Hardware Guide

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FIBOCOM MC610 Series Hardware Guide 27/71
Table 3-3 VBAT capacitance
Recommended
Capacitance
Application
Description
220uFx2,
10uF, 22uF
Stabilized capacitance
Low ESR capacitance is required to
reduce the power fluctuation of the module
during operation.
LDO or DCDC power supply requirements
are not less than 440 uF capacitance.
Battery power supply can be reduced to
100 uF-220 uF capacitance.
1uF, 100nF
Digital signal noise
Filter out the interference caused by clock
and digital signal.
33pF
700 MHz, 850 MHz/900 MHz band
Filter out RF interference of LF band
8.2pF
1,700 MHz/1,800 MHz/1,900MHz,
2,100 MHz/2,300 MHz, 2,500 MHz/
2,600 MHz band
Filter out RF interference of MF/HF band
The stability of power supply can ensure the normal operation of MC610 modules. During the design, it
is necessary to pay special attention to that the ripple wave of power supply is lower than 300 mV (line
ESR < 150 mΩ), and ensure that the power supply voltage is not less than 3.4 V at the maximum
operating current of the module (about 2 A); otherwise, the module may be powered down, shut down or
restarted. The power supply limitation is shown in the following figure:
Burst transmit Burst transmit
min:3.4V
VBAT
Ripple300mV
Drop
VBAT3.4V
Figure 3-3 Power supply limitation