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PDF AS2830 Data sheet ( Hoja de datos )
| Número de pieza | AS2830 | |
| Descripción | 3A Low Dropout Voltage Regulator | |
| Fabricantes | Alpha Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AS2830 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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α
ALPHA
SEMICONDUCTOR
Excellence in Analog Power Products
AS2830
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 ALPHA Semiconductor AS2830 are low power 3A adjustable and fixed voltage regulators that are very easy to use. It requires
only 2 external resistors to set the output voltage for adjustable version. The AS2830 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 AS2830 features low dropout of a maximum 1.2 volts.
The AS2830 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 AS2830 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 AS2850 data sheet.
ORDERING INFORMATION
TO-220
DD PLASTIC
TO-252
3-PIN
3-PIN
DPAK
AS2830YU-X
AS2830YT-X AS2830YR-X
X = Output Voltage (i.e. 1.5 for 1.5V, 2.5 for 2.5V etc.)
Y= Output Tolerance, Y= A for 1%
Blank for 2%
Consult factory for other fixed voltages.
PIN CONNECTIONS
TO-263-3 (T)
TO-220-3 (U)
TO-252 (R)
ALPHA
AS2830
1 23
ADJ/GND VOUT VIN
Top View
ALPHA
AS2830
123
ADJ/GND VOUT VIN
Front View
ALPHA
AS2830
1 23
ADJ/GND VOUT VIN
Front View
Alpha Semiconductor Inc. 1031 Serpentine Lane. Pleasanton, CA 94566 Tel: (9250 417-1391 Fax: (925) 417-1390
Rev.8/10/99
1 page  
TYPICAL APPLICATIONS
AS2830
ALPHA
VIN IN AS2830 OUT
VIN
ALPHA
IN AS2830 OUT
VOUT
C1
C1
ADJ
C2
R1
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
ALPHA
IN OUT
AS2830
ADJ
5V
R1
121Ω
1%
VOUT
*C 1 improves ripple rejection. XC
should be ~ R 1 at ripple frequency.
R2
365Ω
1%
Note A: VIN(MIN) = (Intended VOUT) + (VDROPOUT (MAX) )
150µF
+ C1
10µF*
Fig. 6 Improving Ripple Rejection
VIN
(Note A)
+
ALPHA
IN OUT
AS2830
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
Alpha Semiconductor Inc. 1031Serpentine Lane. Pleasanton, CA 94566 Tel: (925) 417-1391 Fax: (925) 417-1390
Rev. 8/10/99
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet AS2830.PDF ] | |
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