AIC1553
The selection of output capacitor dominates the
ESR of the capacitor. The capacitance is
adequate for filtering and the low ESR value
shows a low ripple voltage.
Layout Considerations
Due to the high switching frequency and large
transient current, the layout is recommended to
have a ground plane and short connections to
each component. Minimize the length and the
sufficient traces for power- flow loop. Fig. 13 is
recommended placement for components.
The output ripple voltage can be calculated as:
1
∆VO ≅ ∆IL
+ ESR
8COUT
Ceramic capacitor with low ESR value provides
the low output ripple. For required, the ceramic
capacitor parallel a tantalum capacitor is satisfied.
Fig. 13 The Recommended Placement and Routing of AIC1553
ꢀPHYSICAL DIMENSIONS
ꢁ
SOT-23-5 (unit: mm)
SYMBOL
MIN
1.00
—
0.70
0.35
0.10
2.70
1.40
MAX
1.30
0.10
0.90
0.50
0.25
3.10
1.80
C
D
A
A1
A2
b
C
D
L
H
E
e
θ1
E
A
A2
e
1.90 (TYP)
A1
H
L
2.60
0.37
1°
3.00
—
b
θ1
9°
9
AIC [ ANALOG INTERGRATIONS CORPORATION ]
