RT7255
Switching Frequency. vs. Input Voltage
600
PWM
650
PWM
Switching Frequency vs. Temperature
Switching Frequency (kHz)
1
630
610
590
570
550
530
510
490
470
450
-50
-25
0
25
50
75
V
OUT
= 1.2V
100
125
V
IN
= 18V
V
IN
= 12V
V
IN
= 6V
V
IN
= 4.5V
Switcing Frequency (kHz)1
590
580
570
560
550
540
530
520
510
500
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
V
OUT
= 1.2V, I
OUT
= 0A
Input Voltage (V)
Temperature (°C)
Current Limit vs. Temperature
3.0
2.8
2.6
Current Limit (A)
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
-50
-25
0
25
50
75
100
125
V
IN
= 18V
V
IN
= 12V
V
IN
= 6V
Temperature (°C)
Copyright © 2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS7255-01
November 2017
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
