RT7274/79/80/81
Switching Frequency vs. Temperature
Switching Frequency vs. Input Voltage
700
690
680
670
660
650
640
630
620
610
600
700
690
680
670
660
650
640
630
VIN = 12V, VOUT = 1.05V, IOUT = 0.7A
VIN = 12V, VOUT = 1.05V, IOUT = 0.7A
-50
-25
0
25
50
75
100
125
4
6
8
10
12
14
16
18
Temperature (°C)
Input Voltage (V)
Current Limit vs. Temperature
Current Limit vs. Input Voltage
5.0
4.5
4.0
3.5
3.0
2.5
2.0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
RT7281
RT7280
RT7279
RT7274
RT7281
RT7280
RT7279
RT7274
VIN = 12V, VOUT = 1.05V
50 75 100 125
VIN = 12V, VOUT = 1.05V
12 14 16
4
6
8
10
18
-50
-25
0
25
Input Voltage (V)
Temperature (°C)
UVLO Threshold vs. Temperature
Enable Voltage vs. Temperature
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
1.6
1.5
1.4
1.3
1.2
1.1
1.0
Rising
Rising
Falling
Falling
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS7274/79/80/81-01 February 2013
www.richtek.com
13
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
