apl1087a.1

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

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.

Adjustable Precision Shunt Regulator

Features

General Description

Applications

The APL431 is a 3-terminal adjustable voltage refer-

ence with specified thermal stability over applicable

commercial temperature ranges. Output voltage may

be set to any value between V

ref

(2.5 V) and 20 V with

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 0.1

Ω. Active output cir-

cuitry provides a very sharp turn-on characteristic,

making the APL431 excellent replacements for ze-

ner diodes in many applications, including on-board

regulation and adjustable power supplies.

•••••

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, V

= V

ref

to 20V

•••••

Low Operational Cathode Current, 250µA

Typical

•••••

0.1

Ω Typical Output Impedance

•••••

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

and TO-92S Packages

•••••

Linear Regulators

•••••

Adjustable Power Supply

•••••

Switching Power Supply

Cathode

Anode

REF

Symbol

Functional Diagram

ref

Cathode

REF

Anode

SOT-23 (Top View)

REF

ANODE

CATHODE

SOT-89 (Top View)

REF

ANODE CATHODE

REF

ANODE

CATHODE

TO-92 (Top View)

SO-8 (Top View)

REF

ANODE

CATHODE

ANODE

REF ANO DE

CATHO DE

SOT-23-5 (Top View)

REF

ANODE

CATHODE

TO-92S (Top View)

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

Symbol

Parameter

Rating

Unit

Cathode voltage

Continuous cathode current range

100

REF

Reference current range

Thermal Resistance from Junction to Ambient in Free Air

SOT-23

SOT-23-5

SOT-89

TO-92

SO-8

416

357

250

210

°C/W

Ambient temperature range APL431XXC

APL431XXI

0 to 70

-40 to 85

°C

Junction temperature range APL431XXC

APL431XXI

0 to 150

-40 to 150

°C

STG

Storage Temperature Range

-65 to 150

°C

Lead temperature range, T

(Soldering, 10sec)

Original Device

260

SOL

Lead Free Device

300

°C

Ordering and Marking Information

A P L 4 3 1

E le c . G ra d e

H a n d lin g C o d e

T e m p . R a n g e

P a c k a g e C o d e

E le c . G ra d e

A : 0 .5 % R e fe re n c e V o lta g e T o le ra n c e

B : 1 % R e fe re n c e V o lta g e T o le ra n c e

C : 2 % R e fe re n c e V o lta g e T o le ra n c e

P a c k a g e C o d e

A : S O T -2 3 B : S O T -2 3 -5 D : S O T -8 9

E : T O -9 2 I : T O -9 2 S K : S O -8

Y : C h ip F o rm

T e m p . R a n g e

C : 0 to 7 0 C

I : -4 0 to 8 5 C

H a n d lin g C o d e

P B : P la s tic B a g T B : T a p e & B o x

T R : T a p e & R e e l

L e a d F r e e C o d e

L : L e a d F r e e D e v ic e

B la n k : O r g in a l D e v ic e

A P L

4 3 1

X X X X X

X X X X X - D a te C o d e

A P L 4 3 1 E /I :

A P L 4 3 1 D /K :

A P L 4 3 1

X X X X X

- D a te C o d e

X X X X X

A P L 4 3 1 A /B :

4 3 1

L e a d F r e e C o d e

Absolute Maximum Ratings

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

Electrical Characteristics (Cont.)

= 25°C ( unless otherwise noted)

APL431

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

APL431A

2.487

2.500

2.513

APL431B

2.475

2.500

2.525

REF

Reference voltage

REF

=10mA*

APL431C

2.450

2.500

2.550

∆V

REF

/ T

Reference voltage

drift over temp. range

REF

=10mA

=0 to 70°C*

=-40 to 85°C*

=10mA, V

REF

to 10V

-1.5

-3

∆V

REF

∆V

Voltage ratio (open

loop gain)

=10mA, V

REF

to 20V

-1.2

-2.5

mV/V

REF

Reference current

=10mA,

=10kΩ, R

=open

1.0

µA

∆I

REF

Reference current

drift

=10mA, R

=10k

Ω,

=open, T

= -40 to 85

°C

0.3

µA

K(min)

Min. cathode current V

REF

0.25

0.5

K(off)

Off-state cathode

current

= 20V, V

REF

= 0V

0.1

µA

Dynamic impedance

REF

=1mA to 100mA, f

≤1kHz

0.1

0.4

Ω

Cathode current

REF

+ 50mV

100

Notes :

*1 : use Figure 1

*2 : use Figure 2

*3 : use Figure 3

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

Test figures

Figure 1. Test Circuit for V

REF

, V

REF

Figure 2. Test Circuit for V

REF

= V

REF

× (1+R

) + I

REF

× R

Figure 3. Test Circuit for I

K(off)

Application schematic

∗

should provide cathode current large than

1mA to maintain APL431 work properly.

REF

K(off)

REF

27.5k

Ω

0.1%

27.5k

Ω

0.1%

5-Volt Precision Regulator

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

2.47

2.475

2.48

2.485

2.49

2.495

2.5

2.505

2.51

2.515

2.52

-20

100

-40

-200

200

400

600

800

-1

-2 00

2 0 0

4 0 0

6 0 0

8 0 0

-1

Typical Characteristics

Cathode Current (

Cathode Current vs. Cathode Voltage

Cathode Voltage (V)

Temperature (°C)

Reference Voltage vs. Temperature

Reference V

oltage (V)

Temperature (°C)

Reference Input Current (

Reference Input Current vs. Temperature

Cathode Current vs. Cathode Voltage

Cathode Voltage (V)

Cathode Current (mA)

K-MIN

0.5

1.5

-40

-20

100

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

1 0

2 0

3 0

4 0

5 0

6 0

1 0

1 0 0

1 0 0 0

1 0

1 1

1 2 1 3

-4 0

-2 0

2 0

4 0

6 0

8 0

1 0 0

0 .1

0 .2

0 .3

0 .4

0 .5

-40

-20

2 0

4 0

6 0

8 0

1 0 0 1 2 0

-2

-1.7 5

-1.5

-1.2 5

-1

-0.7 5

-0.5

-0.2 5

Typical Characteristics (Cont.)

Pulse Response

Time (

µS)

Temperature (°C)

Ratio of Delta Reference Voltage to

Delta Cathode Voltage vs. Tmperature

Ratio of Delta Reference V

oltage to

Delta Cathode V

oltage (mV/V)

Frequency (kHz)

Small-Signal V

oltage Amplification (dB)

Small-Signal Voltage Amplification vs.

Frequency

Off-State Cathode Current vs. Temperature

Temperature (°C)

Off-State Cathode Current (

Input and Output V

oltage (V)

Input

Output

=20V

REF

to 20V

=10mA

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

200k

10k

20k

50k 100k

100m

200m

300m

500m

-5 00

50 0

10 00

15 00

20 00

25 00

-5

100

0.001

0.01

0.1

Typical Characteristics (Cont.)

Reference Impedance (

Ω

)

Reference Impedance vs. Frequency

Frequency (Hz)

Cathode Voltage (V)

Off State Cathode Current (

Off State Cathode Current vs.

Cathode Voltage

Stability Boundary Conditions

Load Capacitance (

µF)

Cathode Current (mA)

REF

=100mA

=25°C

REF

=3.3V

Stable

=25°C

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

Packaging Information

SOT-23

M illimet ers

Inches

Dim

M in.

M ax.

M in.

M ax.

1.00

1.30

0.039

0.051

0.00

0.10

0.000

0.004

0.35

0.51

0.014

0.020

0.10

0.25

0.004

0.010

2.70

3.10

0.106

0.122

1.40

1.80

0.055

0.071

1.90 BSC

0.075 BSC

2.40

3.00

0.094

0.118

0.37

0.0015

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

Packaging Information

SOT-23-5

L 2

L 1

Millimet ers

Inches

Dim

Min .

Max.

Min .

Max.

0.95

1.45

0.037

0.057

0.05

0.15

0.002

0.006

0.90

1.30

0.035

0.051

2.8

3.00

0.110

0.118

2.6

3.00

0.102

0.118

1.5

1.70

0.059

0.067

0.35

0.55

0.014

0.022

0.20 BSC

0.008 BSC

0.5

0.7

0.020

0.028

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

Packaging Information

SOT-89

M illim eters

Inches

Dim

M in.

M ax.

M in.

M ax.

1.40

1.60

0.055

0.063

0.40

0.56

0.016

0.022

0.35

0.48

0.014

0.019

0.35

0.44

0.014

0.017

4.40

4.60

0.173

0.181

1.35

1.83

0.053

0.072

1.50 BSC

0.059 BSC

3.00 BSC

0.118 BSC

2.29

2.60

0.090

0.102

3.75

4.25

0.148

0.167

0.80

1.20

0.031

0.047

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

Packaging Information

SEATING PLANE

TO-92

M i l l i m e t e r s

I n c h e s

D i m

M i n .

M a x .

M i n .

M a x .

4 . 3 1 8

5 . 3 3 4

0 . 1 7 0

0 . 2 1 0

φ b

0 . 4 0 6

0 . 5 5 9

0 . 0 1 6

0 . 0 2 2

φ b 2

0 . 4 0 6

0 . 5 5 9

0 . 0 1 6

0 . 0 2 2

φ D

4 . 4 4 5

5 . 2 0 7

0 . 1 7 5

0 . 2 0 5

3 . 1 7 5

4 . 1 9 1

0 . 1 2 5

0 . 1 6 5

2 . 4 1 3

2 . 6 6 7

0 . 0 9 5

0 . 1 0 5

e 1

1 . 1 4 3

1 . 3 9 7

0 . 0 4 5

0 . 0 5 5

3 . 4 2 9

0 . 1 3 5

1 2 . 7 0

0 . 5 0 0

L 1

1 . 2 7

0 . 0 5 0

2 . 9 2 1

0 . 1 1 5

2 . 0 3 2

2 . 6 6 7

0 . 0 8 0

0 . 1 0 5

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

Packaging Information

SO-8

Millimet ers

Inches

Dim

Min.

Max.

Min.

Max.

1.35

1.75

0.053

0.069

0.10

0.25

0.004

0.010

4.80

5.00

0.189

0.197

3.80

4.00

0.150

0.157

5.80

6.20

0.228

0.244

0.40

1.27

0.016

0.050

0.33

0.51

0.013

0.020

1.27BSC

0.50BSC

φ 1

0.015X45

0.004max.

Rev. C.1 - Jun., 2003

APL431

www.anpec.com.tw

Physical Specifications

Reference JEDEC Standard J-STD-020A APRIL 1999

Reflow Condition

(IR/Convection or VPR Reflow)

Pre-heat temperature

183 C

Peak temperature

Time

temperature

Classification Reflow Profiles

Convection or IR/

Convection

VPR

Average ramp-up rate(183

°C to Peak)

°C/second max.

°C /second max.

Preheat temperature 125 ± 25

°C)

120 seconds max

Temperature maintained above 183

°C

60 – 150 seconds

Time within 5

°C of actual peak temperature 10 –20 seconds

60 seconds

Peak temperature range

220 +5/-0

°C or 235 +5/-0°C 215-219°C or 235 +5/-0°C

Ramp-down rate

°C /second max.

Time 25

°C to peak temperature

6 minutes max.

Package Reflow Conditions

pkg. thickness

≥≥≥≥ 2.5mm

and all bgas

pkg. thickness < 2.5mm and

pkg. volume

≥≥≥≥ 350 mm³

pkg. thickness < 2.5mm and pkg.

volume < 350mm³

Convection 220 +5/-0

°C

Convection 235 +5/-0

°C

VPR 215-219

°C

VPR 235 +5/-0

°C

IR/Convection 220 +5/-0

°C

IR/Convection 235 +5/-0

°C

Terminal Material

Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb)