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PDF SPX1587 Data sheet ( Hoja de datos )
| Número de pieza | SPX1587 | |
| Descripción | 3A Low Dropout Voltage Regulator | |
| Fabricantes | Sipex | |
| Logotipo |  |
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SPX1587
3A Low Dropout Voltage Regulator
Adjustable & Fixed Output,
Fast Response
FEATURES
• Adjustable Output Down To 1.2V
• Fixed Output Voltages 1.5, 2.5, 3.3, 5.0V
• Output Current Of 3A
• Low Dropout Voltage 1.1V Typ.
• Extremely Tight Load And Line Regulation
• Current & Thermal Limiting
• Standard 3-Terminal Low Cost TO-220, TO-263 & TO-252
• Similar To Industry Standard LT1085/LT1585
APPLICATIONS
• Powering VGA & Sound Card
• Power PC Supplies
• SMPS Post-Regulator
• High Efficiency “Green” Computer Systems
• High Efficiency Linear Power Supplies
• Portable Instrumentation
• Constant Current Regulators
• Adjustable Power Supplies
• Battery charger
PRODUCT DESCRIPTION
The SPX1587 is a low power 3A adjustable and fixed voltage regulator that is very easy to use. It requires only 2 external resistors to
set the output voltage for adjustable version. The SPX1587 are designed for low voltage applications that offers lower dropout voltage
and faster transient response. This device is an excellent choice for use in powering low voltage microprocessor that require a lower
dropout, faster transient response to regulate from +2.5V to 3.8V supplies and as a post regulator for switching supplies applications.
The SPX1587 features low dropout of a maximum 1.2 volts.
The SPX1587 offers over current limit and full protection against reversed input polarity, reversed load insertion, and positive and
negative transient voltage. On-Chip trimming adjusts the reference voltage to 1%. The IQ of this device flows into the load, which
increases efficiency.
The SPX1587 are offered in a 3-pin TO-220, TO-263 & TO-252 packages compatible with other 3 terminal regulators. For a 5A low
dropout regulator refer to the SPX1585 data sheet.
PIN CONNECTIONS
TO-263-3 (T)
TO-220-3 (U)
TO-252 (R)
SPX1587
1 23
ADJ/GND VOUT VIN
Top View
SPX1587
123
ADJ/GND VOUT VIN
Front View
SPX1587
123
ADJ/GND VOUT VIN
Front View
Rev. 10/30/00
1 page  
TYPICAL APPLICATIONS
SPX1587
VIN IN SPX1587 OUT
VIN
IN SPX1587
OUT
VOUT
C1
C1
ADJ
R1 C2
ADJ
R1
LOAD
Fig. 4 3A Current output Regulator
VOUT = VREF (1 + R2 ) + IADJ R2
R1
R2
Fig. 5 Typical Adjustable Regulator
(Note A)
VIN
+
10µF
IN OUT
SPX1587
ADJ
5V
R1
121Ω
1%
VOUT
*C1 improves ripple rejection. XC
should be ~ R 1 at ripple frequency.
R2
365Ω
1%
Note A: VIN(MIN)= (Intended VOUT) + (VDROPOUT (MAX))
150µF
+ 1C01µF*
Fig. 6 Improving Ripple Rejection
VIN
(Note A)
+
IN OUT
SPX1587
ADJ
10µF
TTL
Input
1k
2N3904
1k
5V
121Ω
1%
+
100µF
365Ω
1%
Note A: VIN(MIN)= (Intended VOUT) + (VDROPOUT (MAX))
Fig.7 5V Regulator with Shutdown
Rev. 10/30/00
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet SPX1587.PDF ] | |
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