GM78L00
100 mA POSITIVE VOLTAGE REGULATORS
Revision 1, May 2002
www.gammamicro.com
PRELIMINARY
2
31
3
2
Wide range of Fixed Output Voltages
Output Current up to 100 mA
No External Components Required
Internal Thermal Overload Protection
Internal Short Circuit Current-Limiting
Available in TO-92, SOT-89 and SOP-8 packages
The GM78L00 series of positive voltage regulators are low-cost
devices providing a simple solution for a wide variety of applica-
tions requiring a regulated supply of up to 100mA.
These virtually indestructible positive voltage regulators are pro-
tected by thermal shutdown and internal current-limiting. Most
applications require no external components.
The GM78L00’s are very versatile. Use them as fixed voltage regu-
lators in a wide range of applications, including local on-card regu-
lation for elimination of noise and distribution problems associated
with single-point regulation. They can also be used with power
pass elements to make high current voltage regulators.
The GM78L00’s offer impressive performance advantages over old-
fashioned zener diode-resistor combinations, providing lower out-
put impedance and reduced quiescent current, along with lower
noise.
OUTPUT
GND
GROUND
INPUT
V
IN
NC
NC
TO-92 (TOP VIEW)
PIN CONFIGURATIONS
REPRESENTATIVE BLOCK DIAGRAM
1
V
OUT
GND
GND
GND
INPUT
Z1
1.2k
420
Q2
1.9k
2.2k
Q7
Q8
Q9
Q6
Q4
Q1
3.8k
15k
Q3
Q5
Q11
Q12
Q10
5.0k
3.0k
0-25k
2.85k
C
1.0k
GROUND
OUTPUT
1
2
3
4
8
7
6
5
1
3
2
VOUT
VIN
SOT-89 (Top View)
SOP-8 (TOP VIEW)
GND
