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AVANTICS - AX78LXX Series Specification No.: 050309-FE0004
AX78LXXAM/BM
AX78LXXAA/BA
3-Terminal Positive Voltage Regulators
Description
These regulators employ internal current-limiting and thermal-shutdown, making
them essentially indestructible. They can deliver up to 100mA output current.
Features
• Maximum Output Current of 100mA (T
C
=25°C)
• Internal Short-Circuit Current Limiting
• Internal Thermal Overload Protection
• TO-92 & SOT-89 Package
Absolute Maximum Ratings
(T
A
=25°C, Unles Otherwise Specified)
Characteristic Symbol Rating Unit
Input Voltage V
IN
40 V
TO-92 700 mW
Power Dissipation P
D
SOT-89 500 mW
Operating Temperature T
opr
-30 to 85
o
C
Storage Temperature T
stg
-55 to 150
o
C
Junction Temperature T
j
150
o
C
Thermal Resistance R
th(j-a)
208
o
C/W
Schematic Diagram & Equivalent Circuit
AX78LXX Series Pin Assignment
Typical Application
Schematic Diagram Equivalent Circuit
VOUT
VIN
3-Lead Plastic TO-92
Package Code: A
Pin 1: V
OUT
Pin 2: GND
Pin 3: V
IN
1
2
3
3-Lead Plastic SOT-89
Package Code: M
Pin 1: V
OUT
Pin 2: GND
Pin 3: V
IN
1
2
3
Note 1: C
IN
is required if regulator is located an
appreciable distance from power supply filter.
Note 2: C
OUT
is not needed for stability;
however, it does improve transient response.
Values of less than 0.1uF could cause
instability.
3 1
2
Starting
Circuit
Reference
Voltage
Current
Generator
Error
Amplifier
SOA
Protection
Thermal
Protection
Series
Pass
Element
Output
GND
Input
13
2
AX78LXX
Series
VOUTVIN
CIN
0.33uF
(Note 1)
COUT
0.1uF
(Note 2)