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RT8280 データシート(PDF) 7 Page - Richtek Technology Corporation

部品番号 RT8280
部品情報  3A, 24V, 3MHz Step-Down Converter
PDF  16 Pages
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メーカー  RICHTEK [Richtek Technology Corporation]
ホームページ  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8280 データシート(HTML) 7 Page - Richtek Technology Corporation

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RT8280
7
DS8280-02 March 2012
www.richtek.com
©
Copyright 2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Current Limit vs. Duty Cycle
3.50
3.75
4.00
4.25
4.50
4.75
5.00
5.25
5.50
5.75
6.00
6.25
6.50
0
2040
6080
100
Duty Cycle (%)
fSW = 2.2MHz
fSW = 400kHz
Current Limit vs. Temperature
3.0
3.5
4.0
4.5
5.0
5.5
6.0
-50
-25
0
25
50
75
100
125
Temperature (°C)
VIN = 12V, VOUT = 3.3V, fSW = 2.2MHz
Switching Frequency vs. Temperature
1.8
1.9
2.0
2.1
2.2
2.3
2.4
-50
-25
0
25
50
75
100
125
Temperature (°C)
VIN = 12V, VOUT = 3.3V, RRT = 24k
Ω
Time (200ns/Div)
VOUT
(10mV/Div)
VSW
(5V/Div)
VIN = 12V, VOUT = 3.3V
lOUT = 3A, fSW = 2.2MHz
Output Ripple Voltage
IL
(2A/Div)
Time (100
μs/Div)
VOUT
(200mV/Div)
VIN = 12V, VOUT = 3.3V
lOUT = 0A to 3A, fSW = 2.2MHz
Load Transient Response
IOUT
(1A/Div)
Time (100
μs/Div)
VOUT
(200mV/Div)
VIN = 12V, VOUT = 3.3V
lOUT = 1.5A to 3A, fSW = 2.2MHz
Load Transient Response
IOUT
(1A/Div)



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