ZTL431AH6TA - DIODES INC

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

1 of 12

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August 2017

ZTL431/ZTL432

COST EFFECTIVE ADJUSTABLE PRECISION SHUNT REGULATOR

Description

The ZTL431 and ZTL432 are three terminal adjustable shunt

regulators offering excellent temperature stability and output current

handling capability up to 100mA. The output voltage may be set to

any chosen voltage between 2.5 and 20 volts by selection of two

external divider resistors.

The devices can be used as a replacement for zener diodes in many

applications requiring an improvement in zener performance.

The ZTL432 has the same electrical specifications as the ZTL431 but

has a different pin out in SOT23 (F-suffix) and SOT23F (FF-suffix).

Both variants are available in two grades with initial tolerances of 1%

and 0.5% for the A and B grades, respectively.

These are functionally equivalent to the TL431/TL432 except for

maximum operation voltage, and have an ambient temperature range

of -40°C to +125°C as standard.

Pin Assignments

(Top View)

SOT23, SOT23F

(ZTL431)

(Top View)

SOT23, SOT23F

(ZTL432)

(Top View)

SOT363

†Connected internally to substrate;

should be left floating or connected to Anode

(Top View)

SOT25 (SE5 Package)

(Top View)

SOT25 (E5 Package)

*must be left floating or

connected to pin 5

Features

 Temperature Range ................ -40°C to +125°C

 Reference Voltage Tolerance at +25°C

 0.5%.......................................B grade

 1% .........................................A grade

 0.2Ω Typical Output Impedance

 Sink Current Capability…….. 1mA to 100mA

 Adjustable Output Voltage……VREF to 20V

 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

 Halogen and Antimony Free. “Green” Device (Note 3)

 An Automotive-Compliant Part is Available Under Separate

Datasheet (ZTL431AQ, ZTL431BQ, ZTL432AQ, ZTL432BQ)

Applications

 Opto-Coupler Linearization

 Linear Regulators

 Improved Zener

 Variable Reference

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-free "Green" products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)

and <1000ppm antimony compounds.

Anode

Cathode

Ref 2

1

3

Anode

Cathode

Ref 2

1

3

Anode

Cathode

Ref

2

1

3

Cathode

Ref

N/C†N/C†

NC

Anode

3

2

1

4

5

6

Cathode

2

Anode

Cathode

N/C

3

15

4Ref

N/C

2

Anode

Cathode

N/C

3

15

4Ref

N/C*

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

2 of 12

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August 2017

ZTL431/ZTL432

Absolute Maximum Ratings (Voltages specified are relative to the Anode pin unless otherwise stated.)

Parameter

Rating

Unit

Cathode Voltage (VKA)

20

V

Continuous Cathode Current (IKA)

150

mA

Reference Input Current Range (IREF)

-50µA to +10mA

—

Operating Junction Temperature

-40 to +150

°C

Storage Temperature

-55 to +150

°C

Operation above the absolute maximum rating may cause device failure.

Operation at the absolute maximum ratings, for extended periods, may reduce device reliability.

Package Thermal Data

Package

JA

PDIS

TA = +25°C, TJ = +150°C

SOT23

380°C/W

330mW

SOT23F

138°C/W

900mW

SOT25

250°C/W

500mW

SOT363

380°C/W

330mW

Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)

Symbol

Parameter

Min

Max

Unit

VKA

Cathode Voltage

VREF

20

V

IKA

Cathode Current

1

100

mA

TA

Operating Ambient Temperature Range

-40

+125

°C

Electrical Characteristics (@TA = +25°C, unless otherwise specified.)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VREF

Reference Voltage

VKA = VREF

IKA = 10mA

ZTL43_A

2.475

2.5

2.525

V

ZTL43_B

2.487

2.5

2.513

VDEV

Deviation of Reference Voltage Over Full

Temperature Range

VKA = VREF

IKA = 10mA

TA = 0 to +70°C

—

6

16

mV

TA = -40 to +85°C

—

14

34

TA = -40 to +125°C

—

14

34

VREF

VKA

Ratio of Change In Reference Voltage

To the Change In Cathode Voltage

IKA = 10mA

VKA = VREF to 10V

—

-1.4

-2.7

mV/V

VKA = 10V to 20V

—

-1.0

-2.0

IREF

Reference Input Current

IKA = 10mA, R1 = 10kΩ,

R2 = O/C (Open Circuit)

—

2

4

µA

IREF

IREF Deviation Over Full Temperature Range

IKA = 10mA

R1 = 10kΩ

R2 = O/C (Open

Circuit)

TA = 0 to +70°C

—

0.8

1.2

µA

TA = -40 to +85°C

—

0.8

2.5

TA = -40 to +125°C

—

0.8

2.5

I

KA(MIN)

Minimum Cathode Current for Regulation

VKA = VREF

—

0.4

0.6

mA

IKA(OFF)

Off State Current

VKA = 20V, VREF =

0V

—

0.1

0.5

µA

RZ

Dynamic Output Impedance

VKA = VREF, f = 0Hz

—

0.2

0.5

Ω

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

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ZTL431/ZTL432

Typical Characteristics

IKA= 10mA

VREF=VKA

0

100

200

300

400

500

600

700

800

900

1000

0 25 50 75 100 125

SOT23-5

SOT23

SC70-6

SOT23F

Ambient Temperature (°C)

Power Dissipation (mW)

Reference Voltage vs. Temperature

Dynamic Impedance vs. Frequency

Power Dissipation Derating

SOT25

SOT363

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

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ZTL431/ZTL432

Typical Characteristics (Cont.)

IKA

VKA

VREF < VKA < 20, IKA = 10mA, TA= 25°C

VKA

Stability Boundary Condition

0

10

20

30

40

50

60

70

80

90

100

10.0E-12 100.0E-12 1.0E-9 10.0E-9 100.0E-9 1.0E-6

Load Capacitance (F)

Cathode Current (mA)

Gain vs. Frequency

0

10

20

30

40

50

60

100 1000 10000 100000 1000000

Frequency (Hz)

Gain (dB)

Stable

Pulse Response

Test Circuit for Stabilty Boundary Conditions

Test Circuit for Pulse Response

Test Circuit for Open Loop Voltage Gain

VREF < VKA < 20V, IKA = 10mA, TA = +25°C

Test Circuit for Stability Boundary Conditions

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

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August 2017

ZTL431/ZTL432

Application Circuits

VON~2V

VOFF = V+

VTH = 2.5V

Output

V+

Input

R1

R2

VOUT

V+

VREF

R1

R2

VOUT

V+

VREF

R1

R2

VOUT

V+

VREF

VOUT(MIN) = VREF + VREG

In Out

Common

ZSR***

0.01µF

30Ω

R1

R2

VREF

V+

VOUT

VOUT VREF

R1 R1

R2b

R2a

VREF

V+

Output

Shunt regulator

Output control of a three

terminal fixed regulator

Single supply comparator

with temperature

compensated threshold

Higher current shunt

regulator

Series regulator

Over voltage / under voltage

protection circuit

R1A

R1B

R2A

R2B

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

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ZTL431/ZTL432

DC Test Circuits

Notes

Deviation of reference input voltage, VDEV, is defined as the

maximum variation of the reference input voltage over the full

temperature range.

The average temperature coefficient of the reference input

voltage, VREF is defined as:

VREF(ppm/°C) = VDEV  1,000,000

VREF(T1-T2)

The dynamic output impedance, Rz, is defined as:

RZ = ΔVZ

ΔIZ

When the device is programmed with two external resistors, R1

and R2, (Figure 2), the dynamic output impedance of the

overall circuit, R'z, is defined as:

R'Z = RZ (1 + R1 )

R2

Stability Boundary

The ZTL431 and ZTL432 are stable with a range of capacitive

loads. A zone of instability exists as demonstrated in the typical

characteristic graph on page 4. The graph shows typical

conditions. To ensure reliable stability, a capacitor of 4.7nF or

greater is recommended between anode and cathode.

VMAX

VMIN

VDEV = VMAX - VMIN

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

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ZTL431/ZTL432

Ordering Information

E5/SE5 : SOT25

ZTL43X X X X

Packing

Package

TA : 7" Tape & Reel

Pinout Variation Tolerance

A : ±1.0%

B : ±0.5% FF : SOT23F

F : SOT23

H6 : SOT363

1 : Standard Pin Out

2 : Reversed Pin Out

in SOT23/SOT23F

Tol.

Part Number

Package

Part Mark

Status

Reel Size

Tape Width

(mm)

Quantity per

Reel

1%

ZTL431AE5TA

SOT25

31A

Active

7”, 180mm

8

3,000

ZTL431AFFTA

SOT23F

31A

Active

7”, 180mm

8

3,000

ZTL431AFTA

SOT23

31A

Active

7”, 180mm

8

3,000

ZTL431AH6TA

SOT363

31A

Active

7”, 180mm

8

3,000

ZTL431ASE5TA

SOT25

S2A

Active

7”, 180mm

8

3,000

ZTL432AFFTA

SOT23F

32A

Active

7”, 180mm

8

3,000

ZTL432AFTA

SOT23

32A

Active

7”, 180mm

8

3,000

0.5%

ZTL431BE5TA

SOT25

31B

Active

7”, 180mm

8

3,000

ZTL431BFFTA

SOT23F

31B

Active

7”, 180mm

8

3,000

ZTL431BFTA

SOT23

31B

Active

7”, 180mm

8

3,000

ZTL431BH6TA

SOT363

31B

Active

7”, 180mm

8

3,000

ZTL432BFFTA

SOT23F

32B

Active

7”, 180mm

8

3,000

ZTL432BFTA

SOT23

32B

Active

7”, 180mm

8

3,000

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

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ZTL431/ZTL432

Marking Information

(1) SOT23 and SOT23F

(Top View)

(2) SOT25

(Top View)

(3) SOT363

(Top View)

Part Number

Identification Code

ZTL431AFFTA

31A

ZTL431AFTA

31A

ZTL432AFFTA

32A

ZTL432AFTA

32A

ZTL431BFFTA

31B

ZTL431BFTA

31B

ZTL432BFFTA

32B

ZTL432BFTA

32B

Part Number

Identification Code

ZTL431AE5TA

31A

ZTL431ASE5TA

S2A

ZTL431BE5TA

31B

Part Number

Identification Code

ZTL431AH6TA

31A

ZTL431BH6TA

31B

1

23

XXX

12 3

4

5

XXX

123

4

56

XXX

XXX : Identification Code

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

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ZTL431/ZTL432

Package Outline Dimensions

Please see http://www.diodes.com/package-outlines.html for the latest version.

(1) Package Type: SOT23

J

K1 K

L1

GAUGE PLANE

0.25

H

L

M

All 7°

A

CB

D

G

F

a

(2) Package Type: SOT23F

E1

D

b

E

L1

A

R

b

e1

e

c

k

L

A1

SOT23

Dim

Min

Max

Typ

A

0.37

0.51

0.40

B

1.20

1.40

1.30

C

2.30

2.50

2.40

D

0.89

1.03

0.915

F

0.45

0.60

0.535

G

1.78

2.05

1.83

H

2.80

3.00

2.90

J

0.013

0.10

0.05

K

0.890

1.00

0.975

K1

0.903

1.10

1.025

L

0.45

0.61

0.55

L1

0.25

0.55

0.40

M

0.085

0.150

0.110

a

0°

8°

--

All Dimensions in mm

SOT23F

Dim

Min

Max

Typ

A

0.80

1.00

0.90

A1

0.00

0.10

0.01

b

0.35

0.50

0.44

c

0.10

0.20

0.16

D

2.80

3.00

2.90

e

0.95 REF

e1

1.90 REF

E

2.30

2.50

2.40

E1

1.50

1.70

1.65

k

1.20

-

L

0.30

0.65

0.50

L1

0.30

0.50

0.40

R

0.05

0.15

-

All Dimensions in mm

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

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ZTL431/ZTL432

Package Outline Dimensions (Cont.)

Please see http://www.diodes.com/package-outlines.html for the latest version.

(3) Package Type: SOT363

e

D

L

E1

b

E

F

A2

A1

ca

(4) Package Type: SOT25

SOT363

Dim

Min

Max

Typ

A1

0.00

0.10

0.05

A2

0.90

1.00

b

0.10

0.30

0.25

c

0.10

0.22

0.11

D

1.80

2.20

2.15

E

2.00

2.20

2.10

E1

1.15

1.35

1.30

e

0.650 BSC

F

0.40

0.45

0.425

L

0.25

0.40

0.30

a

0°

8°

--

All Dimensions in mm

SOT25

Dim

Min

Max

Typ

A

0.35

0.50

0.38

B

1.50

1.70

1.60

C

2.70

3.00

2.80

D

-

0.95

H

2.90

3.10

3.00

J

0.013

0.10

0.05

K

1.00

1.30

1.10

L

0.35

0.55

0.40

M

0.10

0.20

0.15

N

0.70

0.80

0.75



0°

8°

-

All Dimensions in mm

A

M

JL

D

B C

H

KN

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

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ZTL431/ZTL432

Suggested Pad Layout

Please see http://www.diodes.com/package-outlines.html for the latest version.

(1) Package Type: SOT23

X

Y

Y1 C

X1

(2) Package Type: SOT23F

X

Y

Y1

C

(3) Package Type: SOT363

Y1 G

Y

X

C

Dimensions

Value (in mm)

C

2.0

X

0.8

X1

1.35

Y

0.9

Y1

2.9

Dimensions

Value

(in mm)

C

0.95

X

0.80

Y

1.110

Y1

3.000

Dimensions

Value

(in mm)

C

0.650

G

1.300

X

0.420

Y

0.600

Y1

2.500

ZTL431/ZTL432

Document number: DS33263 Rev. 18 - 2

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ZTL431/ZTL432

Suggested Pad Layout (Cont.)

Please see http://www.diodes.com/package-outlines.html for the latest version.

(4) Package Type: SOT25

IMPORTANT NOTICE

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,

INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes

without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the

application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or

trademark rights, nor the rights of others. Any Customer or user of this document or products described herein 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 Diodes Incorporated

website, harmless against all damages.

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.

Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and

hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or

indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.

Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings

noted herein may also be covered by one or more United States, international or foreign trademarks.

This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the

final and determinative format released by Diodes Incorporated.

LIFE SUPPORT

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express

written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:

A. Life support devices or systems are devices or systems which:

1. are intended to implant into the body, or

2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the

labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the

failure of the life support device or to affect its safety or effectiveness.

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and

acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any

use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related

information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its

representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.

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Dimensions

Value

Z

3.20

G

1.60

X

0.55

Y

0.80

C1

2.40

C2

0.95

X

Z

Y

C1

C2C2

G