AMC DOC. #: AMC7587_D (LF)
March 2004
A
DD MICROTECH CORP.
DESCRIPTION
AMC7587
1.5A L
OW
D
ROPOUT
R
EGULATOR
FEATURES
The AMC7587 is a high performance low dropout regulator
rated for 1.5A 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 AMC7587 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.
Input-Output differential of typical
1.1V at 1.5A and low quiescent
current
Output current is excess of 1.5A
Fast transient response
Reverse battery protection
Short circuit protection
Internal thermal overload protection
Available in 3L plastic TO-220, surface
mount 3L TO-263/252, and SOT223
packages
Pin assignment identical to EZ1585B
and LT1585A series.
APPLICATIONS
PACKAGE PIN OUT
V
IN
V
OUT
ADJ/GND
V
IN
V
OUT
ADJ/GND
Pentium
Processor Supplies
PowerPC
TM
Supplies
Computer Add-On Cards
Other Applications Requiring Low
Dropout Voltage Over Rated Current.
AMC7587-1.8 – 1.8V Fixed
AMC7587-2.5 – 2.5V Fixed
AMC7587-3.3 – 3.3V Fixed
AMC7587-5.0 – 5.0V Fixed
AMC7587-ADJ – Adjustable
3-Pin Plastic TO-220 (T)
(Top View)
3-Pin Plastic TO-252(SJ)
Surface Mount
(Top View)
V
IN
V
OUT
ADJ/GND
V
IN
V
OUT
ADJ/GND
3-Pin Plastic TO-263(ST)
Surface Mount
(Top View)
3-Pin Plastic SOT-223(SK)
Surface Mount
(Top View)
ORDER INFORMATION
T
A
(
O
C)
T
TO-220
3-pin
ST
TO-263
3-pin
SOT-223
TO-252
SK
3-pin
AMC7587-X.XSK
SJ
3-pin
AMC7587-X.XSJ
AMC7587-X.XT
0 to 70
AMC7587-X.XTF(Lead Free)
AMC7587-ADJT
AMC7587-X.XST
AMC7587-X.XSTF(Lead Free) AMC7587-X.XSKF(Lead Free) AMC7587-X.XSJF(Lead Free)
AMC7587-ADJST
AMC7587-ADJSK
AMC7587-ADJSJ
AMC7587-ADJTF(Lead Free) AMC7587-ADJSTF(Lead Free) AMC7587-ADJSKF(Lead Free) AMC7587-ADJSJF(Lead Free)
Note:
1.All surface-mount packages are available in Tape & Reel. Append the letter “T” to part number (i.e.,
AMC7587-X.XSTT, AMC7587-X.XSKT, AMC7587-X.XSJT).
2.The letter “F” is marked for Lead Free process .
Copyright
2002, 2003, 2004 ADD Microtech Corp.
1
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AMC DOC. #: AMC7587_D (LF)
March
2004
AMC7587
1.5A L
OW
D
ROPOUT
R
EGULATOR
TYPICAL APPLICATION
V
IN
≥
4V
AMC7587-
X.X
V
OUT
1.8V/2.5V/3.3V/5V
C2
22µF
C1
10µF
AMC7587-X.X application schematic
V
IN
≥
2.7V
AMC7587 -
ADJ
ADJ
*C1
10µF
R1
1%
R2
1%
V
OUT
**C2
22µF
V
OUT
= V
REF
(1+(R2/R1)) + I
ADJ
R2
* REQUIRED IF REGULATOR IS
LOCATED FAR FROM POWER
SUPPLY FILTER
** DESIGN C2 AS CLOSE TO V
OUT
PIN
AS POSSIBLE
AMC7587-ADJ application schematic
Copyright
2002, 2003, 2004 ADD Microtech Corp.
2
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AMC DOC. #: AMC7587_D (LF)
March
2004
AMC7587
1.5A L
OW
D
ROPOUT
R
EGULATOR
ABSOLUTE MAXIMUM RATINGS
(Note 1)
10.5V
150
O
C
-65
O
C to 150
O
C
300
O
C
Input Voltage (V
IN
)
Operating Junction temperature
Storage Temperature Range
Lead temperature (Soldering, 10 seconds)
Note 1:
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
ST/ST3F
SJ
SJF
SK
θ
JA
O
( C /W )
45
45
45
45
80
80
136
Derating factor ( mW/
O
C )
T
A
≥
25
O
C
22.2
22.2
22.2
22.2
12.5
12.5
7.35
T
A
≤
25
O
C
Power rating(mW)
2775
2775
2775
2775
1562
1562
919
T
A
=70
O
C
Power rating(mW)
1776
1776
1776
1776
1000
1000
588
T
A
= 85
O
C
Power rating (mW)
1443
1443
1443
1443
812
812
478
478
SKF
136
7.35
919
588
Note :
1.
θ
JA
:
Thermal Resistance-Junction to Ambient, D
F
: Derating factor, Po: Power consumption.
Junction Temperature Calculation: T
J
= T
A
+ (P
D
× θ
JA
), P
o
= D
F
×
( T
J
- T
A
)
The
θ
JA
numbers are guidelines for the thermal performance of the device/PC-board system.
All of the above assume no ambient airflow.
2.
θ
JT:
Thermal Resistance-Junction to Ambient, T
C
: case(Tab) temperature, T
J
= T
C
+ (P
D
× θ
JT
)
For T and ST/ST3 packages,
θ
JT
= 3.0
O
C / W.
For SJ package,
θ
JT
= 7.0
O
C / W.
For SK package,
θ
JT
= 15.0
O
C / W
3. If power consumption is over above rating, adequate heat sink is required to dissipate heat.
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol Recommended Operating Conditions
Min.
Typ.
Max.
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
V
IN
I
O
2.7
0.010
1
10
0
70
10
1.5
Units
V
A
µF
µF
O
C
Copyright
2002, 2003, 2004 ADD Microtech Corp.
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AMC DOC. #: AMC7587_D (LF)
March
2004
BLOCK DIAGRAM
AMC7587
1.5A L
OW
D
ROPOUT
R
EGULATOR
V
IN
V
OUT
THERMAL
LIMIT
1.25V
V
REF
GND
AMC7587-X.X circuit schematic
V
IN
1.25V
V
REF
THERMAL
LIMIT
V
OUT
ADJ
AMC7587-ADJ circuit schematic
Copyright
2002, 2003, 2004 ADD Microtech Corp.
4
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AMC DOC. #: AMC7587_D (LF)
March
2004
AMC7587
1.5A L
OW
D
ROPOUT
R
EGULATOR
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, V
IN
= V
OUT
+ 2V, 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
AMC7587-1.8
Output Voltage
AMC7587-2.5
AMC7587-3.3
AMC7587-5.0
AMC7587-1.8
AMC7587-2.5
Output Voltage
AMC7587-3.3
AMC7587-5.0
Reference
Voltage
(Note 1)
AMC7587-ADJ
V
REF
V
OI
V
OL
V
I
Q
I
ADJ
I
CL
Imin
R
R
(V
IN
- V
OUT
) = 2V
V
RIPPLE
= 1V
PP
, I
O
= 100mA, fo=120
HZ
1.5
60
I
O
= 10mA to 1.5A, (Note 1)
(1.5V + V
OUT
)
≤
V
IN
≤
10V
I
O
= 10mA to 1.5A
(Note 3)
I
O
= 10mA
I
O
= 1.5A
V
OUT
I
O
= 10mA to 1.5A
V
OUT
Symbol
Test Conditions
T
A
= 25
O
C
T
A
= 25 C
T
A
= 25
O
C
T
A
= 25
O
C
O
AMC7587
Min.
Typ.
Max.
1.782
2.475
3.267
4.950
1.771
2.460
3.247
4.920
1.238
1.230
1.800
2.500
3.300
5.000
1.800
2.500
3.300
5.000
1.250
1.250
0.04
0.08
1.00
1.15
8
50
3
5
80
1.818
2.525
3.333
5.050
1.829
2.540
3.353
5.080
1.262
1.270
0.2
0.3
1.15
1.30
13
120
10
Units
V
V
V
%
%
V
mA
µA
A
mA
dB
Line Regulation (Note 2)
Load regulation (Note 2)
Dropout Voltage
Quiescent Current
( for AMC7587-X.X)
Adjust Pin Current
( for AMC7587-ADJ)
Current Limit
Minimum Load Current (Note 4)
Ripple Rejection (Note 5)
V
IN
≤
10V, I
O
= 10mA to 1.5A
Note 1 Output voltage is set to be 2.5V.
Note 2: 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.
Note 3: The specifications represent the minimum input/output voltage required to maintain 1% regulation.
Note 4: 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.
Note 5: These parameters, although guaranteed, are not tested in production prior to shipment
Copyright
2002, 2003, 2004 ADD Microtech Corp.
5
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