AX99760,AX88178,AX88772A,AX887...

AX88172A_EXPRESSCARD-TO-REVMII_-20105

4

3

2

1

Note: This schematic is for your reference purpose only

This block of circuit should be implemented on the external device that was connected to AX88172A through Rev-MII or Rev-RMII interface AX88172A can use the GPIO_0 pin to control the switching regulator power of external device to reduce the power consumption for USB-IF Bus-power mode test External Device Power VDD1_8
U5 4 VIN GND EN SW 3 L3 2.2uH R11 200k C41 22uF/10V R13 100k C43 0.1uF C1 0.1uF

VCC3_3

Reference Transformer Part No. list YL2J201A YuTai Electronics Co.,LTD TEL:86-574-63620701,63621610 http;//www.yutai-elec.com EMAIL：nico_yu@yeah.net

ON
C40 4.7uF/16V C42 0.1uF

OFF

GPIO_0

1

Active high

2

FB 5 MP1556DJ

Switching regulator

D

VCC3_3 R5 330 SPEED_LED 12 11 U6

D

The switching regulator reference