Data Sheet
3-TERMINAL POSITIVE LINEAR REGULATOR
AZ78LXX
General Description
Features
The AZ78LXX series are three terminal positive regu-
lators with several fixed output voltages. These regula-
tors can provide local on card regulation, eliminating
the distribution problems associated with single point
regulation. The AZ78LXX can be used in logic sys-
tems, instrumentation, HiFi, and other solid state elec-
tronic equipment. When used as a Zener diode/resistor
combination replacement, the AZ78LXX usually
results an effective output impedance improvement of
two orders of magnitude, and lower quiescent current.
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Output Current up to 100 mA
Fixed Output Voltage of 5V, 8V, 9V and 12V
Output Voltage Tolerances of ±5% over the Full
Temperature Range
Internal Short Circuit Current-Limiting
Internal Thermal Overload Protection
No External Components
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Applications
With adequate heat sinking the AZ78LXX can deliver
100 mA output current. Current limiting is included to
limit the peak output current to a safe value. Thermal
protection is also provided. If internal power
dissipation becomes too high for the heat sinking
provided, the thermal shutdown circuit takes over
preventing the IC from overheating.
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High Efficiency Linear Regulator
Post Regulation for Switching Supply
Microprocessor Power Supply
Mother Board I/O Power Supply
The AZ78LXX are available in the plastic TO-92,
SOIC-8, SOT-223 and SOT-89 packages.
TO-92
SOIC-8
SOT-89
SOT-223
Figure 1. Package Types of the AZ78LXX
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 3
1