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RT9901 Datasheet(PDF) 3 Page - Richtek Technology Corporation

Part # RT9901
Description  4 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down
PDF  19 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9901 Datasheet(HTML) 3 Page - Richtek Technology Corporation

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RT9901
Preliminary
3
DS9901-12 August 2007
www.richtek.com
Figure 2. Typical Application Circuit from 2-AA Battery Supply
2-AA Battery 2.0V to 3.4V
μC standby
3.3V/1mA
1.5V/300mA
VDD3
ENM
CX
FB3
CPFB
EN1
LX3
COMP1
SS
EN3
EN2
COMP2
COMP3
LX2
VDD2
LBI
LBO
FB1
VDD1
LX1
FB2
4.7
μH
14
20k
30k
4.7nF
1nF
1nF
4.7
μH
2.5V/300mA
Low Battery
Warning Output
(Open Drain)
2
3
32
1
30
15
13
5
64
23
24
21
22
28
27
29
25
26
8
10
20
12
11
17
18
19
9
RT9901
VDDC
10nF
1nF
47k
15k
10
μF
16
I/O 3.3V/500mA
3.3V
10
μF x 2
470k
150k
470k
100pF
220k
30k
1nF
100pF
200k
220k
4.7μH
VBAT
VBAT
VBAT
10
μF x 4
10
μF x 4
10
μF x 4
10
μF x 2
10
μF x 2
VBAT
SS0520
SS0520
SS0520
100pF
10
μF
Chip Enable
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
C1 to C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C13
C27 to C30
C15 to C16
C14
C21 to C22
D1
D2
D3
L1
L2
L3
C23 to C26
C17 to C20
1
μF
C12
7, 31,
Exposed Pad (33)



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