MPF0900AMBA2ES datasheet(126/205 Pages) NXP

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NXP Semiconductors

PF09

Nine-channel power management IC with advanced system safety monitoring

13.3.2 VAON monitoring

The VAON regulator is provided with two internal monitoring circuits to ensure proper monitoring and reaction

during the full operation of the system, maintaining minimum power consumption during the Low-power mode,

and providing proper coverage for the safety requirements to maintain circuit independence during the safety-

critical operating states.

The following section addresses voltage monitoring during the Power-up sequence, RUN and monitored

STANDBY states supported by the programmable voltage monitoring circuit with independent reference supply.

VAON monitoring during the OFF states and low-power STANDBY state is performed only by the low-power

undervoltage monitor as described in section 16.6.3 VAON Fault Management.

The VAONMON OV/UV debounce time follows the configuration set in the OV_DBNC[1:0] and UV_DBNC[1:0],

like all the other regulators.

aaa-056075

Monitoring voltage

reference

Reset

pulse

Sampling

network

Error amp and

controller

Low-power

voltage reference

Control logic

BG_LP

VAON MON voltage monitor

VAON LP UV monitor

Latched on VIN domain

VAON regulator

Power stage

VAON

VIN

UV Fault

BG2

OV Fault

Figure 32. VAON voltage monitoring architecture

The undervoltage monitoring threshold for the VAONMON block is set in the OTP registers via the

OTP_VAON_UVTH[1:0] bits.

OTP_VAON_UVTH[1:0]

VAON UV threshold

97 %

95 %

93 %

91 %

Table 165. VAON UV threshold configuration bits

The overvoltage monitoring threshold for the VAONMON block is set in the OTP registers via the

OTP_VAON_OVTH[1:0] bits.

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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