Features
Description
GM6603 of positive adjustable and fixed regulators are de-
signed to provide 3.0A output with low dropout voltage per-
formance.
Adjustable or Fixed Output
Output Current of 3.0A
Dropout Voltage (typical) 1.15V @ 3.0A
Typical Line Regulation 0.04%
Typical Load Regulation 0.2%
Fast Transient Response
On-chip trimming adjusts the reference voltage to 2.0%. To
work in post regulators or microprocessor power supplies
where low voltage operation and fast transient response
are required.
Current Limit Protection
Device includes over-current protection and thermal shut-
down protection as well.
Thermal Shutdown Protection
Pin-to-pin compatible with LT1085 family of regulators,
GM6603 is available in TO-252, TO-220, and surface-
mount TO-263 packages.
Application
Printer Supplies
Motherboards
Microprocessor Supply
Post Regulators for Switching Supplies
Telecommunication Systems
TYPICAL APPLICATION CIRCUITS
(Adjustable Version)
(Fixed Version)
GM6603-Adj
V
IN
> 4.75V
GM6603-3.3
V
OUT
= 3.45V
V
IN
> 4.75V
3
V
= 3.3V
OUT
2
3
V
V
2
OUT
IN
V
V
OUT
IN
R1
ADJ
1
133W
1.0%
GND
1
+
+
+
+
C1
C2
C1
C2
10µF
Tant. Min
10µF
Tant
10µF
10µF
Tant
R2
Tant. Min
232W
1.0%
R2
R1
V
OUT
= V
REF
X (1 +
) + I
X R2
ADJ
Notes:
1. C1 neededif device isfar from filter capacitors
2. C2 minimumvalue required forstability
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