AAT3119_07 ANALOGICTECH [Advanced Analogic Technologies], AAT3119_07 Datasheet - Page 15

• Manufacturer Part Number: AAT3119_07
• Description: High Efficiency 2X Charge Pump
• Manufacturer: ANALOGICTECH [Advanced Analogic Technologies]

Layout Considerations
For the AAT3119, the high charge pump switching
frequencies and large peak transient currents
require careful printed circuit board layout. As a
general rule for charge pump boost converters, the
three external capacitors should be located as
closely as possible to the device package with min-
imum length trace connections. Maximize ground
plane around the AAT3119 charge pump and make
sure all external capacitor are connected to the
3119.2007.02.1.2
Flash Enable
Enable
V
IN
Figure 3: Flash LED Driver with Gated Flash Application.
1μF
C
IN
EN
IN
AAT3119
GND
C
1μF
FLY
OUT
4.5V
immediate power ground plane. A local component
side ground plane is recommended. If this is not
possible due to layout area limitations, assure
good ground connections by the use of large or
multiple printed circuit board vias.
Refer to the basic AAT3119 evaluation board lay-
out shown in Figure 4 and the evaluation board
schematic shown in Figure 5 for an example of the
recommended charge pump layout design.
High Efficiency 2X Charge Pump
C
1μF
OUT
R
L
R
F
Flash LED
AAT3119
15