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RT9953 Datasheet(PDF) 8 Page - Richtek Technology Corporation

Part # RT9953
Description  41 CH Power Management IC
PDF  19 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9953 Datasheet(HTML) 8 Page - Richtek Technology Corporation

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RT9953
8
DS9953-02 April 2011
www.richtek.com
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Oscillator
CH1,2,3,4 Operating Frequency
fOSC
900
1000
1100
kHz
CH1 Maxim um Duty Cycle (Step-Up)
VFB1 = 0.7V
80
83
86
%
CH2 Maxim um Duty Cycle (Step-Up)
VFB2 = 0.7V
80
83
86
%
CH2 Maxim um Duty Cycle
(Step-Down)
VFB2 = 0.7V
--
--
100
%
CH3 Maxim um Duty Cycle
(Step-Down)
VFB3 = 0.7V
--
--
100
%
CH4 Maxim um Duty Cycle
(Step-Down)
VFB4 = 0.7V
--
--
100
%
Feedback Regulation Voltage
Feedback Regulation Voltage @ FB1,
FB2, FB3, FB4, FB5
0.788
0.8
0.812
V
Total Accuracy (Including load
regulation and line regulation)
−3
--
3
%
Power Switch
P-MOSFET, PVDD1 = 3.3V
--
200
250
CH1 On Resistance of MOSFET
RDS(ON)
N-MOSFET, PVDD1 = 3.3V
--
150
200
m
Ω
CH1 Current Limitation (Step-Up)
--
3
--
A
P-MOSFET, PVDD2 = 3.3V
--
200
250
CH2 On Resistance of MOSFET
RDS(ON)
N-MOSFET, PVDD2 = 3.3V
--
150
200
m
Ω
CH2 Current Limitation (Step-Down)
--
1.8
--
A
CH2 Current Limitation (Step-Up)
--
3
--
A
P-MOSFET, PVDD3 = 3.3V
--
350
400
CH3 On Resistance of MOSFET
R
DS(ON)
N-MOSFET, PVDD3 = 3.3V
--
300
400
m
Ω
CH3 Current Limitation (Step-Down)
--
1.5
--
A
P-MOSFET, PVDD4 = 3.3V
--
350
400
CH4 On Resistance of MOSFET
R
DS(ON)
N-MOSFET, PVDD4 = 3.3V
--
300
400
m
Ω
CH4 Current Limitation (Step-Down)
--
1.5
--
A
2.2V ≦ PVDD5 ≦ 2.7V,
IOUT = 400mA
--
160
320
CH5 Dropout Voltage (LDO)
VDrop
2.7V ≦ PVDD5 ≦ 5.5V,
IOUT = 500mA
--
250
400
mV
Protection
Over Voltage Protection of CH1, CH2
Step-Up, PVDD1 and PVDD2
5.7
6
6.25
V
Over Voltage Protection Hysteresis of
CH1, CH2 Step-Up, PVDD1 and
PVDD2
--
0.5
--
V
Under Voltage Protection (CH1 to
CH5)
FB Threshold
0.36
0.4
0.44
V
2.2V ≦ PVDD5 ≦ 2.7V
0.4
0.7
1.05
CH5 Current Limit
ILIM
2.7V ≦ PVDD5 ≦ 5.5V
0.5
0.8
1.05
A
Protection Fault Delay
--
100
--
ms
To be continued



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