MPF0900AMBA2ES datasheet(55/205 Pages) NXP

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NXP Semiconductors

PF09

Nine-channel power management IC with advanced system safety monitoring

• PGOOD is asserted if OV/UV condition is not bypassed and VAON_PG_EN = 1.

• Fault counter is increased if OV/UV condition is not bypassed.

• Global fault timer is started if OV/UV condition is not bypassed.

• The VAON output is disabled if the VAON_OV_STATE / VAON_UV_STATE = 0.

• The VAON output will be re-enabled automatically if the VAON_FLT_REN = 1

• The FS0B pin will be asserted as defined by the pin configuration.

• During the hard fault, the VAON will be disabled as indicated by the power-down sequence (VAON_SEQ[7:0]

bits).

State

Fault mode

(OTP_VAON_FMODE)

Fault reaction

RUN State and

monitored STANDBY

Don’t care

OV/UV interrupt is generated

PGOOD asserted.

Fault counter increased.

Global fault timer started.

Hard fault includes VAON (in sequencer).

Low-power STANDBY

Don’t care

No monitoring available.

Table 54. VAON System regulator fault management

12.6.4 Fault monitoring during time-based power up

The OTP_PWRUP_CHK bit is provided to select whether the output of the switching regulators is verified during

the Power-up sequence. It is used as a gating condition to release or not release the RSTB pin.

OTP_PWRUP_CHK

Power good verification

Disabled

Enabled

Table 55. OTP_PWRUP_CHK bit

When the OTP_PWRUP_CHK = 0, the output voltage of the regulators is not checked during the Power-up

sequence and a power-good indication is not required to release the RSTB pin. All regulators enabled after the

RSTB is released will start checking for faults after their corresponding blanking period.

When the OTP_PWRUP_CHK = 1, the output voltage of the regulators is verified during the Power-up

sequence and a power-good condition is required to release the RSTB.

When RSTB is ready to be de-asserted, the device will check for any OV/UV condition in the regulators that

have been already turned on. If all regulators power up before RSTB is in regulation, the RSTB is released and

the Power-up sequence will continue.

PF09

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

Product data sheet

Rev. 1.3 — 16 December 2025

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