Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
APL1431L
www.anpec.com.tw
1
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
Precise Reference Voltage to 1.24V
Guaranteed 0.5% or 1% Reference Voltage
Tolerance
Sink Current Capability , 60mA to 100mA
Quick Turn-on
Adjustable Output Voltage , V
O
= V
REF
to 20V
Low Operational Cathode Current , 60mA
Typical
0.1
Typical Output Impedance
SOT-23-5 Packages
Applications
Linear Regulators
Adjustable Power Supply
Switching Power Supply
Symbol
The APL1431L is a 3-terminal low voltage adjust-
able precision reference with specified thermal sta-
bility over applicable commercial temperature ranges
. Output voltage may be set to any value between
V
REF
(1.24 V) and 20 V with two external resistors
(see Figure 2) . When used with an photocoupler ,
the APL1431L is an ideal voltage reference in iso-
lated feedback circuits for 1.24V to 12V switching-
mode power supplies . This device has a typical
output impedance of 0.1
.
Active output circuitry
provides a very sharp turn-on characteristic ,
mak-
ing the APL1431L excellent replacements for zener
diodes in many applications , including on-board
regulation and adjustable power supplies .
Features
General Description
Functional Diagram
Cathode
Anode
R E F
N C
N C
AN O D E
R E F
C A T H O D E
1
2
3
4
5
+
-
C athode
A node
R E F
V
R E F
Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
APL1431L
www.anpec.com.tw
2
Absolute Maximum Ratings
Electrical Characteristics
T
A
= 25
C ( unless otherwise noted)
Ordering and Marking Information
APL1431L
Elec. Grade
Handling Code
Temp. Range
Package Code
Elec. Grade
A : 0.5% Reference Voltage Tolerance
B : 1% Reference Voltage Tolerance
Package Code
B : SOT- 23 - 5
Temp. Range
C : 0 to 70 C
I : -40 to 85 C
Handling Code
PB : Plastic Bag TB : Tape & Box
TR : Tape & Reel
Lead Free Code
L : Lead Free Device Blank : Original Device
APL1431L B :
1431L
Lead Free Code
Symbol
Parameter
Rating
Unit
V
KA
Cathode Voltage
20
V
I
K
Continuous Cathode Current
100
mA
I
REF
Reference Current
3
mA
JA
Thermal Resistance from Junction to Ambient in Free Air
SOT-23-5
357
C/W
T
J
Operating Junction Temperature Range
-40 to 150
C
T
STG
Storage Temperature Range
-65 to 150
C
T
SOL
Lead Temperature Range, T
s
(Soldering, 10sec)
260
C
APL1431L
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
APL1431LA 1.234
1.240
1.246
V
KA
=V
REF
, I
K
=10mA
T
A
= 25
C, (Fig. 1)
APL1431LB 1.228
1.240
1.252
APL1431LA 1.222
1.240
1.258
V
REF
Reference Voltage
T
A
= full range
(see Note 1), (Fig. 1)
APL1431LB 1.215
1.240
1.265
V
V
DEV
V
DEF
Temp Deviation
T
A
= full range(see Note 1),
V
KA
=V
REF
, I
K
=10mA, (Fig. 1)
5
15
mV
V
REF
/
V
KA
Ratio of Change in V
REF
to Change in Cathode
Voltage
I
K
=10mA,
V
KA
=16V to V
REF
(Fig. 2)
-0.2
-1.0
mV/V
I
REF
Reference Input Current I
K
=10mA, R
1
=10k
, R
2
=
(Fig. 2)
0.15
0.5
A
Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
APL1431L
www.anpec.com.tw
3
Test Circuits
Figure 1. Test Circuit for V
KA
=V
REF
, V
O
=V
KA
=V
REF
Figure 2. Test Circuit for V
KA
>V
REF
,
V
O
= V
KA
= V
REF
(1+R
1
/R
2
) + I
REF
R
1
Figure 3. Test Circuit for I
K(OFF)
Electrical Characteristics
T
A
= 25
C ( unless otherwise noted)
Note : 1. Full temperature range is 0
C to 70
C for APL1431LXXC, and 40
C to 85
C for APL1431LXXI
.
APL1431L
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
REF(DEV)
I
REF
Temp Deviation
T
A
= full range(see Note 1), R
1
=10k
,
R
2
=
, I
K
=10mA, (Fig. 2)
0.05
0.3
A
V
K
=6V
0.01
0.1
I
K(off)
Off-state cathode current V
REF
=0V, (Fig. 3)
V
K
=16V
0.01
0.5
A
Z
KA
Dynamic Output
Impedance
V
KA
=V
REF
, I
K
=100
A to 100mA ,
f<1kHz , (Fig. 1 )
0.1
0.3
I
K(MIN)
Minimum Operating
Current
V
KA
=V
REF
, (Fig. 1)
60
80
A
V
R E F
V
O
V
IN
I
K
V
R E F
V
O
V
IN
I
K
I
R E F
R
1
R
2
V
O
I
K ( O F F )
V
IN
Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
APL1431L
www.anpec.com.tw
4
Notes for Application Circuits:
1) To improve the stability of output voltage , a 0.1
F capacitor between cathode and anode of APL431L
is strongly recommended.
2) Set V
O
according to the following equation:
V
O
= V
REF
(1+R1/ R2)+ I
REF
R1
3) Choose the value for R
B
as follows:
The maximum limit for R
B
should be such that the cathode current( I
K
) is greater than the minimum
operating current (60
A) at V
IN (MIN)
.
The minimum limit for R
B
should be such that the cathode current (I
K
) does not exceed 100mA under
all load conditions, and the instantaneous turn-on value for I
K
does not exceed 150mA . Both of the
following conditions must be met :
R
B,MIN
V
IN(MAX)
/ 150mA ( to limit instantaneous turn-on I
K
)
R
B,MIN
V
IN(MAX)
- V
O
/ I
O (MIN)
+ 100mA (to limit I
K
under normal operating conditions)
Application Schematic
Precision Voltage Reference
Precision Voltage Regulator
V
O
V
IN
A P L 4 3 1 L
R
B
R
1
R
2
G N D
V
R E F
0 . 1
F
V
O
V
IN
A P L 4 3 1 L
R
B
R
1
R
2
V
R E F
0.1
F
Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
APL1431L
www.anpec.com.tw
5
Typical Characteristics
-1
-0.5
0
0.5
1
1.5
- 3 0 0
- 2 0 0
- 1 0 0
0
1 0 0
2 0 0
3 0 0
- 1 5 0
- 1 0 0
- 5 0
0
5 0
1 0 0
1 5 0
- 1 . 5
- 1
- 0 . 5
0
0 . 5
1
1 . 5
-40
-20
0
2 0
4 0
6 0
8 0
1 0 0
1 . 2 3 4
1 . 2 3 6
1 . 2 3 8
1.24
1 . 2 4 2
1 . 2 4 4
1 . 2 4 6
1 . 2 4 8
Reference Voltage (V)
Reference Input Current (nA)
Junction Temperature (
C)
Junction Temperature (
C)
Cathode Voltage (V)
Cathode Current (mA)
Cathode Voltage (V)
Cathode Current (
A)
5 0
7 5
1 0 0
1 2 5
1 5 0
- 4 0
- 2 0
0
2 0
4 0
6 0
8 0
1 0 0
T
A
=25
C
V
KA
=V
REF
T
A
=25
C
V
KA
=V
REF
I
K
=10mA
I
K
=10mA
R1=10k
R2=
Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
APL1431L
www.anpec.com.tw
6
Typical Characteristics (Cont.)
Junction Temperature (
C)
Ratio of Delta Reference Voltage to Delta
Cathode Voltage (-mV/V)
Junction Temperature (
C)
Off State Cathode Current (nA)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
-40
-20
0
2 0
4 0
6 0
8 0
1 0 0
I
K
=10mA
V
KA
=
16V to V
REF
0
5 0
1 0 0
1 5 0
2 0 0
2 5 0
- 4 0
- 2 0
0
2 0
4 0
6 0
8 0
1 0 0
V
REF
=0V
V
KA
=16V
Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
APL1431L
www.anpec.com.tw
7
Packaging Information
SOT-23-5
e 1
E 1
E
b
1
2
3
4
5
e
D
A 2
A
A 1
L 2
L
L 1
a
M i l l i me t e r s I n c h es
D i m
M i n . M a x . M i n . M a x .
A 0 . 9 5 1 . 4 5 0 . 0 3 7 0 . 0 5 7
A 1 0 . 0 5 0 . 1 5 0 . 0 0 2 0 . 0 0 6
A 2 0 . 9 0 1 . 3 0 0 . 0 3 5 0 . 0 5 1
b 0 . 3 0 0 . 5 0 0 . 0 11 0 . 0 1 9
D 2 . 8 3 . 0 0
0 . 11 0 0 . 11 8
E 2 . 6 3 . 0 0
0 . 1 0 2 0 . 11 8
E 1 1 . 5 1 . 7 0 0 . 0 5 9 0 . 0 6 7
e 0 . 9 5 BS C
0 . 0 3 7B S C
e 1 1 . 9 0 BS C
0 . 0 7 4 B S C
L 0 . 3 5 0 . 5 5 0 . 0 1 4 0 . 0 2 2
L 1
0 . 2 0 BSC
0 . 0 0 8 B S C
L 2 0 . 5 0 . 7 0 . 0 2 0 0 . 0 2 8
N 5
5
0
1 0
0
1 0
Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
APL1431L
www.anpec.com.tw
8
Physical Specifications
t 25 C to P e ak
tp
R am p-u p
t
L
R am p-d ow n
ts
P rehea t
T sm ax
T sm in
T
L
T
P
25
Tem
p
er
at
ur
e
T im e
C ritical Z one
T
L
to T
P
Reflow Condition
(IR/Convection or VPR Reflow)
Classificatin Reflow Profiles
Sn-Pb Eutectic Assembly
Pb-Free Assembly
Profile Feature
Large Body
Small Body
Large Body
Small Body
Average ramp-up rate
(T
L
to T
P
)
3
C/second max.
3
C/second max.
Preheat
-
Temperature Min (Tsmin)
-
Temperature Mix (Tsmax)
-
Time (min to max)(ts)
100
C
150
C
60-120 seconds
150
C
200
C
60-180 seconds
Tsmax to T
L
- Ramp-up Rate
3
C/second max
Tsmax to T
L
-
Temperature(T
L
)
-
Time (t
L
)
183
C
60-150 seconds
217
C
60-150 seconds
Peak Temperature(Tp)
225 +0/-5
C 240
+0/-5
C 245
+0/-5
C 250
+0/-5
C
Time within 5
C of actual Peak
Temperature(tp)
10-30 seconds
10-30 seconds
10-30 seconds 20-40 seconds
Ramp-down Rate
6
C/second max.
6
C/second max.
Time 25
C to Peak Temperature
6 minutes max.
8 minutes max.
Note: All temperatures refer to topside of the package. Measured on the body surface.
Terminal Material
Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb), 100%Sn
Lead Solderability
Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3.
Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
APL1431L
www.anpec.com.tw
9
t
Ao
E
W
Po
P
Ko
Bo
D 1
D
F
P1
Carrier Tape & Reel Dimensions
A
J
B
T2
T1
C
Reliability Test Program
Test item
Method
Description
SOLDERABILITY MIL-STD-883D-2003
245
C, 5 SEC
HOLT MIL-STD-883D-1005.7
1000 Hrs Bias @125
C
PCT JESD-22-B,A102
168 Hrs, 100
%
RH, 121
C
TST MIL-STD-883D-1011.9
-65
C~150
C, 200 Cycles
ESD
MIL-STD-883D-3015.7
VHBM > 2KV, VMM > 200V
Latch-Up
JESD 78
10ms, 1
tr
> 100mA
Application
A
B
C
J
T1
T2
W
P
E
178
1
72
1.0
13.0 + 0.2 2.5
0.15
8.4
2
1.5
0.3
8.0
0.3
4
0.1
1.75
0.1
F
D
D1
Po
P1
Ao
Bo
Ko
t
SOT-23-5
3.5
0.05
1.5
0.1
1.5
0.1
4.0
0.1
2.0
0.1
3.15
0.1
3.2
0.1
1.4
0.1
0.2
0.033
(mm)
Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
APL1431L
www.anpec.com.tw
10
Application
Carrier Width
Cover Tape Width
Devices Per Reel
SOT- 23-5
8
5.3
3000
Cover Tape Dimensions
Anpec Electronics Corp.
Head Office :
5F, No. 2 Li-Hsin Road, SBIP,
Hsin-Chu, Taiwan, R.O.C.
Tel : 886-3-5642000
Fax : 886-3-5642050
Taipei Branch :
7F, No. 137, Lane 235, Pac Chiao Rd.,
Hsin Tien City, Taipei Hsien, Taiwan, R. O. C.
Tel : 886-2-89191368
Fax : 886-2-89191369
Customer Service
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