SPX2931U-L-3.0 [EXAR]
Fixed Positive LDO Regulator, 3V, 0.6V Dropout, PSFM3, TO-220, 3 PIN;型号: | SPX2931U-L-3.0 |
厂家: | EXAR CORPORATION |
描述: | Fixed Positive LDO Regulator, 3V, 0.6V Dropout, PSFM3, TO-220, 3 PIN |
文件: | 总7页 (文件大小:149K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
SPX2931
100mA Low Dropout Voltage Regulator
FEATURES
•
•
•
•
•
3.5V, 3.3V, and 3.0V Versions are Available
•
•
•
•
Reverse Battery Protection
Short Circuit Protection
Output Current in Excess of 100 mA
Input-Output Differential is Less Than 0.6V
Mirror-Image Insertion Protection
60V Load Dump Protection
-20V Reverse Transient Protection
Internal Thermal Overload Protection
APPLICATION
•
•
•
Available in TO-220, TO-92, SOT-89, and SO-8 Package Types
Available as Adjustable with TTL Compatible Switch
Similar Improved to Industry Standard LM2931
•
•
•
Portable Instrumentation
Radio Control Systems
Cordless Telephones
PRODUCT DESCRIPTION
The SPX2931 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 SPX2931 features offers very low quiescent currents
(0.4 mA.), and very low drop output voltage (typ. 50 mV at light load and 300 mV at 100 mA). Other features include the logic-
compatible On/Off input which enables the regulator to be switched on and off. The SPX2931 is offered in a 3-pin TO-92/TO-220
package and SOT-89/SO-8 package.
PIN CONNECTIONS
TO-92 (N)
SOT-89 (M1)
SPX2931
8-Pin Surface Mount (S)
Fixed Output
TO-220-3 (U)
Fixed
1
2
3
VOUT
GND
GND
BYP
1
2
3
4
8
7
6
5
VIN
1
GND
GND
3
2
SPX2931
Top View
VOUT
VIN
SPX2931
GND
VIN
GND VOUT
1
2
3
1. V
ON/OFF
IN
2. GND
3. VOUT
Top View
Bottom View
Front View
Rev. 10/24/00
SPX2931
ABSOLUTE MAXIMUM RATINGS
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 +85°C
Input Supply Voltage.............................................-0.3 to +26V
ESD Rating.........................................................................2KV
ELECTRICAL CHARACTERISTICS at V = 14V, T = 25°C, I = 10 mA, C2 = 100 F, unless otherwise specified.
µ
S
A
O
( Note 1)
Parameter
Conditions
SPX2931A
Typ
SPX2931
Typ
Units
Min
Max
Min
Max
3.0 Volt Version
SPX2931A-3
SPX2931-3
Output Voltage
2.94
3.00
3.06
2.91
3.00
3.09
V
V
6V<VIN< 26V,
IO = 100 mA Over Temp.
3.00
3.00
SPX2931-3.3
2.88
3.12
2.85
3.15
3.3 Volt Version
SPX2931A-3.3
Output Voltage
3.23
3.30
3.36
3.20
3.30
3.39
V
V
6V < VIN< 26V,
IO = 100 mA Over Temp.
3.30
3.30
SPX2931-5
3.20
3.39
3.16
3.43
5 Volt Version
SPX2931A-5
Output Voltage
4.81
5.00
5.19
4.75
5.00
5.25
V
V
6V <VIN< 26V,
IO =100 mA Over Temp.
4.75
5.25
4.5
5.5
All Voltage Options
Long Term Stability
Line Regulation
20
20
4.0
mV/1000
mV
9V < VIN < 16V
2.0
4.0
14
10
30
50
0.2
0.1
0.6
1.0
30
50
0.2
0.1
0.6
1.0
6V < VIN < 26V,
5 mA < IO < 100 mA
Load Regulation
Dropout Voltage
14
mV
IO=10 mA
0.05
0.07
0.3
0.05
0.07
0.3
V
IO=50 mA
V
IO=100 mA
V
Quiescent Current
IO < 10 mA, 6V < VIN < 26V
-40°C < Tj < 85°C
IO = 100 mA, VIN = 14V,
TJ = 25°C
0.4
0.4
mA
15
15
mA
Maximum Operational Input
Voltage
Maximum Line Transient
26
60
33
70
26
50
33
70
V
V
RL= 500Ω, VO<5.5V, 100ms
VO > -0.3V, RL = 500Ω
Reverse Polarity Input
-15
-50
-30
-80
-15
-50
30
V
V
Voltage, DC
Reverse Polarity Input
Voltage, Transient
1% Duty Cycle, τ < 100ms,
RL = 500Ω
10Hz-100kHz, COUT=100µF
-80
Output Noise Voltage
Ripple Rejection
500
80
500
80
µVrms
dB
FO = 120Hz
Note 1: See TYPICAL APPLICATIONS notes to ensure constant junction temperature, low duty cycle pulse testing used.
Note 2: All limits are at 25°C or over the full operating temperature junction range of -40°C to +85°C.
Note 3: The maximum power dissipation is a function of maximum junction temperature, total thermal resistance, and ambient temperature.
Note 4: Human body model, 100 µF discharged through 1.5 KΩ.
Rev. 10/24/00
SPX2931
factor of two over the value needed for the entire
temperature range.
Application Hints
The SPX2931 requires an output capacitor for device stability.
The value required varies greatly depending upon the
application circuit and other factors. The high frequency
characteristics of electrolytic capacitors depend greatly on the
type and also on the manufacturer. Sometimes only bench
testing is the only means to determine the proper capacitor
Other points with linear regulators is that the twitch higher
output current stability decreases. In most applications the
SPX2931 is operating at few milliamps. In these
applications the output capacitance can be further reduced.
For example, when the regulator is running at 10mA output
current the output capacitance value is half compared to the
same regulator that is running at 100 mA.
type and value.
The high quality 100 µF aluminum
electrolytic covers all general application circuits, this stability
can be obtained with a tantalum electrolytic value of 47 µF.
With the SPX2931 adjustable regulator, the minimum value
of output capacitance is a function of the output voltage.
The value decreases with higher output voltages, since the
internal loop gain is reduced.
Another critical point of electrolytic characteristics is its
performance over temperature. The SPX2931 is designed to
operate starting at -40°C which may not be true in the case of
electrolytic. Higher temperatures generally no problem. The
electrolytic. type in aluminum will freeze around -30°C. This
could cause an oscillation at output of regulator. At a lower
temperature requirement by many applications the capacitor
should maintain its performance. So as a result, for an
application which regulator junction temperature does not
exceed 25°C, the output capacitor can be reduced by the
The worst case occurs at the lower temperature and
maximum operating currents, the entire circuit and the
electrolytic, should be cooled down to the minimum
temperature. The minimum of 0.6 volts required at the input
of regulator above the output to keep the power dissipation
and die heating to its minimum. After the value for the
capacitor has been determined for actual use, the value
should be doubled.
Rev. 10/24/00
SPX2931
TYPICAL CHARACTERISTICS
QUIESCENT CURRENT
VIN = 14V
REFERENCE VOLTAGE
LM2931CT ADJUSTABLE
QUIESCENT CURRENT
25
30
25
20
15
10
1.30
1.28
1.26
20
15
1.24
1.22
1.20
1.18
1.16
10
~
~
~
~
3
2
IO = 50mA
IO = 0mA
1.14
1.12
1.10
5
0
1
0
-40
0
40
80
120
0
30
60
90
0
3
6
9
12 15 18 21 24
JUNCTION TEMPERATURE (ºC)
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
PEAK OUTPUT CURRENT
DROPOUT VOLTAGE
DROPOUT VOLTAGE
800
500
0.6
0.5
0.6
0.5
TJ = 25ºC
0.4
0.3
IO = 100mA
0.4
0.3
0.2
400
300
200
100
TJ = 85ºC
TJ = -40ºC
IO = 50mA
IO = 10mA
0.2
0.1
0.1
0
0
0
0
40
80
120
0
50
100
0
10
20
30
JUNCTION TEMPERATURE (ºC)
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
MAXIMUM POWER DISSIPATION (TO-220)
MAXIMUM POWER DISSIPATION (TO-92)
LOW VOLTAGE BEHAVIOR
6.0
5.0
4.0
22
20
18
16
14
12
1.0
INFINITE HEAT SINK
LM2931 5.0
IO = 100 mA
0.9
0.8
0.7
0.125" LEAD LENGTH
FROM PC BOARD
0.6
0.5
10 ºC/W HEAT SINK
NO HEAT SINK
10
3.0
2.0
0.4
0.3
8
6
0.4" LENGTH
FROMPC BOARD
0.2
0.1
4
2
0
1.0
0
2.0
3.0
4.0
5.0
6.0
0
10 20 30 40 50 60 70 80 90
0
10 20 30 40 50 60 70 80 90 100
INPUT VOLTAGE (V)
AMBIENT TEMPERATURE (ºC)
AMBIENT TEMPERATURE (ºC)
MAXIMUM POWER DISSIPATION (SO-
8)
MAXIMUM POWER DISSIPATION
OPERATION DURING LOAD DUMP
1.0
0.9
0.8
0.7
0.6
0.5
0.4
10
70
60
50
40
30
20
LM2931-
5.0
I
O = 10mA
1
10
0
~
~
~
~
CO = 100µF
L = 500W
R
6
4
2
0
0.3
0.2
0.1
0
0.1
0.01
-2
-100
0
5
10
15
20
25
30
0
100
300 400
500
200
0
30
60
90
120
150
AMBIENT TEMPERATURE (ºC)
FREQUENCY (Hz)
TIME (ms)
Rev. 10/24/00
SPX2931
TYPICAL APPLICATIONS
SPX2931 Fixed Output
SPX2931
SCHEMATIC DIAGRAM
Rev. 10/24/00
SPX2931
ORDERING INFORMATION
Ordering No.
SPX2931N
Precision
3%
3%
3%
3%
2%
2%
2%
2%
5%
5%
5%
5%
3%
3%
3%
3%
2%
2%
2%
2%
5%
5%
5%
5%
3%
3%
3%
3%
2%
2%
2%
2%
5%
5%
5%
5%
3%
3%
3%
3%
2%
2%
2%
2%
5%
5%
5%
5%
Output Voltage
Adj
Packages
3 Lead TO-92
3 Lead TO-92
3 Lead TO-92
3 Lead TO-92
3 Lead TO-92
3 Lead TO-92
3 Lead TO-92
3 Lead TO-92
3 Lead TO-92
3 Lead TO-92
3 Lead TO-92
3 Lead TO-92
8 Lead SOIC
3.0V
3.3V
3.5V
Adj
SPX2931N-3.0
SPX2931N-3.3
SPX2931N-3.5
SPX2931AN
3.0V
3.3V
3.5V
Adj
SPX2931AN-3.0
SPX2931AN-3.3
SPX2931AN-3.5
SPX2931CN
3.0V
3.3V
3.5V
Adj
SPX2931CN-3.0
SPX2931CN-3.3
SPX2931CN-3.5
SPX2931S
3.0V
3.3V
3.5V
Adj
8 Lead SOIC
SPX2931S-3.0
SPX2931S-3.3
SPX2931S-3.5
SPX2391AS
8 Lead SOIC
8 Lead SOIC
8 Lead SOIC
3.0V
3.3V
3.5V
Adj
8 Lead SOIC
SPX2391AS-3.0
SPX2391AS-3.3
SPX2391AS-3.5
SPX2931CS
8 Lead SOIC
8 Lead SOIC
8 Lead SOIC
3.0V
3.3V
3.5V
Adj
8 Lead SOIC
SPX2931CS-3.0
SPX2931CS-3.3
SPX2931CS-3.5
SPX2931U
8 Lead SOIC
8 Lead SOIC
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead SOT-89
3 Lead SOT-89
3 Lead SOT-89
3 Lead SOT-89
3 Lead SOT-89
3 Lead SOT-89
3 Lead SOT-89
3 Lead SOT-89
3 Lead SOT-89
3 Lead SOT-89
3 Lead SOT-89
3 Lead SOT-89
3.0V
3.3V
3.5V
Adj
SPX2931U-3.0
SPX2931U-3.3
SPX2931U-3.5
SPX2931AU
3.0V
3.3V
3.5V
Adj
SPX2931AU-3.0
SPX2931AU-3.3
SPX2931AU-3.5
SPX2931CU
3.0V
3.3V
3.5V
Adj
SPX2931CU-3.0
SPX2931CU-3.3
SPX2931CU-3.5
SPX2931M1
3.0V
3.3V
3.5V
Adj
SPX2931M1-3.0
SPX2931M1-3.3
SPX2931M1-3.5
SPX2931AM1
SPX2931AM1-3.0
SPX2931AM1-3.3
SPX2931AM1-3.5
SPX2931CM1
SPX2931CM1-3.0
SPX2931CM1-3.3
SPX2931CM1-3.5
3.0V
3.3V
3.5V
Adj
3.0V
3.3V
3.5V
Rev. 10/24/00
SPX2931
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and Main Offices:
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 935-7600
FAX: (408) 934-7500
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
hereing; neither does it convey any license under its patent rights nor the rights of others.
Rev. 10/24/00
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