ZTL431AQFTA - DIODES INC - Datasheet.Live

ZTL431/ZTL432

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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 2 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

ZTL431_F SOT23, ZTL431_FF SOT23F

(Top View)

ZTL432_F SOT23, ZTL432_FF SOT23F

(Top View)

ZTL431_H6, SOT363

(Top View)

†Connected internally to substrate;

should be left floating or connected to Anode

ZTL431ASE5 SOT25

(Top View)

ZTL431_E5 SOT25

(Top View)

*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

 0.2 typical output impedance

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

 Adjustable Output Voltage……VREF to 20V

 Qualified to AEC-Q100 Standards for High Reliability

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

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

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

4

Ref

N/C

2

Anode

Cathode

N/C

3

15

4

Ref

N/C*

ZTL431/ZTL432

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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 Units

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 = 10 mA

TA = 0 to 70° 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 10 -1.4 -2.7

mV/V

VKA = 10V to 20V -1.0 -2.0

IREF Reference Input Current IKA = 10mA, R1 = 10k, R2 = OC 2 4 µA

IREF

IREF Deviation Over Full Temperature Range

IKA = 10mA

R1 = 10k

R2 = OC

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 

ZTL431/ZTL432

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Typical Characteristics

I

KA

=10mA

V

REF

=V

KA

0

100

200

300

400

500

600

700

800

900

1000

0 255075100125

SOT23-5

SOT23

SC70-6

SOT23F

Ambient Temperature (°C)

Power Dissipation (

m

W)

Reference Voltage vs. Temperature

Dynamic Impedance vs. Frequency

Power Dissipation Derating

ZTL431/ZTL432

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Typical Characteristics (cont.)

I

KA

I

KA

I

KA

V

KA

V

KA

V

REF

<V

KA

<20,I

KA

=10mA,T

A

=25°C

V

KA

V

KA

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

a

b

e

Stable

Pulse Response

Test Circuit for Stabilty Boundary Conditions

Test Circuit for Pulse Response

Test Circuit for Open Loop Voltage Gain

ZTL431/ZTL432

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Application Circuits

V

ON

~2V

V

OFF

=V

+

V

TH

=2.5V

Output

V+

Input

R1

R2

V

OUT

V

OUT

V+

V

REF

V

REF

R1

R2

V

OUT

V

OUT

V+

V

REF

V

REF

R1

R2

V

OUT

V

OUT

V+

V

REF

V

REF

V

OUT(MIN)

=V

REF

+V

REG

In Out

Common

ZSR***

0.01µF

30

R1

R2

V

REF

V+

V

OUT

V

OUT

V

REF

R1

R2b

R2a

V

REF

VREF

V

REF

V+

Outpu

t

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

ZTL431/ZTL432

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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 = VZ

IZ

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.

ZTL431/ZTL432

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Ordering Information

Tol. Ordering Code Pack Part Mark Status* Reel Size Tape Width

(mm)

Quantity per

Reel

1%

ZTL431AE5TA SOT25 31A Active 7”, 180mm 8 3000

ZTL431AFFTA SOT23F 31A Active 7”, 180mm 8 3000

ZTL431AFTA SOT23 31A Active 7”, 180mm 8 3000

ZTL431AQFTA (Note 4) SOT23 31A Active 7”, 180mm 8 3000

ZTL431AH6TA SOT363 31A Active 7”, 180mm 8 3000

ZTL431ASE5TA SOT25 S2A Active 7”, 180mm 8 3000

ZTL432AFFTA SOT23F 32A Active 7”, 180mm 8 3000

ZTL432AFTA SOT23 32A Active 7”, 180mm 8 3000

0.5%

ZTL431BE5TA SOT25 31B Active 7”, 180mm 8 3000

ZTL431BFFTA SOT23F 31B Active 7”, 180mm 8 3000

ZTL431BFTA SOT23 31B Active 7”, 180mm 8 3000

ZTL431BH6TA SOT363 31B Active 7”, 180mm 8 3000

ZTL432BFFTA SOT23F 32B Active 7”, 180mm 8 3000

ZTL432BFTA SOT23 32B Active 7”, 180mm 8 3000

Note: 4. Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and thermally the

same, except where specified. For more information, please refer to http://www.diodes.com/quality/product_compliance_definitions/.

Package Outline Dimensions

Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.

SOT23

SOT23F

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 0.903 1.10 1.00

K1 - - 0.400

L 0.45 0.61 0.55

M 0.085 0.18 0.11

 0° 8° -

All Dimensions in mm

SOT23F

Dim Min Max Typ

A 0.80 1.00 0.90

A1 0.00 0.10 

b 0.35 0.45 0.40

c 0.10 0.20 0.15

D 2.80 3.00 2.90

e   0.95

e1 1.80 2.00 1.90

E 2.30 2.50 2.40

E1 1.50 1.70 1.60

L 0.48 0.68 0.58

L1 0.30 0.50 0.40

R 0.05 0.15 0.10

All Dimensions in mm

A

M

JL

D

F

BC

H

K

G

K1

b (X3)

E1 E

D

A

L1

c

A1

R

L

e

e1

ZTL431/ZTL432

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Package Outline Dimensions (cont.)

Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.

SOT363

SOT25

T092

SOT363

Dim Min Max Typ

A 0.10 0.30 0.25

B 1.15 1.35 1.30

C 2.00 2.20 2.10

D 0.65 Typ

F 0.40 0.45 0.425

H 1.80 2.20 2.15

J 0 0.10 0.05

K 0.90 1.00 1.00

L 0.25 0.40 0.30

M 0.10 0.22 0.11

 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

TO92

Dim Min Max Typ

A 3.45 3.66 —

B 4.27 4.78 —

b — — 0.38

c — — 0.38

D — — 3.87

E 4.32 4.83 —

e — — 1.27

e2 2.40 2.90 —

L 12.98 15.00 —

L1 12.80 15.00 —

L2 0.80 - —

L3 2.00 3.00 —

N 1.22 1.37 —

All Dimensions in mm

A

M

JL

D

B C

H

K

F

A

M

JL

D

B C

H

KN



EJECTION

MARK

LOOSE PRODUCT

TAPED PRODUCT

EJECTION

MARK

B

E

b

e

D

N

ce2 e2

L1

E

L2

L3

A

L

ZTL431/ZTL432

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Suggested Pad Layout

Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.

SOT23

SOT23F

SOT363

SOT25

Dimensions Value (in mm)

Z 2.9

X 0.8

Y 0.9

C 2.0

E 1.35

Dimensions Value (in mm)

C 0.95

X 0.60

Y 0.80

Y1 1.80

Dimensions Value (in mm)

Z 2.5

G 1.3

X 0.42

Y 0.6

C1 1.9

C2 0.65

Dimensions Value (in mm)

Z 3.20

G 1.60

X 0.55

Y 0.80

C1 2.40

C2 0.95

XE

Y

C

Z

C

Y1

Y (3x)

X (3x)

X

Z

Y

C1

C2

G

X

Z

Y

C1

C2C2

G

ZTL431/ZTL432

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