PRT702LCAF5A datasheet(29/113 Pages) NXP

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Electrical Characteristics

i.MX RT1064 Crossover Processors for Industrial Products, Rev. 2, 08/2020

NXP Semiconductors

4.2.2.2

Regulators for analog modules

4.2.2.2.1

LDO_1P1

The LDO_1P1 regulator implements a programmable linear-regulator function from VDD_HIGH_IN (see

Table 10 for minimum and maximum input requirements). Typical Programming Operating Range is 1.0

V to 1.2 V with the nominal default setting as 1.1 V. The LDO_1P1 supplies the USB Phy, and PLLs. A

programmable brown-out detector is included in the regulator that can be used by the system to determine

when the load capability of the regulator is being exceeded to take the necessary steps. Current-limiting

can be enabled to allow for in-rush current requirements during start-up, if needed. Active-pull-down can

also be enabled for systems requiring this feature.

For information on external capacitor requirements for this regulator, see the Hardware Development

Guide for i.MX RT1064 Crossover Processors (IMXRT1064HDG).

For additional information, see the i.MX RT1064 Reference Manual (IMXRT1064RM).

4.2.2.2.2

LDO_2P5

The LDO_2P5 module implements a programmable linear-regulator function from VDD_HIGH_IN (see

Table 10 for minimum and maximum input requirements). Typical Programming Operating Range is

2.25 V to 2.75 V with the nominal default setting as 2.5 V. LDO_2P5 supplies the USB PHY, E-fuse

module, and PLLs. A programmable brown-out detector is included in the regulator that can be used by

the system to determine when the load capability of the regulator is being exceeded, to take the necessary

steps. Current-limiting can be enabled to allow for in-rush current requirements during start-up, if needed.

Active-pull-down can also be enabled for systems requiring this feature. An alternate self-biased

low-precision weak-regulator is included that can be enabled for applications needing to keep the output

voltage alive during low-power modes where the main regulator driver and its associated global bandgap

reference module are disabled. The output of the weak-regulator is not programmable and is a function of

the input supply as well as the load current. Typically, with a 3 V input supply the weak-regulator output

is 2.525 V and its output impedance is approximately 40 .

For information on external capacitor requirements for this regulator, see the Hardware Development

Guide for i.MX RT1064 Crossover Processors (IMXRT1064HDG).

For additional information, see the i.MX RT1064 Reference Manual (IMXRT1064RM).

4.2.2.2.3

LDO_USB

The LDO_USB module implements a programmable linear-regulator function from the USB VUSB

voltages (4.4 V–5.5 V) to produce a nominal 3.0 V output voltage. A programmable brown-out detector

is included in the regulator that can be used by the system to determine when the load capability of the

regulator is being exceeded, to take the necessary steps. This regulator has a built in power-mux that allows

the user to select to run the regulator from either USB VBUS supply, when both are present. If only one

of the USB VBUS voltages is present, then, the regulator automatically selects this supply. Current limit

is also included to help the system meet in-rush current targets.

For information on external capacitor requirements for this regulator, see the Hardware Development

Guide for i.MX RT1064 Crossover Processors (IMXRT1064HDG).

PRT702LCAF5A Datasheet(PDF) 29 Page - NXP Semiconductors

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