RT7235/36/39/40
Typical Operating Characteristics
Efficiency vs. Output Current
100
Efficiency vs. Output Current
100
RT7235/39
90
80
RT7236/40
90
80
Efficiency (%)
60
50
40
30
20
10
0
0.001
0.01
0.1
Efficiency (%)
70
70
60
50
40
30
20
V
IN
= 5V
V
IN
= 12V
V
IN
= 18V
V
IN
= 5V
V
IN
= 12V
V
IN
= 18V
V
OUT
= 1.05V
1
10
10
0
0.001
0.01
0.1
V
OUT
= 1.05V
1
10
Output Current (A)
Output Current (A)
Output Voltage vs. Input Voltage
1.060
1.058
1.056
Feedback Threshold Voltage vs. Temperature
0.780
Feedback Threshold Voltage (V)
0.775
0.770
0.765
0.760
0.755
Output Voltage (V)
1.054
1.052
1.050
1.048
1.046
1.044
1.042
1.040
4
6
8
10
12
14
16
18
V
IN
= 4.5V to 18V, V
OUT
= 1.05V
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 0A
0.750
-50
-25
0
25
50
75
100
125
Input Voltage (V)
Temperature (°C)
Output Voltage vs. Output Current
1.10
1.09
1.08
Output Voltage vs. Output Current
1.10
1.09
1.08
RT7235/39
RT7236/40
Output Voltage (V)
1.07
1.06
1.05
1.04
1.03
1.02
1.01
1.00
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Output Voltage (V)
1.07
1.06
1.05
1.04
1.03
1.02
V
IN
= 18V
V
IN
= 12V
V
IN
= 5V
V
IN
= 18V
V
IN
= 12V
V
IN
= 5V
V
OUT
= 1.05V
1.01
1.00
0
0.5
1
1.5
2
2.5
3
3.5
V
OUT
= 1.05V
4
4.5
5
Output Current (A)
Output Current (A)
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS7235/36/39/40-00
March 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
