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LM78L05ACZ/NOPB

TILM78L05ACZ/NOPB

Texas Instruments
Linear Voltage Regulator IC Positive Fixed 1 Output 100mA TO-92-3
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Overview

The LM78L05ACZ/NOPB is a fixed positive voltage regulator capable of delivering up to 100mA of output current. It is a three-terminal device in a through-hole TO-92 package designed for local on-card regulation, effectively eliminating noise and distribution problems associated with single-point regulation. This regulator includes internal thermal-overload protection and short-circuit current limiting to prevent device failure during fault conditions.

Why Choose This Part

The device features a high Power Supply Rejection Ratio of 62dB at 120Hz, making it excellent at filtering input ripple. It is highly robust with integrated over-temperature and short-circuit protection, and its TO-92 package is ideal for simple through-hole assembly and prototyping.

Applications

Local On-Card Regulation
Provides a stable 5V rail for logic circuits directly at the point of load on a PCB.
Voltage Step-Down
Converts higher DC input voltages up to 35V down to a regulated 5V output for low-power microcontrollers and sensors.
Post-Regulation
Filters and stabilizes the output of switching power supplies to provide a low-noise rail for sensitive analog components.
Battery Powered Devices
Acts as a simple, low-component-count regulator for portable electronics requiring a steady 5V supply.

Key Specifications

PSRR 62dB (120Hz)
Output Type Fixed
Mounting Type Through Hole
Package / Case TO-226-3, TO-92-3 (TO-226AA)
Current - Output 100mA
Protection Features Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature 0degC ~ 125degC
Voltage - Input (Max) 35V
Supplier Device Package TO-92-3
Current - Quiescent (Iq) 3 mA
Voltage - Output (Min/Fixed) 5V

Getting Started

To implement this regulator, connect the input pin to a DC source (up to 35V) and the output pin to your load, ensuring a common ground. While the LM78L series is stable without capacitors in many applications, it is standard practice to use a 0.33uF ceramic capacitor on the input and a 0.1uF capacitor on the output to improve transient response and stability.

Also Consider

MC78L05ABPG ONonsemi - Offers similar 100mA 5V regulation in a TO-92 package with a wider specified operating temperature range.