MFS5600AMBA0ES datasheet(36/111 Pages) NXP

36 / 111 page

NXP Semiconductors

FS5600

Automotive buck regulator and controller with voltage monitors and watchdog timer

The FS5600 offers comprehensive monitoring and self-test capabilities to achieve

high diagnostic coverage at the system level. The functional safety features of FS5600

include:

• Four high precision voltage monitors (in addition to monitoring of SW1 and SW2

internally)

• Challenger windowed watchdog timer

• FCCU monitoring

• 2x ERRMON monitoring for external signal monitoring

• Fail-Safe Output (FS0B) with programmable fault reaction

• PGOOD1 and PGOOD2 outputs with programmable fault reaction

• Stuck-at-fault detection on PGOOD1, PGOOD2, and FS0B outputs

• State machine with programmable fault reactions

• Redundant band gap with band gap comparator for self-test

• Internal oscillator self-test

• Built-in self-test (ABIST and LBIST) of analog and digital monitoring functions for latent

failure diagnostics

• On-Demand ABIST

• CRC on OTP bits in the device

• I2C with CRC

• NOT register functionality to prevent accidental writes to critical registers

• Monitoring of internal voltages such as VCC and VDIG for over and under voltage

faults

17.1 GPIO1/2/3 feature selection

The GPIO1/2/3 are multipurpose pins. Specific feature selection on these pins should

be selected via OTP using the OTP_GPIO1_CFG[1:0], OTP_GPIO2_CFG[1:0] and

OTP_GPIO3_CFG[1:0] bits as shown below in Table 34, Table 35, and Table 36.

OTP_GPIO1_CFG[1:0]

GPIO1 configuration

Output is high Z

GPO (output)

ERRMON1 (input)

Reserved (do not use)

Table 34. GPIO1 function selection

OTP_GPIO2_CFG[1:0]

GPIO2 configuration

GPO (output)

FCCU1 (input)

SYNCOUT (output)

VMON3

Table 35. GPIO2 function selection

FS5600

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

Product data sheet

Rev. 3 — 2 August 2022

36 / 111

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