GM6603
3.0A PRECISION LINEAR REGULATORS
Power Management
Description
The GM6603 series of positive adjustable and fixed regula-
tors are designed to provide 3.0A output with low dropout
voltage performance.
On-chip trimming adjusts the reference voltage to 2.0%.
Put them to work in post regulators or microprocessor
power supplies where low voltage operation and fast tran-
sient response are required.
Device includes over-current protection and thermal shut-
down protection as well.
Pin-to-pin compatible with the LT1085 family of regulators,
the GM6603's are available in TO-252, TO-220 and sur-
face-mount TO-263 packages.
Features
Adjustable or Fixed Output
Output Current of 3.0A
Dropout Voltage (typical) 1.3V @ 3.0A
Typical Line Regulation 0.015%
Typical Load Regulation 0.05%
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
OUT
= 3.45V
V
IN
> 4.75V
3
V
IN
ADJ
V
OUT
2
R1
133W
1.0%
R2
232W
1.0%
V
IN
> 4.75V
3
V
OUT
= 3.3V
GND
+
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
PRELIMINARY
GM6603
1
Revision 1, Jun. 2004
GM6603-Adj
GM6603-3.3
V
OUT
2
V
IN
GM6603
MARKING INFORMATION & PIN CONFIGURATIONS
(Top View)
TO-252(DPAK)
TO-220
TO-263-2 (D PAK)
2
GM6603
VVAYWW
GM6603
GM6603
VVAYWW
VVAYWW
V
IN
V
OUT
ADJ/GND*
V
OUT
V V, V = Output Voltage(A =
Adj
,33 = 3.3V)
A
= Assembly Location
Y
= Year
W W = Work Week
V
IN
V
OUT
V
IN
ADJ/GND*
ADJ/GND*
On fixed versions Pin 1 = GND,
on adjustable versions Pin 1 = ADJ
Tab = V
OUT
ORDERING INFORMATION
Ordering Number
GM6603-ATA3T
GM6603-ATA3R
GM6603-ATC3T
GM6603-ATC3R
GM6603-ATB3T
GM6603-1.5TA3T
GM6603-1.5TA3R
GM6603-1.5TB3T
GM6603-1.8TA3T
GM6603-1.8TA3R
GM6603-1.8TC3T
GM6603-1.8TC3R
GM6603-1.8TB3T
GM6603-2.5TA3T
GM6603-2.5TA3R
GM6603-2.5TB3T
GM6603-2.85TA3T
GM6603-2.85TA3R
Output Voltage
Adj
Adj
Adj
Adj
Adj
1.5
1.5
1.5
1.8
1.8
1.8
1.8
1.8
2.5
2.5
2.5
2.85
2.85
2.85
3.0
3.0
3.0
3.0
3.0
Package
TO-263-2
TO-263-2
TO-252
TO-252
TO-220
TO-263-2
TO-263-2
TO-220
TO-263-2
TO-263-2
TO-252
TO-252
TO-220
TO-263-2
TO-263-2
TO-220
TO-263-2
TO-263-2
TO-220
TO-263-2
TO-263-2
TO-252
TO-252
TO-220
Shipping
50 Units/ Tube
800 Units / Tape &Reel
80 Units / Tube
2,500 Units / Tape & Reel
50 Units / Tube
50 Units/ Tube
800 Units / Tape &Reel
50 Units / Tube
50 Units/ Tube
800 Units / Tape &Reel
80 Units / Tube
2,500 Units / Tape & Reel
50 Units / Tube
50 Units/ Tube
800 Units / Tape &Reel
50 Units / Tube
50 Units/ Tube
800 Units / Tape &Reel
50 Units / Tube
50 Units/ Tube
800 Units / Tape &Reel
80 Units / Tube
2,500 Units / Tape & Reel
50 Units / Tube
GM6603
2
GM6603-2.85TB3T
GM6603-3.0TA3T
GM6603-3.0TA3R
GM6603-3.0TC3T
GM6603-3.0TC3R
GM6603-3.0TB3T
* For detail Ordering Number identification, please see last page.
GM6603
ORDERING INFORMATION
(Continued)
Ordering Number
GM6603-3.3TA3T
GM6603-3.3TA3R
GM6603-3.3TC3T
GM6603-3.3TC3R
GM6603-3.3TB3T
GM6603-5.0TA3T
GM6603-5.0TA3R
GM6603-5.0TC3T
GM6603-5.0TC3R
GM6603-5.0TB3T
Output Voltage
3.3
3.3
3.3
3.3
3.3
5.0
5.0
5.0
5.0
5.0
Package
TO-263-2
TO-263-2
TO-252
TO-252
TO-220
TO-263-2
TO-263-2
TO-252
TO-252
TO-220
Shipping
50 Units/ Tube
800 Units / Tape &Reel
80 Units / Tube
2,500 Units / Tape & Reel
50 Units / Tube
50 Units/ Tube
800 Units / Tape &Reel
80 Units / Tube
2,500 Units / Tape & Reel
50 Units / Tube
* For detail Ordering Number identification, please see last page.
GM6603
3
GM6603
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Power Dissipation
Input Voltage
Operating Junction Temperature Range
Control Section
Power Transistor
Lead Temperature(Soldering, 10sec)
SYMBOL
P
D
V
IN
T
J
T
LEAD
T
STG
ESD
VALUE
Internally limited
7.0
UNIT
W
V
0 to 125
0 to 150
300
-65 to + 150
2.0
°C
°C
°C
KV
Storage Temperature Range
ESD Damage Threshold
BLOCK DIAGRAM
(Adjustable Version)
V
IN
Output
Current
Limit
V
OUT
Thermal
Shutdown
Bandgap
Reference
-
+
Error
Amplifier
ADJ
(Fixed Version)
V
IN
Output
Current
Limit
V
OUT
GM6603
Thermal
Shutdown
Bandgap
Reference
-
+
Error
Amplifier
GND
4
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