Cavli Wireless C100QM - Power Supply Design

Cavli Wireless C100QM/C10QM Hardware Manual
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✧ UIM_PWR is the working power supply for SIM card
✧ VDD_EXT is 1.8V output power (50mA)
✧ VDD_SDIO is the SD card pull-up power supply (50mA)
3.3.1 Power supply design
The power interface of the C100QM/C10QM module is as follows:
Table 3-4 Power pin definitions
Pin number
name
I/
O
description
Min
Typical
Max
57,58,59,60
VBAT
PI
Module power
supply
3.3V
3.7V
4.2V
14
UIM_PWR
PO
SIM power
supply
0
1.8V/2.85
V
1.98/3.3
V
7
VDD_EXT
PO
Output power
1.8V
34
VDD_SDIO
PO
Output power
1.8V/2.85
V
8,9,10,19,22,36
,46,48,50,51,52
,53,54,56,72,
85~112
GND
Ground
-
0
-
The C100QM/C10QM module operates in a single-supply mode with four power
supply pins. The VBAT power supply range is 3.3-4.2V, and it is recommended to use
3.7V/2A power supply. When transmitting data or talking under HSPA/UTMS/GSM
network, the instantaneous high-power transmission will produce a peak current of more