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SC2447 데이터시트(PDF) 13 Page - Semtech Corporation

부품명 SC2447
상세설명  Dual-Phase, Single or Dual Output Synchronous Step-Down Controller
PDF  26 Pages
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제조업체  SEMTECH [Semtech Corporation]
홈페이지  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC2447 데이터시트(HTML) 13 Page - Semtech Corporation

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© 2006 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC2447
Figure 5. SC2447 Start-up Timing Diagram
(a) Normal Start Up
(b) Pre-Biased Start Up
Figure 6. SC2447 UVLO Shutdown Timing Diagram
Timing Chart
4.3V
A
VCC
0.5V (V
REF)
V
REFSS
V
IN-
V
COMP
V
SS/EN
GDH
GDL
t16
t17
4.3V
A
VCC
0.5V (V
REF)
V
REFSS
V
IN-
V
COMP
V
SS/EN
GDH
GDL
t16
t17
GDH in high impedance state
1.25V
3.2V
Enable Hiccup
4.5V
A
VCC
1.5V
0.5V (V
REF)
V
REFSS
V
IN-
V
COMP
V
SS/EN
GDH
0
0
0
0
GDL
t1
t2
t3t4
t5 t6 t7
t0
GDH in high impedance state
1.25V
3.2V
Enable Hiccup
4.5V
A
VCC
1.5V
0.5V (V
REF)
V
REFSS
V
IN-
V
COMP
V
SS/EN
GDH
0
0
0
0
GDL
t1
t2 t4
t5
t6 t7
t0
GDH in high impedance state



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