Datasheet

MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
13
Maxim Integrated
It is important to connect the GND pin, the input
bypass-capacitor ground lead, and the output filter-
capacitor ground lead to a single point (star ground
configuration) to minimize ground noise and improve
regulation. Also, minimize lead lengths to reduce stray
capacitance, trace resistance, and radiated noise, with
preference given to the feedback circuit, the ground
circuit, and LX_. Place feedback resistors R1–R4 as
close as possible to their respective feedback pins.
Place the input bypass capacitor as close as possible
to AVCC and GND.
LXN
V
CC
PVP
C5
1.0μF
C6
0.22μF
C4
22μF
C2
4.7μF
C3
1μF
C1
2.2μF
V
BATT
(2.7V ~ 5V)
FAULT
V
BATT
REF
FBN
14
12
10
8
R3
187kΩ
1%
R4
30.9kΩ
1%
R5
100kΩ
R1
1.4MΩ
1%
R2
100kΩ
1%
V
INV
V
BST
13
511
1
9
2
3
4
6
7
ONBST
ONINV
REF
V
INV
-7.5V AT 100mA
D2
CMHSH5-21
D1
CMHSH5-21
MAX8614A
MAX8614B
LXP
SEQ
GND PGND
V
BST
+15V AT 50mA
L2
4.7μH
L1
2.2μH
FBP
FLT
AVCC
Figure 1. Typical Application Circuit