RT9261B
Preliminary
Start-up/Hold-on Voltage vs. Output Current
Start-up/Hold-on Voltage Vstart/Vhold (V)
2.5
4.0
3.5
2
Output Voltage vs. Output Current
3.0V
1.5V
1.0V
2.0V
2.5V
Output Voltage (V)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
1.5
V
start
1
0.5
V
hold
V
OUT
= 3.3V
L = 100uH
0
20
40
60
80
100
120
0
V
OUT
= 3.3V
L = 100uH
50
100
150
200
Output Current (mA)
Output Current (mA)
Output Current vs. Ripple Voltage
300
2.0V
250
3.0V
90
80
Output Current vs. Ripple Voltage
Ripple Voltage (mVp-p)
200
150
100
50
0
0
1.5V
1.0V
50
100
V
OUT
= 3.3V
C
OUT
= 20uF
L = 100uH
150
200
2.5V
Ripple Voltage (mVp-p)
70
60
50
40
30
20
10
0
0
1.5V
50
100
1.0V
2.0V
2.5V
3.0V
V
OUT
= 3.3V
C
OUT
= 68uF
L = 100uH
150
200
Output Current (mA)
Output Current (mA)
Output Current vs. Ripple Voltage
18
16
2.5V
2.0V
3.0V
100
90
80
70
1.0V
Efficiency vs. output Current
3.0V
1.0V
2.5V
Ripple Voltage (mVp-p)
14
12
10
8
6
4
2
0
0
Efficiency (%)
1.5V
2.0V
60
50
40
30
1.5V
V
OUT
= 3.3V
C
OUT
= 170uF
L = 100uH
100
150
200
20
10
0
0
50
100
V
OUT
= 3.3V
L = 100uH
150
200
50
Output Current (mA)
Output Current (mA)
www.richtek-ic.com.tw
DS9261B-03 September 2001
6
ETC [ ETC ]
