MFS5600AMBAFES datasheet(37/118 Pages) NXP

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NXP Semiconductors

FS5600

Automotive buck regulator and controller with voltage monitors and watchdog timer

15 I/O pins in FS5600

The FS5600 has several I/O pins for system control and monitoring. These are described in Section 15.1

through Section 15.6. Parametric requirements for all the IO's are summarized in Section 15.1.

15.1 I/O pins electrical specifications

All parameters are specified at TA = –40 °C to 125 °C, VIN = 12 V, typical external component values, unless

otherwise noted. Typical values are specified at 25 °C, unless otherwise noted.

Parameter

Symbol

Min

Typ

Max

Unit

EN1, EN2 Rising Threshold

ENx_r

1.40

—

EN1, EN2 Falling Threshold

ENx_f

—

0.95

EN1, EN2 Debounce

ENx_db

—

µs

SDA/SCL Rising Threshold (2.2k kΩ pullup to VDDIO)

I2C_r

—

0.7*VDDIO

SDA/SCL Falling Threshold (2.2k kΩ pullup to VDDIO)

I2C_f

0.3*VDDIO —

—

PGOOD1/2_VOH (10 kΩ pullup to VDDIO)

PG_VOH

—

VDDIO – 0.5 V

PGOOD1/2_VOL(10 kΩ pullup to VDDIO)

PG_VOL

0.4

—

MODE Rising Threshold

MODE_r

—

1.25

MODE Falling Threshold

MODE_f

0.35

—

MODE Debounce: Rising Edge (OTP_MODE_DB = 0)

MODE_db —

—

µs

MODE Debounce: Rising Edge (OTP_MODE_DB = 1)

MODE_db —

—

MODE Debounce Falling Edge (OTP_MODE_DB = 0/1)

MODE_db —

—

µs

GPIOx_VOH (10 kΩ pullup to VDDIO)

GPIO_VOH —

—

VDDIO - 0.5 V

GPIOx_VOL (10kΩ pullup to VDDIO)

GPIO_VOL 0.4

—

SYNCOUT_VOH (push-pull)

SYNCOUT_

VOH

—

0.7*VDDIO

SYNCOUT_VOL (push-pull)

SYNCOUT_

VOL

0.3*VDDIO —

—

Table 30. I/O pin electrical specifications

15.2 EN1 and EN2

EN1 and EN2 pins are used to enable SW1 and SW2 respectively. In addition to the EN1 and EN2 pins, the

bits SW1_EN and SW2_EN ultimately determine if SW1 or SW2 are enabled. This allows enable and disable of

SW1 and SW2 to be performed through their respective ENx pin, or via the respective I2C bit SWx_EN.

SW1 regulator is disabled if (EN1 pin = LOW).

SW1 regulator is disabled if (EN1 pin = HIGH AND SW1_EN = 0).

SW1 regulator is enabled if (EN1 pin = HIGH AND SW1_EN = 1).

SW2 regulator is disabled if (EN2 pin = LOW).

SW2 regulator is disabled if (EN2 pin = HIGH AND SW2_EN = 0).

SW2 regulator is enabled if (EN2 pin = HIGH AND SW2_EN = 1).

SW1/2_EN are initialized to 1.

FS5600

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

Product data sheet

Rev. 4 — 29 April 2024

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