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SC121 数据表(PDF) 13 Page - Semtech Corporation

部件名 SC121
功能描述  Low Voltage Synchronous Boost 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

SC121 数据表(HTML) 13 Page - Semtech Corporation

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SC121
13
Typical Characteristics (continued)
Time = (400ns/div)
V
OUT
= 3.3V, V
IN
= 1.5V, I
OUT
= 50mA
V
OUT
ripple
(10mV/div)
I
L
(100mA/div)
V
LX
(5V/div)
Time = (100μs/div)
V
OUT
= 3.3V, V
IN
= 1.5V, T
A
=25°C
I
OUT
= 40mA to
140mA
(50mA/div)
V
OUT
(100mV/div)
AC Coupled
Load Transient
PWM Operation
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0
20
40
60
80
100
V
IN
(V)
R
1
= 931kΩ, R
2
= 294kΩ, L = 4.7μH, C
FB
= 22pF
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0
20
40
60
80
100
120
140
160
V
IN
(V)
R
1
= 931kΩ, R
2
= 294kΩ, L = 4.7μH, C
FB
= 22pF
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
Startup Max Load Current vs. V
IN (Any VOUT)
Startup Min Load Res. vs. V
IN (Any VOUT)
VOUT = 3.3V, IOUT = 1mA
0.6
0.65
0.7
0.75
0.8
0.85
0.9
-40
-20
020
40
60
80
100
Temperature (°C)
Min. Start-up Voltage vs. Temperature (Any V
OUT)



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