ANPEC APL431LBYI-TR, APL431LBYI-TB, APL431LBYC-TR, APL431LBYC-TB, APL431LBYC-PB Datasheet

APL431L

Low Voltage Adjustable Precision Shunt Regulator

Features General Description

••

•

Precise Reference Voltage to 1.24V

••

••

•

Guaranteed 0.5% or 1% Reference Voltage

••

Tolerance

••

•

Sink Current Capability, 80uA to 100mA

••

••

•

Quick Turn-on

••

••

•

Adjustable Output Voltage, VO = V

••

••

• Low Operational Cathode Current, 80µA

••

to 20V

REF

Typical

••

• 0.1Ω Typical Output Impedance

••

••

• SOT-23-3, SOT-23-5, TO-92 and SOT-89

••

Packages

Applications

••

• Linear Regulators

••

••

• Adjustable Power Supply

••

••

• Switching Power Supply

••

The APL431L is a 3-terminal low voltage adjustable
precision reference with specified thermal stability
over applicable commercial temperature ranges. Out­put voltage may be set to any value between V

(1.

ref

24 V) and 20 V with two external resistors (see Fig­ure 2). When used with an photocoupler, the
APL431L is an ideal voltage reference in isolated feed­back circuits for 3V 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 APL431L ex­cellent replacements for zener diodes in many
applications, including on-board regulation and ad­justable power supplies.

ANODE

3

12

REF

CATHODE

SOT-23-3 (Top View)

CATHODE3

ANODE

2

1

REF

REF

SOT-23-5 (Top View)

123

REF ANODE CATHODE

NC

NC

45

123

ANODE

CATHODE

Symbol

REF

CathodeAnode

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. B.7 - May., 2003

TO-92 (Top View)

Functional Diagram

Cathode

REF

+

_

ref

V

Anode

SOT-89 (Top View)

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APL431L

Ordering and Marking Information

APL431L

APL431L A/B :

APL431L D :

431L

APL431L
XXXXX

XXXXX

Handling Code

Temp. Range

Package Code

Elec. Grade

- Date Code

Elec. Grade
A : 0.5% Reference Voltage Tolerance
B : 1% Reference Voltage Tolerance
Package Code
A : SO T-23-3 B : SO T-23-5
D : SO T-89 E : TO -92
Y:Chip Form
Temp. Range
C : 0 to 70 C I : -40 to 85 C
Handling Code
PB : Plastic Bag TB : Tap e & Box
TR : Ta pe & Re el

APL431L E :

°

APL
431L
XXXXX

°

XXXXX - Date Code

Absolute Maximum Ratings

Symbol Parameter Rating Unit

V

KA

I

K

I

REF

θ

JA

T

J

T

STG

T

SOL

Cathode voltage
Continuous cathode current range
Reference current range

20 V

100 mA

3mA
Thermal Resistance from Junction to Ambient in Free Air
SOT-23-3
SOT-23-5
SOT-89
TO-92

416
357
250
250

Operating Junction Temperature Range -40 to 150
Storage Temperature Range

Lead temperature range, Ts (Soldering, 10sec)

-65 to 150

260

C/W

°

°

°

°

C

C

C

Copyright  ANPEC Electronics Corp.
Rev. B.7 - May., 2003

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APL431L

Electrical Characteristics T

= 25°C ( unless otherwise noted)

A

Symbol Parameter Test Conditions

VKA=V

V

REF

Reference voltage

T

T

A

, IK=10mA

REF

=25°C, (Fig. 1) APL431LB

A

=full range(see

Note1), (Fig.1)

V

DEF

/ ∆V

V

∆

REF

V

Temp Deviation TA =full range (see Note1)

DEF

Ratio of Change in V
to Change in Cathods

KA

, IK=10mA (Fig. 1)

REF

V

KA=VREF

IK=10mA, VKA=16V to V

Votag e

I

REF

I

REF(DEV)

Reference Input Current

I

Tem p D e vi a ti o n

REF

I

=10mA,R1 =10kΩ,R2 =∞ (Fig. 2)

K

=full range (see Note 1),

T

K

=10kΩ, R2=

R

1

,

IK=10mA,

∞

(Fig. 2)

I

K(off)

Z

I

K(MIN)

KA

off-state cathode current V

Dynamic Output
Impedance

Minimum Operating
Current

=0V, (Fig. 3)

REF

V

KA=VREF

, IK=1mA to 100mA,

f ≤1kHz (Fig. 1)

V

KA=VREF

(Fig. 1) 80 100

APL431L

Min. Typ. Max.

APL431LA 1.234 1.240 1.246

1.228 1.240 1.252

APL431LA 1.222 1.240 1.258
APL431LB 1.215 1.240 1.265

515

(Fig. 2) -0.2 -1.0 mV/V

REF

0.15 0.5

0.05 0.3

VK=6V 0.01 0.1

=16V 0.01 0.5

V

K

0.1 0.4

Unit

V

mV

A

µ

A

µ

A

µ

Ω

A

µ

Notes : 1.Full temperature range is 0°C to 70°C for APL431LXXC,and -40°C to 85°C for APL431LXXl.

Copyright  ANPEC Electronics Corp.
Rev. B.7 - May., 2003

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APL431L

Test figures

IN

V

REF

V

o

V

K

I

V

IN

I

K(off)

V

o

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

, VO=VKA=V

REF

I

K

,

REF

REF

V

o

× R

REF

1

Figure 3. Test Circuit for I

K(off)

Copyright  ANPEC Electronics Corp.
Rev. B.7 - May., 2003

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APL431L

Application Schematic

Precision Voltage Reference

IN

V

Precision High-Current Series Regulator

V

IN

B

R

1

R

REF

V

2

R

0.1µ F

o

V

V

o

R

Notes for Application Circuits:

B

0.1µF

R

1

V

REF

R

2

1)To improve the stability of output voltage, a 0.1µF capacitor between cathode and anode of APL431L is
strongly recommended.

2)Set VOUT according to the following equation:
VOUT = VREF(1+R1/R2)+lREF R1

3)Choose the value for RB as follows:
A)The maximum limit for RB should be such that the cathode current(lK) is greater than the minimum op­ erating current (80µA) at VIN(MIN).
B)The minimum limit for RB should be such that the cathode current (lK) does not exceed 100mA under
all load conditions, and the instantaneous turn-on value for lk does not exceed 150mA. Both of the fo­ llowing conditions must. be met:
VIN(MAX)

RB,Min≥

150mA

VIN(MAX)-VOUT

RB,Min≥

lOUT(MIN)+100mA

(to limit instantaneous turn-on lK)

(to limit lK under normal operating conditions)

Copyright  ANPEC Electronics Corp.
Rev. B.7 - May., 2003

www.anpec.com.tw5