LX8587-XXCDD

Manufacturer Part NumberLX8587-XXCDD
Description3A Low Dropout Positive Regulators
ManufacturerMICROSEMI [Microsemi Corporation]
LX8587-XXCDD datasheet
 
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TM
D E S C R I P T I O N
The LX8587/87A Series ICs are positive
regulators designed to provide 3A output
current.
Pentium® Processor and Power
PC™ applications requiring fast transient
response are ideally suited for this product
family.
The LX8587A is guaranteed to have
<1.2 dropout at 3A and the LX8587 < 1.3V
at the same current, making them ideal to
provide well-regulated outputs of 2.5V to
3.6V using a 5V input supply.
Fixed
versions are also available and specified in
the Available Options table below.
IMPORTANT: For the most current data, consult MICROSEMI’s website:
P R O D U C T H I G H L I G H T
T
A
LX8587/87A
YPICAL
PPLICATION OF THE
IN
LX8587A
V
> 4.75V
IN
+
*1500µF
ADJ
6MV1500GX
Sanyo
The output capacitors must be low ESR and low ESL type for good transient response
Max Dropout
T
(°C)
A
Voltage
1.3V
0 to 125
1.2V
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8587-00CP-TR)
Copyright © 2000
Rev. 2.0a, 2005-10-25
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
3A Low Dropout Positive Regulators
®
P
Current limit is trimmed about 3.1A to
ensure adequate output current and
controlled short-circuit current. On-chip
thermal limiting provides protection against
any combination of overload conditions that
would create excessive junction
temperatures.
The LX8587/87A family of products are
available in the TO-220 through hole, the
TO-263 surface-mount, and the TO-252
surface-mount packages. For higher current
applications see the LX8585 and the
LX8584 data sheets.
http://www.microsemi.com
5V
3.3V M
IN A
TO
OTHERBOARD
OUT
3.3V
at 3A
121Ω
1%
+
1500µF
2x 6MV1500GX
Sanyo
200Ω
1%
.
PACKAGE ORDER INFO
Plastic TO-220
Plastic TO-252
DT
P
3-Pin
(D-Pak) 3-Pin
RoHS Compliant
RoHS Compliant
Transition DC: 0532
Transition DC: 0543
LX8587-xxCDT
LX8587-xxCP
LX8587A-xxCDT
LX8587A-xxCP
Microsemi
Integrated Products
LX8587x-xx
D
S
RODUCTION
ATA
HEET
K E Y F E A T U R E S
Three-Terminal Adjustable Or
Fixed Output
Guaranteed < 1.2V Headroom At
3A (LX8587A)
Guaranteed < 1.3V Headroom At
3A (LX8587)
Output Current of 3A
Fast Transient Response
1% Voltage Reference Initial
Accuracy
Output Short Circuit Protection
Built-In Thermal Shutdown
A P P L I C A T I O N S
Pentium Processor Supplies
Power PC Supplies
Microprocessor Supplies
Low Voltage Logic Supplies
Post Regulator for Switching
Supply
ASIC & Low Voltage Chipset
Supplies
Graphics & Sound Cards
Processor I/O Supply
O U T P U T
P A R T #
V O L T A G E
LX8587/87A-00
Adjustable
LX8587/87A-15
1.5V
LX8587/87A-33
3.3V
Table 1 - Available Options
Plastic TO-263
DD
3-Pin
RoHS Compliant
Transition DC: 0535
LX8587-xxCDD
LX8587A-xxCDD
Page 1

LX8587-XXCDD Summary of contents

  • Page 1

    ... Post Regulator for Switching Supply ASIC & Low Voltage Chipset Supplies Graphics & Sound Cards Processor I/O Supply LX8587/87A-00 Adjustable LX8587/87A-15 1.5V LX8587/87A-33 3.3V Table 1 - Available Options Plastic TO-263 DD 3-Pin RoHS Compliant Transition DC: 0535 LX8587-xxCDD LX8587A-xxCDD Page 1 ...

  • Page 2

    ... JA , θ T 2.7°C θ A 60°C/W MBIENT JA , θ T 2.7°C θ Microsemi Integrated Products LX8587x- RODUCTION ATA HEET TAB is V OUT OUT ADJ / 1 GND (3- ) ACKAGE PIN (Top View) TAB is V ...

  • Page 3

    ... TM Unless otherwise specified, the following specifications apply over the operating ambient temperature for the LX8587x-xx with ≤ ≤ 0°C T 125°C. Test conditions junction and case temperatures equal to the ambient temperature. Parameter LX8587-00/87A-00 (ADJUSTABLE) Reference Voltage Line Regulation (Note 2) ...

  • Page 4

    ... LX8585-xxI with -25° 3A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient OUT temperature. Parameter LX8587-15 / 8587A-15 (1.5V FIXED)(CONTINUED) Maximum Output Current Temperature Stability (Note 3) Long Term Stability (Note 3) RMS Output Noise (% OUT (Note 3) LX8587-33/87A-33 (3 ...

  • Page 5

    ... TM The LX8587/87A Series ICs are easy to use Low-Dropout (LDO) voltage regulators. They have all of the standard self- protection features expected of a voltage regulator: short circuit protection, safe operating area protection and automatic thermal shutdown if the device temperature rises above approximately 165°C. ...

  • Page 6

    ... OUT FIGURE 2 - BASIC ADJUSTABLE REGULATOR LOAD REGULATION Because the LX8587/87A regulators are three-terminal ) × devices not possible to provide true remote load sensing. R Load regulation will be limited by the resistance of the wire connecting the regulator to the load ...

  • Page 7

    ... DROPOUT(MAX) installed regulator. THERMAL CONSIDERATIONS The LX8587/87A regulators have internal power and thermal limiting circuitry designed to protect each device under overload conditions. For continuous normal load conditions, however, maximum junction temperature ratings must not be exceeded important to give careful consideration to all sources of thermal resistance from junction to ambient ...

  • Page 8

    ... OUT OUT 5V 121Ω 100µF 365Ω 10µF Tantalum or 1% 100µF Aluminum FIGURE 7 - FIXED 3.3V OUTPUT REGULATOR + ) V OUT DROPOUT(MA X) Microsemi Integrated Products LX8587x- RODUCTION ATA HEET IN OUT R1 121Ω 1% ADJ + R2 1k ⎛ ⎞ R2 ⎜ ⎟ + 1.25V 1 ⎝ ...

  • Page 9

    ... Dim Seating Plane Microsemi Integrated Products LX8587x- RODUCTION ATA HEET M I ILLIMETERS NCHES MIN MAX MIN MAX 14.22 15.88 0.560 0.625 9.65 10.67 0.380 0.420 3.56 4.83 0.140 0.190 0.51 1.14 0.020 0.045 3.53 4.09 0.139 ...

  • Page 10

    ... Dim 0. Microsemi Integrated Products LX8587x- RODUCTION ATA HEET M I ILLIMETERS NCHES MIN MAX MIN MAX 6.47 6.73 0.255 0.265 5.97 6.23 0.235 0.245 2.16 2.42 0.085 0.095 0.68 0.94 0.027 0.037 0.38 0.64 0.015 0.025 ...

  • Page 11

    ... LinFinity reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2000 Rev. 2.0a, 2005-10-25 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 3A Low Dropout Positive Regulators ® P RODUCTION Microsemi Integrated Products LX8587x- ATA HEET Page 11 ...