RT5112A
Buck2 Load Transient
LDO Quiescent Current vs. Input Voltage
25
24
23
22
21
20
VBUCK2
(50mV/Div)
LDO4
LDO3
LDO2
LDO1
IBUCK2
(200mA/Div)
VINB2 = 3.8V, VBUCK2 = 2.85V,
IBUCK2 = 240mA to 960mA (tR = tF = 1μs)
VLDO1/VLDO2 = 2.8V, VLDO3/VLDO4 = 1.8V,
Temperature = 25°C
2.5
0.00
0.00
3.0
3.5
4.0
4.5
5.0
5.5
Time (50μs/Div)
Input Voltage (V)
LDO Quiescent Current vs. Temperature
LDO1 Load Regulation
30
28
26
24
22
20
18
16
2.802
2.800
2.798
2.796
2.794
2.792
2.790
2.788
2.786
LDO4
LDO3
LDO2
LDO1
VIN12 = 4.35V
VIN12 = 3.8V
VIN12 = 3.4V
VIN12 = 3V
VIN12/VIN3/VIN4 = 3.8V,
VLDO1/VLDO2 = 2.8V, VLDO3/VLDO4 = 1.8V
VLDO1 = 2.8V
-50
-25
0
25
50
75
100
125
0.05
0.10
0.15
0.20
0.25
0.30
Temperature (°C)
Load Current (A)
LDO2 Load Regulation
LDO3 Load Regulation
2.802
2.800
2.798
2.796
2.794
2.792
2.790
2.788
2.786
1.798
1.796
1.794
1.792
1.790
1.788
1.786
1.784
VIN12 = 4.35V
VIN12 = 3.8V
VIN12 = 3.4V
VIN12 = 3V
VIN3 = 4.35V
VIN3 = 3.8V
VIN3 = 3V
VIN3 = 2.8V
VIN3 = 2.5V
VIN3 = 1.95V
VLDO2 = 2.8V
0.25 0.30
VLDO3 = 1.8V
0.00
0.05
0.10
0.15
0.20
0.05
0.10
0.15
0.20
0.25
0.30
Load Current (A)
Load Current (A)
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS5112A-02 August 2019
www.richtek.com
17
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