RT9903GQV RICHTEK [Richtek Technology Corporation], RT9903GQV Datasheet - Page 2

• Manufacturer Part Number: RT9903GQV
• Description: 5 Channel DC/DC Converters IC with High-Efficiency Step-Up
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT9903
Typical Application Circuit
2-AA Battery 1.8V to 3.2V
www.richtek.com
2
C5 to C8
10uFx4
WLED
(12V)
3.3V_Motor
4.7nF
1.2k
R5
C10
VBATT
R15
10
130k
300k
R3
R2
500pF
C11
10uF
C3
C12
6.8nF
R6
2.2k
SS0520
Chip Enable
10uF
1uF
C2
SS0520
1nF
C4
D2
C9
10uF
C1
C13
56nF
D1
1.2k
R7
VBATT
Si2302
4.7uH
L2
C14
4.7nF
Q1
R8
R1
2.7k
10k
L1
4.7uH
R4
11
21
16
13
14
12
15
19
23
10
4
9
6
5
7
8
LX3
RT
AGND
PGND
FB3
CS4
EXT4
FB4
EN1
EN2
EN3
EN4
COMP2
COMP3
COMP4
COMP1
VDD
Preliminary
17
RT9903
C15
4.7uF
FB-CP
INCD
FB1
FB2
LX1
LX2
CX
18
20
24
22
2
1
3
C16
10uF
68nF
C24
10uF
C19
VBATT
VCC
3.3V
4.7uH
L3
SS0520
D6
L4
4.7uH
SS0520
SS0520
SS0520
5.1M
2.2M
D4
360k
R11
R12
D5
D3
R9
R10
200k
750k
R14
330k
R13
1uF
C27
1nF
C17
C20
1nF
C21 to C23
10uFx3
DS9903-07 August 2007
C25 to C26
10uFx2
+12V (+LCD)
10uF
C18
-7.5V (-CCD)
+15V (+CCD)