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查询SPX1202供应商
®
600mA Low Dropout Linear Regulator
SPX1202
FEATURES
■ Guaranteed 600mA Output
■ Three Terminal Adjustable or Fixed
2.5V, 3V and 3.3V
■ Low Quiescent Current
■ Low Dropout Voltage of 1.1V at Full Load
■ 0.2% Line and 0.3% Load Regulation
■ Voltage Temperature Stability 0.05%
■ Overcurrent and Thermal Protection
■ Available Packages: SOT-223,TO-252,
TO-220, and TO-263
APPLICATIONS
■ SCSI-II Active Terminator
■ Portable/ Palm Top / Notebook
Computers
■ Battery Chargers
■ Disk Drives
■ Portable Consumer Equipment
■ Portable Instrumentation
■ SMPS Post-Regulator
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
V
IN
Current Limit
Thermal Limit
I
TL
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
+
-
V
ADJ/GND
~
I
–
ADJ
OUT
50µA
I
CL
AMP
V
REF
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ABSOLUTE MAXIMUM RATINGS
Power Dissipation ...................................... Internally Limited
Lead Temperature (soldering, 5 seconds) .................. 260°C
Storage Temperature Range ...................... -65°C to +150°C
Operating Junction Temperature Range ..... -40°C to +125°C
Input Supply Voltage ..................................................... +20V
ESD Rating .............................................................. 2kV min
ELECTRICAL CHARACTERISTICS
at VIN=V
full operating temperature range.
PARAMETER CONDITIONS TYP MIN MAX UNITS
2.5V Version
Output Voltage I
3.0V Version
Output Voltage I
3.3V Version
Output Voltage I
All Output Options
Reference Voltage I
Output Voltage (Note 1) 0.05 %
Temperature Stability
Line Regulation 4.50V≤VIN≤ 12V,V
Load Regulation 0≤I
Dropout Voltage IL =100mA 1.00 1.10 V
(Note 2) IL =600mA 1.05 1.15
Quiescent Current 4.25V≤VIN≤ 6.5V 5.00 10.00 mA
Adjust Pin Current 50 µA
Current Limit (VIN-V
Thermal Regulation 25°C, 30mS Pulse 0.01 0.1 %/W
Ripple Rejection f
Long Term Stability 125°C, 1000Hrs 0.03 %
RMS Output Noise % of V
Thermal Resistance Junction to Case, at tab 15 °C/W
NOTES:
Note 1: Output temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 2: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential at
Note 3: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied excluding load or line regulation effect.
+ 1.5V, TA = 25°C, CIN = C
OUT
= 10mA, VIN = 5.00V 2.475 2.500 2.525 V
OUT
0 ≤ I
OUT
= 10mA, VIN = 5.00V 2.970 3.000 3.030 V
OUT
0 ≤ I
OUT
= 10mA, VIN = 5.00V 3.267 3.300 3.333 V
OUT
0 ≤ I
OUT
=10mA, (V
OUT
10≤I
OUT
4.80V≤VIN≤ 12V,V
6.50V≤VIN≤ 12V,V
OUT
0≤I
OUT
0≤I
OUT
=120Hz, (VIN-V
RIPPLE
V
RIPPLE
very low values of programmed output voltage, the minimum input supply voltage of 2V ( 2.3V over temperature) must be taken into account.
= 10µF, unless otherwise specified. Limits in Boldface applies over the
OUT
≤ 600mA, 4.50V ≤ V
≤ 600mA, 4.50V ≤ V
≤ 600mA, 4.50V ≤ V
- V
) = 2V 1.238 1.250 1.262 V
IN
≤ 600mA, 1.4V≤(VIN-V
OUT
OUT
OUT
OUT
=3.00,I
=3.30,I
=5.00,I
≤ 600mA,VIN=4.50V,V
≤ 600mA,VIN=4.80V,V
≤ 600mA,VIN=6.50V,V
)=5V .850 1.0 A
OUT
=1V
PP
, 10Hz≤f≤10kHz 0.003 %
OUT
OUT
≤ 10V 2.450 2.550
IN
≤ 10V 2.940 3.060
IN
≤ 10V 3.234 3.366
IN
)≤ 10V 1.225 1.270
OUT
=0 1.00 7.00 mV
OUT
=0 1.00 7.00
OUT
=0 1.00 10.00
OUT
=3.00 1.00 12.00 mV
OUT
=3.30 1.00 12.00
OUT
=5.0 1.00 15.00
OUT
)=3V, 60 75 dB
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
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TYPICAL PERFORMANCE CHARACTERISTICS
3.320
3.315
3.310
3.305
3.300
3.295
3.290
Output Voltage (V)
3.285
3.280
10 100 1000
Output Current (mA)
3.330
3.320
3.310
Vout (V)
3.300
4.8 9.8 14.8
Line Regulation at 25°C
Vin (V)
Figure 1. Load Regulation for SPX1202M3-3.3; Figure 2. Line Regulation for SPX1202M3-3.3;
VIN=4.8V, C
1.3
1.2
1.1
1.0
0.9
Dropout Voltage (V)
Figure 3. Dropout Voltage vs Output Current for
SPX1202M3-3.3; VIN=4.89V, C
=2.2µFV
OUT
=4.8V to 16V, C
IN
=2.2µF
OUT
Current Limit VS Temp
2.00
1.50
1.00
Current Limit (A)
0.50
100 200 300 400 500 600 700 800 900 1000
Output Current (mA)
0.00
-50 -25 0 25 50 75 100 125
Figure 4. Current Limit for SP1202M3-3.3; VIN=4.8V,
OUT
=2.2µF
CIN=C
Limit
=1.0µF, I
OUT
pulsed from 10mA to Current
OUT
Temp (°C)
Series 1
Series 2
Series 1
Series 2
3.340
SCOPE TRACING MISSING
Figure 5. Current Limit for SPX1202M3-3.3, Output
Voltage Deviation with I
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
=10mA to 1A Step.
OUT
2.320
3.300
(V)
OUT
V
3.280
3.260
3.240
-50 -30 -10 10 30 50 70 90 110 130
Figure 6. V
Current Limit
vs Temperature I
OUT
Temp (°C)
pilsed from 10mA to
OUT
Series 1
Series 2
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APPLICATION INFORMATION
Output Capacitor
To ensure the stability of the SPX1202, an
output capacitor of at least 10µF (tantalum or
ceramic)or 50µF (aluminum) is required. The
value may change based on the application
requirements of the output load or temperature
range. The value of ESR can vary based on the
type of capacitor used in the applications. The
recommended value for ESR is 0.5Ω or less. A
larger value of output capacitance (up to 100µF)
can improve the load transient response.
SOLDERING METHODS
The SPX1202 SOT-223 package is designed to
be compatible with infrared reflow or vaporphase reflow soldering techniques. During soldering, the non-active or mildly active fluxes
may be used. The SPX1202 die is attached to
the heatsink lead which exits opposite the input,
output, and ground pins.
50 X 50mm
35 X 17mm
16 X 10mm
Figure 7. Substrate Layout for SOT-223
in the application can effect the thermal resistance of the SPX1202. The actual thermal resistance can be determined with experimentation.
SPX1202 power dissipation is calculated as
follows:
PD = (VIN - V
OUT
)(I
OUT
)
Maximum Junction Temperature range:
Hand soldering and wave soldering should be
avoided since these methods can cause damage
to the device with excessive thermal gradients
on the package. The SOT-223 recommended
soldering method are as follows: vapor phase
reflow and infrared reflow with the component
preheated to within 65°C of the soldering temperature range
THERMAL CHARACTERISTICS
The thermal resistance of SPX1202 depends on
the type of package and PC board layout as
shown in Table 1. The SPX1202 features the
internal thermal limiting to protect the device
during overload conditions. Special care needs
to be taken during continuous load conditions
such that the maximum junction temperature
does not exceed 125°C. Thermal protection is
activated at >144°C and deactiviated at <137°C.
Taking the FR-4 printed circuit board and 1/16
thick with 1 ounce copper foil as an experiment,
the PCB material is effective at transmitting
heat with the tab attached to the pad area and a
ground plane layer on the backside of the substrate. Refer to table 1 for the results of the
experiment.
The thermal interaction from other components
TJ = T
(max) + PD* (Thermal Resistance)
AMBIENT
(Junction-to-ambient)
Maximum junction temperature must not exceed the 125°C.
Ripple Rejection
Ripple rejection can be improved by adding a
capacitor between the ADJ pin and ground as
shown in Figure 7. When ADJ pin bypassing is
used, the value of the output capacitor required
increases to its maximum. If the ADJ pin is not
bypassed, the value of the output capacitor can
be lowered to 10µF for an electrolytic aluminum
capacitor or 2.2µF for a solid tantalum capacitor
(Fig 10).
However the value of the ADJ-bypass capacitor
should be chosen with respect to the following
equation:
C = 1 / ( 6.28 * FR * R1 )
Where C = value of the capacitor in Farads
(select an equal or larger standard value),
FR = ripple frequency in Hz,
R1 = value of resistor R1 in Ohms.
If an ADJ-bypass capacitor is used, the ampli-
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
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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 = V
OUT
/ V
REF
Where M = multiplier for the ripple seen when
the ADJ pin is optimally bypassed.
V
=1.25V
REF
The output of the adjustable regulator can be set
to any voltage between 1.25V and 15V. The
value of V
using the formula. (Figure 9)
can be quickly approximated
OUT
=1.25 *(R1 + R2)/R1.
V
OUT
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 I
formula becomes
is taken into account, the
ADJ
Output Voltage
PC BOARD TOPSIDE COPPER BACKSIDE COPPER THERMAL RESISTANCE
AREA mm
2
AREA mm
2
V
OUT
where V
AREA mm
= V
2
REF
REF
(1+ (R2/R1)) + I
ADJ
=1.25V.
JUNCTION TO AMBIENT
* R2,
°C/W
2500 2500 2500 46
2500 1250 2500 47
2500 950 2500 49
2500 2500 0 51
2500 1800 0 53
1600 600 1600 55
2500 1250 0 58
2500 915 0 59
1600 600 0 67
900 240 900 72
900 240 0 85
Table 1
TYPICAL APPLICATIONS
V
IN
+
4.7µF
C
I
OUT
SPX1202
IN
1
V
REF
=
R
1
ADJ
OUT
LOAD
C
2
R
1
I
OUT
V
IN
+
4.7µF
V
=V
OUT
C
1
REF
IN
(1+R2/R
SPX1202
) +I
R
1
ADJ
ADJ
I
ADJ
50µA
2
OUT
V
REF
V
OUT
C
2
R
1
R
2
Figure 8. 600mA Current Source Figure 9. Typical Adjustable Regulator
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
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(Note A)
V
IN
4.7µF
improves ripple rejection.
*C
1
should be ~ R1 at ripple frequency
Z
C
Note A: V
IN(MIN)
+
= (Intended V
IN
OUT
SPX1202
ADJ
) + (V
DROPOUT (MAX)
OUT
R
330Ω
1%
)
4.7µF
1k
Note A: V
IN
1k
= (Intended V
IN(MIN)
SPX1202
ADJ
2N3904
OUT
) + (V )
DROPOUT (MAX)
OUT
k
1
1%
330Ω
1%
5V
Ω
+
10µF
5V
R
1kΩ,
1%
V
OUT
1
10µF
2
C
+
1
10µF*
V
IN
(Note A)
TTL
Input
+
Figure 10. Improving Ripple Rejection
Figure 11. 5V Regulator with Shutdown
LAYOUT CONSIDERATIONS
Parasitic line resistance can degrade load regulation. In order not to affect the behavior of the regulator,
it is best to connect R1 to the case as illustrated in Figure 12. For the same reason, R2 should be
connected to the negative side of the load.
Parasitic Line
R
P
V
IN
SPX1202
ADJ
Resistance
Connect R1to
Case of Regulator
R
R
1
2
V
OUT
R
L
Connect R
to Load
2
Figure 12. Recommended Connections for Best Results
PACKAGE PINOUTS
SOT-223 (M3)
ADJ/GND
132
V
OUT
Top View
TO-252 (R)
1
23
V
IN
ADJ/GND
V
V
IN
OUT
Front View
TO-220-3 (U)
ADJ/GND
1
23
V
OUT
V
IN
TO-263-3 (T)
ADJ/GND
1
V
Top View
2
3
V
IN
OUT
Front View
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
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PACKAGE: 3 PIN SOT-223
C
D
C
N
C
b2
E1
1
B
3 PIN SOT-223
JEDEC TO-261
(AA) Variation
B
e
b
Dimensions in (mm)
MIN NOM MAX
A
A1
A2
b
b2
c
D
E
E1
e
e1 4.60 BASIC
L
ø
0.02 - 0.10
1.50 1.60 1.70
0.66 0.76 0.84
2.90 3.00 3.10
0.23
6.30
6.70 7.00 7.30
3.30 3.50 3.70
0.75 - 0º
- - 1.80
0.30
6.50
2.30 BASIC
- 10º
0.35
6.70
E
C
See detail
A
A
H
A1
GAUGE
PLANE
SEATING
PLANE
L
0
b
WITH PLATING
c
BASE METAL
c
Section B-B
b2
Section C-C
3 PIN SOT-223
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
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PACKAGE: 3 PIN TO-252
GAUGE PLANE
L2
O
WITH PLATING
3 PIN TO-252
JEDEC TO-252
(AA) Variation
A1
c
D1
E1
H
c
c
L
(L1)
c
BASE METAL
CONTACT AREA
Dimensions in inches
MIN NOM MAX
- - .005
.018 - .024
.205 - -
.170 - -
.370 - .410
C
SEATING PLANE
A1
b
E1
E1/2
D1
L
L1
L2
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
.055 .060 .070
.108 REF
.020 BSC
3 PIN TO-252
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PACKAGE: 3 PIN TO-220
B
A1
A
SEATING
PLANE
CHAMFER
OPTIONAL
A
E
E2
Q
D
E/2
A
øP
H1
D1
L1
1
D
C
C
D
b
e
e1
L
C
A2
3 PIN TO-220
Dimensions in
(mm)
A
A1
A2
b
b2
c
D
D1
D2
E
E1
E2
e
e1
H1
L1
L2
∆P
Q
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
JEDEC TO-220
(AB) Variation
MIN NOM MAX
.140 - .190
.020 - .055
.080 - .115
.015 .027 .040
.045 - .070
.014 - .024
.560 - .650
.330 - .355
.480 - .507
.380 - .420
.270
-
- - .030
.100 BSC
.200 BSC
.230 - .270
- - .250
- - -
.139 - .161
.100 -
.135
.350
b
WITH PLATING
c
BASE METAL
CONTACT AREA
3 PIN TO-220
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PACKAGE: 3 PIN TO-263
E
123
e
b2
3-PIN TO-263
JEDEC TO-263
(AA) Variation
A
A1
b
c
D
D1 .270 - -
E
E1
e .100 BSC
H
L
L1
L2
L3
Dimensions in inches
.015 - .029
.330 - .380
.380 - .420
.245
.575 - .625
- -
E/2
b
MIN NOM MAX
.160 - .190
.000 - .010
.020 - .039
-
.070 - .110
-
-
.066
.070
.010 BSC
A
SEATING PLANE
L1
D
C2
H
B
B
c
See View C
GAUGE PLANE
SEATING
PLANE
0º-8º
L
A1
View C
b
WITH PLATING
-
c
BASE METAL
SECTION B-B
3 PIN TO-263
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
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ORDERING INFORMATION
PART NUMBER ACC. OUTPUT VOLTAGE PACKAGE
SPX1202U 1% Adj 3 Pin TO220
SPX1202U-2.5 1% 2.5V 3 Pin TO220
SPX1202U-3.0 1% 3.0V 3 Pin TO220
SPX1202U-3.3 1% 3.3V 3 Pin TO220
SPX1202T 1% Adj 3 Pin TO-263
SPX1202T/TR 1% Adj 3 Pin TO-263
SPX1202T-2.5 1% 2.5V 3 Pin TO-263
SPX1202T-2.5/TR 1% 2.5V 3 Pin TO-263
SPX1202T-3.0 1% 3.0V 3 Pin TO-263
SPX1202T-3.0/TR 1% 3.0V 3 Pin TO-263
SPX1202T-3.3 1% 3.3V 3 Pin TO-263
SPX1202T-3.3/TR 1% 3.3V 3 Pin TO-263
SPX1202M3 1% Adj 3 Pin SOT-223
SPX1202M3/TR 1% Adj 3 Pin SOT-223
SPX1202M3-2.5 1% 2.5V 3 Pin SOT-223
SPX1202M3-2.5/TR 1% 2.5V 3 Pin SOT-223
SPX1202M3-3.0 1% 3.0V 3 Pin SOT-223
SPX1202M3-3.0/TR 1% 3.0V 3 Pin SOT-223
SPX1202M3-3.3 1% 3.3V 3 Pin SOT-223
SPX1202M3-3.3/TR 1% 3.3V 3 Pin SOT-223
SPX1202R 1% Adj 3 Pin TO-252
SPX1202R/TR 1% Adj 3 Pin TO-252
SPX1202R-2.5 1% 2.5V 3 Pin TO-252
SPX1202R-2.5/TR 1% 2.5V 3 Pin TO-252
SPX1202R-3.0 1% 3.0V 3 Pin TO-252
SPX1202R-3.0/TR 1% 3.0V 3 Pin TO-252
SPX1202R-3.3 1% 3.3V 3 Pin TO-252
SPX1202R-3.3/TR 1% 3.3V 3 Pin TO-252
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.
Sipex Corporation
Headquarters
233 South Hillview Drive
Corporation
ANALOG EXCELLENCE
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator © Copyright 2004 Sipex Corporation
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
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