# 12V Automotive Low Dropout Adjustable Linear Voltage Post Regulator application circuit for 1.2 V to 5.25 V output voltage with TLS202A1MBV

### Adjustable Linear Voltage Post Regulator TLS202A1MBV

Application Circuit

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 = 0.25W

and Tamb = 85°C

The resistor divider for a specific output voltage can

be calculated as follows:

R1 = ((VQ/Vadj)-1)*R2

VAdj = Vref ≈ 1.2 V (should be tweaked to

actual simulated value in the design parameters

for accurate results),

and R2 ≤ 50 kΩ

For VQ_max = 5.25 V, R1 ≤ 3.3*R2

therefore R1_max = 165 kΩ

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 = 6: JEDEC 2s2p, no vias

THERMAL_MODEL = 10: No self heating, only TEMP value used as temperature

The TLS202A1MBV is a monolithic integrated adjustable linear voltage

post regulator for load currents up to 150 mA. The TLS202A1MBV regulates

an input voltage VI in the range of 2.7 V ≤ VI ≤ 18 V to an adjustable output

voltage of 1.2 V to 5.25 V with a precision of ±3 %. The TLS202A1MBV is

especially designed for applications requiring very low standby currents, e.g.

with a permanent connection to preregulators like DC-DC converters.

The TLS202A1MBV can be also used in all other applications requiring a

stabilized voltage of 1.2 V to 5.25 V.

The device is designed for the harsh environment of automotive applications.

Therefore it is protected against overload, short circuit and overtemperature

conditions by the implemented output current limitation and the overtemperature

shutdown circuit.

{ Please double click here to enter design criteria }

{ Select required Voltage }

V_Q := 5;

{ Select known Resistor: 1 for R1, 2 for R2 }

R1orR2 := 1;

{ Select Value for known Resistor (R1 or R2) }

R := 40k;

{ Vref defined as a typical value of 1.2 V in the datasheet }

Vref := 1.2;

{ Load Resistance }

R_Load := 100;

{ Number of Thermal Model }

THERMAL_MODEL := 1;

{ Ambient Temperature }

T_AMB := 25;

Product info: TLS202A1MBV

Technical Assistance

Other circuits

Demo Board: DEMOBOARD TLS202A1

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