apl1087a.1

Rev. B.7 - May., 2003

APL431L

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.

Low Voltage Adjustable Precision Shunt Regulator

Features

General Description

Applications

The APL431L is a 3-terminal low voltage adjustable

precision reference with specified thermal stability

over applicable commercial temperature ranges. Out-

put voltage may be set to any value between V

ref

(1.

24 V) and 20 V with two external resistors (see Fig-

ure 2). When used with an photocoupler, the

APL431L is an ideal voltage reference in isolated feed-

back circuits for 3V to 12V switching-mode power

supplies. This device has a typical output imped-

ance of 0.1

Ω. Active output circuitry provides a very

sharp turn-on characteristic,

making the APL431L ex-

cellent replacements for zener diodes in many

applications, including on-board regulation and ad-

justable power supplies.

•••••

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, V

= V

REF

to 20V

•••••

Low Operational Cathode Current, 80µA

Typical

•••••

0.1

Ω Typical Output Impedance

•••••

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

Packages

•••••

Linear Regulators

•••••

Adjustable Power Supply

•••••

Switching Power Supply

Symbol

Functional Diagram

ref

Cathode

REF

Anode

SOT-23-3 (Top View)

REF

ANODE

CATHODE

SOT-89 (Top View)

REF

ANODE CATHODE

REF

ANODE

CATHO DE

TO-92 (Top View)

Cathode

Anode

REF

CATHO DE

ANO DE

SOT-23-5 (Top View)

Rev. B.7 - May., 2003

APL431L

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-23-3

SOT-23-5

SOT-89

TO-92

416

357

250

°C/W

Operating Junction Temperature Range

-40 to 150

°C

STG

Storage Temperature Range

-65 to 150

°C

SOL

Lead temperature range, T

(Soldering, 10sec)

260

°C

Ordering and Marking Information

A P L431L

E lec. G rade

H andling C ode

T e m p . R a nge

P a ckage C ode

E lec. G rade

A : 0 .5% R efe re nce V olta ge T olerance

B : 1 % R eference V o ltage T olerance

P a ckage C ode

A : S O T -23-3 B : S O T -2 3-5

D : S O T -89 E : T O -9 2

Y :C hip F orm

T e m p . R a nge

C : 0 to 70 C

I : -40 to 85 C

H andling C ode

P B : P lastic B a g T B : T ap e & B ox

T R : T ap e & R eel

A P L

431 L

X X X X X

X X X X X - D ate C od e

A P L43 1L E :

A P L43 1L D :

A P L43 1L

X X X X X

- D ate C od e

X X X X X

A P L43 1L A /B :

431 L

Absolute Maximum Ratings

Rev. B.7 - May., 2003

APL431L

www.anpec.com.tw

Electrical Characteristics

= 25°C ( unless otherwise noted)

APL431L

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

APL431LA 1.234 1.240 1.246

REF

, I

=10mA

=25

°C, (Fig. 1)

APL431LB 1.228 1.240 1.252

APL431LA 1.222 1.240 1.258

REF

Reference voltage

=full range(see

Note1), (Fig.1)

APL431LB 1.215 1.240 1.265

DEF

Temp Deviation

=full range (see Note1)

REF

, I

=10mA (Fig. 1)

∆V

REF

∆V

Ratio of Change in V

REF

to Change in Cathods

Votage

=10mA, V

=16V to V

REF

(Fig. 2)

-0.2

-1.0

mV/V

REF

Reference Input Current I

=10mA,R

=10k

Ω,R

∞ (Fig. 2)

0.15

0.5

µA

REF(DEV)

REF

Temp Deviation

=full range (see Note 1),

=10k

Ω, R

∞, I

=10mA,

(Fig. 2)

0.05

0.3

µA

=6V

0.01

0.1

K(off)

off-state cathode current V

REF

=0V, (Fig. 3)

=16V

0.01

0.5

µA

Dynamic Output

Impedance

REF

, I

=1mA to 100mA,

≤1kHz (Fig. 1)

0.1

0.4

Ω

K(MIN)

Minimum Operating

Current

REF

(Fig. 1)

100

µA

Notes : 1.Full temperature range is 0

°C to 70°C for APL431LXXC,and -40°C to 85°C for APL431LXXl.

Rev. B.7 - May., 2003

APL431L

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)

REF

K(off)

REF

Rev. B.7 - May., 2003

APL431L

www.anpec.com.tw

Application Schematic

1)To improve the stability of output voltage, a 0.1

µF capacitor between cathode and anode of APL431L is

strongly recommended.

2)Set V

OUT

according to the following equation:

OUT

= V

REF

(1+R1/R2)+l

REF

3)Choose the value for R

as follows:

A)The maximum limit for R

should be such that the cathode current(l

) is greater than the minimum op-

erating current (80

µA) at V

IN(MIN)

B)The minimum limit for RB should be such that the cathode current (l

) 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:

IN(MAX)

150mA

IN(MAX)

-V

OUT

OUT(MIN)

+100mA

0.1

RE F

Precision Voltage Reference

0.1

REF

Precision High-Current Series Regulator

Notes for Application Circuits:

(to limit instantaneous turn-on l

)

B,Min

≥

(to limit l

under normal operating conditions)

B,Min

≥

Rev. B.7 - May., 2003

APL431L

www.anpec.com.tw

-100

-50

100

-1.5

-1

-0.5

0.5

1.5

0.08

0.10

0.12

0.14

0.16

0.18

-50

-25

100

125

150

1.22

1.23

1.24

1.25

1.26

-50

-25

100

125

150

-250

-200

-150

-100

-50

100

150

200

250

-1

-0.5

0.5

1.5

Typical Characteristics

REF

=10mA

Cathode Voltage (V)

Cathode Current (mA)

Cathode Voltage (V)

Cathode Current (

Cathode Current vs. Cathode Voltage

Junction Temperature (

°C)

Reference Voltage (V)

Reference Input Current (

Junction Temperature (

°C)

Referemce Voltage vs.

Junction Temperature

Reference Input Current vs.

Junction Temperature

=25°C

REF

=25°C

=10k

Ω, R

∞

=10mA

Rev. B.7 - May., 2003

APL431L

www.anpec.com.tw

0.1

0.2

0.3

0.4

0.5

-50

-25

100

125

150

0 S

5 S

0 S

5 S

-1

-0.9

-0.8

-0.7

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

-50

-25

100

125

150

Typical Characteristics

Input

Junction Temperature (

°C)

Ratio of Delta Reference Voltage to

Delta Cathode Voltage (-mV/V)

Junction Temperature (

°C)

Off State Cathode Current (

Off State Cathode Current vs.

Junction Temperature

∆V

REF

∆V

vs. Junction Temperature

REF

=0V

=16V

=6V

=1mA

Output

Input

Output

=25°C

=0.1mA

=25°C

∆

REF

to 20V

=10mA

Rev. B.7 - May., 2003

APL431L

www.anpec.com.tw

100

0.0001

0.001

0.01

0.1

-10

100

1000

10000

100000 1000000

100

150

200

250

300

350

0.01

0.1

100

1000

10000

100000 1000000

Typical Characteristics

Frequency (Hz)

Zka (

Ω

)

Frequency (Hz)

Gain (dB)

Phase Shift (degree)

Gain vs. Phase Shift vs. Frequency

Zka vs. Frequency

Load Capacitance (

µF)

Ik (mA)

Stability Boundary Conditions

REF

=2.5V

=3.3V

Stable

Unstable

REF

=10mA

=25°C

=10mA

=25°C

Rev. B.7 - May., 2003

APL431L

www.anpec.com.tw

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

SOT-23

Package Information

Rev. B.7 - May., 2003

APL431L

www.anpec.com.tw

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

Package Information

Rev. B.7 - May., 2003

APL431L

www.anpec.com.tw

Package 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. B.7 - May., 2003

APL431L

www.anpec.com.tw

SOT-89 (Reference EIAJ ED-7500A Reg stration SC-62)

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

Package Information

Rev. B.7 - May., 2003

APL431L

www.anpec.com.tw

Reference JEDEC Standard J-STD-020A APRIL 1999

Reflow Condition

(IR/Convection or VPR Reflow)

Physical Specifications

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)

Lead Solderability

Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3.