MPF0900AMBA2ES datasheet(128/205 Pages) NXP

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NXP Semiconductors

PF09

Nine-channel power management IC with advanced system safety monitoring

OTP_VMONx_UVTH[2:0]

UV threshold

101

94.0 %

110

93.5 %

111

93.0 %

Table 167. VMONx UV threshold configuration bits...continued

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

OTP_VMONx_OVTH[2:0] bits.

OTP_VMONx_OVTH[2:0]

OV threshold

000

103.5 %

001

104.0 %

010

104.5 %

011

105.0 %

100

105.5 %

101

106.0 %

110

106.5 %

111

107.0 %

Table 168. VMONx OV threshold configuration bits

For safety considerations, the OV/UV monitoring thresholds are selected in OTP during the part number

configuration phase, and they are not allowed to be changed during system operation. However, the system can

choose to open the monitoring range during the Monitored STANDBY state in order to accommodate larger DC/

AC output voltage accuracy on the voltage regulator being monitored by the VMONx block.

The VMONx_UVTH_STBY and VMONx_OVTH_STBY bits are provided to select whether to use the same

OV/UV monitoring threshold in RUN and STANDBY states or force the maximum OV/UV monitoring threshold

during the STANDBY state.

VMONx_UVTH_STBY

UV threshold in STANDBY

Same as RUN state

Open to maximum threshold

Table 169. VMONx UV threshold selection in STANDBY

VMONx_OVTH_STBY

OV thresholdin STANDBY

Same as RUN state

Open to maximum threshold

Table 170. VMONx OV threshold selection in STANDBY

By default, the VMONx_UVTH_STBY and VMONx_OVTH_STBY bits are set to 1 at power up, and the MCU

can modify their values before requesting access to the STANDBY states.

The UV and OV thresholds represent percentages of the nominal voltage programmed on each VMON

block. Setting the thresholds ensures that an undervoltage condition below the selected UV threshold or an

overvoltage condition above the selected OV threshold will always be detected by the VMON circuit.

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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