RT7285/A
Typical Operating Characteristics
Efficiency vs. Load Current
Reference Voltage vs. Input Voltage
100
0.610
0.608
0.605
0.603
0.600
0.598
0.595
0.593
0.590
90
80
70
VIN = 5V
IN = 9V
VIN = 12V
IN = 18V
60
V
50
40
30
20
10
0
V
VOUT = 1.2V
VIN = 4V to 18V, IOUT = 1A
0.001
0.01
0.1
1
10
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
Switching Frequency vs. Input Voltage
0.610
0.605
0.600
0.595
0.590
600
590
580
570
560
550
540
530
520
510
500
VIN = 9V
VIN = 12V
VIN = 18V
VOUT = 1.2V, IOUT = 0.5A
50 75 100 125
VOUT = 1.2V, IOUT = 0.5A
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
-50
-25
0
25
Input Voltage (V)
Temperature (°C)
Switching Frequency vs. Temperature
Current Limit vs. Temperature
550
540
530
520
510
500
490
480
470
460
450
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
VIN = 6V
VIN = 12V
VIN = 18V
VIN = 6V
VIN = 12V
VIN = 18V
VOUT = 1.2V, IOUT = 0.5A
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
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6
DS7285/A-03 March 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
