MPF0900AMMA2ES datasheet(170/205 Pages) NXP

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NXP Semiconductors

PF09

Nine-channel power management IC with advanced system safety monitoring

14.12.2.1 Safety handshake configuration registers

A single handshake failure will assert the FS0B pin and set the SHS_I interrupt. The OTP_SHS_RSTB[2:0] bits

are provided to set the number of bad safety-handshake transactions needed to cause the RSTB to be asserted

and generate a critical fault condition.

OTP_SHS_RSTB[2:0]

SHS faults to assert RSTB

Maximum latency

000

1 HS fault

100 μs

001

2 HS faults

300 μs

010

4 HS faults

700 μs

011

8 HS faults

1,500 μs

100

16 HS faults

3100 μs

101

32 HS faults

6300 μs

110

64 HS faults

12,700 μs

111

No RSTB asserted

Infinite

Table 220. SHS faults to assert RSTB

OTP_SHS_CUTOFF[2:0] bits are provided to set the number of bad safety-handshake transactions needed

before the DMS can take full control of the voltage regulators and disable the power stage via the power-cutoff

signals.

OTP_SHS_CUTOFF[2:0]

HS faults to power cutoff

Maximum latency

000

1 HS fault

100 μs

001

2 HS faults

300 μs

010

4 HS faults

700 μs

011

8 HS faults

1500 μs

100

16 HS faults

3100 μs

101

32 HS faults

6300 μs

110

64 HS faults

12700 μs

111

No Power Cutoff

Infinite

Table 221. SHS faults to power cutoff

14.12.2.2 Bandgap monitor fault protection

When the DMS detects a drift between the internal bandgaps, the DMS will assert the FS0B output and the

BGMON_I interrupt will be set. If the BGMON fault condition is temporary, no critical fault is generated, but

the BGMON_I flag and the FS0B output remain asserted until the MCU is able to clear the BGMON flag and

release the FS0B.

If the BGMON fault conditions are persistent, the OTP_BGM_RSTB[1:0] bits set the debounce time before the

DMS sends a critical fault notification to assert the RSTB pin.

OTP_BGM_RSTB[1:0]

BGMON RSTB debounce

No assertion

10 μs

Table 222. BGMON RSTB debounce time to assert RSTB via the DMS

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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