LAN7430 datasheet(24/77 Pages) MICROCHIP

24 / 77 page

LAN7430/LAN7431

DS00002631D-page 24

 2018-2019 Microchip Technology Inc.

Ethernet PHY

+1.2V Analog

Power Supply

AVDDL_1

1.2V power for analog core

Ethernet PHY

+1.2V Analog

Power Supply

AVDDL_2

1.2V power for analog core

(LAN7430 only)

This is an additional power pin for the 1.2V analog core.

PCIe PHY High

Voltage Supply

VPH

2.5V PCIe PHY power

PCIe PHY Trans-

mit Supply

VPTX

1.2V PCIe PHY TX power

PCIe PHY Analog

and Digital Supply

1.2V PCIe PHY power

Variable I/O

Power Supply

Input Group A

VDDVARIO

1.8V - 3.3V variable supply for IOs

Variable I/O

Power Supply

Input Group B

VDDVARIO_B

1.8V - 3.3V variable supply for RGMII and MII related IOs

(LAN7431 only)

This is the power pin for the RGMII and MII related IOs

(TXD3, TXD2, TXD1, TXD0, TX_ER/MII_EN, TX_CTL/

TX_EN, TXC/TX_CLK, RXC/RX_CLK, RX_CTL/RX_DV,

RXD0, RXD1, RXD2, RXD3, CLK125/RX_ER, REF-

CLK_25/GPIO11, COL/GPIO10, CRS).

OTP Power

VDD_OTP

3.3V to OTP charge pump

3.3V supply voltage for PCIe I/Os



(CLKREQ#, WAKE#, PERST#)

Switcher Input

Voltage

VDD_SW_IN

1.8V - 3.3V input voltage for switching regulator

Switcher Feed-

back

VDD12_SW_FB

Feedback pin for the integrated switching regulator

Note:

Tie this pin to VDD_SW_IN to disable the

switching regulator.

Switcher +1.2V

Unfiltered Output

Voltage

VDD12_SW_OUT

1.2V output voltage from switching regulator

LDO Input Voltage

VDD_REG_IN

3.3V input supply to the integrated LDO

Note:

If this supply is set to 2.5V than it shall be

externally connected to VDD25_REG_OUT.

See Section 4.0, "Power Connectivity" for

details.

LDO Output

VDD25_REG_OUT

2.5V output supply from the integrated LDO

This is used to supply power to the PCIE PHY and

optionally to the Gigabit Ethernet PHY AFE.

Digital Core +1.2V

Power Supply

Input

VDD12CORE

1.2V digital core power.

TABLE 3-3:

PIN DESCRIPTIONS (CONTINUED)

Name

Symbol

Buffer

Type

Description

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