Automotive Low Dropout Linear Voltage Regulator LDO OPTIREG™ TLS820B2ELVSE Application Circuit

Open online SPICE simulator circuit link: atv_LDO_TLS820B2ELVSE_application_circuit_V2.TSC


Low Dropout Linear Voltage Regulator TLS820B2ELVSE
Application Circuit

Model performance :
- dynamic behavior not modeled (CQ/ESR stability, line/load transient response,
start-up, PSRR)
- static behavior is modeled 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 Watt
and Ambient Temperature = 85°C

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

{ Please double click here to enter design criteria }

{ Load Resistance }
R_Load := 100;
{ Number of Thermal Model }
THERMAL_MODEL := 1;
{ Ambient Temperature }
T_AMB := 25;

The OPTIREG™ Linear TLS820B2ELVSE 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 suitable for
automotive or other supply systems 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. This makes the TLS820B2ELVSE suitable for
automotive systems that need to operate during cranking condition.
The device can be switched on and off by the Enable feature.
The output voltage of TLS820B2ELVSE can be selected between 5 V and 3.3 V by connecting
the SEL pin to VQ or GND respectively.

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


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Voltage Regulator
Technical Assistance

Product info: TLS820B2ELVSE

Evaluation Board: TLS820B2ELVSE BOARD