Automotive Low Dropout Linear Voltage Regulator LDO OPTIREG™ TLS835B2ELVSE Application Circuit

Open online SPICE simulator circuit link: atv_LDO_TLS835B2ELVSE_application_circuit_V1.TSC

Low Dropout Linear Voltage Regulator TLS835B2ELVSE
Application Circuit

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

The OPTIREG™ Linear TLS835B2ELVSE is a linear voltage regulator with high performance,
very low dropout linear voltage and very low quiescent current. With an input voltage range of
3 V to 40 V and very low quiescent current of only 20 µA, this regulator is perfectly suited for
automotive or other supply systems which are permanently connected to the battery. The new
loop concept combines fast regulation and very high stability while requiring only one small
ceramic capacitor of 1 µF at the output. At output currents below 100 mA the device has a very
low dropout voltage of only 100 mV for an output voltage of 5 V and 120 mV for an output voltage
of 3.3 V. This makes the TLS835B2ELVSE suitable for automotive systems that need to operate
during cranking condition. The output voltage of TLS835B2ELVSE can be selected between 5 V
and 3.3 V by connecting the SEL pin to VQ or GND for an output voltage of 5 V and 3.3 V respectively.

The device has internal protection features such as output current limitation and overtemperature
shutdown, protect the device from immediate damage caused by failures such as output shorted to
GND, overcurrent or overtemperature conditions.

Model performance :
- dynamic behavior not modeled (CQ/ESR stability, line/load transient response,
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 = 2W
and Ambient Temperature = 85°C