FS5502 datasheet(91/113 Pages) NXP

91 / 113 page

NXP Semiconductors

FS5502

High voltage PMIC with multiple SMPS and LDO

TA = −40 °C to 125 °C, unless otherwise specified. VSUP = VSUP_UVH to 36 V, unless otherwise specified. All voltages referenced to

ground.

Symbol

Parameter

Min

Typ

Max

Unit

VMON1_UV_step Undervoltage threshold step (OTP_

VMON1UVTH[7:0] bits)

—

−0.5

—

VMON1_UV_acc Undervoltage threshold accuracy

−2

—

2.5

7.5

μs

TMON1_UV

Undervoltage filtering time (OTP_

VMON1_UV_DGLT[1:0] bits)

μs

VMON1_PD

Internal passive pull down

MΩ

Table 87. VMON1 (without ext resistor accuracy) electrical characteristics...continued

27.3 Fault management

27.3.1 Fault source and reaction

In normal operation when RSTB is released, the fault error counter is incremented when

a fault is detected by the FS5502 fail-safe state machine. Table 88 lists the faults and

their impact on PGOOD and RSTB pins according to the device configuration. The faults

that are configured to not assert RSTB will not increment the fault error counter. In that

case, only the flags are available for MCU diagnostic.

In Orange, the reaction in not configurable.

In Green, the reaction is configurable by OTP for PGOOD and I2C for RSTB during INIT_FS.

Apps related fail-safe faults

FLT_ERR_CNT

increment

RSTB assertion

PGOOD assertion

VCOREMON_OV

VCOREMON_OV_FS_IMPACT[1]

OTP config

VDDIO_OV

VDDIO_OV_FS_IMPACT[1]

OTP config

VMON1_OV

VMON1_OV_FS_IMPACT[1]

OTP config

VCOREMON_UV

VCOREMON_UV_FS_IMPACT[1]

OTP config

VDDIO_UV

VDDIO_UV_FS_IMPACT[1]

OTP config

VMON1_UV

VMON1_UV_FS_IMPACT[1]

OTP config

External RESET (out of extended

RSTB)

Yes (low externally)

RSTB pulse request by MCU

Yes

RSTB short to high

No (high externally)

REG_CORRUPT = 1

OTP_CORRUPT = 1

Table 88. Application related fail-safe fault list and reaction

If OTP_PGOOD_RSTB = 0 (default configuration), RSTB and PGOOD pins work

independently according to Table 88. If OTP_PGOOD_RSTB = 1, RSTB and PGOOD

pins work concurrently and all the faults asserting RSTB will also assert PGOOD.

FS5502

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

Product data sheet

Rev. 4 — 27 October 2021

91 / 113

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