RT9267 데이터 시트보기 (PDF) - Richtek Technology
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RT9267 Datasheet PDF : 9 Pages
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Preliminary
RT9267
Typical Operating Characteristics
1.262
1.260
Feedback Voltage vs. Temperature
2nd PWM
1.258
1.256
1st PWM
1.254
1.252
VDD = 3.3V
1.250
-40
-20
0
20
40
60
80
Temperature (°C)
LX Pin On Resistance vs. VDD Pin Voltage
4.5
4.0
3.5
LX1 Pin
3.0
LX2 Pin
2.5
2.0
1.5
1.0
0.5
TA = 25°C
0.0
0
1
2
3
4
5
6
VDD Pin Voltage (V)
Switching Frequency vs. VDD Pin Voltage
1000
900
800
700
1st PWM
600
500
400
2nd PWM
300
200
FB1 = FB2 = GND
100 TA = 25°C
0
0
1
2
3
4
5
6
VDD Pin Voltage(V)
Switching Frequency vs. Temperature
580
560
2nd PWM
540
520
1st PWM
500
480
VDD = 3.3V
460
-40
-20
0
20
40
60
80
Temperature (°C)
Total Input Current (IIN) vs. Input Voltage
1600
1400
1200
1000
800
600
400
200 VOUT1 = 3.3V, VOUT2 = 18V @ No Load
( Refer to Typical Application Circuit )
0
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
Input Voltage (V)
DS9267-08 March 2007
Efficiency vs. Output Current
95
VIN = 3.2V
90
VIN = 2.8V
85
VIN = 1.8V
80
VIN = 2.0V
75
VOUT = 3.3V
VIN = 2.4V
TA = 25°C
70
1
10
100
Output Current (mA)
1000
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