MFS5600AMBAFES datasheet(39/118 Pages) NXP

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NXP Semiconductors

FS5600

Automotive buck regulator and controller with voltage monitors and watchdog timer

OTP_PGOOD1_DELAY[2:0]

OTP_PGOOD2_DELAY[2:0]

OTP_GPO1_DELAY[2:0]

OTP_GPO2_DELAY[2:0]

OTP_GPO3_DELAY[2:0]

Delay duration (µs)

000

GPO1/2/3 held low through power-up.

No additional delay for PGOOD1/2 release.

001

250

010

500

011

1000

100

2000

101

4000

110

8000

111

16000

Table 31. PGOOD1/2, GPIO1/2/3 delay selection

15.5 MODE pin

The MODE/SYNCIN pin can be configured as a MODE input via OTP by setting OTP_MODE_SYNCINB = 1.

The switching mode of SW1 and SW2 regulators can be changed by toggling with MODE pin.

When MODE = 0, SW1 and SW2 operate in continuous PWM mode.

When MODE = 1, SW1 and SW2 operate in PFM mode. In this condition, several internal circuits are turned off

to achieve low quiescent current operation. PGOOD1 and PGOOD2 outputs indicate regulation status of SW1

and SW2 respectively in this condition.

Note: OTP_ULPM_EN = 1 for all QM devices to achieve the low quiescent current. OTP_ULPM_EN may be

set to 0 or 1 for ASIL B and Enhanced ASIL B variations to achieve different behavior. See Section 17.13.9 for

details.

15.6 I2C communication

Communication with the FS5600 is done through I2C, and it supports high-speed operation mode with up to 3.4

MHz operation. SDA and SCL are pulled up to VDDIO typically with 2.2 kΩ resistors for 400 kHz operation, and

500 Ω for 3.4 MHz operation.

Refer to UM10204, I 2C-bus specification and user manual for detailed information on the digital I2C

communication protocol implementation. The FS5600 is designed to operate as a slave device during I2C

communication. The default I2C device address is set by the OTP_I2C_ADD[2:0].

OTP_I2C_ADD[2:0]

Device address

000

0x18 (Default)

001

0x19

010

0x1A

011

0x1B

100

0x1C

101

0x1D

Table 32. I2C address selection

FS5600

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

Product data sheet

Rev. 4 — 29 April 2024

39 / 118

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