RT9275 Просмотр технического описания (PDF) - Richtek Technology
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RT9275 Datasheet PDF : 14 Pages
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Preliminary
RT9275
Typical Operating Characteristics
Frequency vs. Temperature
500
450
400
350
300
250
200
150
100
50
VIN = 2V, VOUT = 3.3V, ILOAD = 60mA
0
-20 -10 0 10 20 30 40 50 60 70 80 90
Temperature (°C)
1.252
Feedback vs. Temperature
1.25
1.248
1.246
VIN = 2V, VOUT = 3.3V, ILOAD = 60mA
1.244
-20
0
20
40
60
80
Temperature (°C)
Current Limit vs. Temperature
2.6
2.4
2.2
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2 VIN = 2V, VOUT = VDD = 3.3V
0
-20 -10 0 10 20 30 40 50 60 70 80 90
Temperature (°C)
Efficiency vs. Output Current
100
95
90
85
80
75
70
65
60
55
VOUT = 5V, TA = 25°C
50
1
10
VIN = 4.5V
VIN = 4.0V
VIN = 3.5V
VIN = 3.0V
VIN = 2.5V
VIN = 2.0V
VIN = 1.5V
100
1000
Output Current (mA)
Efficiency vs. Output Current
95
90
85
80
VIN = 3.0V
75
VIN = 2.5V
70
VIN = 2.0V
VIN = 1.5V
65
VIN = 1.0V
60
55
VOUT = 3.3V, TA = 25°C
50
1
10
100
Output Current (mA)
1000
Output Voltage vs. Output Current
3.32
3.31
3.3
3.29
3.28
3.27
VIN = 3.0V
VIN = 2.5V
VIN = 2.0V
VIN = 1.5V
VIN = 1.0V
3.26
VOUT = 3.3V
3.25
1
10
100
Output Current (mA)
1000
DS9275-06 March 2007
www.richtek.com
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