MFS5600AMBAFES datasheet(10/118 Pages) NXP

10 / 118 page

NXP Semiconductors

FS5600

Automotive buck regulator and controller with voltage monitors and watchdog timer

number

Pin name

Description

Absolute

maximum

voltage rating

Connection if not

used

EN1

SW1 enable input pin.

–0.3 V to 40 V

Connect to ground

FS0B

(NA for QM

version)

Fail-safe Output pin. Open drain.

Connect to ground for QM version.

–0.3 V to 40 V

Connect to ground

SW1FB

SW1 output voltage feedback. Use external or

internal resistor divider for SW1 outputs ≤ 5.5 V.

Use external resistor divider for SW1 outputs > 5.5

–0.3 V to 7 V

Connect to ground

PGOOD1

PGOOD1 output from monitoring of selected

voltage monitors. Open-drain.

–0.3 V to 5.5 V

Connect to ground

PGOOD2

PGOOD2 output from monitoring of selected

voltage monitors. Open-drain.

–0.3 V to 5.5 V

Connect to ground

VDIG

Output of internal regulator for powering logic.

Bypass with 2.2 µF capacitor. No external loading

permitted.

–0.3 V to 2.0 V

N/A

BIAS_IN

Input pin for external bias supply. Bypass with 1

µF capacitor. Connect to external bias supply <

5.5 V.

–0.3 V to 5.5 V

Connect to ground

VCC

VCC regulator/switch output. Bypass with 10

µF capacitor. No external loading permitted.

Nominally regulated at 4.7 V in the absence of

BIAS_IN.

–0.3 V to 5.5 V

N/A

MODE/SYNCIN

Selectable via OTP to be used for external clock

synchronization or to select between PFM and

PWM modes of operation.

–0.3 V to 5.5 V

Connect to ground

VIN

Input to internal circuitry. Connect to battery input. –0.3 V to 40 V

N/A

—

EPAD

Connect to ground with sufficient number of

thermal vias.

—

N/A

Table 3. Pin description...continued

FS5600

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

Product data sheet

Rev. 4 — 29 April 2024

10 / 118

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