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RK818 Datasheet(PDF) 20 Page - Rockchip Electronics Co., Ltd

Part # RK818
Description  Input range: 3.8V - 6V for USB input 2.7V - 4.5V for BAT input
PDF  93 Pages
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Manufacturer  ROCKCHIP [Rockchip Electronics Co., Ltd]
Direct Link  http://www.rock-chips.com/a/en/index.html
Logo ROCKCHIP - Rockchip Electronics Co., Ltd

RK818 Datasheet(HTML) 20 Page - Rockchip Electronics Co., Ltd

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RK818 Datasheet
Rev 1.0
Copyright ©2017 Fuzhou Rockchip Electronics Co., Ltd.
20
PARAMETERS
SYMBOL
CONDITION
MIN
TYP
MAX
UNIT
Load Regulation, IOUT2 = 200
mA to 4A
0.1
%/A
Line Regulation, VCC2 = 3 to
5.5V, IOUT2 = 2A
0.1
%/V
Rated output current
IMAX2
Reg90H<3:2>=<11
>
4
A
Switch Current Limit
ICL2
0.4A
step,
default=3.6A
3.2
4.4
A
Operating Quiescent Current,
No load, VDD=3.8V
IQ2
70
uA
Minimun Switch Current Limit
ICLMIN2
50mA
step,
default=150mA
50
400
mA
Minimum ON Time
Ton2(min)
45
ns
Soft-start Time
tSS2
Step=400us,
default=400us
400
800
us
COUT Discharge Switch ON
Resistance
RDIS2
250
ohm
Conversion
Efficiency
(Vin=3.8V,Vout=1.1V)
Iout=4A
Iout=3.5A
Iout=3A
Iout=2.5A
Iout=2A
Iout=1.5A
Iout=1 A
Iout=500mA
Iout=100 mA
Iout=10 mA
62
65
69
73
76
81
85
89
85
83
%
CH3：BUCK DC-DC CONVERTER (BUCK3)
Input supply voltage range
VINPUT3
2.7
5.5
V
Feedback
Voltage,
Default( Tj=25
℃ )
VFB3(Default)
0.98
1.00
1.02
V
Feedback Voltage, Default(-
10
℃≦Tj≦+85℃)
VFB3(Default)
0.97
1.00
1.03
V
Power Good threshold (Vout
rising)
VPG3
93
%
Output under voltage lockout
(Vout falling)
VUV3
85
%
Output over voltage lockout
(Vout rising)
VOV3
117
%
Load
Regulation,
IOUT3
=
100mA to 2.5A
0.1
%/A
Line Regulation, VCC3 = 3 to
5.5V, IOUT3 = 2A
0.1
%/V



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