Rainbow-electronics MAX8982X Bedienungsanleitung PDF herunterladen (Seite 32)

Power-Management ICs for

ICERA E400/E450 Platform

MAX8982A/MAX8982X

Table 2. External Component List for Figure 1

Note: Input/output capacitance should be as close as possible to the IC. All capacitors are ceramic X5R or X7R, unless otherwise noted.

LOCATION EXTERNAL COMPONENTS NOTES

IN1A, IN1B

3 x 330FF tantalum capacitors

Buck stability and GSM PA supply

IN3 2.2FF Input for LDO4 and LDO9

IN4 1.0FF Input for LDO8

OUT1 4.7FF

LDO compensation and load transient

response

OUT2 1.0FF LDO compensation

OUT3 1.0FF LDO compensation

OUT4 2.2FF LDO compensation

OUT5 1.0FF LDO compensation

OUT6 1.0FF LDO compensation

VSIM (OUT7) 1.0FF LDO compensation

OUT8 1.0FF LDO compensation

OUT9 2.2FF LDO compensation

DDA

, V

DDB

Total capacitance R total output capacitance

for LDO1, LDO2, LDO3, LDO5, LDO6, and

VSIM. Use a 10FF capacitor on V

DDA

DDB

as recommended.

All LDOs stability

BUCK1 for BB Core 2.2FF For low noise, 1.2A continuous load

BUCK2 for BB System IO 2.2FF For low noise

BUCK3 as LDO Input 2.2FF For low noise

BUCK4 for GSM PA/UMTS PA 2 x 22FF Supply for both GSM PA and UMTS PA

LX1 1FH to 4.7FH 2.2FH recommended (Table 60)

LX2 1FH to 4.7FH 1.0FH recommended (Table 60)

LX3 1FH to 4.7FH 2.2FH recommended (Table 60)

LX4 1FH to 4.7FH 2.2FH recommended (Table 60)

REFBP 0.1FF Noise filter

EN A pulldown resistor, if necessary.

Any Bump Required to Pass 8kV

Module Level ESD

0.1FF Absorb ESD energy

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 72 73

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