MAX8805Y MAXIM [Maxim Integrated Products], MAX8805Y Datasheet - Page 15

• Manufacturer Part Number: MAX8805Y
• Description: 600mA PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power
• Manufacturer: MAXIM [Maxim Integrated Products]

Table 2. Suggested Inductors
The input capacitor (C
the current peaks drawn from the battery or input
power source and reduces switching noise in the
MAX8805Y/MAX8805Z. The impedance of C
switching frequency should be kept very low. Ceramic
capacitors with X5R or X7R dielectric are highly recom-
mended due to their small size, low ESR, and small
temperature coefficients. A 2.2µF capacitor is recom-
mended for most applications. For optimum noise
immunity and low input ripple, the input capacitor value
can be increased.
For the LDOs, use an input capacitance equal to the
value of the sum of the output capacitance of LDO1 and
Coilcraft
FDK
Hitachi
Murata
Sumida
Taiyo Yuden
TOKO
MANUFACTURER
______________________________________________________________________________________
2mm x 2mm WLP for WCDMA PA Power
Input Capacitor Selection
IN1
KSLI-252010
LQH32C_53
CDRH2D09
CDRH2D11
600mA PWM Step-Down Converters in
MIPF2520
MIPS2520
MIPF2016
LPO3310
CB2518T
D3010FB
SERIES
D2812C
) of the PA converter reduces
D312C
D310F
INDUCTANCE
(µH)
1.0
1.5
2.2
1.0
1.5
2.2
1.3
2.0
1.0
2.2
1.5
2.2
1.0
2.2
1.2
1.5
2.2
1.5
2.2
3.3
2.2
4.7
1.0
1.2
2.2
1.5
2.2
1.5
2.2
IN1
at the
0.115
0.080
ESR
0.07
0.10
0.13
0.05
0.07
0.08
0.09
0.11
0.11
0.06
0.10
0.08
0.09
0.12
0.05
0.08
0.10
0.09
0.13
0.20
0.09
0.15
0.13
0.17
0.10
0.12
LDO2. Larger input capacitor values and lower ESR pro-
vide better noise rejection and line transient response.
Note that some ceramic dielectrics exhibit large capaci-
tance and ESR variation with temperature. With
dielectrics such as Z5U and Y5V, it may be necessary to
use two times the sum of the output capacitor values of
LDO1 and LDO2 (or larger) to ensure stability at temper-
atures below -10°C. With X7R or X5R dielectrics, a
capacitance equal to the sum is sufficient at all operating
temperatures.
(Ω)
CURRENT RATING
(mA)
1600
1400
1100
1500
1500
1300
1500
1200
1100
1000
1170
1230
1080
1290
1140
790
590
520
440
680
580
450
510
340
860
640
—
2.0 x 1.6 x 1.0 = 3.2mm
3.3 x 3.3 x 1.0 = 11mm
3.2 x 2.5 x 1.7 = 14mm
3.2 x 3.2 x 1.2 = 12mm
3.0 x 3.0 x 1.2 = 11mm
3.6 x 3.6 x 1.0 = 13mm
3.6 x 3.6 x 1.2 = 16mm
2.5 x 2.0 x 1.0 = 5mm
2.5 x 2.0 x 1.0 = 5mm
2.5 x 2.0 x 1.0 = 5mm
3.0 x 3.0 x 1.0 = 9mm
2.5 x 1.8 x 2.0 = 9mm
3.0 x 3.0 x 1.0 = 9mm
DIMENSIONS
(mm)
15
3
3
3
3
3
3
3
3
3
3
3
3
3