Datasheet SPX2431 Datasheet (Sipex)

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®

Precision Adjustable Shunt Regulator

SPX1431

FEATURES

■ Trimmed Bandgap Reference to 0.4%

■ Wide Operating Current 1mA to 150mA

■ Extended Temperature Range:

-55°C to 125°C

■ Low Temperature Coefficient 30 ppm/°C

■ Offered in TO-92, SOIC, SOT-89,

SOT-23-5

■ Improved Replacement in Performance for

APPLICATIONS

■ Battery Operating Equipment

■ Adjustable Supplies

■ Switching Power Supplies

■ Error Amplifiers

■ Single Supply Amplifier

■ Monitors / VCRs / TVs

■ Personal Computers

LT1431

■ Low Cost Solution

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

and 36 volts with two external

REF

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)

1

ABSOLUTE MAXIMUM RATINGS

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

Anode-Cathode Forward Current, (<10ms) I

Operating Cathode Current IKA.................................................. 150mA

Reference Input Current I Continuous Power Dissipation at 25°C P

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

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

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

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

Junction Temperature TJ...........................................................150 °C

Storage Temperature T Lead Temperature (Soldering 10 sec.) T

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 conditions for extended periods may affect reliability.

........................................................ 10mA

REF

.............................................. -65 to 150 °C

STG

................................. 1A

AK

D

..................................300°C

L

RECOMMENDED CONDITIONS

PARAMETER SYMBOL RATING UNIT

Cathode Voltage V Cathode Current I

V

KA K

to 36 V

REF

10 mA

TYPICAL THERMAL RESISTANCES

PACKAGE

TO-92 160°C/W 80°C/W 6.3 mW/°C SOT-23 575°C/W 150°C/W 1.7 mW/°C SOIC-8 175°C/W 45°C/W 5.7 mW/°C

0

JA

0

TYPICAL DERATING

JC

SOT-89 110°C/W 8°C/W 9.1mW/C°

Typical deratings of the thermal resistances are given for ambient temperature >25°C.

ELECTRICAL CHARACTERISTICS

Electrical characteristics at 25°C IK = 10mA VK = V

PARAMETER SYMBOL FIGURE CONDITIONS MIN TYP MAX UNITS SPX1431

Reference Voltage V

∆V

withTemp.* TC 2 0.07 0.20 mV/°C

REF

Ratio of Change in V

REF

to Cathode Voltage ∆V Reference Input Current I I

Temp Deviation ∆I

REF

Min IK for Regulation I Off State Leakage I

Dynamic Output Z

∆ V

REF

K(MIN) K(OFF)

REF

K

REF

KA

Impedance IK = 1 to 150mA

Operating Range (TJ ) = - 55°C to 125°C. * See appropiate test circuit (Figure 2)

, unless otherwise specified.

REF

2 2.490 2.500 2.510 V 2T

3V

= 0°C to 105°C 2.465 2.535 V

J

= 3V to 36V -2.0 -1.1 mV/V

k

3 0.7 1.9 µA 3T

= 0°C to 105°C 0.4 1.2 µA

J

2 0.4 1 mA 4V

= 0V, 0.04 250 nA

REF

VKA = 36V

2ƒz ≤ 1kHz 0.15 0.5 Ω

2

CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC)

mV

%

ppm

000

∆

V

REF

∆

T

-10

0.55000

0153045607590105

Junction Temperature (°C)

0.07 mV/°C

0.003 %/°C 27 ppm/°C

•

TC in mV/°C =

•

TC in %/°C =

• TC in ppm/°C =

∆

V

(mV)

REF

∆

T

A

∆

V

REF

(

∆

V

at 25°C

REF

∆

V

REF

(

∆

V

at 25°C

REF

x 100

)

∆

T

A

6

x 10

)

∆

T

A

Figure 1. V

VS Temperature.

REF

TEST CIRCUITS

V

IN

I

REF

Figure 2. Test Circuit for VKA = V

V

KA

I

K

KOFF

I

K (OFF)

V

KA

V

=

REF

V

IN

R1

I

REF

(V

)

REF

R2

Figure 3. Test Circuit for VKA > V

V

KA

I

K

REF

V

IN

Figure 4. Test Circuit for I

3

TYPICAL PERFORMANCE CHARACTERISTICS

150 125 100

VKA = V

REF

0°C to 105°C

75 50 25

0

-25

Cathode Current (mA)

K

-50

I

-75

-100

-2 -1 0 1 2 3

V

Cathode Voltage (V)

KA

Figure 5. High Current Operating Characteristics

900 800 700

VKA = V

REF

0° to 105°C

600 500 400 300 200 100

Cathode Current (µA)

K

I

0

105°C

25°C

-0°C

-100

-200

-1.0 0 1.0 2.0 3.0

V

Cathode Voltage (V)

KA

Figure 7. Low Current Operating Characteristics

2.53

VKA = V

2.52

REF

IK = 10mA

2.51

2.50

2.49

2.48

Reference Voltage (V)

2.47

REF

V

2.46

2.45

-60 -30 0 30 60 90 120

Ambient Temperature (°C)

T

A

Figure 6. Reference Voltage VS Ambient Tempetature

3.0

R1 = 10kΩ

R2 = ∞ = 10mA

I

K

0

-60 -30 0 30 60 90 120

Ambient Temperature (°C)

T

A

Reference Input Current (µA)

REF

I

2.5

2.0

1.5

1.0

0.5

Figure 8. Reference Input Current VS Ambient Temperature

0

-10 0°C

(mV)

REF

∆V

-20

-30

IKA = 10mA

25°C

75°C

125°C

-40

-50

0 3691215 18 21 24 27 30

V

Cathode Voltage (V)

KA

Figure 9. Reference Voltage Line Regulation VS Cathode Voltage and T

AMBIENT

70

60

50

40

30

Noise Voltage nV√Hz

20

VKA = V

REF

IK = 10mA

10

TA = 25°C

0 10 100 1K 10K 100K

f Frequency (Hz)

Figure 10. Noise Voltage VS Frequency

4

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

0.150

VKA = V

REF

0.125

IK = 1 to 100mA

f≤1kHz

0.100

0.075

0.050

Dynamic Impedance (Ω)

KA

Z

0.025

0.0

-60 -30 0 30 60 90 120

Free Air Temperature

T

A

Figure 11. Low Frequency Dynamic Output Impedance VS T

AMBIENT

V

OUT

9µF

V

IN

15kΩ

8.25kΩ

I

K

230Ω

GND

REF LEVEL

60.000dB

0.0deg

10 100 1K 10K 100K 1M 10M

START 10.000Hz

/DIV

10.000dB

45.000deg

MARKER 19 422 MAG (A/R) MARKER 19 422 PHASE (A/R)

STOP 50 000 000.000Hz

611.000Hz

-0.125dB

611.000Hz

46.717deg

PHASE

GAIN

Figure 12. Small Signal Gain and Phase VS Frequency; I

= 10mA, TA = 25°C

K

V

IN

V

OUT

Figure 13. Test Circuit for Gain and Phase Frequency

Figure 14. Frequency = 100kHz, IK = 10mA, TA = 25°C

Response

V

IN

250Ω

V

OUT

I

K

f

p = 100kHz

50Ω

GND

Figure 15. Test Circuit for Pulse Response

100

A: VKA = V

90 80 70

REF

B: VKA= 5V at IK=10mA C: V

=10V at IK=10mA

KA

D: VKA=15V at IK=10mA

C

60 50 40 30

Cathode Current (mA)

K

20

I

10

0

10010110210310410510610

STABLE

T

A = 25°C

C

Load Capacitance (pF)

L

A

B

D

Figure 16. Stability Boundary Conditions

STABLE

7

5

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

150 Ω

I

K

R

C

L

10kΩ

100

TA=25°C I

=

1mA to 100mA

K

10

1.0

- Dynamic

KA

Z

0.1

0.01 1K 10K 100K 1M 10M

f - Frequency (Hz)

Figure 17. Test Circuit for Stability

Figure 18. Dynamic Output Impedance TA = 25°C, IK = 1 to 100mA

100

10

VKA = 36V V

= 0V

1

REF

Cathode Current (nA)

0.1

KOFF

I

0.01

-50 0 50 100 150

TA Ambient Temperature (°C)

V

IN

R3

R1

0.1%

V

REF

R2

0.1%

Figure 19. Off State Leakage Figure 20. Shunt Regulator V

= (1+R1/R2)V

OUT

V

OUT

SPX1431

REF

V

Opto Isolator

C2

OUT

R3

SPX1431

V

OUT

C1

RTN

+

R1

0.1%

R3 sets feedback gain, C1 provides feedback compensation

R2

0.1%

V

IN

R2

SPX1431

Figure 21. Constant Current, Sink, I

SINK

I

SINK

R1

0.1%

= V

Q1

REF

/R1

Isolated

Feedback

Figure 22. Reference Amplifier for Isolated Feedback in Off-Line DC-DC Converters

6

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

V

IN

R5

R4

R3

R1

C1

SPX1431

0.1%

R2

0.1%

Figure 23. Precision High Current Series Regulator V

= (1+R1/R2)V

OUT

V

IN

R1

REF

V

CC

R2

V

OUT

V

IN

R1

0.1%

R2

0.1%

V

OUT

SPX1431

R3

Q1

V

OUT

Figure 24. High Current Shunt Regulator V

= (1+R1/R2)V

OUT

REF

* Resistor values are chosen such that the effect to I

is negligible

REF

.

SPX1431

Figure 25. Single Supply Comparator with Temperature Compensated Threshold. VIN threshold = 2.5V

7

PACKAGES

CATHODE

ANODE

N/C

8-Pin Surface Mount (S)

1

8

2

7

3

6

4

5

Top View

REF

ANODE

N/C

SOT-23-5 (M5)

ANODEREF

54

3

21

N/C

N/C CATHODE

Top View

PACKAGE:

4.0 (0.158)

3.8 (0.150)

SOT-89 (M1)

1

2

REF

ANODE

Top View

3

CATHODE

REF

TO- 92 ( N)

132

ANODE

Bottom View

8 PIN PLASTIC SMALL OUTLINE (SOIC) (NARROW)

5.2 (0.205)

4.6 (0.181)

6.2 (0.244)

5.8 (0.228)

CATHODE

Pin 1

1.27 (0.50) BSC

1.75 (0.069)

1.35 (0.053)

5.0 (0.197)

4.8 (0.188)

0.78 (0.031)

0.61 (0.024)

0.37 (0.015) BSC

45

°

7°(4 PLCS)

0.77 (0.030)

0.64 (0.025)

3°-6°

0.56 (0.022)

0.49 (0.019)

0.45 (0.018)

0.35 (0.014)

0.20 (0.008)

0.10 (0.004)

0.19 (0.007)

0.22 (0.009) 7°(4 PLCS)

8

PACKAGE: 5 Lead SOT23

C

L

b

e

E

e1

D

C

L

A2

A

A1

A

.10

SYMBOL

A

A1

A2

b

C

D

a

C

MIN MAX

0.90

0.00

0.90

0.25

0.09

2.80

C

L

E1

1.45

0.15

1.30

0.50

0.20

3.10

DATUM 'A

L

0.20

'

2

E

E1

L

e

e1

a

2.60

1.50

0.35

0

0.95ref

1.90ref

O

3.00

1.75

0.55

10

O

9

PACKAGE:

3 Lead SOT-89

P

1

K

F

STYLE 1

PIN 1. BASE

2. COLLECTOR

3. EMITTER

STYLE 2

PIN 1. ANODE

2. CATHODE

3. NO CONNECTION

A

2

G

STYLE 3

PIN 1. GATE

2. ANODE

3. CATHODE

STYLE 4

PIN 1. DRAIN

2. GATE

3. SOURCE

C

N

3

B

D

MILLIMETERS INCHESDIM

MIN MAX MIN MAX A 4.40 4.60 0.174 0.181 B 2.29 2.60 0.091 0.102 C 140 160 0.056 0.062 D 0.36 0.48 0.015 0.018 E 1.62 1.80 0.064 0.070

F 0.44 0.53 0.018 0.020

G

J 0.35 0.44 0.014 0.017

K 0.80 1.04 0.032 0.040

L 300 BSC 0.118 BSC N 2.04 2.28 0.081 0.089 P 3.94 4.25 0.156 0.167

150 BSC 0.059 BSC

C

-T-

10

0.090 (2.286) Radius typ. 2

1

3

PACKAGE: TO-92

0.145 (3.683)

0.135 (3.429)

0.055 (1.397)

0.045 (1.143)

10° typ.

0.185 (4.699)

0.175 (4.445)

Seating Plane

0.016 (0.406)

0.014 (0.356)

0.055 (1.397)

0.045 (1.143)

BOTTOM VIEW

0.185 (4.699)

0.045 (1.143)

0.085 (2.159) Diameter

0.090 (2.286) typ.

0.025 (0.635) Max Uncontrolled Lead Diameter

0.500 (12.70) Min.

5° typ.

0.0155 (0.3937)

0.0145 (0.3683)

0.105 (2.667)

0.095 (2.413)

11

ORDERING INFORMATION

PART NUMBER ACCURACY OUTPUT VOLTAGE PACKAGES

SPX1431M5 ......................... 0.4%.....................2.5V ............................ 5-Pin SOT-23

SPX1431M1 ......................... 0.4%.....................2.5V ............................ 3-Pin SOT-89

SPX1431S............................ 0.4%.....................2.5V ................................8-Pin SOIC

SPX1431N............................ 0.4%.....................2.5V .............................. 3-Pin TO-92

Corporation

SIGNAL PROCESSING EXCELLENCE

Sipex Corporation Headquarters and

Sales Office

22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: [email protected]

Sales Office

233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600

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