Automotive Low Dropout Linear Voltage Tracking Regulator OPTIREG™ TLE4253E: typical application circuit

Open online SPICE simulator circuit link: atv_LDO_TLE4253E_application_circuit.tsc

Automotive Low Dropout Voltage Tracking Regulator TLE4253E
Application Circuit

The TLE4253E is a monolithic integrated low-dropout voltage tracking regulator in small
PG-DSO-8 packages. The exposed pad (EP) package variant PG-DSO-8 exposed pad
offers extremely low thermal resistance. The IC is designed to supply off-board systems,
e. g. sensors in engine management systems under the severe conditions of automotive
applications. Therefore, the IC is equipped with additional protection functions against
reverse polarity and short circuit to GND and battery. With supply voltages up to 40 V,
the output voltage follows a reference voltage applied at the adjust input with high accuracy.
The reference voltage applied directly to the adjust input or by an e. g. external resistor
divider can be 2.0 V minimum. The output is able to drive loads up to 250 mA.
The TLE4253 tracker can be set into shutdown mode in order to reduce the quiescent
current to an extremely low value. This makes the IC suitable to low-power battery applications.

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 = 1 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, with vias
THERMAL_MODEL = 10: No self-heating, only TEMP value used as a temperature