AP432SNF-13 - DIODES Incorporated

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 1 of 12 AP432/AP432A

www.diodes.com © Diodes Incorporated

Features

• Precision reference voltage

AP432 : 1.24V ± 1%

AP432A : 1.24V ± 0.5%

• Sink current capability: 200mA with PowerDITM5

package

• 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 20V

• Low output noise

• Packages: SOT-23. SC-59, PowerDITM5 and DFN under

development

Ordering Information

Description

The AP432 and AP432A 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

AP432/AP432A 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.

7” Tape and Reel 13” Tape and Reel

Device

(Note 1) Package

Code Packaging Quantity Part

Number

Suffix

Quantity Part

Number

Suffix

AP432(A)SA SA SOT-23 3000/Tape & Reel -7 10,000/Tape & Reel -13

AP432(A)SN SN SC-59 3000/Tape & Reel -7 10,000/Tape & Reel -13

AP432(A)PB PB

PowerDI™5 NA NA 5000/Tape & Reel -13

AP432(A)FB FB DFN 3000/Tape & Reel -7 10,000/Tape & Reel -13

Typical Application Circuit

+

R2

R1

VOUTVIN

VOUT = (1+R1/R2)VREF

Precision Regulator

Cin Cout

DP432

Notes: 1. Suffix “A” denotes AP432A device.

2. 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.

A P 4 3 2 A X X X

Package Packing

Blank : Tube or bulk

-7/-13 : Taping

SA : SOT23

SN : SC-59

PB : PowerDI™5

FB : DFN

Lead-Free

F : Lead-Free

G : Green

Tolerance:

Blank : +/- 1%

A : +/- 0.5%

Reference Voltage

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 2 of 12 AP432/AP432A

www.diodes.com © Diodes Incorporated

Block Diagram Symbol

REF (R)

V

REF

+

-

Anode (A)

Cathode (C)

REF (R)

Anode (A)

Pin Configuration

Package Pin Configuration (Top View)

PowerDI™5

Package Pin Configuration (Top View)

DFN

SOT23 ANODE 1

2 REF

3 CATHODE

SC-59 ANODE 1

3 CATHODE

2 REF

3 CATHODE

2 REF

ANODE 1

2 REF

3 CATHODE

ANODE 1

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 3 of 12 AP432/AP432A

www.diodes.com © Diodes Incorporated

Absolute Maximum Ratings

Cathode Voltage ……………………………......…..............................……………...…...............……………………..…..…...……….20V

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

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

Operating Temperature Range (AP432)…………..…….…….....………………...........…............………………….….…....-20°C ~ 85°C

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

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

Power Dissipation (Notes 3, 4) SOT-23 Package…………………..…………………………….………...…………. 300mW

SC-59 Package................................................................………........................ 400mW

PowerDI™5 Package ….…………..………................….....………...................… 900mW

DFN Package....................................................................……………………..... 250mW

Note 3. TJ, max =150°C

Note 4. Ratings apply to ambient temperature at 25°C

Electrical Characteristics (TA=25oC, V+=+5.0V, unless otherwise stated) (Note 5)

PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT

Reference voltage VKA = VREF,

I KA = 10mA (Fig.1)

AP432

AP432A VREF 1.227

1.233

1.240

1.252

1.246 V

Deviation of Reference input voltage over

temperature (Note 5)

VKA = VREF, IKA = 10mA,

Ta = Full range (Fig.1) VREF ⎯ 3.0 20 mV

Ratio of the change in Reference voltage to

the change in Cathode voltage IKA = 10mA (Fig.2) VKA = 20V ~VREF ∆VREF ⎯ -1.4 2.0 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) ⎯ 0.15 0.3 mA

Off-state current VKA = 20V, VREF = 0V (Fig.3) IKA(OFF) ⎯ 0.1 1.0 µA

Dynamic output impedance V KA = VREF V KA = VREF

Frequency

≤

1KHz (Fig.1) KA

Z ⎯ 0.2 0.5 Ω

V

MAX

V

MIN

T

I

T

2

TEMPERATURE

V

DEV

= V

MAX

- V

MIN

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 4 of 12 AP432/AP432A

www.diodes.com © Diodes Incorporated

Note 5. 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 4. 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 +

∆

=≈

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

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 5 of 12 AP432/AP432A

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

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 6 of 12 AP432/AP432A

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

1

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 7 of 12 AP432/AP432A

www.diodes.com © Diodes Incorporated

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

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 8 of 12 AP432/AP432A

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

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 9 of 12 AP432/AP432A

Package Diagrams (All Dimensions in mm)

(1) PowerDI™5 (2) SOT-23

5.30/5.45

1.05/

1.15

0.33/0.43

3.90/

4.05

1.70/

1.88

0.80/

0.99

0.80/

0.99

0.50/

0.65

0.50/

0.65

6.40/6.60

6.40/

6.60

0.80/0.99

3.90/4.05

1.70/1.88

1.84 NOM 1.84 NOM

3.05 NOM

0.75/0.95

3.55

NOM

0.50/0.65

1.20/1.50

(3) DFN1006-3 (4) SC-59

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°

0.35

0.20/0.30

Typ 0.25

0.55/0.65

Typ 0.60

0.45/0.55

Typ 0.50

0/0.05 Typ 0.03

0.20/0.30

Typ 0.25

0.10/0.20

Typ 0.15

0.95/1.05

Typ 1.00

0.95/1.05

Typ 1.00

Typ

0.40

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

G

0.89/

1.03

0.903/

1.10

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 10 of 12 AP432/AP432A

Marking Information

(1) SOT-23/SC-59

XX

YM

Y : Year

M : Month (1~D)

(Top View)

X : Blank : Lead Free

G : Green

X

Marking Code

Date Code

(2) PowerDI™5

Accuracy

Logo

( Top view )

Y : Year

WW: Nth w eek

Date code

Lead Free

Blank : Lead Free

G : Green

YWW X

AP432 X

Blank :

A :

%1495.2

±

%5.0495.2

±

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 11 of 12 AP432/AP432A

(3) DFN

( Top view )

Lead Free

Blank : Lead Free

Green : Underlined First code

XX

Marking Code

Date Code Key

Year 2006 2007 2008 2009 2010

Code T U V W X

Month Jan Feb March Apr May Jun Jul Aug Sep Oct Nov Dec

Code 1 2 3 4 5 6 7 8 9 O N D

Marking Code Table

Notes: 6. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.

PowerDI is a trademark of Diodes Incorporated.

Device Package Marking Code Da te Code

AP432FB DFN D3 ⎯

AP432AFB DFN D4 ⎯

AP432SA SOT-23 D3 YM

AP432ASA SOT-23 D4 YM

AP432SN SC-59 D3 YM

AP432ASN SC-59 D4 YM

AP432APB PowerDI™5 AP432 YWW

AP432APB PowerDI™5 AP432A YWW

AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

DS30748 Rev. 1 - 2 12 of 12 AP432/AP432A