Hello! now
tms@lcdchip.com
STMicroelectronics L78L05ACUTR
- Part No.:
- L78L05ACUTR
- Manufacturer:
- STMicroelectronics
- Package:
- TO-243AA
- Description:
- IC REG LINEAR 5V 100MA SOT89-3
- Quantity:
Unit Price:$0
Ext Price:$0
- Payment:
- Shipping:
Product Details
L78L05ACUTR - 5 V, 100 mA Positive Voltage Regulator
STMicroelectronics L78L05ACUTR is a fixed 5 V three-terminal positive linear regulator in a SOT-89 package, with output capability up to 100 mA when thermal conditions permit.
Electrical characteristics, pin assignment, package, marking, and ordering status were checked against ST data sheet DS0424 Rev. 30 and the exact manufacturer listing.
Overview
The L78L05ACUTR provides a nominal 5 V regulated output for local or on-card power rails. Internal current limiting, short-circuit protection, and thermal shutdown simplify implementation. The AC option uses the tighter A-grade output selection and is characterized from 0 degrees C to +125 degrees C junction temperature.
Key Advantages
Fixed 5 V rail
No feedback divider is required for the nominal output voltage.
Three-terminal simplicity
Only input, ground, and output connections are required for the regulator itself.
Integrated protection
Internal current limiting, short-circuit protection, and thermal shutdown improve fault tolerance.
A-grade selection
The 5 V output is selected to the tighter family tolerance and specified across the AC temperature range.
Feature Summary
Up to 100 mA
The family supports output current to 100 mA with adequate heat sinking.
5 V output selection
The device is specified at 4.8 V to 5.2 V at 25 degrees C.
Low-noise regulation
Typical output-noise voltage is 40 microvolts over 10 Hz to 100 kHz.
SOT-89 implementation
The compact surface-mount package can use board copper as a heat spreader.
Package & Footprint
ST specifies L78L05ACUTR in the three-lead SOT-89 package. The catalog designation TO-243AA is a registered mechanical alias for this package family.
- Use the current ST SOT-89 footprint and verify top-view pin orientation.
- Provide sufficient copper area when higher dissipation is expected.
- Place bypass capacitors close to input, output, and ground.
- Calculate junction temperature from input voltage, load current, ambient, and board thermal design.
The registered JPG is checked locally and in production before publication.
Pin Functions
The SOT-89 assignment below is the top view shown by ST.
Do not assume pin compatibility from package appearance; verify the exact L78L SOT-89 drawing before PCB release.
Key Specifications
| Manufacturer | STMicroelectronics |
|---|---|
| Regulator type | Fixed positive linear voltage regulator |
| Nominal output | 5 V |
| Output at 25 degrees C | 4.8 V minimum, 5.0 V typical, 5.2 V maximum |
| Output over stated line and load conditions | 4.75 V minimum, 5.25 V maximum |
| Output current | Up to 100 mA with adequate thermal design |
| Maximum DC input rating | 30 V for 3.3 V to 9 V variants |
| Dropout voltage | 2 V typical under the stated data-sheet condition |
| Quiescent current | 6 mA maximum at 25 degrees C |
| Load regulation | 60 mV maximum from 1 mA to 100 mA at 25 degrees C |
| Output noise | 40 microvolts typical, 10 Hz to 100 kHz |
| Supply rejection | 41 dB minimum, 49 dB typical at 120 Hz under the stated condition |
| Operating junction temperature | 0 degrees C to +125 degrees C |
| Package | SOT-89, catalog alias TO-243AA; tape-and-reel |
Limits depend on the stated test circuit and temperature. ST's table uses 0.33 microfarad input and 0.1 microfarad output capacitors.
Replacement Considerations
A replacement must preserve the fixed 5 V output, required load current, SOT-89 footprint, VOUT/GND/VIN pin order, input rating, dropout, stability, protection, and temperature range. The AB version extends below 0 degrees C, while other voltage and package variants require separate review.
No internal replacement link is asserted without an exact API-confirmed catalog match and engineering review.
Manufacturer Information
STMicroelectronics lists L78L05ACUTR as an active industrial product. L78L05 identifies the 5 V family member, AC identifies the A-selection device characterized from 0 degrees C to +125 degrees C, U identifies SOT-89, and TR identifies tape-and-reel packaging. The documented marking is 8C.
Applications
Local regulation
Create a 5 V rail close to a load to reduce distribution-related noise and voltage variation.
Control electronics
Supply low-current controllers, interfaces, and analog support circuits.
Zener replacement
Replace a Zener-resistor regulator where improved regulation and lower noise are needed.
Current-boosted regulators
The family can drive external pass-element circuits when a separately engineered higher-current solution is required.
Quality & Authenticity
Confirm the exact L78L05ACUTR order code, 8C marking, reel label, SOT-89 dimensions, lead finish, and lot traceability during incoming inspection. Package appearance alone does not establish authenticity. Electrical verification should use the latest ST limits and test circuit.
FAQ
What output voltage does L78L05ACUTR provide?
It is the fixed 5 V member of the L78L positive-regulator family.
Can it continuously supply 100 mA?
Only when input headroom, power dissipation, board copper, ambient temperature, and junction temperature permit.
What is the pin order?
For the SOT-89 top view, pin 1 is VOUT, pin 2 is GND, and pin 3 is VIN.
What capacitors are used in the test circuit?
ST specifies 0.33 microfarad at the input and 0.1 microfarad at the output.
What temperature range applies?
The AC option is characterized from 0 degrees C to +125 degrees C junction temperature.
Engineering Notice
Validate minimum input voltage, dropout headroom, startup and load transients, capacitor placement, and junction temperature in the final circuit. Power dissipation rises with (VIN minus 5 V) multiplied by load current, so the thermal limit can dominate well below the absolute input rating.
L78L05ACUTR Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 5V
- 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:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
- Include Parts
- Popular Search
The following parts include "L78L05ACUTR" in Silicon Labs L78L05ACUTR.
- Part Number
- Manufacturer
- Package
- Description
- MIC5504-1.8YM5-TR Microchip Technology SC-74A, SOT-753 IC REG LINEAR 1.8V 300MA SOT23-5
- MIC5504-3.3YM5-TR Microchip Technology SC-74A, SOT-753 IC REG LINEAR 3.3V 300MA SOT23-5
- MIC5365-3.0YC5-TR Microchip Technology 5-TSSOP, SC-70-5, SOT-353 IC REG LINEAR 3V 150MA SC70-5
- MIC5365-1.8YC5-TR Microchip Technology 5-TSSOP, SC-70-5, SOT-353 IC REG LINEAR 1.8V 150MA SC70-5
- MIC5365-2.5YC5-TR Microchip Technology 5-TSSOP, SC-70-5, SOT-353 IC REG LINEAR 2.5V 150MA SC70-5
- MIC5365-3.3YC5-TR Microchip Technology 5-TSSOP, SC-70-5, SOT-353 IC REG LINEAR 3.3V 150MA SC70-5
- MIC5365-3.3YD5-TR Microchip Technology SOT-23-5 Thin, TSOT-23-5 IC REG LIN 3.3V 150MA TSOT23-5
- MIC5317-3.3YM5-TR Microchip Technology SC-74A, SOT-753 IC REG LINEAR 3.3V 150MA SOT23-5
- TLV1117LV33DCYR Texas Instruments TO-261-4, TO-261AA IC REG LINEAR 3.3V 1A SOT223-4
- MIC5317-3.3YMT-TZ Microchip Technology 4-UDFN Exposed Pad IC REG LINEAR 3.3V 150MA 4DFN
The following parts are popular search parts in Test and Measurement.
Inventory:51,277
Please send an inquiry. Send us your inquiry, and we will respond immediately.
