SPX1587 Datasheet PDF - Exar
Part Number | SPX1587 | |
Description | 3A Low Dropout Voltage Regulator | |
Manufacturers | Exar | |
Logo | ||
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GENERAL DESCRIPTION
The SPX1587 is a low power positive-voltage
regulator designed to satisfy moderate power
requirements with a cost effective, small
footprint solution.
This device is an excellent choice for use in
battery-powered applications and portable
computers. The SPX1587 features very low
quiescent current and a low dropout voltage of
1.1V at a full load. As output current
decreases, quiescent current flows into the
load, increasing efficiency. SPX1587 is
available in adjustable or fixed 1.5V, 2.5V,
3.3V and 5.0V output voltages.
The SPX1587 is offered in several 3-pin
surface mount packages: TO-252, TO-220 and
TO-263. An output capacitor of 10μF ceramic
or tantalum provides unconditional stability.
FUNCTIONAL DIAGRAM
SPX1587
3A Low Dropout Voltage Regulator
Rev. 2.0.0
APPLICATIONS
• Desktop PC's Servers
• Powering VGA and Sound Cards
• Adjustable Power Supplies
• Portable Instrumentation
FEATURES
• Guaranteed 3A Output Current
• Three Terminal Adjustable or Fixed
1.5V, 2.5V, 3.3V and 5.0V
• Low Quiescent Current
• Low Dropout Voltage: 1.1V at 3A
• Line Regulation: 0.1%
• Load Regulation: 0.1%
• Stable with 10uF Ceramic Capacitor
• Over Current and Thermal Protection
• Similar to Industry Standard
LT1085/LT1585
• RoHS Compliant Lead Free 3-Pin
TO-220, TO-252 and TO-263 Packages
Fig. 1: SPX1587 Functional Diagram (Adjustable version)
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
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SPX1587
3A Low Dropout Voltage Regulator
TYPICAL PERFORMANCE CHARACTERISTICS
All data taken at VIN = VOUT + 1.5V, TA = 25°C, CIN = COUT =10µF, IOUT=10mA unless otherwise specified - Schematic and
BOM from Application Information section of this datasheet.
Fig. 4: Line Regulation for SPX1587U-3-3
IOUT=10mA
Fig. 5: VOUT versus Temperature
VIN=2.5V, IOUT=10mA
Fig. 6: VOUT versus Temperature
VIN=4.0V, IOUT=10mA
Fig. 7: VOUT versus Temperature
VIN=5.0V, IOUT=10mA
APPLICATION INFORMATION
OUTPUT CAPACITOR
To ensure the stability of the SPX1587, an
output capacitor of at least 10μF (ceramic or
tantalum) or 22μF (aluminum) is required. The
value may change based on the application
requirements of the output load or
temperature range. The value of ESR can vary
based on the type of capacitor used in the
applications to guarantee stability. The
recommended value for ESR is 0.5Ω or less. A
larger value of output capacitance (up to
100μF) can improve the load transient
response.
SOLDERING METHODS
The SPX1587 die is attached to the heatsink
lead which exits opposite the input, output,
and ground pins.
THERMAL CHARACTERISTICS
The SPX1587 features the internal thermal
limiting to protect the device during overload
conditions. Special care needs to be taken
during continuous load conditions such that
the maximum junction temperature does not
exceed 125°C. Thermal protection is activated
at >179°C and deactivated at <165 °C.
The thermal interaction from other
components in the application can affect the
© 2010 Exar Corporation
5/11
Rev. 2.0.0
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for SPX1587 electronic component. |
Information | Total 11 Pages | |
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