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RT9917 Datasheet(PDF) 3 Page - Richtek Technology Corporation

Part # RT9917
Description  7 Channel DC/DC Converters
PDF  20 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9917 Datasheet(HTML) 3 Page - Richtek Technology Corporation

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DS9917-03 April 2011
www.richtek.com
RT9917
Timing Diagram
Power On Sequence : CH1 Boost 5V
CH3 Buck 2.5V
CH4 Buck 1.8V
CH2 Buck 3.3V
Power Off Sequence : CH2 Buck 3.3V
CH4 Buck 1.8V
CH3 Buck 2.5V
CH1 Boost 5V
→
→
→
→
→
→
For Li-ion : CH2 3.3V is from VBAT
5V
FB2
OK134
FB1
LX2
PVDD2
GND
SW5O
SW5I
LX5
1
36
31
20
30
15
25
RT9917
VBAT
FB5
150k
3.3V
10uF
PVDD3
13
14
C1
C3
C8
R1
L5
L4
4.7uH
10uH
VOUT1
10uF x 2
COMP1
COMP2
VBAT
LX3
21
L2
4.7uH
10uF
C5
2.5V
FB3
23
11
PVDD4
LX4
10
L3
4.7uH
10uF
C7
1.8V
FB4
8
1nF
C9
16V
L7
10uH
68k
10.5k
4.7uF/16V
-8V
0.1uF
2
LX6
7
FB6
16
VREF
9
COMP6
75k
1nF
22
EN7
Dimming
EN134
EN2
EN5
EN6
OFF
ON
4
CP
5
CN
6
CPO
12
19
27
32
33
38
34
35
37
39
C4
C6
C12
C13
C14
R3
R4
R5
R6
R7
R8
R10
R11
R12
10uF/25V
C24
887k
75k
47pF
C11
4.7pF
C15
470k
R13
88.7k
R14
39k
R15
560pF
C16
10uF
C17
470k
R16
150k
R17
15k
R18
2.2nF
C19
10pF
C18
10uF
C20
768k
360k
22pF
VBAT
10uF
C21
470k
374k
33pF
18
SEQ
17
SEL
VBAT
26
24
28
VBAT
LX7
VOUT7
CFB7
1uF/16V
C10
10
R9
L6
D1
D2
D3
10uH
D4
PVDD6 3
VBAT
Power On
VBAT
PVDD1
LX1
40
VDDM
VBAT
L1
29
1uF
10uF
2.2uH
1uF
10uF/25V
1uF
1uF
C24
C25
C26
C27
VDDM
EN134, EN2
CH1 VOUT 5V
CH3 VOUT 2.5V
CH4 VOUT 1.8V
CH2 VOUT 3.3V
Wait until FB3 < 0.1V
IC shutdown
3.5ms
User define
Wait until FB4 < 0.1V
Wait until FB2 < 0.1V
3.5ms
3.5ms
3.5ms



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