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PDF AS2870 Data sheet ( Hoja de datos )
| Número de pieza | AS2870 | |
| Descripción | 6.5A Low Dropout Voltage Regulator | |
| Fabricantes | Sipex Corporation | |
| Logotipo |  |
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AS2870
6.5A Low Dropout Voltage Regulator
Adjustable & Fixed Output,
Fast Response
FEATURES
• Adjustable Output Down To 1.2V
• Fixed Output Voltages 2.5, 3.3 & 5.0V
• Output Current of 6.5A
• Low Dropout Voltage 1.1V Typ.
• Extremely Tight Load And Line Regulation
• Current & Thermal Limiting
• Standard 3-Terminal Low Cost TO-220 & TO-263
APPLICATIONS
• Powering VGA & Sound Card
• Power PCSupplies
• 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 AS2870 are low power 6.5A 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 AS2870 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 AS2870 features low dropout of a maximum 1.5 volts.
The AS2870 offers full protection against over-current faults, 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 AS2870 are offered in a 3-pin TO-220 and TO-263 packages compatible with other 3 terminal regulators. For a 8A low dropout
regulator refer to the AS2880 data sheet.
ORDERING INFORMATION
TO-220
3-PIN
AS2870YU
AS2870YU-X
TO-263
3-PIN
AS2870YT
AS2870YT-X
X = Output Voltage (i.e. 3.3 for 3.3V, 5.0 for 5.0V etc.)
Y = Output Tolerance, A for 1%
Blank for 2%
Consult with factory for other fixed voltages
PIN CONNECTIONS
TO-263-3 (T)
TO-220-3 (U)
AS2870
1 23
AS2870
123
ADJ/GND VOUT VIN
Top View
ADJ/GND VOUT VIN
Front View
Rev. 9/29/00
1 page  
TYPICAL APPLICATIONS
VIN IN AS2870 OUT
C1
ADJ
R1
LOAD
Fig. 4 6.5A Current output Regulator
AS2870
VIN IN AS2870 OUT
VOUT
C1
ADJ
C2
R1
VOUT = VREF (1 + R2 ) + IADJ R2
R1
R2
Fig. 5 Typical Adjustable Regulator
(Note A)
VIN
+
10µF
IN OUT
AS2870
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
+ C1
10µF*
Fig. 6 Improving Ripple Rejection
VIN
(Note A)
+
IN OUT
AS2870
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. 9/29/00
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet AS2870.PDF ] | |
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