AS2880U-3.3 [SIPEX]
Fixed Positive LDO Regulator, 3.3V, 1.2V Dropout, BIPolar, PSFM3, TO-220, 3 PIN;
| 型号： | AS2880U-3.3 |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Fixed Positive LDO Regulator, 3.3V, 1.2V Dropout, BIPolar, PSFM3, TO-220, 3 PIN |
| 文件： | 总4页 (文件大小：181K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AS2880
8A Low Dropout Voltage Regulator
Adjustable & Fixed 3.3V
FEATURES
APPLICATIONS
• Adjustable Output Down to 1.2V or Fixed 3.3V & 5V
• Output Current of 8A
• Powering Intel Pentium µP from +5V Supplies
• Power PCSupplies
• Low Dropout Voltage
• SMPS Post-Regulator
• High Efficiency “Green” Computer Systems
• High Efficiency Linear Power Supplies
• Extremely Tight Load and Line Regulation
• Current & Thermal Limiting
• Standard 3-Terminal Low Cost TO-220
• Similar to Industry Standard LT1083/LT1584
Portable Instrumentation
•
• Constant Current Regulators
• Adjustable Power Supplies
• Battery Charger
PRODUCT DESCRIPTION
The AS2880 is a low power 8A Adjustable Voltage Regulator that is very easy to use. It requires only 2 external resistors to set the
output voltage. This device is an excellent choice when using Powering Intel Microprocessor to convert from +5V to 3.3V supplies,
and as a post regulator for switching supplies applications. The AS2880 features low dropout of a maximum 1.5 volts.
The AS2880 offers full protection against over-current faults, reversed input polarity, reversed load insertion, over temperature
operation, 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 AS2880 is offered in a 3-pin TO-220 package compatible with older 3-terminal regulators. When using ALPHA Semiconductor
design, processing and testing techniques make AS2880 superior over similar products on the market. For a 5A low dropout regulator
refer to the AS2850 datasheet.
ORDERING INFORMATION
TO-220
3-PIN
AS2880AU
PIN CONNECTIONS
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%
TO-220-3 (U)
Consult factory for other fixed voltages.
AS2880
1
2
3
VIN
V
ADJ/GND
OUT
Front View
Rev. 10/11/00
AS2880
ABSOLUTE MAXIMUM RATINGS
Power Dissipation..........................................Internally Limited
Lead Temp. (Soldering, 10 Seconds) .............................. 300°C
Storage Temperature Range ............................-65° to +150°C
Operating Junction Temperature Range
Input Supply Voltage ....................................................+10V
Input to Output Voltage Differential.............................. 8.8V
AS2880 Control Section............................0C° to +125°C
AS2880 Power Transistor..........................0C° to +150°C
ELECTRICAL CHARACTERISTICS (Note 1) at IOUT = 10mA, T = 25 C, unless otherwise specified.
°
A
Parameter
Conditions
AS2880A
Min
AS2880
Units
Typ
Max
Min
Max
3.3V Version
Output Voltage (Note 2)
3.3
3.3
3.270
3.240
3.330
3.360
3.230
3.201
3.370
3.399
V
AS2880-3.3V, 0≤IOUT1.5A,
4.75V≤VIN≤7V
5.0V Version
Output Voltage (Note 2)
5.0
5.0
4.950
4.900
5.050
5.100
4.900
4.650
5.100
5.150
AS2880-3.3V, 0≤IOUT1.5A,
6.5V≤VIN≤7V
All Voltage Options
Reference Voltage
1.250
1.238
1.225
1.262
1.238
1.225
1.262
V
10mA ≤ IOUT ≤ IFULLLOAD
1.250
1.270
1.270
3.3V≤(VIN - VOUT )≤ VIN MAX – VOUT MAX
(VIN- VOUT) = VIN MAX – VOUT MAX
Mid Load Current
Line Regulation
mA
%
5
10
10
0.015
0.05
0.1
0.2
1.1
0.2
0.5
0.3
0.4
1.2
0.2
0.5
0.3
0.4
1.2
1.5V ≤VIN - VOUT ≤ VIN MAX – VOUT MAX
I
LOAD = 10mA
Load Regulation
Dropout Voltage
%
V
10mA ≤ IOUT ≤ IFULLLOAD
(VIN - VOUT)=3V
IOUT=IFULLLOAD , ∆VREF=1%
Current Limit
VIN - VOUT=5V
A
9.5
8.0
8.0
Long Term Stability
0.3
1
90
5
1
90
5
%
TA=125°C, 1000Hrs.
Adjust Pin Current
55
0.2
TA=25°C
µA
µA
%/W
%
Adjust Pin Current
Change
Thermal Regulation
30ms pulse
0.003
0.5
0.01
0.01
Temperature Stability
Ripple Rejection Ratio
VIN - VOUT=3V
dB
75
60
60
IOUT =3A, COUT = 25µF, CADJ = 25µF,
f= 120Hz
Output Noise, RMS
10Hz to 10kHz
0.003
% VO
Thermal Resistance
TO-220
Junction to Tab
2.7
2.7
°C/W
Junction-to-Case
Junction to Ambient
0.65
0.65
The Bold specifications apply to the full operating temperature range.
Note 1: Changes in output voltage due to heating effects are covered under the specification for thermal regulation.
Note 2: A 10µF output capacitor is required on AS2880
Rev. 10/11/00
AS2880
TYPICAL CHARACTERISTICS
Rev. 10/11/00
AS2880
TYPICAL APPLICATIONS
OUT
VIN
VIN
VOUT
OUT
IN
AS2880
IN
AS2880
C1
C2
C1
ADJ
ADJ
VREF
R1
R2
R1
LOAD
+ IADJ
2
R2
VOUT = VREF 1+ R
R1
Typical Adjustable Regulator
8A Current Output Regulator
3.45V
VCC
VIN
AS2880
OUT
IN
+5V
C2
C1
ADJ
R1
R2
Powering Intel PentiumTM with AS2880
Pentium Processor is a trademark of Intel Corp. Power PC is a trademark of IBM Corp.
Rev. 10/11/00
相关型号：
AS2884AT
Adjustable Positive LDO Regulator, 1.225V Min, 1.275V Max, 1.2V Dropout, PSSO2, PLASTIC, TO-263, D2PAK-3
CALOGIC
AS2884AU-3.5
Fixed Positive LDO Regulator, 3.5V, 1.2V Dropout, PSFM3, PLASTIC, TO-220, 3 PIN
CALOGIC
©2020 ICPDF网 联系我们和版权申明