RT2872
Typical Operating Characteristics
Efficiency vs. Output Current
100
90
0.810
0.808
Reference Voltage vs. Input Voltage
Reference Voltage (V)
80
Efficiency (%)
70
60
50
40
30
20
10
0
0
0.5
1
V
IN
=
V
IN
=
V
IN
=
V
IN
=
V
IN
=
5V
12V
24V
30V
36V
0.805
0.803
0.800
0.798
0.795
0.793
V
OUT
= 3.3V, R
T
= 113k
0.790
1.5
2
2.5
3
4
8
V
IN
= 4.5V to 36V, I
OUT
= 0A, R
T
= 113k
12
16
20
24
28
32
36
Output Current (A)
Input Voltage (V)
Reference vs. Temperature
0.810
3.300
3.295
Output Voltage vs. Output Current
Reference Voltage (V)
3.290
Output Voltage (V)
0.805
3.285
3.280
3.275
3.270
3.265
3.260
0.800
0.795
V
IN
=
V
IN
=
V
IN
=
V
IN
=
4.5V
12V
24V
36V
V
IN
=
V
IN
=
V
IN
=
V
IN
=
V
IN
=
5V
12V
24V
30V
36V
V
OUT
= 3.3V, I
OUT
= 0A, R
T
= 113k
0.790
-50
-25
0
25
50
75
100
125
3.255
3.250
0
0.5
1
1.5
V
OUT
= 3.3V, R
T
= 113k
2
2.5
3
Temperature (°C)
Output Current (A)
Switching Frequency vs. Input Voltage
520
600
Switching Frequency vs. Temperature
Switching Frequency (kHz)
1
580
560
540
520
500
480
460
440
420
400
-50
-25
0
Switching Frequency (kHz)
1
515
510
505
500
495
490
485
V
IN
=
V
IN
=
V
IN
=
V
IN
=
4.5V
12V
24V
36V
V
OUT
= 3.3V, I
OUT
= 0A, R
T
= 113k
480
4
8
12
16
20
24
28
32
36
V
OUT
= 3.3V, I
OUT
= 0A, R
T
= 113k
25
50
75
100
125
Input Voltage (V)
Temperature (°C)
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS2872-06 January 2018
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
