Airplane Mode; Power Supply - Quectel EC200T Hardware Design

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The host's USB bus, which is connected with the module's USB interface, enters suspend state.

3.4.2. Airplane Mode

When the module enters airplane mode, the RF function will be disabled, and all AT commands related to

it will be inaccessible. For more details, please refer to Chapter 3.10.3.

The following table shows pin definition of VCC_3V3 pins and ground pins.

Table 6: Definition of VCC_3V3 and GND Pins

Pin Name

Pin No.

VCC_3V3

2, 39, 41, 52

4, 9, 15, 18, 21,

GND

26, 27, 29, 34, 35,

37, 40, 43, 50

The typical supply voltage of EC200T Mini PCIe is 3.3V. In the 2G network, the input peak current may

reach 2.7A during the transmitting time. Therefore, the power supply must be able to provide a rated

output current of 2.7A at least, and a bypass capacitor of no less than 470µF with low ESR should be

used to prevent the voltage from dropping. If the switching power supply is used to supply power to the

module, the power device and power supply routing traces of the switching power supply should be kept

away from the antennas as much as possible to prevent EMI interference.

The following figure shows a reference design of power supply where R2 and R3 are 1% tolerance

resistors and C3 is a low-ESR capacitor.

EC200T_Mini_PCIe_Hardware_Design

I/O

Power Domain

3.0V~3.6V

LTE Standard Module Series

EC200T Mini PCIe Hardware Design

Description

Typically 3.3V DC supply

Mini card ground

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