R1234D Datasheet, PDF (19/26 Pages) RICOH electronics devices division – PWM/VFM Step-Down DC/DC CONVERTER with Synchronous Rectifier

R1234D181A
300
200
Output Current 200mA 0mA
100
0
0.2
Output Voltage
0.1
0
-0.1
0
10 20 30 40
Time t (µs)
5) Turn on speed with CE pin
R1234D181A
PWM, IOUT=0mA
4
2
CE Input Voltage
0
2
1
0
Output Voltage
0 0.4 0.8 1.2 1.6 2.0 2.4 2.8
Time t(µs)
R1234D181A
PWM, IOUT=50mA
4
2
CE Input Voltage
0
2
1
0
Output Voltage
0 0.4 0.8 1.2 1.6 2.0 2.4 2.8
Time t(µs)
R1234D
R1234D181B
300
200
Output Current 200mA 0mA
100
0
0.2
Output Voltage
0.1
0
-0.1
0
10 20 30 40
Time t (µs)
R1234D181B
PWM, IOUT=0mA
4
2
CE Input Voltage
0
2
1
0
Output Voltage
0 0.4 0.8 1.2 1.6 2.0 2.4 2.8
Time t(µs)
R1234D181B
PWM, IOUT=50mA
4
2
CE Input Voltage
0
2
1
0
Output Voltage
0 0.4 0.8 1.2 1.6 2.0 2.4 2.8
Time t(µs)
19