LM78L05 product image


Three-Terminal Positive Voltage Regulator
NSC [National Semiconductor]
TGS [Tiger Electronic Co.,Ltd]
FCI [First Components International]
KEXIN [Guangdong Kexin Industrial Co.,Ltd]
HTC Korea TAEJIN Technology Co.
HTSEMI [Shenzhen Jin Yu Semiconductor Co., Ltd.]


The LM78L05 three terminal positive regulators is available with several fixed output voltages making its useful in a wide range of applications. When used as a zener diode/resistor combination replacement, the LM78L05 usually results in an effective output impedance improvement of two orders of magnitude, and lower quiescent current. The LM78L05 regulator can provide local on card regulation, eliminating the distribution problems associated with single point regulation. The voltage available allow the LM78L05 to be used in logic systems, instrumentation, HiFi, and other solid state electronic equipment.


The LM78L05 is available in the plastic TO-92 (Z) package, the plastic SO-8 (M) package and a chip sized package (8-Bump micro SMD) using National’s micro SMD package technology. With adequate heat sinking the regulator can deliver 100 mA output current. Current limiting is included to limit the peak output current to a safe value. Safe area protection for the output transistors is provided to limit internal power dissipation. If internal power dissipation becomes too high for the heat sinking provided, the thermal shutdown circuit takes over preventing the IC from overheating.


LM78L05 Features


• LM78L05 in micro SMD package

• Output voltage tolerances of ±5% over the temperature range

• Output current of 100 mA

• Internal thermal overload protection

•Output transistor safe area protection

• Internal short circuit current limit

• Available in plastic TO-92 and plastic SO-8 low profile packages

• No external components

• Output voltages of 5.0V

Maximum Input Voltage VIN30 V
Maximum Maximum Power Dissipation at TA = 25°C / TO-92 PDMax0.770 W
Maximum Thermal Resistance Junction-To-Ambient / TO-92 θJA162 ℃/W
Maximum Lead Temperature (Soldering, 10 sec) TSOL260 ℃
Maximum Storage Temperature Range TSTG-65 to 150 ℃
Maximum Operating Junction Temperature Range TJOPR-40 to 150 ℃
LM78L05 Replacement Parts
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