100
90
80
70
60
50
40
30
20
10
0
R1230D251B
Vin=3.3V PWM
Vin=3.3V VFM
Vin=5.0V PWM
Vin=5.0V VFM
1
10
100
1000
Output Current IOUT[mA]
3) Ripple Voltage vs. Output Current
COUT=10uF Tantalum Capacitor ESR=400mohm
R1230D181A
0.06
0.04
0.02
0
-0.02
-0.04
-0.06
-0.08
-1.00E-06 0.00E+00 1.00E-06 2.00E-06 3.00E-06 4.00E-06 5.00E-06 6.00E-06 7.00E-06 8.00E-06
Time [sec]
PWM Mode
VIN=5.0V IOUT=200mA
80
70
60
50
40
30
20
10
0
VIN=5.0V
IN
V =3.3V
0
50
100
150
200
250
300
350
400
450
500
R1230D181B
Output Current IOUT[mA]
COUT=10µF Tantalum Capacitor ESR=400mΩ
COUT=10uF Ceramic Capacitor ESR=220mohm
R1230D181B
0.04
0.03
0.02
0.01
0
-0.01
-0.02
-0.03
-0.04
-1.00E-06 0.00E+00 1.00E-06 2.00E-06 3.00E-06 4.00E-06 5.00E-06 6.00E-06 7.00E-06 8.00E-06
Time [sec]
PWM Mode
VIN=5.0V IOUT=200mA
Rev. 1.12
- 13 -
RICOH [ RICOH ELECTRONICS DEVICES DIVISION ]
