Product overview
Description
The L79L series of three-terminal negative regulators employ internal current limiting and thermal shutdown, making them essentially indestructible. If adequate heat-sink is provided, they can deliver up to 100 mA output current. They are intended as fixed voltage regulators in a wide range of applications including local or on-card regulation for elimination of noise and distribution problems associated with single-point regulation. In addition, they can be used with power pass elements to make high-current voltage regulators. The L79L series used as Zener diode/resistor combination replacement, offers an effective output impedance improvement of typically two orders of magnitude, along with lower quiescent current and lower noise.
-
All features
- Output current up to 100 mA
- Output voltages of -5; -8;-12; -15 V
- Thermal overload protection
- Short-circuit protection
- No external components are required
- Output tolerance + 4%
eDesignSuite
eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.
Power Management Design Center
Thermal-electrical Simulators for Components
Signal Conditioning Design Tool
NFC/RFID Calculators
Choose design tool: 
Power Management Design Center
Power Supply Design Tool
• SMPS design, by topology, by type and by product
• PFC design with analog and digitial control
• Supports various PCB configurations
Choose type: DC/DC AC/DC Solar Battery Charger
Power Management Design Center
LED Lighting Design Tool
• Handles AC-DC and DC-DC design in common topologies
• Displays interactive and annotated schematic
• Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data
Choose type: DC/DC AC/DC
Power Management Design Center
Digital Power Workbench
• Provides a step-by-step optimized design of power section and control loop
• Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs
Power Management Design Center
Power Tree Designer
• Specify input/output power for each node in the tree
• Check for consistency
• Design each individual node
Choose design tool: 
Thermal-electrical Simulators for Components
AC Switches Simulator
• Select ratings and application waveforms
• Get junction temperature and blocking voltage graphs
• Search and sort suitable devices
Thermal-electrical Simulators for Components
Rectifier Diodes Simulator
• Select ratings and application waveforms
• Estimate power losses
• Search and sort suitable devices
Thermal-electrical Simulators for Components
STPOWER Studio
• Supports long mission profiles
• Provides power loss and temperature graphs
• Helps define heatsink thermal properties
Thermal-electrical Simulators for Components
Twister Sim
• Help select the right ViPOWER Automotive power device
• Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis
• Supports various PCB configurations
Thermal-electrical Simulators for Components
TVS Simulator
• Specify system ratings and surge waveform
• Search and sort suitable devices
Thermal-electrical Simulators for Components
Estimate
• Build simple schematics and firmware inputs in minutes
• Quickly generate reliable estimates of battery life, system power consumption and bill of materials costs
Thermal-electrical Simulators for Components
PCB Thermal Simulator
• Thermal analysis of a PCB from Gerber files.
• Possibility to add heat sources, heat sinks, copper areas and thermal paths.
• Powerful server-side engine for rendering and simulation.
• Thermal results shown graphically via 2D table.
Choose design tool: 
Signal Conditioning Design Tool
Active Filters
• Handles multi-stage-designs and common topologies
• Returns circuit component values
• Provides gain, phase and group delay graphs
• Low Pass, High Pass and Band Pass
Signal Conditioning Design Tool
Comparators
• Handles most common configurations
• Returns circuit components values
• Provides I/O signal waveforms
• Inverting, Non Inverting, Window
Signal Conditioning Design Tool
Low side Current Sensing
• Returns circuit component values
• Provides current error graphs
Signal Conditioning Design Tool
High side Current Sensing
• Provides current error graphs.
• Help to select the right High side current sensing and shunt devices.
Choose design tool: 
NFC/RFID Calculators
NFC Inductance
• Input geometry and substrate properties
• Get antenna impedance
NFC/RFID Calculators
UHF Link Budget
• Enter forward and reverse link characteristics
• The tool returns link budget estimate
NFC/RFID Calculators
NFC Tuning Circuit
• Enter antenna parameter and matching target
• Select the topology of the matching network
• The tool returns component values for the desired design targets
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L79L
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
Please select one model supplier :
Symbols
Footprints
3D models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L79L05ABD13TR | Active | SO-8 | Industrial | Ecopack2 | |
| L79L05ABUTR | Active | SOT-89 | Industrial | Ecopack2 | |
| L79L05ABZ-AP | Active | TO-92 | Industrial | Ecopack2 | |
| L79L05ACD13TR | Active | SO-8 | Industrial | Ecopack2 | |
| L79L05ACUTR | Active | SOT-89 | Industrial | Ecopack2 | |
| L79L05ACZ | Active | TO-92 | Industrial | Ecopack2 | |
| L79L05ACZ-TR | Active | TO-92 | Industrial | Ecopack2 | |
| L79L08ACD13TR | Active | SO-8 | Industrial | Ecopack2 | |
| L79L08ACZ-AP | Active | TO-92 | Industrial | Ecopack2 | |
| L79L12ACD13TR | Active | SO-8 | Industrial | Ecopack2 | |
| L79L12ACUTR | Active | SOT-89 | Industrial | Ecopack2 | |
| L79L12ACZ-TR | Active | TO-92 | Industrial | Ecopack2 | |
| L79L15ABD13TR | Active | SO-8 | Industrial | Ecopack2 | |
| L79L15ACD13TR | Active | SO-8 | Industrial | Ecopack2 | |
| L79L15ACUTR | Active | SOT-89 | Industrial | Ecopack2 |
L79L05ABD13TR
Package:
SO-8Material Declaration**:
L79L08ACZ-AP
Package:
TO-92Material Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
Don't show this again
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||||
| L79L15ACUTR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L05ABZ-AP | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L12ACUTR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L08ACZ-AP | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L15ACD13TR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L05ABUTR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L12ACD13TR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L15ABD13TR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L05ACZ-TR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L05ABD13TR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L05ACD13TR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L12ACZ-TR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L05ACUTR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L05ACZ | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L79L08ACD13TR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
L79L15ACUTR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L05ABZ-AP Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L12ACUTR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L08ACZ-AP Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L15ACD13TR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L05ABUTR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L12ACD13TR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L15ABD13TR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L05ACZ-TR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L05ABD13TR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L05ACD13TR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L12ACZ-TR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L05ACUTR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L05ACZ Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
L79L08ACD13TR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
Don't show this again
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors