AAT2610_12 Datasheet, PDF (24/31 Pages) Skyworks Solutions Inc. – Seven-Channel PMU for Digital Still Cameras

DATA SHEET
AAT2610
Seven-Channel PMU for Digital Still Cameras
Manufacturer
Part Number
CDRH4D22/HP
CDRH8D28
Sumida
Cooper
Murata
CDRH2D09
CDRH2D09C
CDRH2D14
CDRH2D11/HP
CDRH2D18/HP
CDRH2D18/HP
SD3110
SD3110
SD3112
LQH32PN2R2NN0
LQH32PN3R3NN0
LQH32PN4R7NN0
Inductance
(µH)
2.2
2.5
2.5
2.2
1.8
3.3
4.7
4.7
2.2
4.7
2.2
3.3
4.7
2.2
3.3
4.7
Max DC
Current
(A)
3.2
4.5
0.53
0.60
0.65
0.50
1.0
0.75
1.6
1.2
1.0
0.81
0.80
1.6
1.2
1.0
DCR
(mΩ)
35.4
12
120
115
105
139
135
190
48
110
149
195
246
76
120
180
Size (mm)
LxWxH
4.5x4.5x2.4
8.3x8.3x3
3.2x3.2x1.0
3.2x3.2x1.0
3.2x3.2x1.0
3.2x3.2x1.0
3.2x3.2x1.55
3.2x3.2x1.2
3.2x3.2x2.0
3.2x3.2x2.0
3.1x3.1x1.0
3.1x3.1x1.0
3.1x3.1x1.2
3.2x2.5x1.55
3.2x2.5x1.55
3.2x2.5x1.55
Type
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
unshielded
unshielded
unshielded
Suit for
Channel
SU
SU
Main SD, SD1, SD2
Main SD, SD1, SD2
SD2
Main SU
AUX1, AUX2, AUX3
Main SD, SD1, SD2
AUX1, AUX2, AUX3
Main SD, SD1, SD2
Main SU, SD1, SD2
AUX1, AUX2, AUX3
Main SD, SD1, SD2
Main SU, SD1, SD2
AUX1, AUX2, AUX3
Table 3: Suggested Inductor Selection Information.
To step-up converter,
Among it,
I_{L_SAT} >
I_{OUT_MAX}
1-D
+
V_IN · D
2·f·L
D
=
1
-
V_IN
V_OUT
To step-down converter,
Among it,
I_{L_SAT}
>
I_{OUT_MAX}
+
(V_IN -
2
V_OUT)
·f·L
·
D
D
=
V_OUT
V_IN
Input and Output Capacitor Selection
Low ESR (equivalent series resistance) capacitors should
be used to minimize output voltage ripple. Multilayer
ceramic capacitors are an excellent choice as they have
extremely low ESR and are available in small footprints.
The following equations show the minimum capacitance
under the required output voltage ripple for step-up and
step-down converters. In actual application, capacitance
usually decreases a lot as its DC bias increases. So when
selected output capacitors, not only calculating the out-
put capacitor minimum values are necessary according
to the equations, but the actual capacitance must be
carefully considered to get expected output voltage rip-
ple. X5R and X7R dielectric materials of ceramic capaci-
tors are preferred for their ability to maintain capaci-
tance over wide voltage and temperature ranges.
To step-up converter,
C_OUT
≥
D · I_OUT
∆V_OUT · f
To step-down converter,
C_OUT ≥
V_OUT
8 · f² · L · ∆V_OUT
· (1 - D)
For example, to step-up converter, when V_IN = 3.6V, I_OUT
= 900mA, and f = 1.5MHz, output ripple requires below
30mV. According to the equation above, the calculated
C_OUT should be higher than 5.6µF. If use Sumida 22µF/6.3V
0805 ceramic capacitor, its capacitance at 5V DC bias is
8.0µF which can meet the ripple requirements.
Input capacitors for input decoupling should be located
as close as possible to the device to get better input
power filtering effect. Select 1µF to 4.7µF X5R or X7R
ceramic capacitors for the inputs. Table 4 shows sug-
gested capacitor part numbers.
24
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202208A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 25, 2012