SPX432AM/TR_技术文档

®

SPX432

1.24V Precision Adjustable Shunt Regulator

Anode

3

FEATURES

■ Low Voltage Operation, 1.24V

■ Trimmed Bandgap to 0.5% and 1%

■ Wide Operating Current, 1mA to 80mA

■ Adjustable Output Voltage, V_REFto 18V

■ Extended Temp.Range: 0°C to 105°C

■ Low Temperature Coefficient, 50 ppm/°C

■ Offered in TO-92, SOIC, SOT-23-3

■ Replacement for TLV431, AS432

SPX432

3 Pin SOT-23

1

Ref

2

Cathode

Now Available in Lead Free Packaging

Refer to page 11 for other pinouts.

APPLICATIONS

■ Single Supply Amplifier

■ Monitors / VCRs / TVs

■ Personal Computers

■ Switching Power Supplies

■ Adjustable Supplies

■ Error Amplifiers

■ Voltage References

DESCRIPTION

The SPX432 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate 1.24V

bandgap reference with 0.5% tolerance. The SPX432’s thermal stability, wide operating current

(80mA) and temperature range (0°C to 105°C) makes it suitable for a variety of applications. SPX432

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 manufactures’ assembly lines and contribute a

significant cost savings.

The SPX432 is an ideal voltage reference in an isolated feedback circuit for switch mode power

supplies. SPX432 offers many advantages over the TLV431 such as wider output voltage (18V vs.

6V), higher output current (80mA vs. 15mA) and a wider operating temperature range with a tighter

tolerance down to 0.5%.

BLOCK DIAGRAM

Cathode (K)

Reference

(R)

+

-

1.24V

Anode (A)

Date: 12/11/04

SPX432 1.24V Precision Adjustable Shunt Regulator

1

Continuous Power Dissipation at 25°C P_D

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

ABSOLUTE MAXIMUM RATINGS

Cathode-Anode Reverse Breakdown V_KA....................................... 20V

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

Operating Cathode Current I_KA.................................................... 80mA

Reference Input Current I_REF.......................................................... 1mA

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

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

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

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

Lead Temperature (Soldering 10 sec.) T_L.................................. 300°C

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.

TYPICAL THERMAL RESISTANCES

RECOMMENDED CONDITIONS

PARAMETER

SYMBOL

RATING

V_REFto 18

10

UNIT

V

PACKAGE

0_JA

0_JC

TYPICAL

DERATING

Cathode Voltage

Cathode Current

V_KA

I_K

TO-92

160°C/W 80°C/W

6.3mW/°C

mA

SOT-23

SOIC-8

575°C/W 150°C/W 1.7 mW/°C

175°C/W 45°C/W 5.7mW/°C

Typical deratings of the thermal resistances are given for ambient

temperature >25°C.

ELECTRICAL CHARACTERISTICS

Electrical characteristics are guaranted over the full junction temperature range (0°C to 105°C). Ambient temperature must

be derated based upon power dissipation and package thermal characteristics. Unless otherwise specified, test conditions are:

V_KA= V_REFand I_K= 10mA.

PARAMETER

SYMBOL TEST

CIRCUIT

CONDITIONS

MIN

TYP

MAX

MIN

TYP MAX

UNITS

SPX432A

SPX432

1.2462 1.2276 1.240

Output Voltage

V_REF

I_REF

3a

3b

3a

3b

1.2338 1.240

1.2524

20

V

Temperature Deviation

Line Regulation

0 < T_J< 105°C

12

19

12

3

20

37

30

6

12

19

12

3

mV

µA

V_KA= 1.25V to 15V

I_K= 1mA to 80mA

37

Load Regulation

30

Reference Input Current

6

Reference Input Current

Temperature Coefficient

I_REF

0 < T_J< 105°C,

0.3

0.6

0.3

0.6

Minimim Cathode

Current for Regulation

I_K(MIN)

3a

3c

0.6

1

0.6

1

mA

nA

Off State Leakage

I_K(MIN)

V_REF= 0V,

V_KA= 18V

0.04

500

0.04

500

Date: 12/11/04

SPX432 1.24V Precision Adjustable Shunt Regulator

2

CALCULATION AVERAGE TEMPERATURE COEFICIENT (TC)

ppm

%

mV

0

∆

V_REF(mV)

T_A

•

TC in mV / °C =

TC in % / °C =

∆

∆V_REF

∆T

∆V_REF

x 100

(

∆V_REFat 25°C

)

T_A

-5

∆

5000

0.5

∆

V_REF

x 10⁶

(

∆

V_REFat 25°C

)

T_A

•

TC in ppm / °C =

0

15

30

45

60

75 90 105

∆

Junction Temperature (°C)

0.0033mV /°C

0.0027% / °C

27ppm/°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

Date: 12/11/04

SPX432 1.24V Precision Adjustable Shunt Regulator

3

TYPICAL PERFORMANCE CHARACTERISTICS

900

15.0

12.5

10.0

7.5

=

V_KA= V_REF

800

V

= V

REF

KA

Temperature Range: 0°C to 105°C

0°C to 105°C

700

600

500

400

5.0

2.5

105 °C

300

0

25 °C

200

-2.5

-5.0

-7.5

-10.0

-0 °C

100

0

1.24

-100

-2

-1

0

1

2

3

-200

V

KA

Cathode Voltage (V)

-1.0

-0.5

0

0.25

0.5

0.75

1.0

1.25

1.5

V_KA- Cathode Voltage (V)

High Current Operating Characteristics.

Low Current Operating Characteristics.

1.25

1.245

1.24

3

2.5

2

1.235

1.23

1.5

1

1.225

1.22

0.5

0

-60

-30

0

30

60

90

120

-60

-30

0

30

60

90

T_A-Ambient Temperature (C)

T -Ambient Temperature (C)

A

V

_KA= V_REF,I_KA= 10mA.

Reference Input Current VS Temperature; I_KA= 10mA.

1.25

1.245

1.24

0

-10

-20

-30

-40

-50

1.235

0.01

0.1

1

10

100

0

3

6

9

12

15

18

21

I_K--cathode Current (mA)

V_KA-Cathode Voltage (V)

Reference Voltage Line Regulation; I_KA= 10mA_,

Sweeping V_KA, 25°C.

V_KA= V_REF,Sweeping I_KA, 25°C.

Date: 12/11/04

SPX432 1.24V Precision Adjustable Shunt Regulator

4

TYPICAL PERFORMANCE CHARACTERISTICS

70

60

50

40

30

20

1000.0000

100.0000

10.0000

1.0000

0.1000

0.0100

V_KA= V_REF

10 I_K= 10mA

T_A= 25°C

0.0010

0.0001

0

10

100

1K

10K

100K

-50

0

50

100

150

T

A

Ambient Temperature (C)

f Frequency (Hz)

Noise Voltage VS Frequency.

Off State Leakage; V_KA= 18V, V_REF= 0V.

100

0.150

T_A= 25 °C

I_K= 1 to 80mA

V

= V

REF

KA

I

= 1 to 80mA

f≤1kHz

K

0.125

0.100

0.075

0.050

0.025

0.0

10

1.0

0.1

0.01

10 M

1 k

10 k

100 k

1 M

-60

-30

0

30

60

90

120

f - Frequency (Hz)

T

Free Air Temperature

A

Low Frequency Dinamic Output Impedance VS T_AMBIENT

.

Dynamic Output Impedance T_A= 25°C, I_KA= 1 to 80mA.

REF LEVEL

0.0deg

70.000dB

/DIV

45.000deg

10.000dB

MARKER 735 074.781Hz

PHASE (A/R) 87.012deg

MARKER 735 074.781Hz

MAG (A/R)

0.047dB

70dB

60dB

215°

180°

V

OUT

PHASE

50dB

135°

230 Ω

I_K

15kΩ

40dB

30dB

20dB

10dB

0dB

90°

45°

0°

µF

10

V

IN

-45°

-90°

3.03kΩ

GAIN

GND

-10dB

-135°

-20dB

-30dB

-180°

-215°

10

100

1K

10K

100K

1M

10M

START 10.000Hz

STOP 10 000 000.000Hz

Small Signal Gain and Phase VS Frequency; I_K= 10mA,

Test Circuit for Gain and Phase Frequency Response.

T_A= 25°C.

Date: 12/11/04

SPX432 1.24V Precision Adjustable Shunt Regulator

5

TYPICAL PERFORMANCE CHARACTERISTICS

V

IN

V

IN

V

OUT

V

OUT

I_KA= 0 to 10mA.

I_KA= 0 to 1mA.

V

IN

V

IN

V

OUT

V

OUT

I_KA= 0 to 50mA.

I_KA= 0 to 80mA.

V

IN

V

IN

R

V

OUT

I

K

V

OUT

f

= 100kHz

50Ω

P

GND

Test Circuit for Pulse Response.

I_KA= 0 to 100mA.

Date: 12/11/04

SPX432 1.24V Precision Adjustable Shunt Regulator

6

TYPICAL PERFORMANCE CHARACTERISTICS

V

IN

R3

V

OUT

IN

I

SINK

Q1

R2

R1

0.1%

V

REF

SPX432

R2

0.1%

R1

0.1%

Constant Current Sink I_SINK= V_REF/R1.

Shunt Regulator, V_OUT= (1+R1/R2)V_REF

.

V

OUT

V

IN

R3

R5

R1

0.1%

Opto Isolator

R4

R3 sets feedback gain,

C1 provides feedback

compensation

Isolated

Feedback

R3

R1

0.1%

C1

V

OUT

SPX432

+

C2

R2

0.1%

SPX432

R2

0.1%

V

OUT

RTN

Reference Amplifier for Isolated Feedback in Off-Line

DC-DC Converters.

Precision High Current Series Regulator,

V

_OUT= (1+R1/R2)V_REF

.

V

IN

V

CC

OUT

R1

0.1%

R3

R2

0.1%

Q1

V

OUT

R1

V

IN

SPX432

Single Supply Comparator with Temperature

Compensated Threshold, V_INthreshold = 1.24V.

High Current Shunt Regulator, V_OUT= (1+R1/R2)V_REF

.

Date: 12/11/04

SPX432 1.24V 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: 12/11/04

SPX432 1.24V Precision Adjustable Shunt Regulator

8

PACKAGE: 3PIN SOT-23

D

b

3

B

SEE VIEW C

E1

E

VIEW A-A

1

2

e

Gauge Plane

Seating Plane

e1

L

Ø

L1

VIEW C

A

A2

A

Seating Plane

C

3 Pin SOT-23 JEDEC TO-236 (AB) Variation

A

A1

SIDE VIEW

MIN

0.89

0.01

0.88

0.3

NOM

-

0.95

-

MAX

1.12

0.1

1.02

0.5

SYMBOL

A

A1

A2

b

c

D

e

e1

E

0.08

2.8

-

0.2

3.04

b

2.9

0.95 BSC

1.90 BSC

-

1.3

0.5

WITH PLATING

0.95

1.2

0.4

2.64

1.4

0.6

E1

L

c

L1

ø

0.54 REF

-

0º

8º

Note: Dimensions in (mm)

BASE METAL SECTION B-B

Date: 12/11/04

SPX432 1.24V Precision Adjustable Shunt Regulator

9

PACKAGE: 3PIN 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: 12/11/04

SPX432 1.24V Precision Adjustable Shunt Regulator

10

PACKAGE PINOUTS

SOT-23-3 (M)

TO-92 (N)

8-Pin Surface Mount (S)

ANODE

1

2

3

REF

1

2

3

4

8

7

6

5

CATHODE

ANODE

N/C

SPX432

ANODE

N/C

1

2

3

SPX432

REF

CATHODE

ANODE

Bottom View

Top View

ORDERING INFORMATION

OUTPUT VOLTAGE PACKAGES

PART NUMBER

ACC

SPX432AM .......................... 0.5%..............1.24V .................................. 3-Pin SOT-23

SPX432AM/TR .................... 0.5%..............1.24V .................................. 3-Pin SOT-23

SPX432AS .......................... 0.5%..............1.24V ................................... 8-Pin NSOIC

SPX432AS/TR..................... 0.5%..............1.24V ................................... 8-Pin NSOIC

SPX432AN .......................... 0.5%..............1.24V .................................... 3-Pin TO-92

SPX432AN/TR .................... 0.5%..............1.24V .................................... 3-Pin TO-92

SPX432M ............................ 1.0%..............1.24V .................................. 3-Pin SOT-23

SPX432M/TR ...................... 1.0%..............1.24V .................................. 3-Pin SOT-23

SPX432S ............................. 1.0%..............1.24V ................................... 8-Pin NSOIC

SPX432S/TR ....................... 1.0%..............1.24V ................................... 8-Pin NSOIC

SPX432N............................. 1.0%..............1.24V .................................... 3-Pin TO-92

SPX432N/TR ....................... 1.0%..............1.24V .................................... 3-Pin TO-92

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

Example: SPX432AM/TR = standard; SPX432AM-L/TR = lead free

/TR = Tape and Reel

Pack quantity is 2,000 for TO-92 and 2500 for SOT-23 and NSOIC.

CLICK HERE TO ORDER SAMPLES

Corporation

ANALOG EXCELLENCE

Sipex Corporation

Headquarters and

Sales Office

233 South Hillview Drive

Milpitas, CA 95035

TEL: (408) 934-7500

FAX: (408) 935-7600

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.

Date: 12/11/04

SPX432 1.24V Precision Adjustable Shunt Regulator

11


型号：	SPX432AM/TR
厂家：	SIPEX CORPORATION
描述：	1.24V Precision Adjustable Shunt Regulator 1.24V精密可调并联稳压器稳压器电源电路参考电压源光电二极管输出元件
文件：	总11页 (文件大小：139K)
中文：	中文翻译
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SPX432AM/TR [SIPEX]

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