MFS2301BMBACEP datasheet(44/230 Pages) NXP

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NXP Semiconductors

FS23

Safety system basis chip (SBC) with power management, CAN FD and LIN transceivers

13.3 HVLDO2: High-voltage linear regulator 2

13.3.1 Functional description

General operation

The HVLDO2 is a high-voltage linear-voltage regulator. The HVLDO2 is commonly supplied from the battery.

The output voltage is configurable by OTP at 3.3 V or 5.0 V.

The HVLDO2 is low-power capable and can stay enabled in LPON mode. However, if disabled in LPON mode,

it cannot be enabled again by SPI/I2C in this mode.

This regulator is meant to supply load on the ECU or outside of the module: a dedicated feedback pin is

implemented so a diode can be added between V2_FB pin and V2 pin in order to protect the regulator against

short to the battery. If V2 is used as a local supply, V2_FB is shorted to V2 pin.

Open-feedback detection

A comparator is implemented to detect an open between V2_FB and V2 pins. When the difference between the

two voltages is higher than VDELTA_V2_to_V2_FB threshold, the regulator is turned OFF. It can be enabled again by

SPI/I2C command.

Current limitation and thermal shutdown

An overcurrent detection and a thermal shutdown are implemented on HVLDO2 to protect the internal pass

device. The overcurrent threshold is configurable by OTP (CONF_OC_V2_OTP). When an overcurrent is

detected, V2OC_I flag is generated and the regulator remains enabled. It is the MCU's responsibility to disable

the regulator by SPI/I2C using the V2DIS bit, and to decide when to enable the regulator using the V2EN bit.

When a thermal shutdown is detected, the regulator is disabled and V2TSD_I flag is generated.

13.3.2 Application schematic

aaa-051447

CIN_LDO2

COUT_LDO2

Optional

VLDO2

V2_IN

HVLDO2

Figure 25. HVLDO2 application schematic

FS23

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

Product data sheet

Rev. 7.0 — 16 October 2024

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MFS2301BMBACEP Datasheet(PDF) 44 Page - NXP Semiconductors