PCF2131 datasheet(12/34 Pages) NXP

12 / 34 page

NXP Semiconductors

UM12262

FRDM-IMX91 Board User Manual

Part

identifier

designator

Manufacturing

part number

Part

manufacturer

Power supply

Specifications Description

U730

MP1605C

Monolithic Power

Systems Inc.

VEXT_1V8

1.8 V at 500 mA Supplies power to onboard tri-

radio u-blox MAYA-W476-00B

module

BUCK2: LPD4/

x_VDDQ_0V6

• 0.6 V at 2000

Supplies power to VDDQ_DDR

power supply for CPU DRAM

PHY I/O (LPDDR4)

BUCK1/3: VDD_

SOC_0V8[1][2]

• VOL (V): 0.85

• Typ VOL (V):

Dynamic

voltage

scaling (DVS)

Note: Refer

to SoC data

sheet.

VDD_SOC, power supply for SoC

logic and Arm core

BUCK4:

• VDD_3V3

3.3 V at 3000

Supplies power to:

• NVCC_GPIO, power supply for

GPIO when it is in 3.3 V mode

• VDD_USB_3P3 pin for USB

PHY power

• eMMC 5.1 device

• MicroSD

• EEPROM

• Ethernet ports (P3 and P4)

• I2C IO expander PCAL6524

HEAZ (U725, I2C address:

0x22)

Power source for:

• ENET1_DVDD3 and ENET1_

AVDD3 supplies

BUCK5:

• VDD_1V8

1.8 V at 2000

Supplies to:

• LPD4/x_VDD1

• eMMC 5.1 device

• VDD_ANA_1P8, analog core

supply voltage

• NVCC_WAKEUP, digital I/O

supply

BUCK6:

• LPD4/x_

VDD2_1V1

1.1 V at 2000

Supplies to:

• VDD2_DDR, DDR PHY supply

voltage

LDO1: NVCC_

BBSM_ 1V8

1.8 V at 10 mA NVCC BBSM I/O supply

LDO4: VDD_

ANA_0 P8

0.8 V at 200 mA Analog core supply voltage

LDO5:

NVCC_SD

1.8 V / 3.3 V

MicroSD card

U701

PCA9451AHNY

NXP

Semiconductors

Load switch:

VSD_3V3

3.3 V

MicroSD card

Table 8. FRDM-IMX91 power supply devices...continued

UM12262

All information provided in this document is subject to legal disclaimers.

User manual

Rev. 3.0 — 22 April 2025

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