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查询SPX1129供应商
®
400mA Low Dropout Voltage Regulator
FEATURES
■ 1% Output Accuracy 3.3V, 5V,
at 500mA Output
■ Very Low Quiescent Current
■ 0.42V Dropout Voltage at 400mA
■ Extremely Tight Load and Line Regulation
■ Current & Thermal Limiting
■ Reverse Battery Protection
■ Equivalent Replacement For LT1129
APPPLICATIONS
■ Power Supply
■ Communications Equipment
■ Computers and Peripherals
SPX1129
SPX1129
3 Pin TO-263
123
V
OUT
V
GND
IN
SPX1129
3 Pin TO-263
123
V
GND
V
OUT
IN
Now Available in Lead Free Packaging
SPX1129
3 Pin TO-220
V
OUT
SPX1129
TO-252
GND
321
V
IN
3
2
1
V
GND
V
IN
OUT
DESCRIPTION
The SPX1129 is a low power voltage regulator. This device is an excellent choice for use in battery-powered
applications such as cordless telephones, radio control systems, and portable computers. The SPX1129
features very low quiescent current and very low dropout voltage of 0.42 volts. This includes a tight initial
tolerance of ±1% max, and a very low output temperature coefficient, making the SPX1129 useful as a lowpower voltage reference.
The SPX1129 is offered in a SOT-223, TO-220, TO-252 & TO-263 3 lead packages.
TYPICAL APPLICATION CIRCUIT
I
V
IN
IN
IN
OUT
SPX1129
+
0.1µF
IIN = IL + I
G
GND
I
G
Fixed +5V Regulator Circuit..
Date: 5/25/04 SPX1129 400mA Low Dropout Voltage Regulator ©Copyright 2004 Sipex Corporation
5V
+
2.2µF
LOAD
I
L
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Power Dissipation ........................................................ Internally Limited
Lead Temp. (Soldering, 5 Seconds) ............................................. 260°C
Storage Temperature Range ........................................ -65°C to +150°C
Operating Junction Temperature Range .......................-40°C to +125°C
Electrical characteristics at VIN = 6V, IO = 1mA, C
the full operating temperature range.
= 2.2µF, TA= 25°C, unless otherwise specified. Boldface applies over
OUT
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage ....................................................... -20V to +20V
ESD Rating .............................................................................. 2kV Min
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS TYP MIN MAX UNITS
(Note 2)
3.3V Version
Output Voltage 3.3 3.267 3.333 V
1mA ≤ IL ≤ 400mA 3.3 3.217 3.382
Reverse Output Current V
= 3.3V, VIN= 0V 16 25 µA
OUT
5.0V Version
Output Voltage 5.0 4.950 5.050 V
1mA ≤ IL ≤ 400mA 5.0 4.880 5.120
Reverse Output Current V
= 5.0V, VIN= 0V 16 25 µA
OUT
All Voltage Options
Output Voltage 20 100 ppm/°C
Temperature Coefficient (Note1)
Line Regulation 6V ≤ V
≤ 20V (Note 4) 1.5 10 mV
IN
Load Regulation (Note 3) IL=1 to 400mA 6 20 mV
30
Dropout Voltage (Note 5) IL=1mA 0.13 0.17 V
0.25
IL=400mA 0.42 0.55
0.70
Ground Current IL=1mA 100 200 µA
IL=10mA 350 500
IL=50mA 1.5 3 mA
IL=100mA 26
IL=400mA 725
Current Limit V
Ripple Rejection
Input Reverse Leakage Current VIN= -20V, V
=0 330 800 mA
OUT
VIN -V
=1V(Avg)
OUT
V
=0.5Vp-p, F
RIPPLE
I
=400mA, TJ= 25°C
LOAD
,5850 dB
=120Hz,
RIPPLE
=0V 1.0 mA
OUT
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by
the total temperature range.
Note 2: Unless otherwise specified all limits are guaranteed for Tj = 25°C, VIN = 6V, IL = 1mA and CL = 2.2µF.
Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes
in output voltage due to heating effects are covered under the specification for thermal regulation.
Note 4: Line regulation for the SPX1129 is tested at 25°C for IL = 1 mA. For TJ = 125°C, line regulation is guaranteed
by design.
Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below
its nominal value measured at 1V differential.
Date: 5/25/04 SPX1129 400mA Low Dropout Voltage Regulator ©Copyright 2004 Sipex Corporation
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APPLICATION INFORMATION
External Capacitors
The stability of the SPX1129 requires a 2.2µF or
greater capacitor between output and ground.
Oscillation could occur without this capacitor.
Most types of tantalum or aluminum electrolytic
works fine here. For operations of below -25°C
solid tantalum is recommended since the many
aluminum types have electrolytes that freeze at
about -30°C. The ESR of about 5Ω or less and
resonant frequency above 500kHz are the most
important parameters in the value of the capacitor. The capacitor value can be increased without limit.
The SPX1129, unlike other low dropout regulators will remain stable and in regulation with no
load in addition to the internal voltage divider.
This feature is especially important in applications like CMOS RAM keep-alive.
If there is more than 10 inches of wire between
the input and the AC filter capacitor, or if a
battery is used as the input, then a 0.1µF tantalum or aluminum electrolytic capacitor should
be placed from the input to the ground.
Reducing Output Noise
It may be an advantage to reduce the AC noise
present at the output. One way is to reduce the
regulator bandwidth by increasing the size of
the output capacitor. Increasing the capacitor
from 1µF to 220µF decreases the noise from
430µV to 160µV rms for a 100kHz bandwidth
at 5V output.
Date: 5/25/04 SPX1129 400mA Low Dropout Voltage Regulator ©Copyright 2004 Sipex Corporation
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PACKAGE: 3 PIN TO-253
K
B
TERMINAL 8
V
A
S
H
G
D
U
E
M
L
W
P
-A-
N
R
C
DIMENSIONS
in inches
SYMBOL MIN MAX
A .396 0.406
B 0.326 0.336
C 0.170 0.180
D 0.026 0.036
E 0.045 0.055
G 0.100 REF 0.100 REF
H 0.580 0.620
K 0.055 0.066
L .000 .010
M 0.098 0.108
N .017 .023
P .090 .110
R0° 8°
S .095 .105
U .30 REF .30 REF
V .305 REF .305 REF
W .010 .010
3 Pin TO-263
Date: 5/25/04 SPX1129 400mA Low Dropout Voltage Regulator ©Copyright 2004 Sipex Corporation
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H1
V
PACKAGE: 3 PIN TO-220
φ P
E
α (5X)
Q
D
E-PIN
b1
L
e3
e
e1
C
L
A
F
R
C1
J1
DIMENSIONS
in inches
SYMBOL MIN MAX
A0.160 0.190
b0.025 0.040
C1 0.015 0.022
D0.560 0.590
E0.385 0.415
e0.090 0.110
e1 0.190 0.210
e3 0.045 0.055
F0.045 0.055
H1 0.234 0.258
J1 0.090 0.115
φ P0.146 0.156
Q0.103 0.113
L0.540 0.560
α 3° typ 7° typ
b1 0.450 0.060
R0.243 REF 6.170 REF
U0.300 REF 7.620 REF
V0.240 REF 6.100 REF
3 Pin TO-220
Date: 5/25/04 SPX1129 400mA Low Dropout Voltage 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 SPX1129 400mA Low Dropout Voltage Regulator ©Copyright 2004 Sipex Corporation
.055 .060 .070
.108 REF
.020 BSC
3 PIN TO-252
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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
A
C
See detail
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 SPX1129 400mA Low Dropout Voltage Regulator ©Copyright 2004 Sipex Corporation
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ORDERING INFORMATION
PART NUMBER ACCURACY TEMPERATURE OUTPUT VOLTAGE PACKAGES
SPX1129M3-3.3 ................ 1% ........................ -40°C to 125°C ................... 3.3V ................... 3-Pin SOT-223
SPX1129M3-3.3/TR ........... 1% ........................ -40°C to 125°C ................... 3.3V ................... 3-Pin SOT-223
SPX1129M3-5.0 ................ 1% ........................ -40°C to 125°C ................... 5.0V ................... 3-Pin SOT-223
SPX1129M3-5.0/TR ........... 1% ........................ -40°C to 125°C ................... 5.0V ................... 3-Pin SOT-223
SPX1129R-3.3 ...................1% ........................ -40°C to 125°C ................... 3.3V ..................... 3-Pin TO-252
SPX1129R-3.3/TR ............. 1% ........................ -40°C to 125°C ................... 3.3V ..................... 3-Pin TO-252
SPX1129R-5.0 ...................1% ........................ -40°C to 125°C ................... 5.0V ..................... 3-Pin TO-252
SPX1129R-5.0/TR ............. 1% ........................ -40°C to 125°C ................... 5.0V ..................... 3-Pin TO-252
SPX1129T3-3.3 ................. 1% ........................-40°C to 125°C ................... 3.3V ..................... 3-Pin TO-263
SPX1129T3-3.3/TR ........... 1% ........................ -40°C to 125°C ................... 3.3V ..................... 3-Pin TO-263
SPX1129T3-5.0 ................. 1% ........................-40°C to 125°C ................... 5.0V ..................... 3-Pin TO-263
SPX1129T3-5.0/TR ........... 1% ........................ -40°C to 125°C ................... 5.0V ..................... 3-Pin TO-263
SPX1129U-3.3 ...................1% ........................ -40°C to 125°C ................... 3.3V ..................... 3-Pin TO-220
SPX1129U-5.0 ...................1% ........................ -40°C to 125°C ................... 5.0V ..................... 3-Pin TO-220
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SPX1129T3-5.0/TR = standard; SPX1129T3-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.
Corporation
ANALOG EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
Date: 5/25/04 SPX1129 400mA Low Dropout Voltage Regulator ©Copyright 2004 Sipex Corporation
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