RT2875A/B
Typical Operating Characteristics
Efficiency vs. Load Current
100
90
80
3.37
3.36
Output Voltage vs. Load Current
Efficiency (%)
70
60
50
40
30
20
10
0
0
V
IN
= 5V
V
IN
= 12V
V
IN
= 23V
V
IN
= 30V
V
IN
= 36V
Output Voltage (V)
3.35
3.34
3.33
3.32
3.31
V
IN
= 12V
V
IN
= 5V
V
IN
= 24V
V
IN
= 30V
V
IN
= 36V
V
OUT
= 3.3V
V
OUT
= 3.3V
3.30
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
Load Current (A)
Load Current (A)
Referecnec Voltage vs. Input Voltage
0.610
0.608
0.65
0.64
Reference Voltage vs. Temperature
Referecnec Voltage (V)
0.605
0.603
0.600
0.598
0.595
0.593
Reference Voltage (V)
0.63
0.62
0.61
0.60
0.59
0.58
0.57
0.56
0.55
-50
-25
0
V
IN
= 4.5V to 36V, V
OUT
= 3.3V, I
OUT
= 0A
0.590
2
9.6
17.2
24.8
32.4
40
V
IN
= 12V, V
OUT
= 1.2V, I
OUT
= 0A
25
50
75
100
125
Input Voltage (V)
Temperature (°C)
Switching Frequency vs. RT
2000
600
Switching Frequency vs. Input Voltage
Switching Frequency (kHz)
1
590
580
570
560
550
540
530
520
510
500
4
Switching Frequency (kHz)
1
1800
1600
1400
1200
1000
800
600
400
200
0
20
40
60
80
100
120
140
160
180
200
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0A
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0A, RT = 100kΩ
8
12
16
20
24
28
32
36
RT(k
Ω
)
Input Voltage (V)
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS2875A/B-08 November 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
