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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 100MA SOT89-3
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：30V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：100mA
- Current - Quiescent (Iq)：5.5 mA
- Current - Supply (Max)：6 mA
- PSRR：49dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-243AA
- Supplier Device Package：SOT-89-3
- Grade：-
- Qualification：-
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Overview
The L78L33ABUTR is a three-terminal positive linear voltage regulator from the STMicroelectronics L78L series, housed in an SOT-89 surface-mount package. It provides a fixed output voltage of 3.3 V with a maximum output current of 100 mA. The device operates within an extended junction temperature range of -40 °C to +125 °C and supports input voltages up to 30 V for this output level. Electrical characteristics include a typical quiescent current of 6 mA at 25 °C, line regulation of 100 mV (VI = 6.3 to 20 V), and load regulation of 30 mV (IO = 1 to 40 mA).
Feature Summary
- Internal current limiting and thermal shutdown protection ensure robust operation.
- Designed as a fixed voltage regulator for local or on-card regulation applications.
- Functions as a replacement for Zener diode/resistor combinations with lower noise.
- Requires no external components for basic voltage regulation functionality.
Applications
- Local or on-card voltage regulation
- Elimination of noise associated with single-point regulation
- Replacement for Zener diode and resistor combinations
Procurement Notes
Verify that the specific part number matches the required tolerance grade, indicated by the 'A' suffix for ±4% accuracy. Confirm the SOT-89 package type aligns with the printed circuit board footprint design. Ensure the operating environment stays within the specified -40 °C to +125 °C junction temperature range for reliable performance.
Selection Notes
Select this component when a fixed 3.3 V output is required with moderate current demands up to 100 mA. The SOT-89 package offers a compact solution for surface-mount designs. Consider the thermal resistance characteristics and available copper area for heat dissipation if operating near maximum current limits.
Part Context
This device belongs to the L78L series of three-terminal positive regulators manufactured by STMicroelectronics. The series includes various fixed output voltages and packages such as TO-92, SO-8, and SOT-89. The 'AB' designation specifies the extended temperature range and tighter voltage tolerance compared to standard variants.
FAQ
What is the output voltage tolerance for the L78L33ABUTR?
The 'A' suffix indicates a ±4% output voltage tolerance.
Does the L78L33ABUTR require external capacitors?
No external components are required for basic operation, though capacitors may be used for stability in specific applications.
