Description
GM6603 of positive adjustable and fixed regulators are de-
signed to provide 3.0A output with low dropout voltage per-
formance.
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.
Device includes over-current protection and thermal shut-
down protection as well.
Pin-to-pin compatible with LT1085 family of regulators,
GM6603 is available in TO-252, TO-220, and surface-
mount TO-263 packages.
Features
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
Current Limit Protection
Thermal Shutdown Protection
Application
Microprocessor Supply
Post Regulators for Switching Supplies
Printer Supplies
Motherboards
Telecommunication Systems
TYPICAL APPLICATION CIRCUITS
(Adjustable Version)
(Fixed Version)
V
IN
> 4.75V
GM6603-Adj
3
V
IN
ADJ
V
OUT
2
R1
133W
1.0%
R2
232W
1.0%
V
OUT
= 3.45V
V
IN
> 4.75V
3
GM6603-3.3
V
OUT
2
V
IN
GND
V
OUT
= 3.3V
+
1
C1
10µF
Tant
+
C2
10µF
Tant. Min
+
1
C1
10µF
Tant
+
C2
10µF
Tant. Min
V
OUT
=
V
REF
X (1 +
R2
) + I
ADJ
X
R2
R1
Notes:
1. C1 needed if device is far from filter capacitors
2. C2 minimum value required for stability
www.gammamicro.com
GM6603
V0.1
1
GAMMA [ GAMMA MICROELECTRONICS INC. ]
