GND
FB
C1
150µF
OFF ON
C2: Murata GRM32ER71H475K
Verified 2/17/2011
SC4530
SW
BST
IN
BIAS
OUT
12V/0.3A
R1
866k
VIN
14V - 30V
100k
R2
L1
68µH
EN
C3
0.22µF
C2
4.7µF
GND
FB
C1
4.7µF
C4
10pF
OFF ON
C5
100pF
L1 changed from 47uH to 68uH 1/16/2012
L1: Coilcraft LPS6225
C1: Murata GRM31CR61C475K
C2: Murata GRM32ER71H475K
* LPS4018 68uH saturation current is marginally low
Change C4 from 22pF to 10pF and C5 from 470pF to 100pF, 3/15/2012
Typical Application Circuits (Continued)
Figure 15. 1.23V Output Step-Down Converter
Figure 16. 1.8V Output Step-Down Converter
Figure 17. 2.5V Output Step-Down Converter
Figure 19. 12V Output Step-Down Converter
SC4530
SW
BST
IN
BIAS
OUT
9V/0.3A
R1
931k
VIN
10V - 30V
147k
R2
L1
47mH
EN
C3
0.22mF
C2
4.7mF
GND
FB
C1
10mF
C4
6.8pF
OFF ON
C5
68pF
L1: Coilcraft LPS4018
C1: Murata GRM31CR61C106K
C2: Murata GRM32ER71H475K
Figure 18. 9V Output Step-Down Converter



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