Data Sheet

14

Rev. 1.1

2018-10-15

TLE8457C / TLE8457D

LIN Transceiver with integrated voltage regulator

Functional description

4.3

Voltage regulator

The TLE8457C / TLE8457D has an integrated voltage regulator dedicated for supplying microcontrollers

and/or on-board sensors under harsh automotive environment conditions. It can supply a load current up to

70 mA with an output voltage tolerance within ± 2%. Because of the ultra low current consumption, the

TLE8457C / TLE8457D is perfectly suited for applications permanently connected to the battery supply.

Additionally, in sleep mode, the voltage regulator is switched off and an even lower quiescent current can be

achieved.

The voltage regulator output is protected against undervoltage, overcurrent, overtemperature and power-up

falls below the undervoltage reset threshold.

multi-layer ceramic capacitors.

4.3.1

will be set logic “low” and the transceiver will be deactivated.

Figure 11

4.3.2

Reset output

The NRST output is used for issuing reset pulses, for example to an external microcontroller. In case of voltage

regulator undervoltage or overtemperature events, the NRST output will go “low” and the transceiver is

deactivated. The NRST output will stay “low” until a complete recovery from the failure is achieved. After the

While NRST is “low” mode transition is blocked.

can be implemented.

TLE8457CD_VCC_UNDERVOLTAGE

Normal Operation mode (EN = „high“)

Standby mode (EN = „low“)

NRST goes and stays „low“ as

long as

NRST stays „low“ for

additional Reset time

NRST

t

t