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PDF SPX1202 Data sheet ( Hoja de datos )
| Número de pieza | SPX1202 | |
| Descripción | 600mA Low Dropout NPN Voltage Regulator | |
| Fabricantes | Sipex | |
| Logotipo |  |
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® SPX1202
600mA Low Dropout Linear Regulator
FEATURES
APPLICATIONS
■ Guaranteed 600mA Output
■ SCSI-II Active Terminator
■ Three Terminal Adjustable or Fixed
2.5V, 3V and 3.3V
■ Portable/ Palm Top / Notebook
Computers
■ Low Quiescent Current
■ Battery Chargers
■ Low Dropout Voltage of 1.1V at Full Load ■ Disk Drives
■ 0.2% Line and 0.3% Load Regulation
■ Portable Consumer Equipment
■ Voltage Temperature Stability 0.05%
■ Portable Instrumentation
■ Overcurrent and Thermal Protection
■ SMPS Post-Regulator
■ Available Packages: SOT-223,TO-252,
TO-220, and TO-263
Now Available in Lead Free Packaging
Refer to page 6 for pinouts.
DESCRIPTION
The SPX1202 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 SPX1202 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. SPX1202 is available in adjustable
or fixed 2.5V, 3V and 3.3V output voltages.
The SPX1202 is offered in several 3-pin surface mount packages: SOT-223, TO-252, TO-220
and TO-263. An output capacitor of 10µF provides unconditional stability while a smaller 2.2µF
capacitor is sufficient for most applications.
BLOCK DIAGRAM
VIN
Current Limit
+
-
ICL
AMP
VOUT
Date: 5/25/04
Thermal Limit
I TL
VREF
ADJ/GND
IADJ ~–50µA
SPX1202 600mA Low Dropout Positive Linear Regulator
1
© Copyright 2004 Sipex Corporation
1 page  
tude of the output ripple will be independent of
the output voltage. If an ADJ-bypass capacitor
is not used, the output ripple will be proportional
to the ratio of the output voltage to the reference
voltage:
M = VOUT / VREF
Where M = multiplier for the ripple seen when
the ADJ pin is optimally bypassed.
V =1.25V
REF
Output Voltage
The output of the adjustable regulator can be set
to any voltage between 1.25V and 15V. The
value of VOUT can be quickly approximated
using the formula. (Figure 9)
V =1.25 *(R + R )/R .
OUT
1 21
A small correction to this formula is required
depending on the values of resistors R1 and R2,
since adjustable pin current (approx 50µA) flows
through R2. When IADJ is taken into account, the
formula becomes
VOUT = VREF(1+ (R2/R1)) + IADJ * R2,
where VREF=1.25V.
PC BOARD
AREA mm2
2500
2500
2500
2500
2500
1600
2500
2500
1600
900
900
Table 1
TOPSIDE COPPER BACKSIDE COPPER
AREA mm2
AREA mm2
2500
1250
950
2500
1800
600
1250
915
600
240
240
2500
2500
2500
0
0
1600
0
0
0
900
0
TYPICAL APPLICATIONS
THERMAL RESISTANCE
JUNCTION TO AMBIENT
°C/W
46
47
49
51
53
55
58
59
67
72
85
V IN IN
4.7µF + C 1
SPX1202
ADJ
IOUT =
VREF
R1
OUT
C
2
R1
IOUT
LOAD
VIN IN
4.7µF + C1
SPX1202
ADJ
I ADJ
50µA
VOUT = V REF (1+R 2 /R1) +IADJ R 2
OUT
VREF R1
VOUT
C2
R2
Figure 8. 600mA Current Source
Figure 9. Typical Adjustable Regulator
Date: 5/25/04
SPX1202 600mA Low Dropout Positive Linear Regulator
5
© Copyright 2004 Sipex Corporation
5 Page 
ORDERING INFORMATION
PART NUMBER
SPX1202U
SPX1202U-2.5
SPX1202U-3.0
SPX1202U-3.3
SPX1202T
SPX1202T/TR
SPX1202T-2.5
SPX1202T-2.5/TR
SPX1202T-3.0
SPX1202T-3.0/TR
SPX1202T-3.3
SPX1202T-3.3/TR
SPX1202M3
SPX1202M3/TR
SPX1202M3-2.5
SPX1202M3-2.5/TR
SPX1202M3-3.0
SPX1202M3-3.0/TR
SPX1202M3-3.3
SPX1202M3-3.3/TR
SPX1202R
SPX1202R/TR
SPX1202R-2.5
SPX1202R-2.5/TR
SPX1202R-3.0
SPX1202R-3.0/TR
SPX1202R-3.3
SPX1202R-3.3/TR
ACC.
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
OUTPUT VOLTAGE
Adj
2.5V
3.0V
3.3V
Adj
Adj
2.5V
2.5V
3.0V
3.0V
3.3V
3.3V
Adj
Adj
2.5V
2.5V
3.0V
3.0V
3.3V
3.3V
Adj
Adj
2.5V
2.5V
3.0V
3.0V
3.3V
3.3V
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SPX1587AT-5.0/TR = standard; SPX1587AT-L-5.0/TR = lead free
/TR = Tape and Reel
Pack quantity is 500 for TO-263, 2,000 for TO-252 and 2,500 for SOT-223.
PACKAGE
3 Pin TO220
3 Pin TO220
3 Pin TO220
3 Pin TO220
3 Pin TO-263
3 Pin TO-263
3 Pin TO-263
3 Pin TO-263
3 Pin TO-263
3 Pin TO-263
3 Pin TO-263
3 Pin TO-263
3 Pin SOT-223
3 Pin SOT-223
3 Pin SOT-223
3 Pin SOT-223
3 Pin SOT-223
3 Pin SOT-223
3 Pin SOT-223
3 Pin SOT-223
3 Pin TO-252
3 Pin TO-252
3 Pin TO-252
3 Pin TO-252
3 Pin TO-252
3 Pin TO-252
3 Pin TO-252
3 Pin TO-252
Corporation
ANALOG EXCELLENCE
Date: 5/25/04
Sipex Corporation
Headquarters
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
SPX1202 600mA Low Dropout Positive Linear Regulator
11
© Copyright 2004 Sipex Corporation
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SPX1202.PDF ] | |
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