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L99VR033QTR

L99VR033QTR

STMicroelectronics
Linear Voltage Regulator IC Positive Fixed 1 Output 300mA 8-VFDFN (3x2)
Active4,850 in stock
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Overview

The L99VR033QTR is an AEC-Q100 qualified linear voltage regulator designed specifically for automotive applications requiring a stable 3.3V supply from a high-voltage input up to 40V. It features an exceptionally low quiescent current of 3.5 uA at no load, making it ideal for battery-connected modules that must remain active during vehicle standby. The device is housed in a compact 8-VFDFN package with wettable flanks to facilitate automated optical inspection in manufacturing.

Why Choose This Part

The regulator offers a high PSRR of 76dB at 1kHz and a wide operating junction temperature range from -40C to 175C. Its thermal design includes short-circuit limitation, undervoltage-lockout (UVLO), and thermal shutdown to ensure reliability in harsh automotive environments.

Applications

Automotive Always-On Modules
Provides power to microcontrollers and CAN transceivers in ECUs that must remain powered while the ignition is off.
Electric Vehicle Battery Management Systems
Regulates local supply rails within high-voltage battery monitoring units where low standby current is critical.
Body Control Electronics
Powers sensors and control logic in door modules, seat controllers, and lighting units.

Key Specifications

PSRR 76dB (1kHz)
Output Type Fixed
Mounting Type Surface Mount, Wettable Flank
Package / Case 8-VFDFN Exposed Pad
Control Features Enable
Current - Output 300mA
Protection Features Over Current, Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 175degC (TJ)
Voltage - Input (Max) 40V
Voltage Dropout (Max) 1V @ 300mA
Current - Supply (Max) 200 uA
Supplier Device Package 8-VFDFN (3x2)
Current - Quiescent (Iq) 3.5 uA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

To evaluate this regulator, design a PCB with the 8-VFDFN footprint ensuring the thermal pad is soldered to a large copper area for heat dissipation. Connect a minimum output capacitor as specified in the datasheet to ensure stability and use the Enable pin for power sequencing or system sleep modes.