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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 100MA TO92-3
- Series：-
- Mfr：STMicroelectronics
- Package：Cut Tape (CT),Tape & Box (TB)
- 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：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The L78L33ABZ-AP is a three-terminal positive linear voltage regulator from the L78L series, manufactured by STMicroelectronics. It provides a fixed output voltage of 3.3 V with an output current capability up to 100 mA. The device features internal current limiting and thermal shutdown protection. It operates within a DC input voltage range of 5.3 V to 30 V. The quiescent current is typically 6 mA at 25 °C. The component is housed in a TO-92 package with three pins and supports an operating junction temperature range of -40 °C to +125 °C.
Feature Summary
- Internal current limiting and thermal shutdown protection for robust operation
- Fixed 3.3 V output voltage with ±4% tolerance
- No external components required for basic regulation
- Capable of delivering up to 100 mA output current
Applications
- Local or on-card voltage regulation
- Replacement for Zener diode/resistor combinations
- Building high-current regulators when used with power pass elements
Procurement Notes
Verify the specific suffix 'AB' indicates the ±4% output voltage tolerance and extended temperature range compared to standard variants. Confirm the 'Z' designation corresponds to the TO-92 through-hole package. Ensure the ordering code matches the exact manufacturer part number to avoid discrepancies in electrical characteristics or packaging type.
Selection Notes
Select this component for applications requiring a simple, fixed 3.3 V supply with moderate current demands. The wide input voltage range allows flexibility in source selection. Consider the thermal resistance of the TO-92 package and potential heat dissipation requirements when designing the PCB layout for adequate cooling under maximum load conditions.
Part Context
This device belongs to the L78Lxx family of three-terminal positive regulators. The series offers various fixed output voltages including 3.3, 5, 6, 8, 9, 10, 12, 15, 18, and 24 V. The L78L series is designed for general-purpose regulation tasks where simplicity and reliability are prioritized over low dropout performance.
Replacement Considerations
L78L33ACZ-AP (±8% tolerance, 0°C to 125°C range)
FAQ
What is the difference between the L78L33ABZ-AP and L78L33ACZ-AP?
The L78L33ABZ-AP offers a tighter output voltage tolerance of ±4% and supports a wider operating temperature range (-40°C to 125°C), whereas the AC variant has ±8% tolerance and a 0°C to 125°C range.
Does the L78L33ABZ-AP require external capacitors?
While no external components are strictly required for basic operation, the datasheet specifies test circuits using input and output capacitors (typically 0.33 µF and 0.1 µF) for stability and noise reduction.
