MFS5600AMMA7ES datasheet(32/111 Pages) NXP

32 / 111 page

NXP Semiconductors

FS5600

Automotive buck regulator and controller with voltage monitors and watchdog timer

A frequency watchdog monitors the external clock at the SYNCIN pin. If the external

clock is not present or invalid, the device automatically switches to the internal clock.

The device switches back to the external clock if the frequency watchdog detects a valid

input.

When the external clock is selected, the switching regulators should be set in PWM mode

at the application level to ensure clock synchronization.

14.6 SYNCOUT function settings

The GPIO2 pin may be configured as SYNCOUT via OTP by setting

OTP_GPIO2_CFG[1:0] = 0b10. When configured as SYNCOUT, GPIO2 outputs the clock

that the SW1 regulator uses (in terms of phasing and frequency) in a push-pull mode

railing to VDDIO and ground.

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

FS5600

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

Product data sheet

Rev. 3 — 2 August 2022

32 / 111

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