Vbat Interface - Huawei MU509 Series Hardware Manual

HUAWEI MU509 Series HSDPA LGA Module
Hardware Guide
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Table 3-2 lists the definitions of the pins on the power supply interface.
Table 3-2 Definitions of the pins on the power supply interface
Pin No.
12, 13
48, 49, 50, 52, 53,
54, 56, 57, 58, 59,
106, 108, 110,
112, 114, 116
35
32
31
34
121–145

3.3.3 VBAT Interface

When the MU509 module works normally, power is supplied through the VBAT pins
and the voltage ranges from 3.3 V to 4.2 V (typical value: 3.8 V). The 145-pin LGA
provides VBAT pins and GND pins for external power input. To ensure that the MU509
module works normally, all the pins must be used efficiently.
When the MU509 module is used for different external applications, pay special
attention to the design for the power supply. When the MU509 module transmits
signals at the maximum power, the transient current may reach the transient peak
value of about 2.75 A due to the differences in actual network environments. In this
case, the VBAT voltage drops. Make sure that the voltage does not decrease below
3.3 V in any case. Otherwise, exceptions such as restart of the MU509 module may
occur.
Issue 09 (2014-03-06)
VCC_EXT1 pin for external power output
VCC_EXT2 pin for external power output
SIM_VCC pin for SIM card power output
Signal
Name
VBAT
GND
VCOIN
VCC_EXT1
VCC_EXT2
SIM_VCC
GND
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
I/O Description
Pins for power
P
voltage input
- GND
Pin for
standby power
P
input of the
RTC
Pin for
P external power
output
Pin for
P external power
output
Power supply
P
for SIM card
Thermal
-
Ground Pad
DC Characteristics (V)
Min. Typ. Max.
3.3 3.8 4.2
- - -
1.5 3.0 3.25
1.65 1.8 1.95
2.5 2.6 2.7
- 1.8/2.85 -
- - -
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