AP431AW-B - DIODES Incorporated - Datasheet.Directory

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 1 of 13 AUGUST 2006

www.diodes.com © Diodes Incorporated

Features

• Precision reference voltage

AP431 : 2.495V ± 1%

AP431A : 2.495V ± 0.5%

• Sink current capability: 200mA

• Minimum cathode current for regulation: 300µA

• Equivalent full-range temp coefficient: 30 ppm/oC

• Fast turn-on response

• Low dynamic output impedance: 0.2Ω

• Programmable output voltage to 36V

• Low output noise

• Packages: TO92-3L, SOT89-3L, SOP-8L, SOT23,

SOT25, SC-59

Ordering Information

Description

The AP431 and AP431A are 3-terminal adjustable precision

shunt regulators with guaranteed temperature stability over the

applicable extended commercial temperature range. The output

voltage may be set at any level greater than 2.495V (VREF) up to

36V merely by selecting two external resistors that act as a

voltage divider network. These devices have a typical output

impedance of 0.2Ω. Active output circuitry provides very sharp

turn-on characteristics, making these devices excellent improved

replacements for Zener diodes in many applications.

The precise (+/-) 1% Reference voltage tolerance of the

AP431/AP431A make it possible in many applications to avoid

the use of a variable resistor, consequently saving cost and

eliminating drift and reliability problems associated with it.

A P 4 3 1 X XXX

Package Packing

-7/-13 : Taping

Blank : SOP-8L

SA : SOT23

W:SC59

R:SC59

Q:SOT25

Lead-Free

Blank : Standard

L : Lead-Free

G : Green

Tolerance:

Blank : +/- 1%

A : +/- 0.5%

Reference Voltage

(Note1)

-U : Tube

-B : Bulk

V : TO92-3L

Y : SOT89-3L

-A : Ammo Box

Note: 1. Only for SOT23 and SC59

7” Tape and Reel 13” Tape and Reel Ammo Box

Device

(Note 2) Package

Code Packaging

(Note 3) Quantity Part

Number

Suffix Quantity Part

Number

Suffix Quantity Part

Number

Suffix

AP431(A)SA SA SOT23 3000/Tape & Reel -7 10000/Tape & Reel -13 NA NA

AP431(A)Q Q SOT25 3000/Tape & Reel -7 10000/Tape & Reel -13 NA NA

AP431(A)W W SC59 3000/Tape & Reel -7 10000/Tape & Reel -13 NA NA

AP431(A)R R SC59 3000/Tape & Reel -7 10000/Tape & Reel -13 NA NA

AP431(A) SOP-8L NA NA 2500/Tape & Reel -13 NA NA

AP431(A)Y Y SOT89-3L NA NA 2500/Tape & Reel -13 NA NA

AP431(A)V V TO92-3L NA NA NA NA 2000/Box -A

Notes: 2. Suffix “A” denotes AP431A device.

3. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 2 of 13 AUGUST 2006

www.diodes.com © Diodes Incorporated

Typical Application Circuit

REF (R)

VREF

+

-

Anode (A)

Cathode (C)

REF (R)

Anode (A)

Typical Application Circuit

+

R2

R1

VOUTVIN

VOUT = (1+R1/R2)VREF

Precision Regulator

Cin Cout

AP431

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 3 of 13 AUGUST 2006

www.diodes.com © Diodes Incorporated

Pin Configuration

Package Pin Configuration (Top View )

SOT 25

Package

4REF

5 ANODE

Pin Configuration (Top View )

NC 1

CATHODE 3

NC 2

SC-59

(Package

Code -R) ANODE 1

2REF

3 CATHODE

SC-59

(Package

Code -W) ANODE 1

3REF

2 CATHODE

SOP -8L

SOT 23 ANODE 1

2 CATHODE

3REF

1 REF

2 Anode

3 Cathode

1 REF

2 Anode

+

3 Cathode

TO92-3L

SOT89-3L

NC 5

4

18

6

7

3

2

ANODE

CATHODE

NC

ANODE

REF

ANODE

Absolute Maximum Ratings

Cathode Voltage ……………………………......…..............................……………...…...............…..……………….…….……...……….36V

Continuous Cathode Current ………………………….……...............................…………...........……………………….... -10mA ~ 250mA

Reference Input Current Range ……………..………..............……...............................……........……………….……..………........ 10mA

Operating Temperature Range …………..…….…….....………………...........…..........……………….…………......-20°C ~ 85°C

Lead Temperature………………………….……..….…….…………....…………………….............………………..….…...…............ 260°C

Storage Temperature ……………………………......…....…..........………………..…..........….…...………………...…….... -65°C ~ 150°C

Power Dissipation (Notes 4, 5) SOT23 Package………………………………………………………………………………..…. 250mW

SOT25 Package .………….....…………………….....…....………………………………...... 250mW

SC59 Package......................................................................………………....……........…. 400mW

SOP-8L Package ……………..…………….......……………………………………...…....…. 600mW

SOT89-3L Package ................................................................ ………....……........…. 800mW

TO92-3L Package …….…………..…………….......………………………………...…....…. 780mW

Note 4. TJ, max =150°C

Note 5. Ratings apply to ambient temperature at 25°C

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 4 of 13 AUGUST 2006

www.diodes.com © Diodes Incorporated

Electrical Characteristics ( TA = 25oC, V+ = +5.0V, unless otherwise stated )

PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT

Reference voltage VKA = VREF,

I KA = 10mA (Fig.1)

AP431

AP431A VREF 2.470

2.482 2.495 2.520

2.507 V

Deviation of Reference input voltage over

temperature (Note 6)

VKA = VREF, IKA = 10mA,

Ta = Full range (Fig.1) VREF ⎯ 8.0 20 mV

VKA = 10V ~VREF ∆VREF ⎯ -1.4 -2.0 mV/V

Ratio of the change in Reference voltage to

the change in Cathode voltage IKA = 10mA (Fig.2) VKA= 36V ~10V ∆VKA ⎯ -1 -2 mV/V

Reference input current R1 = 10KΩ,R2 = ∞ IKA= 10mA (Fig.2) IREF ⎯ 1.4 3.5 µA

Deviation of Reference input current over

temperature

R1 = 10KΩ,R2 = ∞ IKA = 10mA

Ta = Full range (Fig.2) αIREF ⎯ 0.4 1.2 µA

Minimum Cathode current for regulation VKA = VREF (Fig.1) IKA(MIN) ⎯ 0.19 0.5 mA

Off-state current VKA = 36V, VREF = 0V (Fig.3) IKA(OFF) ⎯ 0.1 1.0 µA

Dynamic output impedance (Note 7)

V KA = VREF V KA = VREF

∆IKA = 0.1mA ~ 15Ma

Frequency

≤

1KHz (Fig.1)

|ZKA| ⎯ 0.2 0.5 Ω

VMAX

VMIN

TIT2

Temperature

VDEV = VMAX - VMIN

Note: 6. Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference over the full temperature

range. The average temperature coefficient of the reference input voltage αVREF is defined as:

12

6

REF

DEV

REF TT

10)

C)(25V

V

(

V−

⋅

°

=α ……………………..……………….. ( )

C

ppm

°

Where:

T2 – T1 = full temperature change.

αVREF can be positive or negative depending on whether the slope is positive or negative.

Note: 7. The dynamic output impedance, RZ, is defined as:

KA

KA I

V

Z∆

∆

=

When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output impedance of the overall

circuit, is defined as:

)

R2

R1

(1Z

i

v

ZKA

'

KA +

∆

=≈

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 5 of 13 AUGUST 2006

www.diodes.com © Diodes Incorporated

Test Circuits

Input

VREF

VKA

IKA

Fig 1. Test Circuit for VKA= VREF

IN

VREF

R1

R2

IREF

Note:VKA=VREF(1+R1/R2)+IREFxR1

IKA

VKA

Fig 2. Test Circuit for VKA > VREF

IN

VKA

IZ(OFF)

Fig 3. Test Circuit for Off-State Current

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 6 of 13 AUGUST 2006

www.diodes.com © Diodes Incorporated

Typical Performance Characteristics

Cathode Current vs Cathode Voltage

-100

0

100

-1.5 -0.5 0.5 1.5 2.5

Cathode Voltage (v)

Cathode Current (mA)

VKA =Vref

Ta=25oC

Cathode Current (uA) vs Cathode Voltage

-1

Cathode Voltage(v)

Cathode Current (uA)

-200

200

400

600

0

-0.5 0 0.5 11.5 2 2.5

VKA =Vref

Ta=25oC

Reference Voltage vs Free-Air Temperature

Free-Air Temperature (

oC)

Reference Voltage (mV)

2480

2485

2490

2495

2500

-40 80-30 -20 -10 0 10 20 30 40 50 60 70

Reference Input Current vs Free Temperature

Free-Air Temperature (oC)

Reference Input Current (uA)

1

1.2

1.4

1.6

1.8

2

-50 -25 0 25 50 75 100 125

R1=10K

IKA=10mA

Change in Reference Voltage vs Cathode Voltage

0 5 10 15 20 25 30

Cathode Voltage (V)

Change in Reference Voltage (mv)

-12

-10

-8

-6

-4

-2

0

IKA=10mA

Ta=25oC

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 7 of 13 AUGUST 2006

www.diodes.com © Diodes Incorporated

Typical Performance Characteristics ( Continued )

+

-

+

-

Output

GND

15KΩ

8.25KΩ

9µF

IKA 232Ω

Test Circuit for Voltage Amplification

Small-Signal Voltage Amplification vs Frequency

0

10

20

30

40

50

60

1K 10K 100K 1M 10M

f-Frequency-Hz

AV-Small Signal Voltage Amplification (dB)

IKA=10mA

TA=25oC

+

-

IKA

GND

Output

1KΩ

50Ω

Test Circuit for Reference Impedance

Reference Impedance vs Frequency

0.1

1

10

100

1K 10K 100K 1M 10M

f-Frequency-Hz

|ZKA |Reference Impedance (Ω)

IKA=10mA

T=25 C

A

o

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 8 of 13 AUGUST 2006

www.diodes.com © Diodes Incorporated

Typical Performance Characteristics ( Continued )

Pulse Response

0

1

2

3

4

5

6

-101234567

t-Time-µS

Input and Output Voltage-V

Input

Output

GND

Output

220Ω

50Ω

Test Circuit for Pulse Response

Pulse

Generator

f=100kHz

TA=25oC

+

-

150Ω

IKA

VBATT

CL

Test Circuit for Curve A

+

-

CL

R1=10KΩ

R2

IKA

150Ω

VBATT

Test Circuit for Curve B, C, and D

The areas under the curves represent conditions that may cause the

device to oscillate. For curves B, C, and D, R2 and V+ were adjusted

to establish the initial VKA and IKA conditions with CL=0.VBATT and

CL were then adjusted to determine the ranges of stability.

STABILITY BOUNDARY CONDITIONS†

0

10

20

30

40

50

60

70

80

90

100

0.001 0.01 0.1 1 10

CL-Load Capacitance-µF

IKA-Cathode Current-mA

A

VKA=Vref

B VKA=5V

C V

KA=10V

D V

KA=15V

A

B

C

D

Stable

TA=25oC

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 9 of 13 AUGUST 2006

www.diodes.com © Diodes Incorporated

Application Examples

VIN

+

Low Limit VREF (1 + R1B/R2B) +VBE

High Limit VREF (1 + R1A/R2A)

R1A R1B

R2A R2B VBE

Output ON when

Low Limit < < High Limit

Fig.10 Over-Voltage / Under-Voltage Protection Circuit

VIN

RCL IOUT

IOUT = VREF / RCL

Fig. 6 Current Limiter or Current

Source

IOUT

VIN

IOUT = VREF / RS

RS

Fig. 7 Constant-Current

Sink

Fig. 4 Voltage

Monitor

Fig. 5 Delay

Timer

VOUT = (1 + R1/R2) x VREF

VIN

R1

R2

Fig. 8 Higher-Current Shunt

Regulator

VOUT VIN PUSE

R1

R2

LIMIT (1 + R1/R2) x VREF

Fig. 9 Crow Bar

VOUT

VIN

ON

OFF

R

+

VIN

Delay = RC x ln ( VIN -VREF

)

LED on when Low Limit<VIN High Limit

Low Limit ≈ VREF (1+R1B/R2B)

High Limit ≈ VREF (1+R1A/R2A)

R1A

R2A

VIN

R1B

R2B

<

VIN

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 10 of 13 AUGUST 2006

Package Diagrams ( All Dimensions in mm )

(1) SOT25 (2) SC59

0.10/0.20 Typ 0.15

0.013/0.10

Typ 0.05 0.35/0.55

Typ 0.40

Typ

0.95

1.50/1.70

Typ 1.60

2.70/3.00

Typ 2.80

2.90/3.10

Typ 3.00

1.00/1.30

Typ 1.10

Typ

0.55

TOP VIEW

0.35/0.50

0.10/0.20

0.013/0.10 0.35/0.55

0.95

2.70/

3.00

2.90/3.10

1.00/

1.30

1.50/

1.70

1.90

TOP VIEW

0°/8°

(3) SOT23 (4) SOP-8L

0.37/0.51

0?8

0.45/0.60

0.013/

0.10 0.45/0.61

TOP VIEW

0.085/0.180

1.20/1.40

2.30/2.50

2.80/3.00

0.89/

1.03

0.903/

1.10

1.80/2.00

3.85/3.95

Typ 3.90

3.80/3.90

Typ 3.85

45¢X

0.60/0.70

Typ 0.65

0.15/0.25

Typ 0.20

0.60/0.80

Typ0.70

1.27

4.85/4.95

Typ 4.90

1.40/1.50

Typ 1.45

0.30/0.50

Typ 0.40

5.90/6.10

Typ 6.00

5

4

1

8

0.08/0.25

Typ 0.15

R0.1

(Allside)

9

43

0.35

°

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 11 of 13 AUGUST 2006

Package Diagrams ( Continued ) ( All Dimensions in mm )

(5) SOT89-3L

(6) T O92-3L

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 12 of 13 AUGUST 2006

Marking Information

(1) SOT23/SOT25/SC59

SOT23/SOT25/SC59

:

(Top View)

Blank : Standard

L : Lead-Free

G : G reen

XX YM X

Marking Code

D ate C ode

Lead-Free

YYear

M: Month (A~L)

(Note1)

Note: 1. Only for SOT23 and SC59

(2) SOP

Accuracy

AP431 X

YYWW X

Blank:

A:

Logo

( Top view )

%1495.2

%5.0495.2

YY : Year

WW: Nth week

Date code

Lead Free

Blank: Standard

L: Lead Free Package

G: Green

±

°

(3) SOT89-3L

SOT89-3L

:

(Top View)

Blank : Standard

L : Lead-Free

G : G reen

XX

YM X

Marking Code

D ate C ode Lead-Free

YYear

M: Month (A~L)

AP431/AP431A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP431/AP431A Rev. 1 13 of 13 AUGUST 2006

Marking Information ( Continued )

(4) T O92-3L

Accuracy AP431

X YWW X X

Blank:

A :

( Top view )

Y : Year

WW: Nth week

Date code Internal code

1%2.495 ±

0.5%2.495 ±

Blank: normal

L: Lead Free Package

Lead Free

Marking Code Table

Device Package(Note 8) Marking Code Date Code

AP431SA SOT23 D1 YM

AP431ASA SOT23 D2 YM

AP431Q SOT25 A2 YM

AP431AQ SOT25 A3 YM

AP431W SC59 A6 YM

AP431AW SC59 A7 YM

AP431R SC59 A8 YM

AP431AR SC59 A9 YM

AP431Y SOT89-3L A4 YM

AP431AY SOT89-3L A5 YM

Notes: 8. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.

IMPORTANT NOTICE

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further

notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein ; neither

does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will

agree to hold Diodes incorporated and all the companies whose products are represented on our website, harmless against all damages.

LIFE SUPPORT

Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the

President of Diodes Incorporated.