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RT9705 Datasheet(PDF) 2 Page - Richtek Technology Corporation

No. de pieza RT9705
Descripción Electrónicos  The RT9705 is a dual input single output power multiplexer
PDF  11 Pages
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Fabricante Electrónico  RICHTEK [Richtek Technology Corporation]
Página de inicio  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9705 Datasheet(HTML) 2 Page - Richtek Technology Corporation

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RT9705
2
DS9705-07 April 2011
www.richtek.com
Typical Application Circuit
STAT
D1
VIN1
VIN2
VOUT
GND
RT9705
0.1uF
V
IN1
R1
R
LOAD
C
OUT
0.1uF
V
IN2
Switch Status
D0
ILIM
R
ILIM
1
2
3
4
5
6
7
8
V
OUT
Pin Name
Pin Function
VIN1
Power Input1 Voltage
VIN2
Power Input2 Voltage
VOUT
Output Voltage
GND
Ground
STAT
STAT is an open-drain output that is Hi-Z if the VIN2 switch is ON.
D0, D1
The truth table shown below illustrates the functionality of D0 and D1.
ILIM
A resistor RILIM from ILIM to GND sets the current limit ILIM to (500/RILIM).
Functional Pin Description
D1
D0
VIN2>VIN1
STAT
VOUT
0
0
X
Hi-Z
VIN2
0
1
No
0
VIN1
0
1
Yes
Hi-Z
VIN2
1
0
X
0
VIN1
1
1
X
0
0
Table 1. Truth Table
Note
: 1. X: Don’ t care
2. Hi-Z: High impedance node
3. D0 and D1 cannot be floating which will lead to an unknown state.
4. An internal MOSFET with 2k
Ω RDS(ON) turns on and softly discharges the output voltage when D0 = D1 = 1.



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