ANPEC APL431CKI-TRL, APL431CKI-TR, APL431CKI-TBL, APL431CKI-TB, APL431CKI-PBL Datasheet

APL431

Adjustable Precision Shunt Regulator

Features General Description

••

•

Precise Reference Voltage to 2.500V

••

••

•

Guaranteed 0.5%, 1% or 2% Reference

••

Voltage Tolerance

••

•

Sink Current Capability, 1mA to 100mA

••

••

•

Quick Turn-on

••

••

•

Adjustable Output Voltage, VO = V

••

••

• Low Operational Cathode Current, 250µA

••

to 20V

ref

Typical

••

• 0.1Ω Typical Output Impedance

••

••

• SOT-23, SOT-23-5, SOT-89, SO-8, TO-92

••

and TO-92S Packages

Applications

••

• Linear Regulators

••

••

• Adjustable Power Supply

••

The APL431 is a 3-terminal adjustable voltage refer­ence with specified thermal stability over applicable
commercial temperature ranges. Output voltage may
be set to any value between V

(2.5 V) and 20 V with

ref

two external resistors (see Figure 2). When used
with an photocoupler, the APL431 is an ideal voltage
reference in isolated feedback circuits for 2.5V to 12V
switching-mode power supplies. This device has a

typical output impedance of 0.1Ω. Active output cir­cuitry provides a very sharp turn-on characteristic,

making the APL431 excellent replacements for ze­ner diodes in many applications, including on-board
regulation and adjustable power supplies.

ANODE

3

12

REF

CATHODE

SOT-23 (Top View)

NC NC

45

123

REF ANODE

CATHODE

SOT-23-5 (Top View)

••

• Switching Power Supply

••

123

CATHODE

ANODE

ANODE

Symbol

REF

CathodeAnode

Functional Diagram

Cathode

REF

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.

Copyright  ANPEC Electronics Corp.
Rev. C.1 - Jun., 2003

+

_

ref

V

Anode

REF ANODE CATHODE

SOT-89 (Top View)

CATHODE

3

ANODE

2

1

REF

TO-92 (Top View)

1

8

REF

2

7

ANODE

3

6

ANODE

4

NC

NC

5

SO-8 (Top View)

CATHODE

3

ANODE

2

1

REF

TO-92S (Top View)

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APL431

Ordering and Marking Information

APL431

APL431 A/B :

APL431 D/K :

431

APL431
XXXXX

XXXXX

Lead Free Code

Handling Code

Temp. Range

Package Code

Elec. Grade

- Date Co de

Elec. Grade
A : 0.5% Reference Voltage Tolerance
B : 1 % R efe ren ce V oltage To leranc e
C : 2 % R eferen ce V oltage To leranc e
Package C ode
A : S O T-23 B : S O T-2 3-5 D : S O T -89
E : T O -92 I : TO-92S K : SO -8
Y : C hip F orm
Temp. Range
C : 0 to 70 C I : -40 to 85 C
Handling Code
PB : P lastic Bag T B : Ta pe & B o x
TR : Ta pe & Reel

Lead Free Code
L : Lead Free Device
Blank : Orginal Device

AP L4 3 1 E /I :

°

APL
431
XXXXX

°

XXXXX - Date Code

Absolute Maximum Ratings

Symbol Parameter Rating Unit

V

KA

I

K

I

REF

θ

JA

T

A

T

j

T

STG

T

SOL

Cathode voltage
Continuous cathode current range
Reference current range

Thermal Resistance from Junction to Ambient in Free Air
SOT-23
SOT-23-5
SOT-89
TO-92
SO-8
Ambient temperature range APL431XXC
APL431XXI
Junction temperature range APL431XXC
APL431XXI

Storage Temperature Range

Lead temperature range, Ts (Soldering, 10sec)

Original Device

Lead Free Device

20 V

100 mA

3mA

416
357
250
250
210

0 to 70

-40 to 85
0 to 150

-40 to 150

-65 to 150

260
300

°C/W

°C

°C

°C

°C

Copyright  ANPEC Electronics Corp.
Rev. C.1 - Jun., 2003

www.anpec.com.tw2

APL431

Electrical Characteristics (Cont.) T

Symbol Parameter Test Conditions

APL431A 2.487 2.500 2.513

,

APL431B 2.475 2.500 2.525V

1

APL431C

=10mA

1

1

REF

REF

*1

= 0V

REF

+ 50mV

*2

REF

/ T

V

∆

REF

/ ∆V

V

∆

REF

I

REF

/T

I

∆

REF

I

K(min)

I

K(off)

Reference voltage

Reference voltage
drift over temp. range

Voltage ratio (open

KA

loop gain)

Reference current

Reference current
drift

Min. cathode current VKA=V
Off-state cathode

current

|ZKA| Dynamic impedance

I

K

Cathode current VKA=V

V

KA=VREF

I

=10mA*

K

V

KA=VREF,IK

T

=0 to 70°C*

A

TA =-40 to 85°C*
IK=10mA, VKA=V

=10mA, VKA=V

I

K

I

=10mA,

K

=10kΩ, R2=open

R

1

=10mA, R1=10kΩ,

I

K

=open, TA= -40 to 85°C

R

2

REF

V

= 20V, V

KA

V

KA=VREF

IK=1mA to 100mA, f ≤1kHz

REF

= 25°C ( unless otherwise noted)

A

APL431

Min. Typ. Max.

2.450 2.500 2.550

to 10V
to 20V

*2

*2

*2

-1.5 -3

-1.2 -2.5

1.0 3

*2

0.3 1

0.25 0.5 mA

*3

*1

0.1 1

0.1 0.4

Unit

V

20

mV

30

mV/V

µ

µ

µ

Ω

100 mA

A

A

A

Notes : *1 : use Figure 1

*2 : use Figure 2
*3 : use Figure 3

Copyright  ANPEC Electronics Corp.
Rev. C.1 - Jun., 2003

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APL431

Test figures

IN

V

REF

V

Figure 1. Test Circuit for VKA=V

V

IN

R1

R2

I

REF

REF

V

Figure 2. Test Circuit for VKA>V
VO= VKA= V

× (1+R1/R2) + I

REF

K

I

, VO=VKA=V

REF

I

K

,

REF

REF

V

o

× R

V

IN

I

K(off)

REF

V

o

1

Figure 3. Test Circuit for I

K(off)

V

o

Application schematic

5-Volt Precision Regulator

V

IN

b

R

∗ R

should provide cathode current large than

b

1mA to maintain APL431 work properly.

Copyright  ANPEC Electronics Corp.
Rev. C.1 - Jun., 2003

27.5k

0.1%

27.5k

0.1%

o

V

Ω

Ω

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APL431

Typical Characteristics

Reference Input Current vs. Temperature

2

1.5

1

0.5

Reference Input Current (µA)

0

-40-200 20406080100

Temperature (°C)

Cathode Current vs. Cathode Voltage

800

600

400

200

0

Cathode Current (mA)

-200

-1 0 1 2 3

Cathode Voltage (V)

Cathode Current vs. Cathode Voltage

800

600

400

200

Cathode Current (µA)

0

-200

-1 0 1 2 3

IK-MIN

Cathode Voltage (V)

Reference Voltage vs. Temperature

2.52

2.515

2.51

2.505

2.5

2.495

2.49

2.485

2.48

Reference Voltage (V)

2.475

2.47

-40

-20

20 40 60 80 100

0

Temperature (°C)

Copyright  ANPEC Electronics Corp.
Rev. C.1 - Jun., 2003

www.anpec.com.tw5