RT5112A
Buck1 Switching Frequency vs. Load Current
3.0
Buck1 Power On
SCL
(2V/Div)
2.5
VINB1
(1V/Div)
VINB1 = 4.35V
VINB1 = 3.8V
VINB1 = 3.4V
2.0
1.5
1.0
0.5
0.0
VINB1 = 3.8V, VBUCK1 = 1.1V, IBUCK1 = 0mA
VBUCK1
(500mV/Div)
IIN
VBUCK1 = 1.1V
0.8 1.0 1.2
(50mA/Div)
0.0
0.2
0.4
0.6
Time (200μs/Div)
Load Current (A)
Buck1 Load Transient
Buck1 Power Off
SCL
(2V/Div)
VINB1
(1V/Div)
VBUCK1
(50mV/Div)
VBUCK1
(500mV/Div)
IBUCK1
(200mA/Div)
VINB1 = 3.8V, VBUCK1 = 1.1V, IBUCK1 = 0mA
IIN
VINB1 = 3.8V, VBUCK1 = 1.1V,
IBUCK1 = 240mA to 960mA (tR = tF = 1μs)
(50mA/Div)
Time (50μs/Div)
Time (2ms/Div)
Buck2 Quiescent Current vs. Input Voltage
Buck2 Quiescent Current vs. Temperature
16
15
14
13
12
11
10
16
15
14
13
12
11
10
VBUCK2 = 2.85V, Temperature = 25°C
VINB2 = 3.8V, VBUCK2 = 2.85V
-50
-25
0
25
50
75
100
125
3.0
3.5
4.0
4.5
5.0
Temperature (°C)
Input Voltage (V)
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS5112A-02 August 2019
www.richtek.com
15
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
