GM6605-1.8TB3R [GAMMA]
5.0A LOW DROPOUT PRECISION LINEAR REGULATORS; 5.0A低压差精密线性稳压器
| 型号： | GM6605-1.8TB3R |
| 厂家： | 
GAMMA MICROELECTRONICS INC. |
| 描述： | 5.0A LOW DROPOUT PRECISION LINEAR REGULATORS |
| 文件： | 总10页 (文件大小：290K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Features
Description
Adjustable or Fixed Output
GM6605 series of positive adjustable and fixed regulators
is designed to provide 5A output with low dropout voltage
performance. On-chip trimming adjusts the reference volt-
age with an accuracy of ±1% for adjustable, and ±2% for
fixed voltage versions. To work in post regulators or micro-
processor power supplies, which where low voltage opera-
tion and fast transient response are required. Device in-
cludes over-current protection and thermal shutdown pro-
tection as well.
Output Current of 5.0A
Dropout Voltage (typical) 1.15V @ 5.0A
Typical Line Regulation 0.04%
Typical Load Regulation 0.08%
Fast Transient Response
Current Limit Protection
Thermal Shutdown Protection
GM6605 is available in TO-220 and surface-mount TO-263
packages.
Application
Medical Equipment
Printer Supplies
Motherboards
Microprocessor Supply
Post Regulators for Switching Supplies
Telecommunication Systems
TYPICAL APPLICATION CIRCUITS
V
OUT
V
IN
V
IN
V
OUT
GM6605-3.3
GM6605-Adj
3.3V@3.0A
3.3V@3.0A
5.0V
5.0V
124W
1.0%
ADJ
GND
22µF
5.0V
10µF
5.0V
0.1µF
5.0V
22µF
5.0V
10µF
5.0V
200W
1.0%
(Fixed Version)
(Adjustable Version)
www.gammamicro.com
1
MARKING INFORMATION & PIN CONFIGURATIONS (Top View)
2
TO-252 (DPAK)
TO-220
TO-263-2 (D PAK)
GM6605
VVAYWW
GM6605
VVAYWW
GM6605
VVAYWW
V
IN
OUT
GND*
V
V
IN
V
OUT
V
IN
OUT
GND*
GND*
V
V V = Output Voltage (50 = 5.0V, A =Ad )
j
On fixed versions Pin 1 = GND,
A
= Assembly Location
= Year
on adjustable versions Pin 1 = ADJ
Y
Tab = V
OUT
W W = Weekly
ORDERING INFORMATION
Ordering Number
Output Voltage
Package
Shipping
Adj
Adj
Adj
1.8
1.8
1.8
2.5
2.5
2.5
3.3
3.3
3.3
3.3
3.3
5.0
5.0
5.0
GM6605-ATA3T
TO-263-2
TO-263-2
TO-220
50 Units / Tube
800 Units / Tape & Reel
GM6605-ATA3R
GM6605-ATB3T
GM6605-1.8TA3T
GM6605-1.8TA3R
GM6605-1.8TB3T
GM6605-2.5TA3T
GM6605-2.5TA3R
GM6605-2.5TB3T
GM6605-3.3TA3T
GM6605-3.3TA3R
GM6605-3.3TB3T
GM6605-3.3TC3T
GM6605-3.3TC3R
GM6605-5.0TA3T
GM6605-5.0TA3R
GM6605-5.0TB3T
50 Units / Tube
50 Units / Tube
TO-263-2
TO-263-2
TO-220
800 Units / Tape & Reel
50 Units / Tube
50 Units / Tube
TO-263-2
TO-263-2
TO-220
800 Units / Tape & Reel
50 Units / Tube
50 Units / Tube
TO-263-2
TO-263-2
TO-220
800 Units / Tape & Reel
50 Units / Tube
80 Units / Tube
2,500 Units / Tape & Reel
50 Units / Tube
TO-252
TO-252
TO-263-2
TO-263-2
TO-220
800 Units / Tape & Reel
50 Units / Tube
* For detail Ordering Number identification, please see last page.
2
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VALUE
UNIT
Power Dissipation
P
D
Internally limited
W
Input Voltage
V
15
V
IN
Junction Temperature
T
J
+150
°C
Lead Temperature(Soldering, 10sec)
T
LEAD
300
°C
T
J
0 to + 125
°C
Operating Junction Temperature Range
Storage Temperature Range
T
STG
-65 to + 150
°C
BLOCK DIAGRAM
(Fixed Version)
V
OUT
V
IN
Output
Current
Limit
Thermal
Error
Shutdown
Amplifier
-
+
Bandgap
Reference
GND
(Adjustable Version)
V
OUT
V
IN
Output
Current
Limit
Thermal
Error
Shutdown
Amplifier
-
+
Bandgap
ADJ
Reference
3
ELECTRICAL CHARACTERISTICS
(Typicals and limits appearing in normal type apply for T = 25°C)
J
Symbol
Typ
Parameter
Condition
Min
Max Unit
I
=10mA, V -V
=1.5V
1.238 1.250 1.262
1.230 1.250 1.270
1.782 1.800 1.818
1.764 1.800 1.836
2.475 2.500 2.525
2.460 2.500 2.540
3.267 3.300 3.333
3.247 3.300 3.353
4.950 5.000 5.050
4.920 5.000 5.080
OUT
IN OUT
V
Reference Voltage
GM6605-Adj
GM6605-1.8
GM6605-2.5
GM6605-3.3
GM6605-5.0
V
V
V
V
V
REF
10mA
I
5A, 3.3V
V
IN
7V
OUT
I
=10mA, V =3.3V
IN
OUT
10mA
I
5A, 3.3V
V
IN
7V
OUT
I
=10mA, V =4V
IN
OUT
10mA
I
5A, 4V
V
IN
7V
OUT
V
Output Voltage
Line Regulation
Load Regulation
O
I
=10mA, V =4.8V
IN
OUT
10mA
I
5A, 4.8V
V
IN
7V
OUT
I
=10mA, V =6.5V
IN
OUT
10mA
I
5A, 6.5V
V
IN
7V
OUT
I
=10mA,
0.04
0.04
0.04
0.04
0.04
0.08
0.08
0.08
0.08
0.08
1.15
6.8
0.20
0.20
0.20
0.20
0.20
0.40
0.40
0.40
0.40
0.40
1.3
OUT
OUT
GM6605-Adj
GM6605-1.8
GM6605-2.5
GM6605-3.3
GM6605-5.0
I
=10mA, 3.3V
V
IN
7V
REG
%
I
I
=10mA, 4V
OUT
V
7V
LINE
IN
=10mA, 4.8V
OUT
V
7V
7V
IN
I
=10mA, 6.5V
OUT
V
IN
V
V
V
V
V
I
-V =1.5V, 10mA
IN OUT
I
5A
GM6605-Adj
GM6605-1.8
GM6605-2.5
GM6605-3.3
GM6605-5.0
O
=3.8V, 10mA
=4.5V, 10mA
=5.3V, 10mA
=7V, 10mA
=5A
I
I
I
5A
5A
5A
IN
IN
IN
IN
O
O
O
REG
%
LOAD
I
5A
O
V
Dropout Voltage
Current Limit
V
A
D
OUT
I
V
-V =3V
IN OUT
5.5
CL
I
V
=5V
IN
Minimum Load Current
GM6605-Adj
5
10
10
mA
O MIN
V
=3.3V, 10mA
=4.0V, 10mA
=4.8V, 10mA
=6.5V, 10mA
I
I
I
I
5A
5A
5A
5A
V
5
IN
O
O
O
O
GM6605-1.8
GM6605-2.5
GM6605-3.3
GM6605-5.0
GM6605-Adj
V
V
V
I
5
10
IN
IN
IN
I
Q
Quiescent Current
mA
5
10
5
10
I
=10mA, 2.75V
7V
Adjust Pin Current
Temperature Coefficient
Ripple Rejection
50
120
µA
%/°C
dB
ADJ
OUT
IN
V
-V
IN OUT
=1.5V, I
=10mA
OUT
0.005
80
R
A
V
-V
IN OUT
=1.5V, I
=5A
OUT
60
4
APPLICATION INFORMATION
Protection Diodes
GM6605 series linear regulators provide fixed and ad-
justable output voltages at currents up to 5.0A. These
regulators are protected against over-current condi-
tions and include thermal shutdown protection. The
GM6605 has a composite PNP-NPN output transistor
and require an output capacitor for stability.
When large external capacitors are used with most
linear regulator, it is wise to add protection diodes. If
the input voltage of the regulator is shorted, the out-
put capacitor will discharge into the output of the reg-
ulator. The discharge current depends on the value
of capacitor, output voltage, and rate at which V
A detailed procedure for selecting this capacitor is as
followed.
IN
drops.
(a),(b)
Figure 1
Protection Diode Scheme for
Large Output Capacitors
Stability Considerations
(a) Fixed Version
The output compensation capacitor helps to determine
three main characteristics of a linear regulator's perfor-
mance: start-up delay, load transient response, and
loop stability. The capacitor value and type is based on
cost, availability, size, and temperature constraints. A
tantalum or aluminum electrolytic capacitor is pre-
ferred, as a film or ceramic capacitor with almost zero
ESR can cause instability. An aluminum electrolytic ca-
pacitor is the least expensive type. But when the circuit
operates at low temperatures, both the value and ESR
of the capacitor will vary widely. For optimum perfor-
mance over the full operating temperature range, a tan-
talum capacitor is the best. A 22µF tantalum capacitor
will work fine in most applications. But with high current
regulators, such as GM6605 higher capacitance values
will improve the transient response and stability. Most
applications for Gm6605 involve large changes in load
current, so the output capacitor must supply instanta-
neous load current. The ESR of the output capacitor
causes an immediate drop in output voltage given by:
IN4002
V
V
V
IN
IN
V
OUT
OUT
GM6605-3.3
GND
C2
C1
(b) Adjustable Version
IN4002
V
V
IN
IN
V
V
OUT
OUT
GM6605-Adj
C2
ADJ
R1
C1
C
ADJ
R2
DV = DI x ESD
In GM6605 linear regulators, the discharge path is
through a large junction, and protection diodes are
normally not needed. However, if the regulator is
used with large output capacitance values and the in-
put voltage is instantaneously shorted to ground,
damage can occur. In this case, a diode connected
as shown above in Figure 1.
In microprocessor applications an output capacitor net-
work of several tantalum and ceramic capacitors in par-
allel is commonly used. This reduces overall ESR and
minimizes the instantaneous output voltage drop under
transient load conditions. The output capacitor network
should be placed as close to the load as possible for
the best results.
5
The thermal characteristics of an IC depend on four
factors:
Output Voltage Sensing
1. Maximum Ambient Temperature T (°C)
A
GM6605 series is three terminal regulator, so they can-
not provide true remote load sensing. Load regulation
is limited by the resistance of the conductors connect-
ing the regulator to the load. For best results, Gm6605
should be connected as shown in Figure 2.
2. Power Dissipation P (Watts)
D
3. Maximum Junction Temperature T (°C)
J
4. Thermal Resistance Junction to ambient R
JA
Q
(°C/W)
These relationship of these four factors is expressed
by equation (1):
Conductor
Parasitic
R
C
V
V
IN
V
IN
OUT
Resistance
T = T + P X R
J A D
........(1)
QJA
GM6605-3.3
Maximum ambient temperature and power dissipa-
tion are determined by the design while the maximum
junction temperature and thermal resistance depend
on the manufacturer and the package type.
R
LOAD
GND
(a) Fixed Version
The maximum power dissipation for a regulator is ex-
pressed by equation (2):
Conductor
Parasitic
V
R
V
V
IN
C
OUT
IN
Resistance
P
= { V
- V
IN(max)
} I
OUT(min) OUT(max)
+ V
I ........(2)
IN(max) Q
D(max)
GM6605-A
R1
A
DJ
R
where:
LOAD
V
is the maximum input voltage,
IN(max)
R2
V
is the minimum output voltage,
OUT(min)
(b) Adjustable Version
I
is the maximum output current
OUT(max)
I
is the maximum quiescent current at I
.
Q
OUT(max)
(a),(b)
Figure 2
Conductor Parasitic Resistance Effects are
A heat sink effectively increases the surface area of
the package to improve the flow of heat away from
the IC into the air. Each material in the heat flow path
between the IC and the environment has a thermal re-
sistance. Like series electrical resistances, these re-
Minimized by this Grounding Scheme For Fixed
and Adjustable Output Regulators
Calculating Power Dissipation and Heat
Sink Requirements
sistance are summed to determine R , the total
Q
JA
GM6605 series precision linear regulators include ther-
mal shutdown and current limit circuitry to protect the
devices. However, high power regulators normally oper-
ate at high junction temperatures so it is important to
calculate the power dissipation and junction tempera-
tures accurately to be sure that you use and adequate
thermal resistance between the junction and the air.
This is expressed by equation (3):
R
QJA
= R + R + R
QJC QCS
........(3)
QSA
Where all of the following are in °C/W:
R
R
R
is thermal resistance of junction to case,
is thermal resistance of case to heat sink,
is thermal resistance of heat sink to ambient air
Q
JC
Q
CS
Q
SA
heat sink. The case is connected to V
on GM6605.
OUT
so electrical isolation may be required for some appli-
cations. Thermal compound should always be used
with high current regulators like GM6605.
The value for R
is calculated using equation (3)
Q
JA
and the result can be substituted in equation (1). The
value for R is 3.5°C/W for a given package type
Q
JC
based on an average die size. For a high current reg-
ulator such as GM6605, the majority of the heat is
generated in the power transistor section.
6
Typical Performance Characteristics
+0.3
+0.2
+0.1
0
1.20
1.15
T
= 0°C
CASE
1.10
1.05
1.00
0.95
0.90
0.85
0.80
0.75
T
= 25°C
CASE
-0.1
-0.2
-0.3
T
= 125°C
CASE
0
0.30 0.60 0.90 1.20 1.50 1.80 2.10 2.40 2.70 300
Qutput Current(A)
0
30
60
90
120
T °C
J
Figure 4. Bandgap Reference Voltage Deviation
vs. Temperature
Figure 3. Dropout Voltage vs. Output Current
90
80
70
60
50
40
30
20
10
0.65
0.60
0.55
0.50
0.45
0.40
T
= 0°C
CASE
T
= 25°C
CASE
T
= 125°C
CASE
1
2
3
4
5
6
1
2
3
4
5
6
7
8
10
10
10
10
10
10
V
- V
OUT(V)
Frequency(Hz)
IN
Figure 5. Ripple Rejection vs. Frequency
Figure 6. Minimum Load Current vs.
- V
V
IN
OUT(V)
7
TO-252 PACKAGE OUTLINE DIMENSIONS
6.50 ± 0.05
2.30 ± 0.05
Pad Layout
5.340 ± 0.05
0.508 ± 0.0127
29° ± 0.5°
REF 0.6
0.244
6.20
7°
0.118
3.0
1.0 ± 0.05
6.10 ± 0.05
0.070 ± 0.05
9.900
7.20 ± 0.05
0.243
6.172
0.228
5.80
7°
0.75 ± 0.10
2.70 ± 0.10
1.525 ± 0.10
7°
0.75 ± 0.10
0.89 ± 0.05
0.81 ± 0.038
0.063
R 0.25 ± 0.13
0.101
2.58
1.6
Inches
mm
(
)
Unit: mm
R0.15 max
2°
TO-263-2 PACKAGE OUTLINE DIMENSIONS
9.90 ± 0.20
4.50 ± 0.20
+0.1
1.30
15°
-0.05
0.40
1.20
Pad Layout
3°
1.50 DP0.20
0.63
17.02
9.20 ± 0.20
0.33
8.38
0.12
3.05
15.3 ± 0.20
0.10 ± 0.01
3°
R0.30
3°
1.4 ± 0.20
2.40 ± 0.20
2.00 ± 0.10
0.42
0.24
4.90 ± 0.20
10.66
6.096
2.54 ± 0.10
0.75
+0.1
0.90 ± 0.10
R0.30
0.50
-0.05
1.27 ± 0.10
0.04
1.016
2.54 TYP
10.0 ± 0.20
(2.54 ± 0.20)
7.0
4.0
0.40
0.90
Inches
(
)
mm
3°
3°
R 0.3
R 0.45
7.2
9.20 ± 0.20
10.00 ± 0.20
4.90 ± 0.20
Unit: mm
8
TO-220 PACKAGE OUTLINE DIMENSIONS
4.50 ± 0.20
9.90 ± 0.20
8.0
7.0
3.60 ± 0.20
8.70
+0.1
2.80 ± 0.10
1.30
-0.05
1.30 ± 0.10
1.70
3.70 ± 0.20
1.50 DP0.20
3°
0.9
7.0
4.60
8.40
3°
3°
1.46
1.00
45°
3.00
3-R0.2
1.27 ± 0.10
+0.1
0.80 ± 0.10
0.50
-0.05
1.52 ± 0.10
2.54 TYP
2.40 ± 0.20
(2.54 ± 0.20)
3°
3°
2 - R 0.3
Unit: mm
10.00 ± 0.20
ORDERING NUMBER
GM 6605 1.8 TB3 T
Gamma Micro.
Shipping
T: Tube
R: Tape & Reel
Circuit Type
Package
TA3: TO-263-2
TB3: TO-220
TC3: TO-252
Output Voltage
A: Adj, 1.5: 1.5V
1.8: 1.8V, 2.5: 2.5V
3.3: 3.3V, 5.0: 5.0V
9
10
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