35FS4500, 35FS6500

Grade 0 safety power system basis chip with CAN flexible

data transceiver

Rev. 1.0 — 15 December 2017

Short data sheet: advance information

1 General description

The 35FS4500/35FS6500 SMARTMOS devices are a multi-output, power supply,

integrated circuit, including CAN Flexible Data (FD) transceiver, dedicated to harsh

automotive and transportation markets requiring high reliability (Grade 0) and high

functional safety (fit for ASIL D) performance.

Multiple switching and linear voltage regulators, including low-power mode (32 μA) are

available with various wake-up capabilities. An advanced power management scheme

is implemented to maintain high efficiency over a wide range of input voltages (down to

2.7 V) and output current ranges (up to 1.5 A).

The 35FS4500/35FS6500 includes configurable fail-safe/fail silent safety behavior and

features, with two fail-safe outputs, becoming a full part of a safety oriented system

partitioning, to reach a high integrity safety level (up to ASIL D).

The built-in CAN FD interface fulfills the ISO 11898-2 and -5 standards.

Q100 Grade 0 automotive qualification.

2 Features

• Battery voltage sensing and MUX output pin

• Highly flexible SMPS pre-regulator, allowing two topologies: non-inverting buck-boost

and standard buck

• 36 V maximum input operating voltage

• Family of devices to supply MCU core from 1.0 V to 5.0 V, with SMPS (0.8 A or 1.5 A)

or LDO (0.5 A)

tracker or independent), 5.0 V or 3.3 V

5.0 V or 3.3 V

• 3.3 V keep alive memory supply available in low-power mode

• Long duration timer, counting up to 6 months with 1.0 s resolution

• Multiple wake-up sources in low-power mode: CAN, IOs, LDT

• Five configurable I/Os

3 Applications