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RT9705B 데이터시트(PDF) 2 Page - Richtek Technology Corporation

부품명 RT9705B
상세설명  The RT9705B is a dual input single output power
PDF  12 Pages
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제조업체  RICHTEK [Richtek Technology Corporation]
홈페이지  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9705B 데이터시트(HTML) 2 Page - Richtek Technology Corporation

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RT9705B
2
DS9705B-03 April 2011
www.richtek.com
Typical Application Circuit
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
Notes for Table 1.
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.
STAT
D1
VIN1
VIN2
VOUT
GND
RT9705B
0.1uF
VIN1
R1
RLOAD
COUT
0.1uF
VIN2
Switch Status
D0
ILIM
RILIM
1
2
3
4
5
6
7
8
VOUT
D0
D1



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