LTC1983-3 LINER [Linear Technology], LTC1983-3 Datasheet - Page 9

• Manufacturer Part Number: LTC1983-3
• Description: 100mA REGULATED CHARGE-PUMP INVERTERS IN THINSOT
• Manufacturer: LINER [Linear Technology]

OPERATIO
problem in the low I
part in and out of shutdown at the minimum allowable
frequency (refer to Figure 3) for a given output load.
General Layout Considerations
Due to the high switching frequency and high transient
currents produced by the LTC1983, careful board layout is
a must. A clean board layout using a ground plane and
short connections to all capacitors will improve perfor-
mance and ensure proper regulation under all conditions
(refer to Figures 4a and 4b). You will not get advertised
performance with careless layout.
U
Q
(Refer to Block Diagram)
mode, it is necessary to switch the
V
OUT
V
OUT
1 V
2 V
3 C
Figure 4a. Recommended Component
Placement for a Single Layer Board
Figure 4b. Recommended Component
Placement for a Double Layer Board
TOP LAYER
IN
OUT
+
1
2
3
V
V
C
IN
OUT
+
SHDN 6
GND 5
C
C
C
OUT
FLY
–
4
SHDN
GND
C
–
V
IN
6
5
4
: 2.3V TO 5.5V
1000
BOTTOM LAYER
C
100
10
IN
1
LTC1983-3/LTC1983-5
1
C
C
C
1983 F04a
OUT
FLY
IN
OUTPUT CURRENT ( A)
SHDN ON PULSE WIDTH = 200 s
C
OUT
1983 F04b
10
= 10 F
Figure 3
100
1983 F03b
1000
sn1983 1983fs
9