LMS1585AEP/LMS1587EP
Enhanced Plastic 5A and 3A Low Dropout Fast
Response Regulators
General Description
The LMS1585AEP and LMS1587EP are low dropout posi-
tive regulators with output load current of 5A and 3A respec-
tively. Their low dropout voltage (1.2V) and fast transient
response make them an excellent solution for low voltage
microprocessor applications.
The LMS1585AEP/87EP are available in adjustable ver-
sions, which can set the output voltage with only two external
resistors. In addition, they are also available in 1.5V and
3.3V fixed voltage versions (Note 12).
The LMS1585AEP/87EP circuits include a zener trimmed
bandgap reference, current limiting and thermal shutdown.
The LMS1585AEP/87EP series are available in TO-220 and
TO-263 packages.
ENHANCED PLASTIC
•Extended Temperature Performance of −40˚C to 125˚C
•Baseline Control - Single Fab & Assembly Site
•Process Change Notification (PCN)
•Qualification & Reliability Data
•Solder (PbSn) Lead Finish is standard
•Enhanced Diminishing Manufacturing Sources (DMS)
Support
Features
nFast transient response
nAvailable in Adjustable, 1.5V, and 3.3V versions
nCurrent limiting and thermal protection
nLine regulation 0.005% (typical)
nLoad regulation 0.05% (typical)
Applications
nLow voltage logic supplies
nSelected Military Applications
nSelected Avionics Applications
Ordering Information
PART NUMBER VID PART NUMBER NS PACKAGE NUMBER (Note 3)
LMS1585AIS33EP V62/04639-01 TS3B
LMS1585AISADJEP V62/04639-02 TS3B
LMS1587ISXADJEP V62/04639-03 TS3B
(Notes 1, 2) TBD TBD
Note 1: For the following (Enhanced Plastic) version, check for availability: LMS1585ACT3.3EP, LMS1585ACTADJEP, LMS1585AIT1.5EP,
LMS1585AIT3.3EP, LMS1585AITADJEP, LMS1585ACS1.5EP, LMS1585ACS3.3EP, LMS1585ACSADJEP, LMS1585AIS1.5EP, LMS1585ACSX33EP,
LMS1585CSXADJEP, LMS1585AISX15EP, LMS1585AISX33EP, LMS1585ASXADJEP, LMS1587CT1.5EP, LMS1587CT3.3EP, LMS1587CTADJEP,
LMS1587IT1.5EP, LMS1587IT3.3EP, LMS1587ITADJEP, LMS1587CS1.5EP, LMS1587CS3.3EP, LMS1587CSADJEP, LMS1587IS1.5EP, LMS1587IS3.3EP,
LMS1587ISADJEP, LMS1587CSX3.3EP, LMS1587CSXADJEP, LMS1587ISX1.5EP, LMS1587ISX3.3EP. Parts listed with an "X" are provided in Tape &
Reel and parts without an "X" are in Rails.
Note 2: FOR ADDITIONAL ORDERING AND PRODUCT INFORMATION, PLEASE VISIT THE ENHANCED PLASTIC WEB SITE AT: www.national.com/
mil
Note 3: Refer to package details under Physical Dimensions
June 2004
LMS1585AEP/LMS1587EP Enhanced Plastic 5A and 3A Low Dropout Fast Response Regulators
© 2004 National Semiconductor Corporation DS200998 www.national.com
Typical Application
20099801
Connection Diagrams
TO-220 TO-263
20099836
Top View
20099835
Top View
Simplified Schematic
20099814
LMS1585AEP/LMS1587EP Enhanced Plastic
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Absolute Maximum Ratings (Note 4)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Input to Output Voltage
(V
IN
to GND) 13V
Power Dissipation (Note 5) Internally Limited
Junction Temperature (T
J
) (Note 5) 150˚C
Storage Temperature Range -65˚C to 150˚C
Lead Temperature 260˚C, 10 sec
ESD Tolerance (Note 6) 2000V
Electrical Characteristics
Typicals and limits appearing in normal type apply for T
J
= 25˚C. Limits appearing in Boldface type apply over the entire junc-
tion temperature range for operation, 0˚C to 125˚C for commercial grade and −40˚C to 125˚C for Enhanced Plastic.
Symbol Parameter Conditions Min
(Note 8)
Typ
(Note 7)
Max
(Note 8) Units
V
REF
Reference Voltage LMS1585A-ADJEP
V
IN
−V
OUT
= 3V, I
OUT
= 10mA
10mA ≤I
OUT
≤5A, 1.5V ≤V
IN
−V
OUT
≤5.75V
1.238
1.225
1.25
1.250
1.262
1.275
V
V
LMS1587-ADJEP
10mA ≤I
OUT
≤3A, 1.5V ≤V
IN
−V
OUT
≤5.75V 1.225 1.250 1.275 V
V
OUT
Output Voltage LMS1585A-1.5EP
I
OUT
= 0mA, V
IN
=5V
0≤I
OUT
≤5A, 3V ≤V
IN
≤7V
1.485
1.470
1.500 1.515
1.530
V
V
LMS1585A-3.3EP
I
OUT
= 0mA, V
IN
=5V
0≤I
OUT
≤5A, 4.75V ≤V
IN
≤7V
3.267
3.235
3.300
3.300
3.333
3.365
V
V
LMS1587-1.5EP
V
IN
= 5V, I
OUT
= 0mA, T
J
= 25˚C
0≤I
OUT
≤3A, 3V ≤V
IN
≤7V
1.485
1.470
1.500
1.500
1.515
1.530
V
V
LMS1587-3.3EP
0≤I
OUT
≤3A, 4.75V ≤V
IN
≤7V 3.235 3.300 3.365 V
∆V
OUT
Line Regulation
(Note 9)
LMS1585AEP/87-ADJEP
I
OUT
= 10mA, 2.75V ≤V
IN
≤7V 0.005 0.2 %
LMS1585AEP/87-3.3EP
I
OUT
= 0mA, 4.75V ≤V
IN
≤7V 0.005 0.2 %
LMS1585AEP/87-1.5EP
I
OUT
= 0mA, 3V ≤V
IN
≤7V 0.005 0.2 %
∆V
OUT
Load Regulation
(Note 9)
LMS1585A-ADJEP
V
IN
−V
OUT
= 3V, 10mA ≤I
OUT
≤5A 0.05
0.3
0.5
%
LMS1585A-1.5EP/LMS1585A-3.3EP
V
IN
=5V,0≤I
OUT
≤5A
0.05
0.05
0.3
0.5
%
LMS1587-ADJEP
V
IN
−V
OUT
= 3V, 10mA ≤I
OUT
≤3A
0.05
0.05
0.3
0.5 %
LMS1587-1.5EP/LMS1587-3.3EP
V
IN
=5V,0≤I
OUT
≤3A
0.05
0.05
0.3
0.5
%
%
V
IN
−V
OUT
Dropout Voltage LMS1585A-ADJEP/LMS1587-ADJEP
∆V
REF
= 1%, I
OUT
= 3A 1.15 1.3 V
LMS1585A-3.3EP/LMS1587-3.3EP/
LMS1585A-1.5EP/LMS1587-1.5EP
∆V
OUT
= 1%, I
OUT
= 3A 1.15 1.3 V
LMS1585A-ADJEP
∆V
REF
= 1%, I
OUT
= 5A 1.2 1.4 V
LMS1585A-1.5EP/LMS1585A-3.3EP
∆V
OUT
= 1%, I
OUT
= 5A 1.2 1.4 V
LMS1585AEP/LMS1587EP Enhanced Plastic
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Electrical Characteristics (Continued)
Typicals and limits appearing in normal type apply for T
J
= 25˚C. Limits appearing in Boldface type apply over the entire junc-
tion temperature range for operation, 0˚C to 125˚C for commercial grade and −40˚C to 125˚C for Enhanced Plastic.
Symbol Parameter Conditions Min
(Note 8)
Typ
(Note 7)
Max
(Note 8) Units
I
LIMIT
Current Limit LMS1585A-ADJEP/LMS1585A-3.3EP/
LMS1585A-1.5EP
V
IN
−V
OUT
= 5.5V 5.0 6.6 A
LMS1587-ADJEP/LMS1587-3.3EP/
LMS1587-1.5EP
V
IN
−V
OUT
= 5.5V 3.1 4.3 A
Minimum Load
Current (Note 10)
LMS1585AEP/87-ADJEP
1.5V ≤V
IN
−V
OUT
≤5.75V 2.0 10.0 mA
Quiescent Current LMS1585A-3.3EP/LMS1587-3.3EP/
LMS1585A-1.5EP/LMS1587-1.5EP
V
IN
= 5V 7.0 13.0 mA
Thermal Regulation T
A
= 25˚C, 30ms Pulse 0.003 %/W
Ripple Rejection LMS1585A-ADJEP
f
RIPPLE
= 120Hz, V
IN
−V
OUT
= 3V,
I
OUT
= 5A, C
OUT
= 25µF Tantalum 72 dB
LMS1585A-1.5EP
f
RIPPLE
= 120Hz, C
OUT
= 25µF Tantalum,
I
OUT
= 5A, V
IN
= 4.5V 60 72 dB
LMS1585A-3.3EP
f
RIPPLE
= 120Hz, C
OUT
= 25µF Tantalum,
I
OUT
= 5A, V
IN
= 6.3V 72 dB
LMS1587-ADJEP
f
RIPPLE
= 120Hz, V
IN
−V
OUT
= 3V, I
OUT
=3A
C
OUT
= 25µF Tantalum 72 dB
LMS1587-1.5EP
f
RIPPLE
= 120Hz, C
OUT
= 25µF Tantalum,
I
OUT
= 3A, V
IN
= 4.5V 60 72 dB
LMS1587-3.3EP
f
RIPPLE
= 120Hz, C
OUT
= 25µF Tantalum,
I
OUT
= 3A, V
IN
= 6.3V 72 dB
Adjust Pin Current 55 120 µA
Adjust Pin Current 10mA ≤I
OUT
≤I
FULLLOAD
,
1.5V ≤V
IN
−V
OUT
≤5.75V (Note 11) 0.2 µA
Temperature Stability 0.5 %
Long Term Stability T
A
= 125˚C, 1000Hrs 0.03 %
RMS Output Noise
(% of V
OUT
)
10Hz ≤f≤10kHz 0.003 %
Thermal Resistance
Junction-to-Case
3-Lead TO-263: Control/Output Section
3-Lead TO-220: Control/Output Section
0.65/2.7
0.65/2.7
˚C/W
˚C/W
Note 4: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 5: The maximum power dissipation is a function of TJ(max) ,θJA, and TA. The maximum allowable power dissipation at any ambient temperature
is PD=(T
J(max)–T A)/θJA. All numbers apply for packages soldered directly into a PC board.
Note 6: For testing purposes, ESD was applied using human body model, 1.5kΩin series with 100pF.
Note 7: Typical Values represent the most likely parametric norm.
Note 8: All limits are guaranteed by testing or statistical analysis.
Note 9: Load and line regulation are measured at constant junction temperature, and are guaranteed up to the maximum power dissipation of 30W. Power
dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output
range.
Note 10: The minimum output current required to maintain regulation.
Note 11: IFULLLOAD is 5A for LMS1585AEP and 3A for LMS1587EP.
Note 12: Consult factory for other fixed voltage options.
LMS1585AEP/LMS1587EP Enhanced Plastic
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Application Note
Output Voltage
The adjustable version develops at 1.25V reference voltage,
(V
REF
), between the output and the adjust terminal. As
shown in Figure 1, this voltage is applied across resistor R1
to generate a constant current I1. This constant current then
flows through R2. The resulting voltage drop across R2 adds
to the reference voltage to sets the desired output voltage.
The current I
ADJ
from the adjustment terminal introduces an
output error. But since it is small (120µA max), it becomes
negligible when R1 is in the 100Ωrange.
For fixed voltage devices, R1 and R2 are integrated inside
the devices.
20099872
FIGURE 1. Basic Adjustable Regulator
LMS1585AEP/LMS1587EP Enhanced Plastic
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Physical Dimensions inches (millimeters)
unless otherwise noted
3-Pin TO-263
NS Package Number TS3B
LMS1585AEP/LMS1587EP Enhanced Plastic
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
3-Pin TO-220
NS Package Number T03B
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DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
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(CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2.
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LMS1585AEP/LMS1587EP Enhanced Plastic 5A and 3A Low Dropout Fast Response Regulators
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
