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PDF SPX2815 Data sheet ( Hoja de datos )
| Número de pieza | SPX2815 | |
| Descripción | Low Dropout Voltage Regulator | |
| Fabricantes | Sipex Corporation | |
| Logotipo |  |
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SPX2815
1.5A Low Dropout Voltage Regulator
FEATURES
APPLICATIONS
■ Guaranteed 1.5A Output Current
■ Desktop PCs, Servers
■ Three Terminal Adjustable or Fixed
2.5V, 3.3V and 5.0V
■ Low Quiescent Current
■ Low Dropout Voltage of 1.1V @ 1.5A
■ 0.1% Line and 0.1% Load Regulation
■ Stable with 10uF Ceramic Capacitor
■ Overcurrent and Thermal Protection
■ Available Packages: TO-252,
TO-220, and TO-263
■ Similar to Industry Standard LT1086/
LT1586
■ Powering VGA and Sound Cards
■ Cordless Phones
■ Battery Chargers
■ Adjustable Power Supplies
■ Portable Instrumentation
■ SMPS Post-Regulator
■ Constant Current Regulators
■ Disk Drives
Refer to Page 5 for Pinouts
Now Available in Lead Free Packaging
DESCRIPTION
The SPX2815 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 SPX2815 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. SPX2815 is available in adjustable
or fixed 2.5V, 3.3V and 5.0V output voltages.
The SPX2815 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 (Adjustable)
VIN
Current Limit
Thermal Limit
I TL
+
-
ICL
+
–
_
AMP+ 1.25V
VOUT
VREF
ADJ/GND
IADJ ~ 50μA
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
1
© 2006 Sipex Corporation
1 page  
APPLICATION INFORMATION: Continued
VIN IN
4.7μF + C1
SPX2815
ADJ
I ADJ
50μA
VOUT = V REF (1+R 2 /R1) +IADJ R 2
OUT
VREF R1
VOUT
C2
R2
Figure 7. Typical Adjustable Regulator
(Note A)
V IN
+
4.7μF
SPX2815
IN OUT
ADJ
5V
R1
330Ω
1%
V
OUT
*C 1 improves ripple rejection.
ZC should be ~ R1 at ripple frequency
R2
1kΩ,
1%
10μF
+ C1
10μF*
Note A: VIN(MIN) = (Intended VOUT ) + (V DROPOUT (MAX))
Figure 8. Improving Ripple Rejection
VIN
(Note A)
+
SPX2815
IN OUT
4.7μF
ADJ
1K
TTL
Input
2N3904
1k
5V
330W
1%
+
10μF
1kΩ
1%
Note A: V = (Intended V ) + (V
)
IN(MIN)
OUT DROPOUT (MAX)
Figure 9. 5V Regulator with Shutdown
RP Parasitic Line
Resistance
VIN SPX2815
VOUT
ADJ
Connect R to
Case of Regulator R 1
R2
Connect R2
to Load
RL
Figure 10. Recommended Connections for Best Results
TO-252 (R)
TO-220-3 (U)
TO-263-3 (T)
PINOUTS
1 23
ADJ/GND
V
OUT
V IN
123
Front View
Note: Tab is connected to Pin 2 (Vout)
ADJ/GND V OUT V IN
Front View
123
ADJ/GND
V
OUT
V IN
Top View
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
5
© 2006 Sipex Corporation
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet SPX2815.PDF ] | |
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