ZETEX ZTL431, ZTL432 Technical data

ZTL431, ZTL432

3Cathode

ZTL431_F SOT23

ZTL431_FF SOT23F

(top view)

ZTL432_F SOT23

ZTL432_FF SOT23F

(top view)

Ref

Cathode

2

1 Anode

Anode

3

2

1

2

3

6

5

4

ZTL431_H6 SC70-6

(top view)

Cathode

N/C

†

REF

Anode

N/C

†

Connected internally to substrate; should be left floating or connected to Anode

NC

ZTL431_E5 SOT235

(top view)

N/C

N/C*

Cathode

Anode

Ref

1

2

3

5

4

*

must be left floating

or connected to pin 5

ZTL431ASE5 SOT235

(top view)

N/C

Cathode

Anode

Ref

1

2

3

5

4

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.

Features

• Temperature range ................ -40 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...... V

REF

to 20V

Pin connections

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 to 125°C as standard.

Applications

• Opto-coupler linearization

• Linear regulators

• Improved zener

• Variable reference

Issue 14 - January 2008 1 www.zetex.com

Ordering information

NOTES:

Tol. Order code Pack

ZTL431ACSTZ TO92

ZTL431AE5TA SOT23-5

ZTL431AFFTA SOT23F

ZTL431AFTA SOT23

1%

ZTL431AH6TA SC70-6

ZTL431ASE5TA SOT23-5

ZTL432AFFTA SOT23F

ZTL432AFTA SOT23

ZTL431BCSTZ TO92

ZTL431BE5TA SOT23-5

ZTL431BFFTA SOT23F

0.5% ZTL431BFTA SOT23

ZTL431BH6TA SC70-6

ZTL432BFFTA SOT23F

ZTL432BFTA SOT23

Part mark

ZTL431A

31A

S2A

32A

ZTL431B

31B

32B

ZTL431, ZTL432

*

Status

Obsolete Concertina N/A 1500

Active 7”, 180mm 8 3000

Obsolete Concertina N/A 1500

Active 7”, 180mm 8 3000

Reel Size

Tape width

(mm)

Quantity

per reel

* For availability of preview status devices contact your local Zetex representative

Absolute maximum ratings

Cathode voltage (VKA) .............................................................. 20V

Continuous cathode current (I

Reference input current range (I

) ........................................ 150mA

KA

)..................... -50 µA to 10mA

REF

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.

Unless otherwise stated voltages specified are relative to the ANODE pin.

Package thermal data

Package ⍜

JA

T

A

TO92 160°C/W 780mW

SOT23 380°C/W 330mW

SOT23F 138°C/W 900mW SOT23-5 250°C/W 500mW SOT70-6 380°C/W 330mW

P

DIS

=25°C, TJ = 150°C

Issue 14 - January 2008 2 www.zetex.com

ZTL431, ZTL432

Recommended operating conditions

Min Max Units

V

I

T

KA

A

Cathode voltage V

ref

Cathode current 1 100 mA

Operating ambient temperature range -40 125 °C

Electrical characteristics

Electrical characteristics over recommended operating conditions, TA = 25°C, unless otherwise stated.

20 V

Symbol

V

REF

V

DEV

ΔV

REF

ΔV

KA

I

REF

ΔI

REFIREF

I

KA(MIN)

I

KA(OFF)

R

Z

Parameter Conditions Min. Typ. Max. Units

Reference voltage VKA = V

IKA = 10mA

Deviation of reference voltage over full temperature range

= V

V

KA

= 10 mA

I

KA

Ratio of change in reference voltage

= 10mA

I

KA

to the change in

REF

ZTL43_A 2.475 2.5 2.525 V ZTL43_B 2.487 2.5 2.513

= 0 to 70° 6 16

T

A

= -40 to 85°C 14 34

T

A

T

= -40 to 125°C 14 34

A

V

= V

KA

V

= 10V to 20V -1.0 -2.0

KA

to 10 -1.4 -2.7 mV/V

REF

mV

cathode voltage Reference input

current

deviation over full

temperature range

Minimum cathode

IKA = 10mA, R1 = 10k⍀

= OC

R

2

I

= 10mA

KA

R

= 10k⍀

1

= OC

R

2

VKA = V

REF

= 0 to 70°C 0.8 1.2

T

A

= -40 to 85°C 0.8 2.5

T

A

T

= -40 to 125°C 0.8 2.5

A

24µA

µA

0.4 0.6 mA

current for regulation Off state current V

Dynamic output

= 20V, V

KA

VKA = V

= 0V 0.1 0.5 µA

REF

, f = 0Hz 0.2 0.5 ⍀

REF

impedance

Issue 14 - January 2008 3 www.zetex.com

Typical characteristics

0

100

200

300

400

500

600

700

800

900

1000

0255075100125

SOT23-5

SOT23

SC70-6

TO92

SOT23F

ZTL431, ZTL432

I

= 10mA

KA

= V

V

REF

KA

Power dissipation (mW)

Issue 14 - January 2008 4 www.zetex.com

Ambient temperature (°C)