RT7285B
Typical Operating Characteristics
Efficiency vs. Load Current
100
90
Reference Voltage vs. Input Voltage
0.610
0.608
Reference Voltage (V)
V
OUT
= 1.2V
80
0.605
0.603
0.600
0.598
0.595
0.593
Efficiency (%)
70
60
50
40
30
20
10
0
0.001
0.01
0.1
V
IN
=
V
IN
=
V
IN
=
V
IN
=
5V
9V
12V
18V
V
IN
= 4V to 18V, I
OUT
= 1A
0.590
10
1
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
Load Current (A)
Input Voltage (V)
Reference Voltage vs. Temperature
0.610
600
Switching Frequency vs. Input Voltage
Switching Frequency (kHz)
1
590
580
570
560
550
540
530
520
510
500
4
5
6
7
8
Reference Voltage (V)
0.605
0.600
V
IN
= 9V
V
IN
= 12V
V
IN
= 18V
0.595
V
OUT
= 1.2V, I
OUT
= 0.5A
0.590
-50
-25
0
25
50
75
100
125
V
OUT
= 1.2V, I
OUT
= 0.5A
9 10 11 12 13 14 15 16 17 18
Temperature (°C)
Input Voltage (V)
Switching Frequency vs. Temperature
550
3.0
2.8
2.6
Current Limit vs. Temperature
Switching Frequency (kHz)
1
540
530
520
510
500
490
480
470
460
450
-50
-25
0
25
50
75
100
125
Current Limit (A)
V
IN
= 6V
V
IN
= 12V
V
IN
= 18V
2.4
2.2
2.0
1.8
1.6
1.4
V
IN
= 6V
V
IN
= 12V
V
IN
= 18V
V
OUT
= 1.2V, I
OUT
= 0.5A
1.2
1.0
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS7285B-03 March 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
