r1230d RICOH Co.,Ltd., r1230d Datasheet - Page 17

• Manufacturer Part Number: r1230d
• Description: Pwm/vfm Step-down Dc/dc Converter With Synchronous Rectifier
• Manufacturer: RICOH Co.,Ltd.

14) Duty Cycle at VFM Mode vs. Temperature
15) Lx Transistor On Resistance vs. Temperature
16) Limit Voltage vs. Temperature
17) Load Transient Response
Rev. 1.12
80
75
70
65
60
55
50
-4.00E-05
0.75
0.25
0.45
0.35
0.25
0.15
0.5
0.5
0.4
0.3
0.2
0.1
-60
1
0
-60
-60
-2.00E-05
I
OUT
=0A
-40
-40
-40
0.00E+00
Pch Tr. On Resistance
-20
-20
-20
2.00E-05
4.00E-05
0
0
0
- 17 -
Temperature Topt
Temperature Topt
Time[sec]
Temperature Topt
6.00E-05
20
20
20
8.00E-05
Nch Tr. On Resistance
I
( C)
( C)
OUT
( C)
=100mA
40
40
40
1.00E-04
R1230D181B V
60
60
60
1.20E-04
IN
=5.0V PWM
V
IN
=3.0V
80
1.40E-04
80
80
0.6
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
100
100
100