Datasheet SPX2815AR-3.3, SPX2815AR-5.0, SPX2815AT, SPX2815AT-1.5, SPX2815AT-2.5 Datasheet (Sipex Corporation)

1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output,

SPX2815

Fast Response

FEATURES

Adjustable Output Down To 1.2V

•

Fixed Output Voltages 1.5V, 2.5V, 3.3V, 5.0V

•

Output Current of 1.5A

•

Low Dropout Voltage 1.1V Typ.

•

Extremely Tight Load And Line Regulation

•

Current & Thermal Limiting

•

Standard 3-Terminal Low Cost TO-220, TO-263 & TO-252

•

Similar To Industry Standard LT1086/LT1586

•

PRODUCT DESCRIPTION

The SPX2815 is a low power 1.5A adjustable and fixed voltage regulators that are very easy to use. It requires only 2 external resistors to set the output voltage for adjustable version. The SPX2815 are designed for low voltage applications that offers lower dropout voltage and faster transient response. This device is an excellent choice for use in powering low voltage microprocessor that require a lower dropout, faster transient response to regulate from +2.5V to 3.8V supplies and as a post regulator for switching supplies applications. The SPX2815 features low dropout of a maximum 1.2V.

The SPX2815 offers over current limit and protection against over-current faults, reversed input polarity, reversed load insertion, and positive and negative transient voltage. The I

The SPX2815 are offered in a 3-pin TO-220, TO-263 & TO-252 packages compatible with other 3 terminal regulators. For a 3A low dropout regulator refer to the SPX1587 data sheet.

of this device flows into the load, which increases efficiency.

Q

APPLICATIONS

Powering VGA & Sound Card

•

Power PCSupplies

•

SMPS Post-Regulator

•

High Efficiency “Green” Computer Systems

•

High Efficiency Linear Power Supplies

•

Portable Instrumentation

•

Constant Current Regulators

•

Adjustable Power Supplies

•

Battery charger

•

TO-263-3 (T)

ADJ/GND

PIN CONNECTIONS

TO-220-3 (U)

SPX2815

ADJ/GND

SPX2815

1

Front View

1

2

V

OUT

Top View

3

V

IN

23

V

OUT

TO-252 (R)

SPX2815

321

ADJ/GND

V

IN

OUT

Front View

VINV

Rev. 10/20/00

SPX2815

ABSOLUTE MAXIMUM RATINGS

Lead Temp. (Soldering, 10 Seconds) .............................. 300°C Maximum Input Supply Voltage .......................... 10V

Storage Temperature Range ............................ -65° to +150°C Input to Output Voltage Differential .................... 10V

Operating Junction Temperature Range ......................

SPX2815 Control Section.......................... -45°C +125°C

SPX2815 Power Transistor.........................-45°C +150°C

ELECTRICAL CHARACTERISTICS

PARAMETER

1.5V Version

Output Voltage (Note 2)

2.5V Version

Output Voltage (Note 2)

3.3V Version

Output Voltage (Note 2)

5.0V Version

Output Voltage (Note 2)

All Voltage Options

Reference Voltage (V

Min. Load Current

Line Regulation (∆V

Load Regulation(∆V

Dropout Voltage

Current Limit I

Long Term Stability

Thermal Regulation (∆V Temperature Stability (∆V Output Noise, RMS

Thermal Resistance

OUT(MAX

OUT

REF

(Note 3)

REF(VIN

REF(IOUT

)

(Pwr))

(T))

SPX2815-1.5V, 0 ≤I

SPX2815-2.5V,0 ≤I

SPX2815-3.3V, 0 ≤I

SPX2815-5.0V, 0 ≤I

V

)

))

≤

IN

1.5V≤ (V

2.75V≤V

V

≤

IN

10mA≤I

))

(Note 3)

0≤I

OUT

V

∆

REF

I VIN=7V

1.4V≤ (V

TA=125°C, 1000 Hrs.

TA=25°C, 20 ms pulse

0.25 %

10Hz to 10khz T

TO-220 Junction to Tab Junction to Ambient DD Package Junction to Tab Junction to Ambient

CONDITIONS Typ

7V, P≤ P

IN -VOUT

7V, I

≤

IN

7V, I

OUT

1.5A, (V

≤

OUT

1.5A, V

≤

=1% I

IN- VOUT

The Bold specifications apply to the full operating temperature range. Note 1: Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 2: Fixed Version Only Note 3: Adjustable Version Only

(NOTE 1) at I

1.5A, 2.75V≤V

≤

OUT

1.5A, 3.5V≤V

≤

OUT

1.5A, 4.75V≤V

≤

OUT

1.5A, 5.5V≤V

≤

OUT

MAX

)≤5.75V, 10mA≤I )≤5.75V

=10mA, TJ=25°C (Note 3)

OUT

=0mA, TJ=25°C (Note 2)

IN-VOUT

=7V, TJ=25°C (Note 2)

IN

OUT

) (Note3)

=25°C

A

OUT

)=3V, TJ=25°C

=1.5A (Note 3)

(Note 2)

1.5A

≤

= 10mA, Ta=25°C, unless otherwise specified.

OUT

SPX2815A

Min Max

IN

1.5A

≤

7V

≤

IN

7V

≤

7V

≤

IN

7V

≤

1.5

2.5

3.3

5.0

1.250 1.225 1.270

5 10 10

0.005 0.2 0.2 %

0.05 0.3 0.3 %

1.1

2.5

0.3

(Note 2)

0.01 0.020 0.020 %/W

0.003 % V

1.485

1.470

2.475

2.450

3.270

3.240

4.95

4.90

3.0

1.7

1 1 %

1.515

1.530

2.525

2.550

3.330

3.360

5.05

5.10

1.2

60

3.0 60

SPX2815

Min Max

1.470

1.455

2.450

2.425

3.230

3.201

4.900

4.850

1.225

1.7

3.0

1.530

1.545

2.550

2.575

3.370

3.399

5.100

5.150

1.270

1.2

A

60

3.0 60

Units

V

mA

V

O

C/W

°

C/W

°

Rev. 10/20/00

SPX2815

APPLICATION HINTS

The SPX2815 incorporates protection against over-current faults, reversed load insertion, over temperature operation, and positive and negative transient voltage. However, the use of an output capacitor is required in order to insure the stability and the performances.

Reducing parasitic resistance and inductance

One solution to minimize parasitic resistance and inductance is to connect in parallel capacitors. This arrangement will improve the transient response of the power supply if your system requires rapidly changing current load condition.

Stability

The output capacitor is part of the regulator’s frequency compensation system. Either a 22µF aluminum electrolytic capacitor or a 10µF solid tantalum capacitor between the output terminal and ground guarantees stable operation for all operating conditions. However, in order to minimize overshoot and undershoot, and therefore optimize the design, please refer to the section ‘Ripple Rejection’.

Ripple Rejection

Ripple rejection can be improved by adding a capacitor between the ADJ pin and ground. When ADJ pin bypassing is used, the value of the output capacitor required increases to its maximum (22µF for an aluminum electrolytic capacitor, or 10µF for a solid tantalum capacitor). If the ADJ pin is not bypass, the value of the output capacitor can be lowered to 100µF for an electrolytic aluminum capacitor or 4.7µF for a solid tantalum capacitor. However the value of the ADJ-bypass capacitor should be chosen with respect to the following equation: C = 1 / ( 6.28 * F

* R1 )

R

Where C = value of the capacitor in Farads (select an equal or larger standard value), F R

= ripple frequency in Hz,

R

= value of resistor R1 in Ohms.

1

If an ADJ-bypass capacitor is use, the amplitude of the output ripple will be independent of the output voltage. If an ADJbypass 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

= Reference Voltage

REF

Thermal Consideration

Although the SPX2815 offers some limiting circuitry for overload conditions, it is necessary not to exceed the maximum junction temperature, and therefore to be careful about thermal resistance. The heat flow will follow the lowest resistance path, which is the Junction-to-case thermal resistance. In order to insure the best thermal flow of the component, a proper mounting is required. Note that the case of the device is electrically connected to the output. In case the case has to be electrically isolated, a thermally conductive spacer can be used. However do not forget to consider its contribution to thermal resistance.

Assuming: V

= 10V, V

IN

θ

Heatsink Case

= 5V, I

OUT

= 6°C/W, θ

= 1.5A, TA = 50°C/W,

OUT

Heatsink Case

= 0.5°C/W, θ JC = 3°C/W

Power dissipation under this condition P

= (VIN – V

D

OUT

) * I

= 7.5W

OUT

Junction Temperature T

= TA + PD * (θ

J

Case – HS

+ θ HS + θ JC)

For Control & Power Sections T

= 50 + 7.5*(0.5+6=3) = 121.25°C

J

121.25°C < T

for Control & Power Sections.

J (max)

In both case reliable operation is insured by adequate junction temperature.

Rev. 10/20/00

SPX2815

Basic Adjustable Regulator

V

OUT

SPX2815

I

ADJ

50µA

V

REF

V

= V

OUT

* ( 1 + R2/R1) + I

REF

ADJ

* R

2

V

OUT

R

1

R

2

Fig.2 Basic Adjustable Regulator

Output Voltage

Consider Figure 2. The resistance R

generates a constant

1

current flow, normally the specified load current of 10mA. This current will go through the resistance R output voltage. The current I

is very small and constant.

ADJ

to set the overall

2

Therefore its contribution to the overall output voltage is very small and can generally be ignored.

Load Regulation

Parasitic line resistance can degrade load regulation. In order not to affect the behavior of the regulator, it is best to connect directly the R

resistance from the resistor divider to the case,

1

and not to the load. For the same reason, it is best to connect the resistor R

to the Negative side of the load.

2

R

Parasitic Line

P

V

OUT

SPX2815

Resistance

Connect R1 to

Case of Regulator

V

IN

5V

SPX2815

C1

10uF

V

3.3V

C1

10uF

OUT

Basic Fixed Regulator

Output Voltage

The fixed voltage LDO voltage regulators are simple to use regulators since the V

is preset to the specifications. It is

OUT

important however, to provide the proper output capacitance for stability and improvement. For most operating conditions a capacitance of 22uF tantalum or 100uF electrolytic will ensure stability and prevent oscillation.

R

2

Fig.3 Basic Adjustable Regulator

1

R

L

Connect R2 to Load

Rev.10/20/00

SPX2815

TYPICAL APPLICATIONS

V

IN

C

1

Fig. 4 1.5A Current output Regulator

(Note A)

V

IN

*C1 improves ripple rejection. Xc

should be ~ R

Note A: V

IN(MIN)

+

10µF

at ripple frequency.

1

= (Intended V

Fig. 6 Improving Ripple Rejection

SPX2815

ADJ

IN OUT

SPX2815

ADJ

) + (V

OUT

DROPOUT (MAX)

365Ω

)

OUT

R

1%

V

LOAD

IN

R

1

V

OUT

= V

IN

C

1

(1 + R2 ) + I

REF

R

1

SPX2815

ADJ

ADJ R2

OUT

R

1

R

2

Fig. 5 Typical Adjustable Regulator

5V

R

1

121Ω

1%

2

+

10µF*

V

OUT

150µF

C

1

V

IN

(Note A)

TTL

Input

Note A: V

IN OUT

SPX2815

+

10µF

1k

IN(MIN)

ADJ

1k

= (Intended V

2N3904

OUT

) + (V

121Ω

1%

365Ω

1%

DROPOUT (MAX)

+

)

Fig.7 5V Regulator with Shutdown

C

5V

100µF

V

OUT

2

Rev. 10/20/00

SPX2815

TYPICAL CHARACTERISTICS

Rev. 10/20/00

SPX2815

PACKAGE DRAWING TO-263-3L (T)

±

0.405

0.005

±

(10.287 0.127)

0.055 (1.397)

0.176

0.050

0.005

±

0.002

(4.470 (1.270

±

0.356 0.005

±

(9.042 0.127)

0.600

(15.24

+

0.025

±

0.635)

0.103 BSC

(2.616)

0.050 (1.270)

+

0.032

0.001

-

+

(0.813 0.025)

-

0.015

(0.381 0.074)

+

-

+

-

0° 8°

0.003

± ±

0.010

0.100

(2.540 0.254)

0.127)

±

0.051)

Rev. 10/20/00

SPX2815

PACKAGE DRAWING TO-220-3L (U)

0.110 ± 0.010

(2.794 ± 0.254)

0.408 ± 0.013

(10.36 ± 0.33)

0.151D ± 0.002

(3.835 D ± 0.051)

0.250 ± 0.010

(6.350 ± 0.254)

0.340 ± 0.010

(8.636 ± 0.254)

0.540 ± 0.015

(13.720 ± 0.381)

0.050 TYP (1.27 TYP)

0.200 ± 0.010

(5.080 ± 0.254)

0.150 MIN (3.81 MIN)

0.410

(10.41)

0.100 ± 0.010

(2.540 ± 0.254)

0.032 ± 0.005

(0.813 ± 0.127)

0.180 ± 0.005

(4.572 ± 0.127)

7o Typ.

0.015 ± 0.010/-0.002 (0.381± 0.254/-0.051)

0.050 ± 0.002

(1.270 ± 0.051)

SEATING PLANE

1.020 ± 0.015

(25.910 ± 0.381)

0.015 ± 0.010/-0.015

(2.667± 0.254/-0.381)

Tapered 1

2 Sides

o

Rev. 10/20/00

SPX2815

PACKAGE DRAWING TO252-3L (R)

E

b

2

4

-C-

21

M

b

3 PLCS

A M

C

e1

D

1

BACK VIEW A-A

.010

TERM 4

-A-

L

2

D

3

b

e

E

1

L

3

L

1

A

1

C

1

NOTES

1. Refer To Applicable Symbol List.

2. Dimensions And Tolerancing Per Ansi Y14.5m - 1982.

3. Lead Dimension Uncontrolled in L

4. Tab Contour Optional Within Dim. b

5. D1 & E1 Establishes A Minimum Mounting Surface for Terminal 4.

6. L is the Termal Length for Soldering.

7. Controlling Dimension: Inch

8. 2 Mils Suggested For Postive Contact At Mounting.

S Y M B O L

A 0.086 0.094 2.184 2.3876

A1 0.035 0.045 0.889 1.143

b 0.025 0.035 0.635 0.8 89

b1 0.300 0.045 7.620 1.1 43

b2 0.205 0.215 5.207 5.4 61 4

c 0.0 18 0.023 0.457 0.5842

c1 0.018 0.023 0.4 57 0.5842

D 0.235 0.245 5.969 6.223

D1 0.170 - 4.318 - 4,5

E 0.250 0.265 6.350 6.731

E1 0.170 - 4.3 18 - 4,5

e

e1

H 0.370 0.410 9.398 10.414

L 0.020 - 0.508 - 6

L1 0.025 0.040 0.635 1.0 16

L2 0.035 0.050 0.889 1.2 70 4

L3 0.045 0.060 1.143 1.5 24 3

-B-

A

SEATING PLANE

H

L

c

8

INCH ES

MIN MAX MIN MAX

0.098

0.180

A

.

3

& L2 And E1 & D

2

1

MM

2.489

4.572

N O T E

Rev. 10/20/00

SPX2815

ORDERING INFORMATION

Ordering No. Precision Output Voltage Packages

SPX2815T SPX2815T-1.5 SPX2815T-2.5 SPX2815T-3.3 SPX2815T-5.0 SPX2815AT SPX2815AT-1.5 SPX2815AT-2.5 SPX2815AT-3.3 SPX2815AT-5.0 SPX2815U SPX2815U-1.5 SPX2815U-2.5 SPX2815U-3.3 SPX2815U-5.0 SPX2815AU SPX2815AU-1.5 SPX2815AU-2.5 SPX2815AU-3.3 SPX2815AU-5.0 SPX2815R SPX2815R-1.5 SPX2815R-2.5 SPX2815R-3.3 SPX2815R-5.0 SPX2815AR SPX2815AR-1.5 SPX2815AR-2.5 SPX2815AR-3.3 SPX2815AR-5.0

2% Adj 3 Lead TO-263 2% 1.5V 3 Lead TO-263 2% 2.5V 3 Lead TO-263 2% 3.0V 3 Lead TO-263 2% 5.0V 3 Lead TO-263 1% Adj 3 Lead TO-263 1% 1.5V 3 Lead TO-263 1% 2.5V 3 Lead TO-263 1% 3.0V 3 Lead TO-263 1% 5.0V 3 Lead TO-263 2% Adj 3 Lead TO-220 2% 1.5V 3 Lead TO-220 2% 2.5V 3 Lead TO-220 2% 3.0V 3 Lead TO-220 2% 5.0V 3 Lead TO-220 1% Adj 3 Lead TO-220 1% 1.5V 3 Lead TO-220 1% 2.5V 3 Lead TO-220 1% 3.0V 3 Lead TO-220 1% 5.0V 3 Lead TO-220 2% Adj 3 Lead TO-252 2% 1.5V 3 Lead TO-252 2% 2.5V 3 Lead TO-252 2% 3.0V 3 Lead TO-252 2% 5.0V 3 Lead TO-252 1% Adj 3 Lead TO-252 1% 1.5V 3 Lead TO-252 1% 2.5V 3 Lead TO-252 1% 3.0V 3 Lead TO-252 1% 5.0V 3 Lead TO-252

SIGNAL PROCESSING EXCELLENCE

Corporation

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. 10/20/00

Datasheet SPX2815AR-3.3, SPX2815AR-5.0, SPX2815AT, SPX2815AT-1.5, SPX2815AT-2.5 Datasheet (Sipex Corporation)

Specifications and Main Features

Frequently Asked Questions

User Manual