SPX431BN-L/TR_技术文档

®

SPX431A,B,C

Precision Adjustable Shunt Regulator

FEATURES

APPLICATIONS

■ Trimmed Bandgap to 0.5%, 1% and 2%

■ Wide Operating Current 1mA to 150mA

■ Battery Operating Equipment

■ Adjustable Supplies

■ Extended Temperature Range:

0°C to 105°C

■ Low Temperature Coefficient 30 ppm/°C

■ Switching Power Supplies

■ Error Amplifiers

■ Single Supply Amplifier

■ Monitors / VCRs / TVs

■ Personal Computers

■ Offered in TO-92, SOIC, SOT-89,

SOT-23-5

■ Improved Replacement in Performance for

Now Available in Lead Free Packaging

TL431

■ Low Cost Solution

Refer to page 3 for pinouts.

DESCRIPTION

The SPX431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate

bandgap reference. The SPX431 acts as an open-loop error amplifier with a 2.5V temperature

compensation reference. The SPX431's thermal stability, wide operating current (150mA) and

temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a low

cost, high performance solution. SPX431A tolerance of 0.5% is proven to be sufficient to

overcome all of the other errors in the system to virtually eliminate the need for trimming in the

power supply manufacturer's assembly line and contribute a significant cost savings.

The output voltage may be adjusted to any value between V and 36 volts with two external

resistors. The SPX431 is available in TO-92, SOIC-8, SOT-8^R9^E,^Fand SOT-23-5 packages.

TYPICAL APPLICATIONS CIRCUIT

Cathode (K)

Reference

(R)

+

-

2.5V

Anode (A)

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

1

ABSOLUTE MAXIMUM RATINGS

Junction Temperature T_J........................................................... 150 °C

Storage Temperature T_STG.............................................. -65 to 150 °C

Cathode-Anode Reverse Breakdown V_KA....................................... 37V

Anode-Cathode Forward Current, (<10ms) I_AK................................. 1A

Operating Cathode Current I_KA.................................................. 150mA

Reference Input Current I_REF........................................................ 10mA

Continuous Power Dissipation at 25°C P_D

NOTE: Stresses greater than those listed under ABSOLUTE MAXIMUM

RATINGS may cause permanent damage to the device. This is a stress

rating only and functional operation of the device at these or any other

conditions above those indicated in the operational sections of this

specification is not implied. Exposure to absolute maximum rating condi-

tions for extended periods may affect reliability.

TO-92 ..................................................................... 775mW

SOT-23 .................................................................. 200 mW

SOIC-8 .................................................................... 750mW

SOT-89 ................................................................. 1000mW

RECOMMENDED CONDITIONS

TYPICAL THERMAL RESISTANCES

PARAMETER

SYMBOL

V_KA

RATING

V_REFto 36

10

UNIT

V

PACKAGE

TO-92

0_JA

0_JC

TYPICAL DERATING

6.3 mW/°C

Cathode Voltage

Cathode Current

160°C/W 80°C/W

575°C/W 150°C/W

175°C/W 45°C/W

110°C/W 8°C/W

I_K

mA

SOT-23

SOIC-8

SOT-89

1.7 mW/°C

5.7 mW/°C

9.1 mW/°C

Typical deratings of the thermal resistances are given for ambient

temperature >25°.

ELECTRICAL CHARACTERISTICS

Electrical characteristics at 25°C I_K= 10mA V_K= V_REF, unless otherwise specified.

PARAMETER

SPX431A

SYMBOL FIGURE

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Voltage

V_REF

TC

2

2.490

2.469

2.503

0.07

2.515

2.536

V

T_J= 0°C to 105°C

∆V_REFwithTemp.*

2

3

0.20

mV/°C

Ratio of Change in V_REF

to Cathode Voltage

∆ V_REF

∆V_K

V_REFto 10V

10V to 36V

-2.7

-2.0

-1.0

-0.4

mV/V

0.3

4.0

1.2

1.0

250

0.5

Reference Input Current

I_REFTemp Deviation

Min I_Kfor Regulation

Off State Leakage

I_REF

∆I_REF

I_K(MIN)

I_K(OFF)

Z_KA

3

2

4

2

0.7

0.4

µA

mA

nA

Ω

T_J= 0°C to 105°C

0.4

V_REF= 0V, V_KA= 36V

0.04

0.15

Dynamic Output

Impedance

ƒ_z= 1kHz

I_K= 1 to 150mA

SPX431B

Reference Voltage

V_REF

TC

2

2.470

2.449

2.495

0.07

2.520

2.541

V

T_J= 0°C to 105°C

∆V_REFwithTemp.*

2

3

0.20

mV/°C

Ratio of Change in V_REF

to Cathode Voltage

∆ V_REF

∆V_K

V_REFto 10V

10V to 36V

-2.7

-2.0

-1.0

-0.4

mV/V

0.3

4.0

1.2

1.0

500

0.5

Reference Input Current

I_REFTemp Deviation

Min I_Kfor Regulation

Off State Leakage

I_REF

∆I_REF

I_K(MIN)

I_K(OFF)

Z_KA

3

2

4

2

0.7

0.4

µA

mA

nA

Ω

T_J= 0°C to 105°C

0.4

V_REF= 0V, V_KA= 36V

0.04

0.15

Dynamic Output

Impedance

ƒ_z= 1kHz

I_K= 1 to 150mA

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

2

PARAMETER

SPX431C

SYMBOL

FIGURE

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Voltage

V_REF

TC

2

2.445

2.495

0.07

2.545

0.20

V

T_J= 0°C to 105°C

∆V_REFwithTemp.*

2

3

mV/°C

Ratio of Change in V_REF

to Cathode Voltage

∆ V_REF

∆V_K

V_REFto 10V

10V to 36V

-2.7

-2.0

-1.0

-0.4

mV/V

0.3

4.0

Reference Input Current

I_REFTemp Deviation

Min I_Kfor Regulation

Off State Leakage

I_REF

∆I_REF

I_K(MIN)

I_K(OFF)

Z_KA

3

2

4

2

0.7

0.4

µA

mA

nA

Ω

T_J= 0°C to 105°C

1.2

0.4

1.0

V_REF= 0V, V_KA= 36V

0.04

0.15

1000

0.5

Dynamic Output

Impedance

ƒ_z= 1kHz

I_K= 1 to 150mA

Operating Range (T_J) = -40°C to 125°C.

* See appropiate test circuit (Figure 2)

CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC)

mV

0

ppm

0

%

0

∆

V_REF(mV)

T_A

∆

V_REF

•

TC in mV/°C =

∆

T

∆

V_REF

x 100

x 10⁶

-10

(

∆

V_REFat 25°C

)

•

TC in %/°C =

5000

0.5

∆T_A

∆

V_REF

(

∆

V_REFat 25°C

•

TC in ppm/°C =

0

15

30

45

60

75

90

105

∆T_A

Junction Temperature (°C)

0.07 mV/°C

0.003 %/°C

27 ppm/°C

Figure 1. V_REFVS Temperature.

PACKAGE PINOUTS

8-Pin Surface Mount (S)

SOT-23-5 (M5)

REF

SOT-89 (M1)

SPX431

TO-92 (N)

ANODE

1

2

3

5

4

3

REF

1

2

3

4

8

7

6

5

CATHODE

ANODE

N/C

SPX431

2

1

ANODE

N/C

2

3

1

SPX431

CATHODE

REF

CATHODE

N/C

N/C CATHODE

ANODE

Bottom View

Top View

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

3

TEST CIRCUITS

V_IN

V_KA

=

V_REF

V_IN

V_KA

V_IN

V_KA

I_{K (OFF)}

R1

I_K

I_REF

I_K

I_REF

(V_REF

)

R2

Figure 2. Test Circuit for V_KA= V_REF

Figure 3. Test Circuit for V_KA> V_REF

Figure 4. Test Circuit for I_KOFF

TYPICAL PERFORMANCE CHARACTERISTICS

2.53

2.52

2.51

2.50

2.49

2.48

2.47

2.46

2.45

150

125

V

K

= V

REF

KA

= 10mA

V

= V

REF

KA

I

0°C to 105°C

100

75

50

25

0

-25

-50

-75

-100

-2

-1

0

1

2

3

-60

-30

0

30

60

90

120

V

Cathode Voltage (V)

KA

T

Ambient Temperature (°C)

A

Figure 5. High Current Operating Characteristics

Figure 6. Reference Voltage VS Ambient Tempetature

3.0

900

800

R1 = 10kΩ

R2 = ∞

K

V

= V

REF

2.5

KA

I

= 10mA

0° to 105°C

700

600

500

400

300

200

100

0

2.0

1.5

1.0

0.5

0

105°C

25°C

-0°C

-100

-200

-1.0

-60

-30

0

30

60

90

120

0

1.0

2.0

3.0

T

A

Ambient Temperature (°C)

V

KA

Cathode Voltage (V)

Figure 8. Reference Input Current VS Ambient

Temperature

Figure 7. Low Current Operating Characteristics

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

4

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

0

-10

-20

-30

-40

70

60

50

40

30

20

0°C

25°C

75°C

125°C

I

= 10mA

KA

V_KA= V_REF

10 I_K= 10mA

T_A= 25°C

0

10

-50

0

3

6

9

12 15 18 21 24 27 30

100

1K

10K

100K

V

Cathode Voltage (V)

KA

f Frequency (Hz)

Figure 10. Noise Voltage VS Frequency

Figure 9. Reference Voltage Line Regulation VS

Cathode Voltage and T_AMBIENT

REF LEVEL

60.000dB

0.0deg

/DIV

10.000dB

45.000deg

MARKER 19 422 611.000Hz

MAG (A/R) -0.125dB

MARKER 19 422 611.000Hz

0.150

PHASE (A/R)

46.717deg

60dB

50dB

40dB

30dB

20dB

10dB

0dB

V

= V

REF

215°

KA

I

K

= 1 to 100mA

0.125

0.100

0.075

0.050

0.025

0.0

180°

135°

90°

f≤1kHz

PHASE

45°

0°

GAIN

-45°

-90°

-135°

-180°

-215°

-10dB

-20dB

-30dB

-40dB

-60

-30

0

30

60

90

120

10

100

1K

10K

100K

1M

10M

T

A

Free Air Temperature

START 10.000Hz

STOP 50 000 000.000Hz

Figure 12. Small Signal Gain and Phase VS Frequency;

I_K= 10mA, T_A= 25°C

Figure 11. Low Frequency Dynamic Output Impedance

VS T_AMBIENT

V_OUT

V

IN

230Ω

15kΩ

I_K

9µF

V

OUT

V_IN

8.25kΩ

GND

Figure 13. Test Circuit for Gain and Phase Frequency

Response

Figure 14. F_Z= 100kHz, I_K= 10mA, T_A= 25°C

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

5

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

100

VIN

A: V = V

KA REF

90

80

70

60

50

40

30

20

10

0

250Ω

B: V = 5V at I =10mA

KA

K

C: V =10V at I =10mA

KA

K

V

OUT

D: V =15V at I =10mA

KA

K

C

I_K

f_{p = 100kHz}

50Ω

STABLE

A

T

A = 25°C

B

D

10⁰10¹10²

10³10⁴10⁵10⁶10⁷

GND

C

L

Load Capacitance (pF)

Figure 16. Stability Boundry Conditions

Figure 15. Test Circuit for Pulse Response

100

150 Ω

T_A= 25 °C

I_K

=

1 to 100mA

I_K

10

1.0

R

C_L

10kΩ

0.1

0.01

1K

10K

100K

1M

10M

f Frequency (Hz)

Figure 18. Dynamic Output Impedance T_A= 25°C,

Figure 17. Test Circuit for Stability

I_K= 1 to 100mA

100

10

R3

V

IN

OUT

R1

0.1%

V

= 36V

KA

= 0V

REF

1

V

REF

SPX431A,B,C

0.1

R2

0.1%

0.01

-50

0

50

100

150

T

Ambient Temperature (°C)

A

Figure 19. Off State Leakage

Figure 20. Shunt Regulator V_OUT= (1+R1/R2)V_REF

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

6

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

V

IN

OUT

I

SINK

Q1

R3

R2

R1

0.1%

Opto Isolator

R3 sets feedback gain,

C1 provides feedback

compensation

Isolated

Feedback

SPX431A,B,C

C1

+

C2

R1

0.1%

SPX431A,B,C

R2

0.1%

V

RTN

OUT

Figure 22. Reference Amplifier for Isolated Feedback in

Off-Line DC-DC Converters

Figure 21. Constant Current, Sink, I_SINK= V_REF/R1

V

IN

V

OUT

IN

R5

R4

R1

0.1%

R3

R2

0.1%

Q1

R3

R1

0.1%

C1

V

OUT

SPX431A,B,C

R2

0.1%

Figure 24. High Current Shunt regulator

V_OUT= (1+R1/R2)V_REF

Figure 23. Precision High Current Series Regulator

V_OUT= (1+R1/R2)V_REF

V

CC

* Resistor values are chosen such that the effect to

I_REFis negligible.

R2

V

OUT

R1

V

IN

SPX431A,B,C

Figure 25. Single Supply Comparator with Temperature

Compensated Threshold. V_INthreshold = 2.5V

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

7

PACKAGE: 8 PIN NSOIC

D

Ø

e

E/2

L2

E1

E1/2

E

Ø

Seating Plane

Ø1

L

L1

Gauge Plane

VIEW C

1

b

INDEX AREA

(D/2 X E1/2)

TOP VIEW

A1

A

Seating Plane

A2

SIDE VIEW

8 Pin NSOIC JEDEC MO-012 (AA) Variation

MIN

1.35

0.1

1.25

0.31

0.17

NOM

-

MAX

1.75

0.25

1.65

0.51

0.24

SYMBOL

A

A1

A2

b

B

SEE VIEW C

c

D

E

E1

e

L

4.90 BSC

6.00 BSC

3.90 BSC

1.27 BSC

-

0.4

1.27

b

L1

L2

ø

1.04 REF

0.25 BSC

-

0º

5º

8º

15º

ø1

-

c

Note: Dimensions in (mm)

BASE METAL

SECTION B-B

WITH PLATING

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

8

PACKAGE: 5 PIN SOT-23

D

e1

N

N/2

+1

E/2

E1/2

B

E

E1

SEE VIEW C

VIEW A-A

1

2

N/2

e

Ø

b

Gauge Plane

Ø

L

Seating Plane

Ø

L

L1

VIEW C

5 Pin SOT-23 JEDEC MO-178 (AA) Variation

MIN

-

0

0.9

0.3

0.08

NOM

-

1.15

-

MAX

1.45

0.15

1.3

0.5

0.22

SYMBOL

A

A1

A2

b

A2

A

Seating Plane

c

D

E

E1

e

e1

L

L1

L2

Ø

2.90 BSC

2.80 BSC

1.60 BSC

0.95 BSC

1.90 BSC

0.45

0.60 REF

0.25 BSC

4º

A1

SIDE VIEW

b

0.3

0.6

WITH PLATING

0º

5º

8º

15º

ø

10º

c

Note: Dimensions in (mm)

BASE METAL

SECTION B-B

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

9

PACKAGE: 3 PIN SOT-89

D

D1

3

Ø1.0

E

H

5º(2x)

L

1

2

e

e1

C

8º(2x)

3 Pin SOT-89

MIN

0.36

0.8

NOM

0.42

-

MAX

0.48

1.2

SYMBOL

b

L

b1

C

D

D1

H

E

0.41

0.38

4.4

1.4

3.94

2.4

0.47

0.4

4.5

1.6

-

2.5

1.5

3

0.53

0.43

4.6

1.75

4.25

2.6

Ro.15

e

e1

1.45

2.9

1.55

3.1

b

b1

Note: Dimensions in (mm)

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

10

PACKAGE: 3 PIN TO-92

L

e1

e

W

D

A

b

S1

3 Pin TO-92

MIN

0.17

0.014

0.13

0.95

0.045

0.5

0.085

0.045

0.016

0.175

4º

NOM

MAX

0.195

0.02

0.155

0.105

0.055

0.61

0.095

0.06

0.022

0.195

6º

SYMBOL

A

b

E

e

e1

L

-

R

E

R

S1

W

D

a

Note: Dimensions in (inches)

a(2x)

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

11

ORDERING INFORMATION

OUTPUT VOLTAGE PACKAGES

PART NUMBER

ACCURACY

SPX431AM5 ........................ 0.5% ..................... 2.503V ......................... 5-Pin SOT-23

SPX431AM5/TR .................. 0.5% ..................... 2.503V ......................... 5-Pin SOT-23

SPX431AM1 ........................ 0.5% ..................... 2.503V ......................... 3-Pin SOT-89

SPX431AM1/TR .................. 0.5% ..................... 2.503V ......................... 3-Pin SOT-89

SPX431AS .......................... 0.5% ..................... 2.503V ............................. 8-Pin SOIC

SPX431AS/TR..................... 0.5% ..................... 2.503V ............................. 8-Pin SOIC

SPX431AN .......................... 0.5% ..................... 2.503V ........................... 3-Pin TO-92

SPX431AN/TR .................... 0.5% ..................... 2.503V ........................... 3-Pin TO-92

SPX431BM5 ........................ 1.0% ..................... 2.495V ......................... 5-Pin SOT-23

SPX431BM5/TR .................. 1.0% ..................... 2.495V ......................... 5-Pin SOT-23

SPX431BM1 ........................ 1.0% ..................... 2.495V ......................... 3-Pin SOT-89

SPX431BM1/TR .................. 1.0% ..................... 2.495V ......................... 3-Pin SOT-89

SPX431BS .......................... 1.0% ..................... 2.495V ............................. 8-Pin SOIC

SPX431BS/TR..................... 1.0% ..................... 2.495V ............................. 8-Pin SOIC

SPX431BN .......................... 1.0% ..................... 2.495V ........................... 3-Pin TO-92

SPX431BN/TR .................... 1.0% ..................... 2.495V ........................... 3-Pin TO-92

SPX431CM5........................ 2.0% ..................... 2.495V ......................... 5-Pin SOT-23

SPX431CM5/TR .................. 2.0% ..................... 2.495V ......................... 5-Pin SOT-23

SPX431CM1........................ 2.0% ..................... 2.495V ......................... 3-Pin SOT-89

SPX431CM1/TR .................. 2.0% ..................... 2.495V ......................... 3-Pin SOT-89

SPX431CS .......................... 2.0% ..................... 2.495V ............................. 8-Pin SOIC

SPX431CS/TR .................... 2.0% ..................... 2.495V ............................. 8-Pin SOIC

SPX431CN .......................... 2.0% ..................... 2.495V ........................... 3-Pin TO-92

SPX431CN/TR .................... 2.0% ..................... 2.495V ........................... 3-Pin TO-92

Available in lead free packaging. To order add “-L” suffix to part number.

Example: SPX431AM5/TR = standard; SPX431AM5-L/TR = lead free

/TR = Tape and Reel

Pack quantity is 2,000 for TO-92 and 2,500 for

SOT-23, SOT-89 and NSOIC.

CLICK HERE TO ORDER SAMPLES

Corporation

ANALOG EXCELLENCE

Sipex Corporation

Headquarters and

Sales Office

22 Linnell Circle

Billerica, MA 01821

TEL: (978) 667-8700

FAX: (978) 670-9001

e-mail: sales@sipex.com

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

12


型号：	SPX431BN-L/TR
厂家：	EXAR CORPORATION
描述：	Two Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, PBCY3, LEAD FREE, TO-92, 3 PIN
文件：	总12页 (文件大小：107K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SPX431BN-L/TR [EXAR]

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SPX431CM-L/TR

SPX431CM/TR

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SPX431CM1-L