Features

Max. supply voltage

VS

40 V

Output current

IO

300 mA

Quiescent current

Iqn

800 nA (1)

3.5 μA (2)

1. Maximum value with regulator disabled.

2. Maximum value with regulator enabled.

•

AEC-Q100 qualified

•

Wide input voltage range up to 40 V

•

Low quiescent current consumption

•

Output voltage options: 3.3 V or 5 V

•

Output voltage precision ± 2% in all operating conditions

•

Enable input for enabling/disabling the voltage regulator

•

Thermal shutdown and short-circuit current limitation

•

Undervoltage-lockout UVLO

•

Wide operating temperature range TJ = -40 °C to 175 °C

•

Sustaining slow ramp-up applications

•

Supply voltage rejection: > 60 dB at 1 kHz

•

Performant line and load regulation

Application

•

Automotive MCU power supplies

•

Body control modules

•

Telematics control units

•

Automotive head units

•

Headlights

Description

L99VR03 is a low dropout linear voltage regulator designed for automotive

applications available in VFDFN8L wettable flanks and PWSSO12 package. The

LDO delivers up to 300 mA of load current and consumes as low as 800 nA of

quiescent current when the regulator is disabled and only 3.5 µA quiescent current at

no load. The device is quite suitable for standby microprocessor control-unit systems,

especially in automotive applications. The input voltage operating range is up to 40 V.

The L99VR03 features enable. The L99VR03 is available in different output voltage

options (3.3 V or 5 V). High output voltage accuracy (±2%) is kept over wide

temperature range, line and load variation. The regulator output current is internally

limited so that the device is protected against short-circuit, as it features over

temperature protection.

VFDFN8L

3x2x0.9 mm

PWSSO12

4.9x3.9x1.5 mm

Product status link

L99VR03

Product summary

Order code

Package

Packing

3.3 V output voltage

L99VR033QTR VFDFN8L

Tape and

reel

L99VR033PTR PWSSO12

5 V output voltage

L99VR035QTR VFDFN8L

Tape and

reel

L99VR035PTR PWSSO12

Automotive low dropout linear voltage regulator having 300 mA of current

capability

L99VR03

Datasheet

DS14803 - Rev 2 - March 2025

For further information, contact your local STMicroelectronics sales office.

www.st.com