R1232D RICOH [RICOH electronics devices division], R1232D Datasheet - Page 17

• Manufacturer Part Number: R1232D
• Description: PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER
• Manufacturer: RICOH [RICOH electronics devices division]

7) Lx Transistor On Resistance vs. Input Voltage
8) Turn-on speed by CE pin
CE
5V/div
V
1V/div
IL
200mA/div
OUT
0.14
0.13
0.12
0.11
0.10
0.09
1.10
1.05
1.00
0.95
0.90
Switching Tr. Pch on Resistance
2.5
2.5
3.0
3.0
R1232D121A
R1232D331B
3.5
3.5
Input Voltage V
Input Voltage V
V
IN
=5.0V, L=4.7µH Rload=0Ω
4.0
4.0
200µs/div
4.5
4.5
IN
IN
5.0
5.0
(V)
(V)
I
I
OUT
OUT
=600mA
=200mA
5.5
5.5
6.0
6.0
Synchronous Rectifier Tr. Nch on Resistance
CE
5V/div
V
1V/div
IL
200mA/div
OUT
0.14
0.13
0.12
0.11
0.10
0.09
2.4
2.3
2.2
2.1
2.0
2.5
2.5
3.0
3.0
R1232D121A
R1232D331B
3.5
3.5
Input Voltage V
Input Voltage V
V
IN
=5.0V, L=4.7µH Rload=12Ω
4.0
4.0
200µs/div
4.5
4.5
IN
IN
5.0
5.0
(V)
(V)
I
I
OUT
OUT
=600mA
=200mA
5.5
5.5
R1232D
6.0
6.0
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