SPX1431S/TR_技术文档

SPX1431

Precision Adjustable Shunt Regulator

FEATURES

■ Trimmed Bandgap Reference to 0.4%

■ Wide Operating Current 1mA to 150mA

■ Extended Temperature Range:

-55°C to 125°C

CATHODE

1

2

3

4

8

7

6

5

REF

SPX1431

ANODE

N/C

8 Pin nSOIC

ANODE

N/C

■ Low Temperature Coefficient 30 ppm/°C

Available in Lead Free Packaging

■ Offered in TO-92, SOIC, SOT-89,

SOT-23-5

■ Improved Replacement in Performance for

Now Available in Lead Free Packaging

LT1431

■ Low Cost Solution

APPLICATIONS

■ Battery Operating Equipment

■ Adjustable Supplies

■ Switching Power Supplies

■ Error Amplifiers

■ Single Supply Amplifier

■ Monitors / VCRs / TVs

■ Personal Computers

DESCRIPTION

The SPX1431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate

bandgap reference.The SPX1431 acts as an open-loop error amplifier with a 2.5V temperature

compensation reference. The SPX1431's thermal stability, wide operating current (150mA)

and temperature range (-55°C to 125°C) makes it suitable for a variety of applications that

require a low cost, high performance solution. SPX1431 tolerance of 0.4% 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 lines and contributes a significant cost

savings.

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

resistors. The SPX1431 is available in TO-92, SOIC-8, SOT-89, and SOT-23-5 packages.

BLOCK DIAGRAM

Cathode (K)

Reference

(R)

+

-

2.5V

Anode (A)

Marꢀ3-07

SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

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ABSOLUTE MAXIMUM RATINGS

RECOMMENDED CONDITIONS

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

PARAMETER

SYMBOL

V_KA

RATING

V_REFto 36

10

UNIT

V

Cathode Voltage

Cathode Current

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

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

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

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

I_K

mA

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

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

TYPICAL THERMAL RESISTANCES

PACKAGE

TO-92

0_JA

0_JC

TYPICAL DERATING

6.3 mW/°C

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.

160°C/W 80°C/W

575°C/W 150°C/W

175°C/W 45°C/W

110°C/W 8°C/W

SOT-23

SOIC-8

SOT-89

1.7 mW/°C

5.7 mW/°C

9.1mW/C°

Typical deratings of the thermal resistances are given for ambient

temperature >25°C.

ELECTRICAL CHARACTERISTICS

Electrical characteristics at 25°C I_K= 10mA V _K= V _REF, unless otherwise specified.

PARAMETER

SPX1431

SYMBOL FIGURE

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Voltage

V_REF

TC

2

2.490

2.465

2.500

2.510

2.535

V

T_J= 0 °C to 105°C

6V_REFwithTemp.*

2

0.07

-1.1

0.20

mV/ °C

Ratio of Change in V_REF

to Cathode Voltage

6 V_REF

6V_K

3

V_k= 3V to 36V

-2.0

mV/V

Reference Input Current

I_REFTemp Deviation

Min I_Kfor Regulation

Off State Leakage

I_REF

6I_REF

I _K(MIN)

I_K(OFF)

3

2

4

0.7

0.4

1.9

1.2

1

µA

T_J= 0 °C to 105°C

0.4

mA

nA

V_REF= 0V,

V_KA= 36V

0.04

250

Dynamic Output

Impedance

Z_KA

2

ƒ_z)1kHz

I_K= 1 to 150mA

0.15

0.5

1

Operating Range (T_J) = - 55°C to 125°C.

* See appropiate test circuit (Figure 2)

Marꢀ3-07

SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

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CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC)

mV

0

ppm

0

%

0

6

V_REF(mV)

6

V_REF

•

TC in mV/°C =

6

T_A

6

T

6

V_REF

x 100

x 10⁶

-10

(

6

V_REFat 25°C

)

•

TC in %/°C =

5000

0.5

6

T_A

6V_REF

(

V_REFat 25°C

•

TC in ppm/°C =

0

15

30

45

60

75

90

105

6

T_A

Junction Temperature (°C)

0.07 mV/°C

0.003 %/°C

27 ppm/°C

Figure 1. V_REFVS Temperature.

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

Marꢀ3-07

SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

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TYPICAL PERFORMANCE CHARACTERISTICS

150

125

100

75

2.53

V

= V

KA

REF

V

K

= V

KA

REF

= 10mA

2.52

2.51

2.50

2.49

2.48

2.47

2.46

2.45

0°C to 105°C

I

50

25

0

-25

-50

-75

-100

-2

-1

0

1

2

3

-60

-30 30

T Ambient Temperature (°C)

A

0

60

90

120

V

KA

Cathode Voltage (V)

Figure 5. High Current Operating Characteristics

Figure 6. Reference Voltage VS Ambient Tempetature

900

800

3.0

V

= V

KA

REF

0°to 105 °C

700

600

500

400

300

200

100

0

R1 = 10k1

R2 = '

K

2.5

I

= 10mA

2.0

1.5

1.0

0.5

0

105°C

25°C

-0°C

-100

-200

-60

-30

0

30

60

90

120

-1.0

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

70

60

50

40

30

20

0

-10

0°C

-20

-30

-40

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

100

1K

10K

100K

3

6

9

12 15 18 21 24 27 30

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

Marꢀ3-07

SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

4

TYPICAL PERFORMANCE CHARACTERISTICS

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

0.125

0.100

0.075

0.050

0.025

0.0

V

= V

KA

REF

PHASE (A/R)

46.717deg

I

= 1 to 100mA

K

f)1kHz

PHASE

GAIN

-60

-30

0

30

60

90

120

10

100

1K

10K

100K

1M

10M

T

Free Air Temperature

A

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

2301

I_K

15k1

9µF

V

OUT

V_IN

8.25k1

GND

Figure 13. Test Circuit for Gain and Phase Frequency

Response

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

100

V_IN

A: V = V

KA

REF

90

80

70

60

50

40

30

20

10

0

B: V = 5V at I =10mA

2501

KA

K

C: V =10V at I =10mA

KA

K

D: V =15V at I =10mA

KA

K

VOUT

C

I_K

STABLE

f_{p = 100kHz}

A

501

T

A = 25°C

B

D

10⁰10¹10²

10³10⁴10⁵10⁶10⁷

GND

C

Load Capacitance (pF)

L

Figure 16. Stability Boundary Conditions

Figure 15. Test Circuit for Pulse Response

Marꢀ3-07

SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

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TYPICAL PERFORMANCE CHARACTERISTICS

100

1

5

01

T_A= 25 °C

I_K

=

1mA to 100mA

I

K

10

1.0

R

C

L

1

0

k1

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

SPX1431

0.1

R2

0.1%

0.01

-50

0

50

100

150

T

A

Ambient Temperature (°C)

Figure 19. Off State Leakage

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

V

OUT

IN

I

SINK

Q1

R3

R2

R1

0.1%

Opto Isolator

R3 sets feedback gain,

C1 provides feedback

compensation

Isolated

Feedback

SPX1431

C1

+

C2

R1

0.1%

SPX1431

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

Marꢀ3-07

SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

ꢂ

TYPICAL PERFORMANCE CHARACTERISTICS

V

IN

V

OUT

IN

R5

R1

0.1%

R4

R3

R2

0.1%

Q1

R3

R1

0.1%

C1

V

OUT

SPX1431

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

R2

* Resistor values are chosen such that the effect to

I_REFis negligible .

V

OUT

R1

V

IN

SPX1431

Figure 25. Single Supply Comparator with Temperature

Compensated Threshold. V_INthreshold = 2.5V

PACKAGE PINOUTS

S

O

T-23-5(M5)

S

O

T-89(M1)

8-PinSurfaceMount(S)

TO-92(N)

R

E

F

A

N

O

D

E

1

2

3

5

1

4

3

R

E

F

1

2

3

4

8

7

6

5

C

A

N

T

H

OD

O

E

D

E

1

3

2

AN

O

D

E

2

A

N

O

D

E

A

N

OD

E

C

A

T

H

O

D

E

R

E

F

R

E

F

C

A

T

H

O

D

E

N/C

N/C CA

T

H

O

D

E

A OD

N

E

A

N DE

O

N/C

TopView

BottomView

TopView

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SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

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Package: 8 Pin nSOic

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SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

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Package: 5 Pin SOT-23

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SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

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Package: 3 Pin SOT-89

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SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

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Package: 3 Pin TO-92

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SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

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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 herein; neither does it convey

any license under its patent rights nor the rights of others.

Marꢀ3-07

SPXꢀ43ꢀ Precision Adjustable Shunt Regulator

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型号：	SPX1431S/TR
厂家：	SIPEX CORPORATION
描述：	Precision Adjustable Shunt Regulator 精密可调并联稳压器稳压器
文件：	总12页 (文件大小：718K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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