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LAN7430/Y9X Datasheet(PDF) 26 Page - Microchip Technology

Part # LAN7430/Y9X
Description  Low Power PCIe to Gigabit Ethernet Controller with Integrated Ethernet MAC / PHY
PDF  77 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN7430/Y9X Datasheet(HTML) 26 Page - Microchip Technology

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LAN7430/LAN7431
DS00002631D-page 26
 2018-2019 Microchip Technology Inc.
4.0
POWER CONNECTIVITY
This section details the power connectivity of the LAN7430 and LAN7431 in various configurations. Power sequence
timing is detailed in Section 7.6.2, "Power Sequence Timing".
4.1
LAN7430 Power Connectivity
The following diagrams illustrate the power connectivity for LAN7430 with on-chip regulators enabled and disabled.
FIGURE 4-1:
LAN7430 POWER CONNECTIVITY ON-CHIP REGULATORS ENABLED
+1.8 V to
+3.3 V
VDD12CORE
Core Logic &
Ethernet PHY
digital
Ethernet PHY
Analog
1.0 µF
<1
 ESR
VSS
VDD12_SW_OUT
AVDD12
Ethernet PHY
Bandgap and Osc
IO Pads
Note: Bypass and bulk caps as needed for PCB.
Ferrites on AVDDL and AVDD12 may be combined.
VDDVARIO
(1 pin)
VDD_SW_IN
(1 pin)
+3.3 V
(1 pin)
(3 pins)
(2 pins)
(1 pin)
Ethernet PHY PLL
(exposed pad)
VDD25_REG_OUT
(1 pin)
VDD12_SW_FB
VDD_REG_IN
(1 pin)
3.3 / 1.2 OTP
VDD_OTP
(1 pin)
(1 pin)
AVDDH
AVDDL
(2 pins)
PCIe PHY
VP
(1 pin)
VPTX
(1 pin)
VPH
(1 pin)
3.3 uH
10 µF
<0.05
ESR
0.1uF
+3.3 V
optional 3.3V
PHY
operation
+1.8 V to
+3.3 V
IN
OUT
Internal 1.2 V
Switching Regulator
FEEDBACK
REF
IN
OUT
Internal 2.5 V LDO
Regulator
ENABLE



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