Automotive Low Dropout (LDO) Linear Fixed Voltage Regulator OPTIREG™ TLF80511EJ V33 Application Circuit

Open online SPICE simulator circuit link: atv_LDO_TLF80511EJV33_application_circuit.TSC

Automotive Low Dropout Linear Fixed Voltage Regulator OPTIREG™ TLF80511EJ V33
Application Circuit

The TLF80511EJ is a linear low dropout voltage regulator for load currents up to 400 mA. An input voltage of up
to 40 V is regulated to VQ,nom = 5 V (TLF80511EJV50) with ±2 % precision.
The TLF80511EJ with a typical quiescent current of 38 µA, is the ideal solution for systems requiring very low
operating currents, such as those permanently connected to a battery.

It features a very low dropout voltage of 100 mV, when the output current is less than 100 mA. This makes the
TLF80511EJ suitable to supply automotive systems. In addition, the TLF80511’s new fast regulation concept
requires only a single, 1 µF output capacitor to maintain stable regulation.
The device is designed for the harsh environment of automotive applications. Therefore standard features like
output current limitation and overtemperature shutdown are implemented and protect the device against failures
like output short circuit to GND, over-current and over-temperatures. The TLF80511EJ can be also used in all
other applications requiring a stabilized 5 V supply voltage.

Thermal model description:
THERMAL_MODEL = 1: DS08 1s0p 600mm2 cooling area
THERMAL_MODEL = 2: DS08 1s0p, footprint
THERMAL_MODEL = 3: JEDEC 2s2p
THERMAL_MODEL = 10: No self-heating, only TEMP value used as a temperature