Datasheet
i.MX RT1015 Crossover Processors Data Sheet for Consumer Products, Rev. 0.1, 03/2019
22 NXP Semiconductors
Electrical characteristics
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 9 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 RT1015 Crossover Processors (IMXRT1015HDG).
For additional information, see the i.MX RT1015 Reference Manual (IMXRT1015RM).
4.2.2.2.2 LDO_2P5
The LDO_2P5 module implements a programmable linear-regulator function from VDD_HIGH_IN (see
Table 9 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 ļ.
For information on external capacitor requirements for this regulator, see the Hardware Development
Guide for i.MX RT1015 Crossover Processors (IMXRT1015HDG).
For additional information, see the i.MX RT1015 Reference Manual (IMXRT1015RM).
4.2.2.2.3 LDO_USB
The LDO_USB module implements a programmable linear-regulator function from the USB VUSB
voltages (4.4 Vā5.5 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 USB VBUS 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 RT1015 Crossover Processors (IMXRT1015HDG).