RT7237A
Typical Operating Characteristics
Efficiency vs. Output Current
100
90
Output Voltage vs. Input Voltage
3.320
3.315
Output Voltage (V)
80
Efficiency (%)
70
60
50
40
30
20
10
0
0.01
0.1
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 17V
3.310
3.305
3.300
3.295
3.290
3.285
V
OUT
= 3.3V
3.280
1
10
V
OUT
= 3.3V, I
OUT
= 1A
4
6
8
10
12
14
16
18
Output Current (A)
Input Voltage (V)
Reference Voltage vs. Temperature
0.85
0.84
3.38
3.36
Output Voltage vs. Output Current
Reference Voltage (V)
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
-50
-25
0
25
50
75
100
125
3.24
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 17V
Output Voltage (V)
3.34
3.32
3.30
3.28
3.26
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 17V
V
OUT
= 3.3V, I
OUT
= 1A
3.22
0
0.25
0.5
0.75
1
RT7237AH, V
OUT
= 3.3V
1.25
1.5
1.75
2
Temperature (°C)
Output Current (A)
Switching Frequency vs. Input Voltage
380
380
Switching Frequency vs. Temperature
Switching Frequency (kHz)
1
370
360
350
340
330
320
310
Switching Frequency (kHz)
1
370
360
350
340
330
320
310
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 17V
I
OUT
= 0.5A
300
4
6
8
10
12
14
16
18
300
-50
-25
0
25
50
75
I
OUT
= 0.5A
100
125
Input Voltage (V)
Temperature (°C)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7237A-01
September 2012
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
