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RT9705B Datasheet(PDF) 4 Page - Richtek Technology Corporation

Part # RT9705B
Description  The RT9705B is a dual input single output power
PDF  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9705B Datasheet(HTML) 4 Page - Richtek Technology Corporation

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RT9705B
4
DS9705B-03 April 2011
www.richtek.com
Function Block Diagram
Control
Logic
+
-
+
-
Charge
Pump
Charge
Pump
+
-
+
-
+
+
+
-
VDD
UVLO
VIN2
UVLO
VIN1
UVLO
Thermal
Sense
Internal
VDD
Q1 is OFF
EN1
EN2
V
TH
0.5V
VOUT
VIN1
VIN2
STAT
VIN2
VIN1
ILIM
D0
D1
0.1V
Q2 is OFF
VOUT>VIN
Q2 is ON
Current
Sence
V
f = 0
V
f = 0
Q1
Q2
GND
Timing Diagram
10%
90%
tr
tPLH1
tf
tPHL1
VOUT
D0-D1
Q1, Q2 Off
Q1, Q2 Enabled
Q1, Q2 Off
10%
90%
0V
3.3V
3.4V
4.8V
tt
5V
D0-D1
Q1 Enabled
Q2 Enabled
VOUT
3.3V
3.4V
5V
4.65V
D0-D1
Q1Enabled
Q2 Enabled
Q1 Enabled
tPLH2
tPHL2
VOUT
(a)
(b)
(c)



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