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AS1310 데이터시트(PDF) 23 Page - ams AG

부품명 AS1310
상세설명  Ultra Low Quiescent Current, Hysteretic DC-DC Step-Up Converter
PDF  30 Pages
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제조업체  AMSCO [ams AG]
홈페이지  http://www.ams.com
Logo AMSCO - ams AG

AS1310 데이터시트(HTML) 23 Page - ams AG

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ams Datasheet
Page 23
[v1-11] 2015-Jan-28
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AS1310 − Application Information
Capacitor Selection
The convertor requires three capacitors. Ceramic X5R or X7R
types will minimize ESL and ESR while maintaining capacitance
at rated voltage over temperature. The VIN capacitor should be
22μF. The VOUT capacitor should be between 22μF and 47μF. A
larger output capacitor should be used if lower peak to peak
output voltage ripple is desired. A larger output capacitor will
also improve load regulation on VOUT. See Figure 23 for a list of
capacitors for input and output capacitor selection.
Figure 23:
Recommended Input and Output Capacitors
On the pin REF a 10nF capacitor with an Insulation resistance
>1G
Ω is recommended.
Figure 24:
Recommended Capacitors for REF
Layout Considerations
Relatively high peak currents of 480mA (max) circulate during
normal operation of the AS1310. Long printed circuit tracks can
generate additional ripple and noise that mask correct
operation and prove difficult to “de-bug” during production
testing. Referring to Figure 2, the input loop formed by C1, VIN
and GND pins should be minimized. Similarly, the output loop
formed by C2, VOUT and GND should also be minimized. Ideally
both loops should connect to GND in a “star” fashion. Finally, it
is important to return CREF to the GND pin directly.
Part Number
C
TC
Code
Rated
Voltage
Dimensions
(L/W/T)
Manufacturer
GRM21BR60J226ME99
22μF
X5R
6.3V
0805, T=1.25mm
Murata
www.murata.com
GRM31CR61C226KE15
22μF
X5R
16V
1206, T=1.6mm
GRM31CR60J475KA01
47μF
X5R
6.3V
1206, T=1.6mm
Part Number
C
TC
Code
Insulation
Resistance
Rated
Voltage
Dimensions
(L/W/T)
Manufacturer
GRM188R71C104KA01
100nF
X7R
>5G
Ω
16V
0603,
T=0.8mm
Murata
www.murata.com
GRM31CR61C226KE15
100nF
X7R
>5G
Ω
50V
0805,
T=1.25mm



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