SPX1202M3-L-2.5/TR_技术文档

®

SPX1202

600mA Low Dropout Linear Regulator

FEATURES

APPLICATIONS

■ Guaranteed 600mA Output

■ SCSI-II Active Terminator

■ Three Terminal Adjustable or Fixed

■ Portable/ Palm Top / Notebook

2.5V, 3V and 3.3V

Computers

■ Low Quiescent Current

■ Battery Chargers

■ 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

■ 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

-

V_OUT

I_CL

AMP

V_REF

Thermal Limit

ADJ/GND

~

I_ADJ50µA

–

I _TL

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

1

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 V_IN=V_OUT+ 1.5V, T_A= 25°C, C_IN= C_OUT= 10µF, unless otherwise specified. Limits in Boldface applies over the

full operating temperature range.

PARAMETER

2.5V Version

Output Voltage

CONDITIONS

TYP

MIN

MAX

UNITS

I_OUT= 10mA, V_IN= 5.00V

2.475

2.500

2.525

V

0 ≤ I_OUT≤ 600mA, 4.50V ≤ V_IN≤ 10V

2.450

2.550

3.0V Version

Output Voltage

I_OUT= 10mA, V_IN= 5.00V

0 ≤ I_OUT≤ 600mA, 4.50V ≤ V_IN≤ 10V

2.970

2.940

3.000

3.300

1.250

3.030

3.060

V

3.3V Version

Output Voltage

I_OUT= 10mA, V_IN= 5.00V

0 ≤ I_OUT≤ 600mA, 4.50V ≤ V_IN≤ 10V

3.267

3.234

3.333

3.366

All Output Options

Reference Voltage

I_OUT=10mA, (V_IN- V_OUT) = 2V

10≤I_OUT≤ 600mA, 1.4V≤(V_IN-V_OUT)≤ 10V

1.238

1.225

1.262

1.270

V

%

Output Voltage

(Note 1)

0.05

Temperature Stability

Line Regulation

4.50V≤V_IN≤ 12V,V_OUT=3.00,I_OUT=0

4.80V≤V_IN≤ 12V,V_OUT=3.30,I_OUT=0

6.50V≤V_IN≤ 12V,V_OUT=5.00,I_OUT=0

1.00

7.00

10.00

mV

Load Regulation

0≤I_OUT≤ 600mA,V_IN=4.50V,V_OUT=3.00

0≤I_OUT≤ 600mA,V_IN=4.80V,V_OUT=3.30

0≤I_OUT≤ 600mA,V_IN=6.50V,V_OUT=5.0

1.00

12.00

15.00

mV

V

Dropout Voltage

(Note 2)

I_L=100mA

I_L=600mA

1.00

1.05

1.10

1.15

Quiescent Current

Adjust Pin Current

Current Limit

4.25V≤V_IN≤ 6.5V

5.00

50

10.00

mA

µA

(V_IN-V_OUT)=5V

.850

0.01

60

1.0

0.1

75

A

Thermal Regulation

Ripple Rejection

25°C, 30mS Pulse

%/W

dB

f_RIPPLE=120Hz, (V_IN-V_OUT)=3V,

V_RIPPLE=1V_PP

Long Term Stability

RMS Output Noise

125°C, 1000Hrs

0.03

0.003

15

%

% of V_OUT, 10Hz≤f≤10kHz

Junction to Case, at tab

Thermal Resistance

°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

very low values of programmed output voltage, the minimum input supply voltage of 2V ( 2.3V over temperature) must be taken into account.

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.

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

2

TYPICAL PERFORMANCE CHARACTERISTICS

Line Regulation at 25°C

3.320

3.315

3.310

3.305

3.300

3.295

3.290

3.285

3.280

Series 1

3.330

Series 2

3.320

3.310

3.300

4.8

9.8

Vin (V)

14.8

10

100

1000

Output Current (mA)

Figure 1. Load Regulation for SPX1202M3-3.3;

Figure 2. Line Regulation for SPX1202M3-3.3;

V_IN=4.8V, C_OUT=2.2µF

V_IN=4.8V to 16V, C_OUT=2.2µF

Current Limit VS Temp

2.00

1.3

1.2

1.1

1.0

0.9

Series 1

Series 2

1.50

1.00

0.50

0.00

100

200

300

400

500

600

700

800

900 1000

-50

-25

0

25

50

75 100 125

Output Current (mA)

Temp (°C)

Figure 3. Dropout Voltage vs Output Current for

SPX1202M3-3.3; V_IN=4.89V, C_OUT=2.2µF

Figure 4. Current Limit for SP1202M3-3.3; V_IN=4.8V,

C_IN=C_OUT=1.0µF, I_OUTpulsed from 10mA to Current

Limit

3.340

Series 1

Series 2

SCOPE TRACING MISSING

2.320

3.300

3.280

3.260

3.240

-50

-30 -10

10

30

50

70

90 110 130

Temp (°C)

Figure 5. Current Limit for SPX1202M3-3.3, Output

Voltage Deviation with I_OUT=10mA to 1A Step.

Figure 6. V_OUTvs Temperature I_OUTpilsed from 10mA to

Current Limit

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

3

APPLICATION INFORMATION

50 X 50mm

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

largervalue ofoutput capacitance (up to100µF)

can improve the load transient response.

35 X 17mm

16 X 10mm

Figure 7. Substrate Layout for SOT-223

in the application can effect the thermal resis-

tance of the SPX1202. The actual thermal resis-

tance can be determined with experimentation.

SOLDERING METHODS

The SPX1202 SOT-223 package is designed to

be compatible with infrared reflow or vapor-

phase reflow soldering techniques. During sol-

dering, 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.

SPX1202 power dissipation is calculated as

follows:

P_D= (V_IN- 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 tem-

perature range

T_J= T_AMBIENT(max) + P_D* (Thermal Resistance)

(Junction-to-ambient)

Maximum junction temperature must not ex-

ceed 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

beloweredto10µFforanelectrolyticaluminum

capacitor or 2.2µF for a solid tantalum capacitor

(Fig 10).

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

activatedat>144°Canddeactiviatedat<137°C.

However the value of the ADJ-bypass capacitor

should be chosen with respect to the following

equation:

C = 1 / ( 6.28 * F_R* R₁)

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 sub-

strate. Refer to table 1 for the results of the

experiment.

Where C = value of the capacitor in Farads

(select an equal or larger standard value),

F = ripple frequency in Hz,

R^R= value of resistor R₁in Ohms.

If an ADJ-¹bypass capacitor is used, the ampli-

The thermal interaction from other components

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

4

tude of the output ripple will be independent of

the output voltage. If an ADJ-bypass capacitor

isnotused,theoutputripplewillbeproportional

to the ratio of the output voltage to the reference

voltage:

The output of the adjustable regulator can be set

to any voltage between 1.25V and 15V. The

value of V

can be quickly approximated

using the fo^Orm^UTula. (Figure 9)

V_OUT=1.25 *(R₁+ R₂)/R₁.

M = V_OUT/ V_REF

A small correction to this formula is required

depending on the values of resistors R1 and R2,

sinceadjustablepincurrent(approx50µA)flows

through R2. When I_ADJis taken into account, the

formula becomes

Where M = multiplier for the ripple seen when

the ADJ pin is optimally bypassed.

V

_REF=1.25V

Output Voltage

V_OUT= V_REF(1+ (R₂/R₁)) + I_ADJ* R₂,

where V_REF=1.25V.

PC BOARD

AREA mm²

TOPSIDE COPPER BACKSIDE COPPER

THERMAL RESISTANCE

JUNCTION TO AMBIENT

°C/W

AREA mm²

2500

1600

2500

1600

900

2500

1250

950

2500

1800

600

1250

915

600

2500

0

1600

0

900

0

46

47

49

51

53

55

58

59

67

72

85

240

900

Table 1

TYPICAL APPLICATIONS

V _IN

V_IN

V_OUT

SPX1202

IN

OUT

IN

+

4.7µF

C₁

C₂

C ₂

C₁

4.7µF

V_REF

R₁

R₂

ADJ

I_ADJ

50µA

ADJ

R₁

I_OUT

V_REF

R₁

LOAD

V_OUT= V

) +I

_ADJR ₂

_REF(1+R ₂/R₁

I_OUT

=

Figure 8. 600mA Current Source

Figure 9. Typical Adjustable Regulator

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

5

SPX1202

(Note A)

V _IN

5V

OUT

V_IN

IN

5V

IN

OUT

V_OUT

(Note A)

+

1

kΩ

1%

4.7µF

ADJ

R₁

+

4.7µF

1kΩ,

1%

10µF

1k

TTL

Input

2N3904

10µF

330Ω

1%

R₂

1k

+

C₁

10µF*

*C ₁improves ripple rejection.

330Ω

1%

Z_Cshould be ~ R1 at ripple frequency

Note A: V_IN(MIN)= (Intended V_OUT) + (V

)

DROPOUT (MAX)

) + (V DROPOUT (MAX)

V = (Intended V_OUT

IN(MIN)

)

Note A:

Figure 10. Improving Ripple Rejection

Figure 11. 5V Regulator with Shutdown

LAYOUT CONSIDERATIONS

Parasiticlineresistancecandegradeloadregulation. Inordernottoaffectthebehavioroftheregulator,

it is best to connect R₁to the case as illustrated in Figure 12. For the same reason, R₂should be

connected to the negative side of the load.

R_PParasitic Line

Resistance

V_IN

V_OUT

SPX1202

Connect R₁to

Case of Regulator

ADJ

R ₁

R _L

R ₂

to Load

Connect R₂

Figure 12. Recommended Connections for Best Results

PACKAGE PINOUTS

SOT-223 (M3)

TO-220-3 (U)

TO-263-3 (T)

TO-252 (R)

1

2

3

1

2

3

2

1

3

1

2

3

ADJ/GND

V_OUT

V_IN

ADJ/GND

V_OUT

V_IN

Top View

ADJ/GND

V_OUT

V_IN

Front View

Top View

ADJ/GND

V_OUT

V_IN

Front View

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

6

PACKAGE: 3 PIN SOT-223

C

D

b2

C

N

C

E

See detail

A

E1

A

A1

H

1

B

GAUGE

PLANE

e

b

SEATING

PLANE

L

0

C

b

3 PIN SOT-223

JEDEC TO-261

(AA) Variation

Dimensions in (mm)

MIN NOM MAX

WITH PLATING

c

A

-

1.80

0.10

0.02

A1

1.50 1.60 1.70

A2

b

Section B-B

0.66 0.76

2.90 3.00

0.84

3.10

BASE METAL

b2

c

0.23

6.30

0.30

0.35

6.70

6.50

D

c

6.70

3.30

7.00 7.30

3.50 3.70

E

E1

e

b2

2.30 BASIC

Section C-C

e1

4.60 BASIC

L

ø

0.75

0º

-

10º

3 PIN SOT-223

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

7

PACKAGE: 3 PIN TO-252

GAUGE PLANE

c

C

SEATING PLANE

c

L

A1

L2

O

(L1)

b

E1

WITH PLATING

E1/2

c

D1

BASE METAL

CONTACT AREA

3 PIN TO-252

JEDEC TO-252

(AA) Variation

Dimensions in inches

MIN NOM MAX

-

.005

.024

A1

c

.018

-

.205

.170

-

D1

E1

H

-

.370

-

.410

.070

.055 .060

.108 REF

.020 BSC

L

L1

3 PIN TO-252

L2

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

8

PACKAGE: 3 PIN TO-220

A

E

B

E/2

E2

SEATING

PLANE

A

øP

Q

A1

H1

D

D1

CHAMFER

OPTIONAL

L1

1

D

C

L

b

A

e

C

e1

A2

3 PIN TO-220

JEDEC TO-220

(AB) Variation

Dimensions in

(mm)

MIN NOM MAX

b

A

.140

.020

-

.190

.055

A1

A2

b

WITH PLATING

c

.080

-

.115

.015 .027 .040

b2

c

.045

.014

.560

-

.070

.024

.650

-

D

D1

.330

.480

.380

.270

-

.355

.507

.420

.350

BASE METAL

CONTACT AREA

D2

E

E1

E2

e

-

.030

.100 BSC

.200 BSC

e1

.230

-

.270

.250

H1

L1

-

3 PIN TO-220

-

L2

.139

.100

-

.161

.135

∆P

Q

-

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

9

PACKAGE: 3 PIN TO-263

SEATING PLANE

A

E

E/2

C2

L1

D

H

1

2

3

B

c

e

See View C

b

b2

SEATING

PLANE

GAUGE PLANE

0º-8º

A1

L

3-PIN TO-263

JEDEC TO-263

(AA) Variation

Dimensions in inches

MIN NOM MAX

View C

A

A1

b

.160

.000

-

.190

.010

-

.020

.015

.330

-

.039

.029

.380

b

c

-

D

WITH PLATING

c

D1

E

.270

-

.420

-

.380

.245

-

E1

-

e

.100 BSC

.625

H

.575

-

BASE METAL

SECTION B-B

L

.070

-

.110

.066

.070

L1

L2

L3

-

.010 BSC

3 PIN TO-263

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

10

ORDERING INFORMATION

PART NUMBER

SPX1202U

ACC.

1%

OUTPUT VOLTAGE

Adj

PACKAGE

3 Pin TO220

3 Pin TO-263

3 Pin SOT-223

3 Pin TO-252

SPX1202U-2.5

SPX1202U-3.0

SPX1202U-3.3

SPX1202T

2.5V

3.0V

3.3V

Adj

SPX1202T/TR

SPX1202T-2.5

SPX1202T-2.5/TR

SPX1202T-3.0

SPX1202T-3.0/TR

SPX1202T-3.3

SPX1202T-3.3/TR

SPX1202M3

Adj

2.5V

3.0V

3.3V

Adj

SPX1202M3/TR

SPX1202M3-2.5

SPX1202M3-2.5/TR

SPX1202M3-3.0

SPX1202M3-3.0/TR

SPX1202M3-3.3

SPX1202M3-3.3/TR

SPX1202R

Adj

2.5V

3.0V

3.3V

Adj

SPX1202R/TR

SPX1202R-2.5

SPX1202R-2.5/TR

SPX1202R-3.0

SPX1202R-3.0/TR

SPX1202R-3.3

SPX1202R-3.3/TR

Adj

2.5V

3.0V

3.3V

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

Milpitas, CA 95035

TEL: (408) 934-7500

FAX: (408) 935-7600

ANALOG EXCELLENCE

Date: 5/25/04

SPX1202 600mA Low Dropout Positive Linear Regulator

11


型号：	SPX1202M3-L-2.5/TR
厂家：	SIPEX CORPORATION
描述：	Fixed Positive LDO Regulator, 2.5V, 1.15V Dropout, PDSO4, SOT-223, 3 PIN 光电二极管输出元件调节器
文件：	总11页 (文件大小：205K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SPX1202M3-L-2.5/TR [SIPEX]

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SPX1202M3-L-3.3/TR

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