AS1336 austriamicrosystems, AS1336 Datasheet - Page 15

• Manufacturer Part Number: AS1336
• Description: Dual, Low Voltage, Micropower Dc-dc Step-up Converters
• Manufacturer: austriamicrosystems

AS1336
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
Capacitor Selection
Low ESR capacitors should be used to minimize V
they have extremely low ESR and are available in small footprints. A 2.2 to 10µF output capacitor is sufficient for most
applications. Larger values up to 22µF may be used to obtain extremely low output voltage ripple and improve tran-
sient response.
An additional phase lead capacitor may be required with output capacitors larger than 10µF to maintain acceptable
phase margin. X5R and X7R dielectric materials are recommended due to their ability to maintain capacitance over
wide voltage and temperature ranges.
Low ESR input capacitors reduce input switching noise and reduce the peak current drawn from the battery. Ceramic
capacitors are recommended for input decoupling and should be located as close to the device as is practical. A 4.7µF
input capacitor is sufficient for most applications. Larger values may be used without limitations.
Table 5. Recommended Capacitors
PCB Layout Guidelines
The high-speed operation of the AS1336 requires proper layout for optimum performance.
www.austriamicrosystems.com/DC-DC_Step-Up/AS1336
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C
C
Name
OUT1
A large ground pin copper area will help to lower the device temperature.
A multi-layer board with a separate ground plane is recommended.
Traces carrying large currents should be direct.
Trace area at pin FB should be as small as is practical.
The lead-length to the battery should be as short as is practical.
OUT2
,
GRM31CR70J106KA01L
JMK212BJ226MG-T
Part Number
Value
10µF
22µF
OUT
Rated Voltage
ripple. Multi-layer ceramic capacitors are recommended since
Revision 1.01
6.3V
6.3V
Type
X7R
X5R
1206
0805
Size
Murata
www.murata.com
Taiyo Yuden
www.t-yuden.com
Manufacturer
15 - 18