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SC4530 数据表(PDF) 19 Page - Semtech Corporation

部件名 SC4530
功能描述  30V, 300mA Output Micropower Step-Down Switching Regulator
PDF  23 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SC4530 数据表(HTML) 19 Page - Semtech Corporation

Back Button SC4530 Datasheet HTML 15Page - Semtech Corporation SC4530 Datasheet HTML 16Page - Semtech Corporation SC4530 Datasheet HTML 17Page - Semtech Corporation SC4530 Datasheet HTML 18Page - Semtech Corporation SC4530 Datasheet HTML 19Page - Semtech Corporation SC4530 Datasheet HTML 20Page - Semtech Corporation SC4530 Datasheet HTML 21Page - Semtech Corporation SC4530 Datasheet HTML 22Page - Semtech Corporation SC4530 Datasheet HTML 23Page - Semtech Corporation  
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9
SC4530
SC4530
SW
BST
IN
BIAS
OUT
3.3V/0.3A
R1
332k
VIN
4V - 30V
200k
R2
L1
33µH
EN
C3
0.22µF
C2
4.7µF
GND
FB
C1
22µF
C4
22pF
OFF ON
C5
47pF
L1: Coilcraft LPS4018
C2: Murata GRM32ER71H475K
C1: Murata GRM31CR60J226K
C4=10pF C5=47pF Verified 1/13/2012
C4=22pF C5=47pF Verified 1/26/2011
C4=22pF C5=47pF to reduce start-up overshoot 3/14/2012
(a)
Typical Application Circuits (Continued)
OUT_IL_24V to 3.3V_ld_tran_0-300mA_C4=22pF_C5=47pF
SW_OUT_IL_24V to 3.3V@100uA_C4=22pF_C5=47pF
SW_OUT_IL_24V to 3.3V@60mA_C4=22pF_C5=47pF
SW_OUT_IL_24V to 3.3V@300mA_C4=22pF_C5=47pF
400ms/div
(b)
V
OUT
50mV/div
AC Coupled
I
L1
200mA/div
V
SW
20V/div
V
OUT
20mV/div
AC Coupled
I
L1
200mA/div
V
SW
20V/div
V
OUT
10mV/div
AC Coupled
I
L1
200mA/div
V
SW
20V/div
4ms/div
(c)
1ms/div
(d)
(a) 3.3V Output Step-Down Converter
(b) Switching Waveforms of the Figure 14(a) Circuit. V
IN = 24V, IOUT = 100mA
(c) V
IN = 24V, IOUT = 60mA
(d) V
IN = 24V, IOUT = 300mA
(e) Load Transient. V
IN = 24V, IOUT is Switched Between 0 and 300mA
Figure 14.
V
OUT
200mV/div
AC Coupled
I
L1
200mA/div
40ms/div
(e)



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