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RT9971 Datasheet(PDF) 9 Page - Richtek Technology Corporation

Part # RT9971
Description  7 CH Power Management IC
PDF  22 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9971 Datasheet(HTML) 9 Page - Richtek Technology Corporation

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DS9971-01 April 2011
www.richtek.com
RT9971
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Oscillator
CH1,2,3,4, 5, 6, 7 Operating Frequency
fOSC
900
1000
1100
kHz
CH1 Maximum Duty Cycle (Step-Up)
VFB1 = 0.7V
80
83
86
%
CH2 Maximum Duty Cycle (Step-Up)
VFB2 = 0.7V
80
83
86
%
CH2 Maximum Duty Cycle (Step-Down)
VFB2 = 0.7V
--
--
100
%
CH3 Maximum Duty Cycle (Step-Down)
VFB3 = 0.7V
--
--
100
%
CH4 Maximum Duty Cycle (Step-Down)
VFB4 = 0.7V
--
--
100
%
CH5 Maximum Duty Cycle (Step-Up)
VFB5 = 1.15V
91
94
97
%
CH6 Maximum Duty Cycle (Inverting)
VFB6 = 0.1V
91
94
97
%
CH7 Maximum Duty Cycle (WLED)
VFB7 = 0.15V
91
94
97
%
Feedback Regulation Voltage
Feedback Regulation Voltage @ FB1,
FB2, FB3, FB4
0.788
0.8
0.812
V
Feedback Regulation Voltage @ FB5
1.237
1.25
1.263
V
Feedback Regulation Voltage @ FB6
(Inverting)
-15
0
15
mV
Feedback Regulation Voltage @ CFB7
0.237
0.25
0.263
V
OK Sink Current
OK = 1V
50
--
--
µA
Reference
VREF Output Voltage
VREF
1.237
1.25
1.263
V
VREF Load Regulation
0
µA < IREF < 200µA
--
--
10
mV
Negative Charge Pump
PVDD6 Low Threshold to Start Pump
3.4
3.6
3.8
V
PVDD6 Hysteresis Gap to Stop Pump
0.1
0.3
0.5
V
(PVDD6
− PNEG) Clamped Voltage
PVDD6 = 3.3V
4.1
4.5
4.9
V
Power Switch
P-MOSFET, PVDD1 = 3.3V
--
150
--
CH1 On Resistance of MOSFET
RDS(ON)
N-MOSFET, PVDD1 = 3.3V
--
150
--
m
Ω
CH1 Current Limitation (Step-Up)
--
3
--
A
P-MOSFET, PVDD2 = 3.3V
--
150
--
CH2 On Resistance of MOSFET
RDS(ON)
N-MOSFET, PVDD2 = 3.3V
--
150
--
m
Ω
CH2 Current Limitation (Step-Down)
--
1.5
--
A
CH2 Current Limitation (Step-Up)
--
3
--
A
P-MOSFET, PVDD3 = 3.3V
--
200
--
CH3 On Resistance of MOSFET
R DS(ON)
N-MOSFET, PVDD3 = 3.3V
--
200
--
m
Ω
CH3 Current Limitation (Step-Down)
--
1.5
--
A
P-MOSFET, PVDD4 = 3.3V
--
200
--
CH4 On Resistance of MOSFET
R DS(ON)
N-MOSFET, PVDD4 = 3.3V
--
200
--
m
Ω
CH4 Current Limitation (Step-Down)
--
1.5
--
A
CH5 Load Disconnect MOSFET
P-MOSFET, SW5I = 3.3V
--
0.5
--
Ω
CH5 On Resistance of MOSFET
N-MOSFET
--
0.5
--
Ω
CH5 Current Limitation
N-MOSFET
--
1.2
--
A
To be continued



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