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Product Detailed Parameters
- Description：IC REG LINEAR 24V 100MA TO92-3
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：24V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：100mA
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：6.5 mA
- PSRR：37dB (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)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The L78L24ABZ-TR is a three-terminal positive linear voltage regulator from the STMicroelectronics L78L series, housed in a TO-92 package. It provides a fixed output voltage of 24 V with a maximum output current of 100 mA. The device features an extended operating junction temperature range of -40 °C to +125 °C and includes internal thermal overload protection and short-circuit protection. Electrical characteristics specify a quiescent current of 6.5 mA at 25 °C, a dropout voltage of 1.7 V, and a supply voltage rejection ratio of 37 dB at 120 Hz.
Feature Summary
- Internal current limiting and thermal shutdown mechanisms ensure robust operation under fault conditions.
- Designed for local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation.
- Functions as a direct replacement for Zener diode and resistor combinations while offering lower quiescent current and reduced noise.
- Requires no external components for basic fixed voltage regulation applications.
Applications
- Local or on-card voltage regulation
- Replacement for Zener diode/resistor networks
- Power pass element integration for high-current regulators
Procurement Notes
Verify that the ordering suffix 'Z' corresponds to the TO-92 package configuration and '-TR' indicates tape and reel packaging. Confirm the 'AB' suffix aligns with the required -40 °C to +125 °C operating temperature range and ±4% output voltage tolerance specifications before finalizing procurement.
Selection Notes
Select this component when a fixed 24 V output is required within the L78L series. The AB suffix denotes extended temperature capability compared to standard AC variants. Ensure input voltage remains within the absolute maximum rating of 40 V for the 24 V output version. Verify thermal dissipation requirements given the TO-92 package's thermal resistance characteristics.
Part Context
This part belongs to the L78Lxx family of low-power positive voltage 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 characterized by its simplicity, requiring minimal external circuitry, and is suitable for applications where moderate current levels up to 100 mA are sufficient.
FAQ
What is the maximum input voltage for the L78L24AB?
The maximum DC input voltage for the L78L24 variant is 40 V.
Does the L78L24AB require external capacitors?
No external components are strictly required for basic operation, though typical application circuits often include input and output capacitors for stability.
What is the quiescent current at elevated temperatures?
The quiescent current decreases slightly to 6 mA at a junction temperature of 125 °C, down from 6.5 mA at 25 °C.
