RT5047
Under Voltage Lockout vs. Temperature
Over Current Protect vs. Temperature
0.70
0.65
0.60
0.55
0.50
8.00
7.80
7.60
7.40
7.20
7.00
V
= 12V, V
75
= 13.3V
LNB
IN
-25
0
25
50
100
125
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
Tone Output
Output Voltage Transition Rising
V
LNB
(5V/Div)
V
= 12V V
= 0.1F, V
from 0V to 3.3V,
from 13V to 18V
IN
SEL
LNB
C
LNB
V
LNB_ac
(200mV/Div)
V
SEL
(2V/Div)
V
= 12V
IN
Time (50s/Div)
Time (500s/Div)
Output Voltage Transition Falling
Power On Sequence
V
LNB
(5V/Div)
V
IN
(10V/Div)
V
= 12V, V
from 3.3V to 0V,
from 18V to 13V
IN
SEL
LNB
CLNB = 1F, V
V
BOOST
V
SEL
(10V/Div)
(2V/Div)
V
LNB
(10V/Div)
V
= 12V
IN
Time (500s/Div)
Time (5ms/Div)
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is a registered trademark of Richtek Technology Corporation.
DS5047-02 July 2017
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9
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