MFS2301BMBACEP datasheet(46/230 Pages) NXP

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NXP Semiconductors

FS23

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

13.4 HVLDO3: High-voltage linear regulator 3

13.4.1 Functional description

General operation

The HVLDO3 is a high-voltage linear-voltage regulator. The HVLDO3 is commonly supplied from the battery.

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

The HVLDO3 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 the integrated CAN transceiver. The connection is made internally. The

HVLDO3 can also supply an additional external transceiver on the module.

Current limitation and thermal shutdown

An overcurrent detection and a thermal shutdown are implemented on the HVLDO3 to protect the internal

pass device. The overcurrent threshold is configurable by OTP (CONF_OC_V3_OTP). When an overcurrent is

detected, V3OC_I flag is generated and the regulator remains enabled. It is the MCU's responsibility to disable

the regulator by SPI/I2C using V3DIS bit, and to decide when to enable it using V3EN bit. When a thermal

shutdown is detected, the regulator is disabled and V3TSD_I flag is generated.

13.4.2 Application schematic

aaa-051448

CIN_LDO3

COUT_LDO3

VLDO3

V3_IN

V3 - HVLDO3

Figure 26. HVLDO3 application schematic.

13.4.3 Electrical characteristics

TA = −40 °C to 125 °C, unless otherwise specified. V3_IN = VSUP = 5.5 V to 40 V if V3 = 5 V, or V3_IN = VSUP = 4 V to 40 V if V3 = 3.3V,

unless otherwise specified. ILDO3 = 0 to 100 mA unless otherwise specified. All voltages referenced to ground.

Symbol

Parameter

Min

Typ

Max

Unit

Static electrical characteristics

VLDO3_IN

Input voltage range

VLDO3

Output voltage (OTP configurable)

VV3_OTP = 0

VV3_OTP = 1

3.234

4.9

3.3

5.0

3.366

5.1

VLDO3_ACC

Output voltage accuracy

-2

VLDO3_DROP

Maximum output voltage Drop-in/Drop-out mode

(VLDO3 = 5 V, VLDO3_IN = 4.5 V, ILDO3 = 100 mA)

500

ILDO3_NORMAL

DC current capability in Normal mode

ILDO3_ILIM mA

Table 19. HVLDO3 electrical characteristics

FS23

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Product data sheet

Rev. 7.0 — 16 October 2024

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