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RT9971 Datasheet(PDF) 4 Page - Richtek Technology Corporation

Part # RT9971
Description  7 CH Power Management IC
PDF  22 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9971 Datasheet(HTML) 4 Page - Richtek Technology Corporation

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DS9971-01 April 2011
www.richtek.com
RT9971
Timing Diagram
For Li-ion
Note :
(1) SEL = Low, CH2 is Step -Down, CN Pull High
(2) VBAT = 2.7V to 4.2V
VDDM
EN2, EN134
VOUT_CH1 5V
VOUT_CH3 2.5V
VOUT_CH4 1.8V
VOUT_CH2 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
→
→
→
→
→
→
Power On Sequence : CH1 Step -Up 5V
CH3 Step -Down 2.5V
CH4 Step -Down 1.8V
CH2 Step -Down 3.3V
Power Off Sequence : CH2 Step -Down 3.3V
CH4 Step -Down 1.8V
CH3 Step -Down 2.5V
CH1 Step -Up 5V
5V
PVDD1
FB2
OK
FB1
LX2
PVDD2
PNEG
SW5O
SW5I
LX5
36
31
20
30
15
25
RT9971
10
µF/25V
VBAT
FB5
3.3V
10
µF
PVDD3
13
14
C1
C4
C14
L5
L2
4.7
µH
10
µH
10
µF x 2
COMP1
COMP2
VBAT
LX3
21
L3
4.7
µH
10
µF
C10
2.5V
FB3
23
11
PVDD4
LX4
10
L4
4.7
µH
10
µF
C13
1.8V
FB4
8
1nF
C15
15V
L6
10
µH
63.4k
11.3k
10
µF/16V x 2
0.1
µF
2
LX6
7
FB6
16
VREF
18
RTC_R
10k
17 SEL
EN5
EN6
OFF
ON
4
CP
5
CN
12
9
6
32
33
38
34
37
C9
C12
C18
C19
R7
R8
R9
R10
R11
R12
R13
R14
R16
10uF/25V
C16
1000k
90.9k
4.7pF
C2
470k
R1
88.7k
R2
39k
R3
560pF
C3
10
µF
C5
470k
R4
150k
R5
15k
R6
2200pF
C7
10pF
C6
10
µF
C8
768k
360k
22pF
VBAT
10
µF
C11
470k
374k
33pF
26
24
28
VBAT
LX7
VOUT7
CFB7
1
µF/16V
C20
10
R15
L7
D1
D2
10
µH
PVDD6 3
VBAT
LX1
1
40
VDDM
VBAT
L1
2.2
µH
29
15V
1nF
WLED
VBAT
or 5V
RTC Reset
19
RTC_PWR
RTC 3.25V
EN134
EN7
22
10k
R18
VBAT
VBAT
-7V
VOUT1
35
RTC 3.25V
0.22F
C21
10
µF
C22
1
µF
C23
1
µF
C24
D3
D4
C17
D5
1
µF
C26
1
µF
C25
VOUT_CH1
VOUT_CH2
VOUT_CH3
VOUT_CH4
VOUT_CH5
VOUT_CH6
27, Exposed Pad (41)
GND
39 EN2
VBAT



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