Preliminary
RT9261B
Typical Operating Charateristics
Start-up/Hold-on Voltage vs. Output Current
Output Voltage vs. Output Current
2.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.0V
2.5V
2.0V
2
1.5V
1.0V
1.5
Vstart
1
Vhold
0.5
VOUT = 3.3V
VOUT = 3.3V
L = 47uH
L = 47uH
0
0
0
0
30
60
90
120
150
180
0
50
100
150
200
Output Current (mA)
Output Current (mA)
Output Current vs. Ripple Voltage
Output Current vs. Ripple Voltage
300
250
200
150
100
50
90
80
70
60
50
40
30
20
10
0
3.0V
2.0V
2.5V
2.0V
3.0V
2.5V
1.5V
1.5V
VOUT = 3.3V
COUT = 20uF
L = 47uH
VOUT = 3.3V
OUT = 68uF
L = 47uH
1.0V
50
C
1.0V
50
0
100
150
200
0
100
150
200
Output Current (mA)
Output Current (mA)
Efficiency vs. output Current
Output Current vs. Ripple Voltage
90
80
70
60
50
40
30
20
10
0
25
20
15
10
5
3.0V
2.5V
2.0V
1.0V
1.5V
2.5V
3.0V
1.0V
VOUT = 3.3V
OUT = 170uF
VOUT = 3.3V
L = 47uH
C
2.0V
1.5V
L = 47uH
0
50
100
150
200
0
50
100
150
200
Output Current (mA)
DS9261B-03 September 2001
www.richtek-ic.com.tw
5
ETC [ ETC ]
