AMC7585
www.addmtek.com
DESCRIPTION
The AMC7585 is a high performance low dropout
regulator rated for 5A output current with fixed
1.8V/2.5V/3.3V/5.0V and adjustable output. It is designed
for use in applications requiring low dropout characteristics
over the rated current range.
On chip trimming adjusts the reference voltage to 1%.
These features are ideal for low voltage microprocessor
applications requiring a regulated 2.5V to 3.6V power
supply.
In addition, the AMC7585 provides the device
protections including over current and thermal shutdown.
Also, reverse battery protection scheme limits the reverse
current when the input voltage falls below the output.
APPLICATIONS
Pentium® Processor Supplies
PowerPCTM Supplies
Computer Add-On Cards
Other Applications Requiring Low
Dropout Voltage Over Rated Current
VOLTAGE OPTIONS
AMC7585-1.8 – 1.8V Fixed
AMC7585-2.5 – 2.5V Fixed
AMC7585-3.3 – 3.3V Fixed
AMC7585-5.0 – 5.0V Fixed
AMC7585-ADJ – Adjustable
5A L
OW
D
ROP
O
UT
R
EGULATOR
FEATURES
Output current is excess of 5A
Fast transient response
Reverse battery protection
Short circuit protection
Internal thermal overload protection
Available in 3L plastic TO-220 and surface
mount 3L TO-263/252 packages
Pin assignment identical to EZ1585B and
LT1585A series.
PACKAGE PIN OUT
3.V
IN
2.V
OUT
1.ADJ/GND
3-Pin Plastic TO-220
(Top View)
(Top View)
3.V
IN
2.V
OUT
1.ADJ/GND
3-Pin Plastic TO-252
Surface Mount
3.V
IN
2.V
OUT
1.ADJ/GND
3.V
IN
2.V
OUT
1.ADJ/GND
3-Pin Plastic TO-263 (ST)
Surface Mount
(Top View)
3-Pin Plastic TO-263-3 (ST3)
Surface Mount
(Top View)
ORDER INFORMATION
T
A
(
O
C)
0 to 70
0 to 70
0 to 70
0 to 70
T
TO-220
3-pin
ST
TO-263
3-pin
ST3
3-pin
-
-
TO-263-3
SJ
TO-252
3-pin
AMC7585-X.XT
AMC7585-X.XST
AMC7585-X.XSJ
AMC7585-X.XSJF(Lead Free)
AMC7585-ADJSJ
AMC7585-X.XTF(Lead Free) AMC7585-X.XSTF(Lead Free)
AMC7585-ADJT
AMC7585-ADJTF(Lead Free)
AMC7585-ADJST
AMC7585-ADJSTF(Lead Free)
AMC7585-ADJST3
AMC7585-ADJST3F(Lead Free) AMC7585-ADJSJF(Lead Free)
Note: 1. All surface-mount packages are available in Tape & Reel. Append the letter “T” to part number (i.e., AMC7585-X.XSTT,
AMC7585-X.XST3T, AMC7585-X.XSJT ).
2. The letter ”F” is marked for Lead Free process.
Copyright
©
2008 ADDtek Corp.
1
DD041_I -- FEBRUARY 2008
AMC7585
TYPICAL APPLICATION
V
IN
AMC7585-X.X
V
OUT
1.8V/2.5V/3.3V/5V
C1
10µF
C2
22µF
AMC7585-X.X Application Schematic
V
IN
AMC7585
- ADJ
ADJ
*C1
10µF
R2
1%
R1
1%
V
OUT
** C2
22µF
* REQUIRED IF REGULATOR IS LOCATED
FAR FROM POWER SUPPLY FILTER
V
OUT
= V
REF
(1+(R2/R1)) + I
ADJ
R2
** DESIGN C2 AS CLOSE TO V
OUT
PIN AS
POSSIBLE
AMC7585-ADJ Application Schematic
Copyright
©
2008 ADDtek Corp.
2
DD041_ I -- FEBRUARY 2008
AMC7585
ABSOLUTE MAXIMUM RATINGS
Input Voltage (V
IN
)
Operating Junction temperature
Storage Temperature Range
Lead temperature (Soldering, 10 seconds)
(Note)
7V
150
O
C
-65
O
C to 150
O
C
300
O
C
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative
out of the specified terminal.
POWER DISSIPATION TABLE
Package
T
TF
ST/ST3
STF/ST3F
SJ
SJF
θ
JT
(°C /W )
6
6
6
6
7
7
θ
JA
(°C /W )
45
45
45
45
80
80
Derating factor
T
A
=70 °C
T
A
= 85 °C
T
A
≤
25 °C
( mW/ °C )
Power rating (mW) Power rating (mW) Power rating (mW)
T
A
≥
25
O
C
22.2
22.2
22.2
22.2
12.5
12.5
2775
2775
2775
2775
1562
1562
1776
1776
1776
1776
1000
1000
1443
1443
1443
1443
812
812
Note: T
J
= T
A
+ (P
D
× θ
JA
)
P
D
: Power dissipation.
θ
JA
: Thermal resistance from Junction to Ambient.
For T and ST/ST3 packages,
θ
JT
= 6.0 °C / W.
For SJ package,
θ
JT
= 7.0°C /W.
T
J
= T
TAB
+ (P
D
× θ
JT
)
T
TAB
: Tab temperature.
θ
JT:
Thermal resistance from junction to tab of the package.
1. The
θ
JA
numbers are guidelines for the thermal performance of the device/PC-board system.
2. All of the above assume no ambient airflow.
3. If power consumption is over above rating, adequate heat sink is required to dissipate heat.
RECOMMENDED OPERATING CONDITIONS
Parameter
Input Voltage
Load Current (with adequate heatsinking)
Input Capacitor (V
IN
to GND)
Output Capacitor with ESR of 10Ω max., (V
OUT
to GND)
Operating Ambient Temperature Range
Operating junction temperature
T
J
Symbol
V
IN
I
O
Recommended Operating Conditions
Min.
2.75
0.010
1
10
0
70
125
Typ.
Max.
7
5
V
A
µF
µF
O
C
O
Units
C
Copyright
©
2008 ADDtek Corp.
3
DD041_ I -- FEBRUARY 2008
AMC7585
BLOCK DIAGRAM
V
IN
V
OUT
THERMAL
LIMIT
1.25V
V
REF
GND
AMC7585-X.X Circuit Schematic
V
IN
1.25V
V
REF
THERMAL
LIMIT
V
OUT
ADJ
AMC7585-ADJ Circuit Schematic
Copyright
©
2008 ADDtek Corp.
4
DD041_ I -- FEBRUARY 2008
AMC7585
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, V
IN
= V
OUT
+ 1.5V, I
O
= 10mA. These specifications apply operating ambient temperature
range, and are for DC characteristics only. (Low duty cycle pulse testing techniques are used which maintains
junction and case temperatures equal to the ambient temperature.)
Parameter
AMC7585-1.8
Output Voltage
AMC7585-2.5
AMC7585-3.3
AMC7585-5.0
AMC7585-1.8
AMC7585-2.5
Output Voltage
AMC7585-3.3
AMC7585-5.0
Reference
Voltage
(Note 1)
Symbol
Test Conditions
AMC7585
Min.
Typ.
Max.
1.782
1.800
2.500
3.300
5.000
1.800
2.500
3.300
5.000
1.250
1.250
0.04
0.2
1.30
8
50
1.818
2.525
3.333
5.050
1.836
2.550
3.366
5.100
1.262
1.270
0.2
0.4
1.50
13
120
2.475
3.267
4.950
1.764
Units
V
OUT
I
O
= 10mA, T
A
= 25
O
C
V
V
OUT
V
IN
= V
OUT
+ 1.5V to 10V,
I
O
= 0mA to 5A
2.450
3.234
4.900
1.238
1.230
V
AMC7585-ADJ V
REF
V
%
%
V
mA
µA
A
I
O
= 10mA to 5A, (Note 1)
Line Regulation
(Note 2)
Load Regulation
(Note 2)
Dropout Voltage
Quiescent Current
( for AMC7585-X.X)
Adjust Pin Current
( for AMC7585-ADJ)
Current Limit
Minimum Load Current
(Note 4)
Ripple Rejection
(Note 5)
Note 1
Note 2:
Note 3:
Note 4:
Note 5:
Output voltage is set to be 2.5V.
ΔV
OI
(1.5V + V
OUT
)
≤
V
IN
≤
7V
ΔV
OL
ΔV
I
Q
I
ADJ
I
CL
Imin
R
R
V
RIPPLE
= 1V
PP
, I
O
= 100mA,
f
O
=120Hz
60
(V
IN
- V
OUT
)=2V
5.1
I
O
=10mA to 5A
I
O
= 5A
(Note 3)
V
IN
≤
7V, I
O
= 10mA to 3A
6.8
5
80
10
mA
dB
Line and load regulations are guaranteed up to maximum power dissipation determined by input/output differential and the output current.
However, the maximum power will not be available over the full input/output voltage range.
The specifications represent the minimum input/output voltage required to maintain 1% regulation.
The minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used to set
the output voltage is selected to meet the minimum load current requirement.
These parameters, although guaranteed, are not tested in production prior to shipment
Copyright
©
2008 ADDtek Corp.
5
DD041_ I -- FEBRUARY 2008
京公网安备 11010802033920号
EEWORLD
