Automotive Low Dropout (LDO) Linear Voltage Regulator Integrated Current Monitor OPTIREG™ TLF4277EL application circuit for 5.0 V output voltage

Open online SPICE simulator circuit link: atv_LDO_TLF4277EL_application_circuit.tsc

Automotive Low Dropout (LDO) Linear Voltage Regulator Integrated Current
Monitor OPTIREG™ TLF4277EL
Application Circuit

The TLF4277EL is a monolithic integrated low drop out voltage regulator capable of supplying loads up to 200 mA.
For an input voltage up to 40 V the TLF4277 provides an adjustable output voltage in a range from 5 V up to 12 V.
The integrated current monitor function is a unique feature that provides diagnosis and system protection
functionality. Fault conditions such as overtemperature and output overvoltage are monitored and indicated at the
current sense output. The maximum output current limit of the device is adjustable to provide additional protection
to the connected load. Via the enable function the IC can be disabled to lower the power consumption.

Thermal model description:
THERMAL_MODEL = 1: PG-SSOP-14 1s0p 600mm2 cooling area
THERMAL_MODEL = 2: PG-SSOP-14 1s0p 300mm2 cooling area
THERMAL_MODEL = 3: PG-SSOP-14 1s0p, footprint
THERMAL_MODEL = 4: PG-SSOP-14 2s2p
THERMAL_MODEL = 10: No self-heating, only TEMP value used as a temperature

Model performance :
- dynamic behavior (start-up, PSRR)
- static behavior is modelled by approximation to the real behavior of the device
over temperature
- the thermal simulations represent an approximation of the actual thermal
behavior of the device according to the JEDEC standards at Power = 2 W
and Ambient Temperature = 85 °C and no delamination