Rainbow Electronics MAX1802 - Manual (Page 27)

MAX1802
Digital Camera Step-Down
Power Supply
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R C
G
C
MAX1802
+ OUTPUT
- OUTPUT
R1
R2
Q1
INPUT
1 CELL
Li+
MAIN
ON
COMP
DCON
EXT
FB
Figure 10. Auxiliary Controller, Flyback Configuration
R C
G C
MAX1802
V
OUT
-
V OUT +
D3
D2 2
D1
C3
C2
R1
R2
C1
Q1
L
INPUT
1 CELL
Li+
Main
ON
COMP
DCON
EXT
FB
Figure 11. Auxiliary Controller, Charge-Pump Configuration
Pin Configuration
MAX1802
TQFP
TOP VIEW
32 28 29 30 31 25 26 27
REF FBC COMPC VL GND VDDC LXC PGND
10 13 15 14 16 11 12 9
PGNDM DCON1
OSC ON1 DL1 FB1
COMP1
FB2
17
18
19
20
21
22
23 DCON3
24 ONC
FB3
COMP3
DL3
DL2
DCON2
COMP2
2
3
4
5
6
7
8 DLM
LXM
DHM
VDDM
VH
ONM
COMPM
1 FBM