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SC4530 Fiches technique(PDF) 18 Page - Semtech Corporation

No de pièce SC4530
Description  30V, 300mA Output Micropower Step-Down Switching Regulator
PDF  23 Pages
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Fabricant  SEMTECH [Semtech Corporation]
Site Internet  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4530 Fiches technique(HTML) 18 Page - Semtech Corporation

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8
SC4530
Typical Application Circuits
L1: Coilcraft LPS4018
C2: Murata GRM32ER71H475K
C1: Murata GRM31CR60J226K
SC4530
SW
BST
IN
BIAS
OUT
5V/0.3A
R1
619k
VIN
6V - 30V
200k
R2
L1
33mH
EN
C3
0.22mF
C2
4.7mF
GND
FB
C1
22mF
C4
10pF
OFF ON
C5
33pF
C4=22pF C5=68pF Verified 1/24/2011
C4=10pF C5=33pF Verified 1/12/2012
(a)
SW_OUT_IL_12V to 5V@300mA_C4=10pF_C5=33pF
V
OUT
10mV/div
AC Coupled
I
L1
200mA/div
V
SW
10V/div
1ms/div
SW_OUT_IL_12V to 5V@10uA_C4=10pF_C5=33pF
V
OUT
20mV/div
AC Coupled
I
L1
200mA/div
V
SW
10V/div
1ms/div
SW_OUT_IL_12V to 5V@60mA_C4=10pF_C5=33pF
4ms/div
V
OUT
50mV/div
AC Coupled
I
L1
200mA/div
V
SW
10V/div
OUT_IL_12V to 5V_ld_tran_0-300mA_C4=10pF_C5=33pF
V
OUT
200mV/div
AC Coupled
I
L1
200mA/div
40ms/div
(a) 5V Output Step-Down Converter
(b) Switching Waveforms of the Figure 13(a) Circuit. V
IN = 12V, IOUT = 10mA
(c) V
IN = 12V, IOUT = 60mA
(d) V
IN = 12V, IOUT = 300mA
(e) Load Transient. V
IN = 12V, IOUT is Switched Between 0 and 300mA
Figure 13.
(b)
(c)
(d)
(e)



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