Datasheet SPX2931AS-3.0, SPX2931AS-3.3, SPX2931AS-3.5, SPX2931AU, SPX2931AU-3.0 Datasheet (Sipex Corporation)

Rev. 10/24/00

SPX2931

100mA Low Dropout Voltage Regulator

FEATURES

•

3.5V, 3.3V, and 3.0V Versions are Available

•

Reverse Battery Protection

•

Output Current in Excess of 100 mA

•

Short Circuit Protection

•

Input-Output Differential is Less Than 0.6V

•

60V Load Dump Protection

•

Mirror-Image Insertion Protection

•

-20V Reverse Transient Protection

•

Internal Thermal Overload Protection

APPLICATION

•

Available in TO-220, TO-92, SOT-89, and SO-8 Package Types

•

Portable Instrumentation

•

Available as Adjustable with TTL Compatible Switch

•

Radio Control Systems

•

Similar Improved to Industry Standard LM2931

•

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 logic­compatible 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

Bottom View

TO-92 (N)

SPX2931

SOT-89 (M1)

Top View

1

2

3

V

IN

GND V

OUT

132

GND

V

IN

V

OUT

Top View

2

1

3

4

8

7

6

5

SPX2931

8-Pin Surface Mount (S)

Fixed Output

V

OUT

GND

GND

BYP

ON/OFF

GND

GND

V

IN

Front View

TO-220-3 (U)

Fixed

SPX2931

1

23

1. V

IN

2. GND

3. V

OUT

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

S

= 14V, T

A

= 25°C, IO = 10 mA, C2 = 100 µF, unless otherwise specified.

( Note 1)

Parameter Conditions SPX2931A SPX2931 Units

Min Typ Max Min

Typ Max

3.0 Volt Version

SPX2931A-3 SPX2931-3

Output Voltage

6V<V

IN

< 26V,

I

O

= 100 mA Over Temp.

2.94

2.88

3.00

3.00

3.06

3.12

2.91

2.85

3.00

3.00

3.09

3.15

V

V

3.3 Volt Version

SPX2931A-3.3 SPX2931-3.3

Output Voltage

6V < V

IN

< 26V,

I

O

= 100 mA Over Temp.

3.23

3.20

3.30

3.30

3.36

3.39

3.20

3.16

3.30

3.30

3.39

3.43

V

V

5 Volt Version

SPX2931A-5 SPX2931-5

Output Voltage

6V <V

IN

< 26V,

I

O

=100 mA Over Temp.

4.81

4.75

5.00 5.19

5.25

4.75

4.5

5.00 5.25

5.5

V

V

All Voltage Options

Long Term Stability 20 20 mV/1000

Line Regulation 9V < V

IN

< 16V

6V < V

IN

< 26V,

2.0

4.0

10
30

4.0 30 mV

Load Regulation 5 mA < IO < 100 mA 14 50 14 50 mV

Dropout Voltage

IO=10 mA
I

O

=50 mA

I

O

=100 mA

0.05

0.07

0.3

0.2

0.1

0.6

0.05

0.07

0.3

0.2

0.1

0.6

V
V
V

Quiescent Current

IO < 10 mA, 6V < V

IN

< 26V

-40°C < Tj < 85°C
I

O

= 100 mA, V

IN

= 14V,

T

J

= 25°C

0.4

15

1.0 0.4

15

1.0

mA

mA

Maximum Operational Input
Voltage

26 33 26 33 V

Maximum Line Transient

R

L

= 500Ω, VO<5.5V, 100ms

60 70 50 70 V

Reverse Polarity Input
Voltage, DC

V

O

> -0.3V, RL = 500Ω

-15 -30 -15 30 V

Reverse Polarity Input
Voltage, Transient

1% Duty Cycle, τ < 100ms,
R

L

= 500Ω

-50 -80 -50 -80 V

Output Noise Voltage

10Hz-100kHz, C

OUT

=100µF

500 500

µ

Vrms

Ripple Rejection FO = 120Hz 80 80 dB

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

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
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.

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

factor of two over the value needed for the entire

temperature range.

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.
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.

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

INPUT OUTPUT DIFFERENTIAL (V)

0.6

0.5

0.2

0

JUNCTION TEMPERATURE (ºC)

QUIESCENT CURRENT (mA)

25

3

2

0

-40 0 80 120

JUNCTION TEMPERATURE (ºC)

0.4

0.3

0.1

0

40 80 120

DROPOUT VOLTAGE

QUIESCENT CURRENT

6.0

3.0

2.0

1.0

2.0 3.0 4.0 5.0 6.0

INPUT VOLTAGE (V)

LOW VOLTAGE BEHAVIOR

OUTPUT VOLTAGE (V)

1.0

0.8

0.6

0.5

0 5 10 15 20 25 30

AMBIENT TEMPERATURE (ºC)

MAXIMUM POWER DISSIPATION (SO-

8)

POWER DISSIPATION (W)

0.9

0.7

0.4

10

1

0.1

0 30 60 90 120 150

FREQUENCY (Hz)

MAXIMUM POWER DISSIPATION

OUTPUT IMPEDANCE (

Ω)

Ω)Ω)

Ω)

0.01

INPUT OUTPUT DIFFERENTIAL (V)

0.4

0.2

OUTPUT CURRENT (mA)

QUIESCENT CURRENT (mA)

0

0

OUTPUT CURRENT (mA)

0.3

0.1

0

DROPOUT VOLTAGE

QUIESCENT CURRENT

22

20

6

0

010

20

40 70 80 100

AMBIENT TEMPERATURE (ºC)

MAXIMUM POWER DISSIPATION (TO-220)

POWER DISSIPATION (W)

REFERENCE VOLTAGE (V)

1.10
18 21

OUTPUT VOLTAGE (V)

REFERENCE VOLTAGE

OUTPUT CURRENT (mA)

800

500

0

INPUT VOLTAGE (V)

200

100

10 20

PEAK OUTPUT CURRENT

1.0

020405060

AMBIENT TEMPERATURE (ºC)

MAXIMUM POWER DISSIPATION (TO-92)

POWER DISSIPATION (W)

30 60 90

5

10

15

20

25

30

0 50 100

1.12

1.18

1.22

1.26

1.30

912

300

400

0.9

0.8

0.7

0.6

0.5

0.4

OPERATION DURING LOAD DUMP

TIME (ms)

OUTPUT

VOLTAGE (V)

400

200

100-100

30

10

0

6

4

-2

10

15

20

15

30

18

2
0

0 300

1

~
~

~

~

40

IO = 0mA

IO = 50mA

VIN = 14V

24630

1.14

1.16

1.24

1.20

1.28

LM2931CT ADJUSTABLE

IO = 100mA

IO = 50mA

IO = 10mA

0.5

0.6

0

TJ = 25ºC

TJ = 85ºC

TJ = -40ºC

4.0

5.0

LM2931 5.0
IO = 100 mA

INFINITE HEAT SINK

10 ºC/W HEAT SINK

NO HEAT SINK

14

16

12

10

8

4

2

30 50 60 90

0.1

0.3

0.2

0

10 30 70 80 90

0.125" LEAD LENGTH
FROM PC BOARD

0.4" LENGTH

FROMPC BOARD

LM2931-

5.0

I

O

= 10mA

0.3

0.2

0.1

0

~

~

20

40

50

60

70

500

OUTPUT

VOLTAGE (V)

~

~

CO = 100µF
R

L

= 500W

Rev. 10/24/00

SPX2931

TYPICAL APPLICATIONS

SCHEMATIC DIAGRAM

AS2931

AS2931 Fixed Output

SPX2931

SPX2931 Fixed Output

Rev. 10/24/00

SPX2931

ORDERING INFORMATION

Ordering No. Precision Output Voltage Packages

SPX2931N

3% Adj 3 Lead TO-92

SPX2931N-3.0

3% 3.0V 3 Lead TO-92

SPX2931N-3.3

3% 3.3V 3 Lead TO-92

SPX2931N-3.5

3% 3.5V 3 Lead TO-92

SPX2931AN

2% Adj 3 Lead TO-92

SPX2931AN-3.0

2% 3.0V 3 Lead TO-92

SPX2931AN-3.3

2% 3.3V 3 Lead TO-92

SPX2931AN-3.5

2% 3.5V 3 Lead TO-92

SPX2931CN

5% Adj 3 Lead TO-92

SPX2931CN-3.0

5% 3.0V 3 Lead TO-92

SPX2931CN-3.3

5% 3.3V 3 Lead TO-92

SPX2931CN-3.5

5% 3.5V 3 Lead TO-92

SPX2931S

3% Adj 8 Lead SOIC

SPX2931S-3.0

3% 3.0V 8 Lead SOIC

SPX2931S-3.3

3% 3.3V 8 Lead SOIC

SPX2931S-3.5

3% 3.5V 8 Lead SOIC

SPX2391AS

2% Adj 8 Lead SOIC

SPX2391AS-3.0

2% 3.0V 8 Lead SOIC

SPX2391AS-3.3

2% 3.3V 8 Lead SOIC

SPX2391AS-3.5

2% 3.5V 8 Lead SOIC

SPX2931CS

5% Adj 8 Lead SOIC

SPX2931CS-3.0

5% 3.0V 8 Lead SOIC

SPX2931CS-3.3

5% 3.3V 8 Lead SOIC

SPX2931CS-3.5

5% 3.5V 8 Lead SOIC

SPX2931U

3% Adj 3 Lead TO-220

SPX2931U-3.0

3% 3.0V 3 Lead TO-220

SPX2931U-3.3

3% 3.3V 3 Lead TO-220

SPX2931U-3.5

3% 3.5V 3 Lead TO-220

SPX2931AU

2% Adj 3 Lead TO-220

SPX2931AU-3.0

2% 3.0V 3 Lead TO-220

SPX2931AU-3.3

2% 3.3V 3 Lead TO-220

SPX2931AU-3.5

2% 3.5V 3 Lead TO-220

SPX2931CU

5% Adj 3 Lead TO-220

SPX2931CU-3.0

5% 3.0V 3 Lead TO-220

SPX2931CU-3.3

5% 3.3V 3 Lead TO-220

SPX2931CU-3.5

5% 3.5V 3 Lead TO-220

SPX2931M1

3% Adj 3 Lead SOT-89

SPX2931M1-3.0

3% 3.0V 3 Lead SOT-89

SPX2931M1-3.3

3% 3.3V 3 Lead SOT-89

SPX2931M1-3.5

3% 3.5V 3 Lead SOT-89

SPX2931AM1

2% Adj 3 Lead SOT-89

SPX2931AM1-3.0

2% 3.0V 3 Lead SOT-89

SPX2931AM1-3.3

2% 3.3V 3 Lead SOT-89

SPX2931AM1-3.5

2% 3.5V 3 Lead SOT-89

SPX2931CM1

5% Adj 3 Lead SOT-89

SPX2931CM1-3.0

5% 3.0V 3 Lead SOT-89

SPX2931CM1-3.3

5% 3.3V 3 Lead SOT-89

SPX2931CM1-3.5

5% 3.5V 3 Lead SOT-89

Rev. 10/24/00

SPX2931

SIGNAL PROCESSING EXCELLENCE

Sipex Corporation

Headquarters and Main Offices:

22 Linnell Circle
Billerica, MA 01821
TEL: [phone]
FAX: [phone]
e-mail: [e-mail]

233 South Hillview Drive
Milpitas, CA 95035
TEL: [phone]
FAX: [phone]

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.

Corporation