Adjustable Precision Shunt Regulator
AP432/AP432A
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.A3 Feb.12, 2004
1/15
Features
- Precision reference voltage
AP432 : 1.24V ± 1%
AP432A : 1.24V ± 0.5%
- Sink current capability: 200mA.
- Minimum cathode current for regulation: 150µA
- Equivalent full-range temp coefficient: 30 ppm/oC
- Fast turn-on Response.
- Low dynamic output impedance: 0.2Ω
- Programmable output voltage to 20v
- Low output noise
- Packages: SOT89, SOT23, SOT25, SOP8 and
TO92
General Description
The AP432/432A are 3-terminal adjustable
precision shunt regulators with guaranteed stable
temperature over the applicable extended
commercial temperature range. The output voltage
may be set at any level greater than 1.24\/ (VREF) up
to 20V merely by selecting two external resistors
that act as a voltage divider network. These devices
have a typical output impedance of 0.2Ω. Active
output circuitry provides very sharp turn-on
characteristics, making these devices excellent
improved replacements for Zener diodes in many
applications.
The precise +/- 1% reference voltage tolerance of
the AP432/432A make it possible in many
applications to avoid the use of a variable resistor,
consequently saving cost and eliminating drift and
reliability problems associated with it.
Ordering Information
A P 4 3 2 X X X X X
Package Packing
Blank : Tube or bulk
A : Taping
Reference Voltage
Operating Temp. Range
Blank : SOP-8L
Y : SOT89-3L
V : TO92-3L
W : SOT23-3L
R : SOT23-3L
Q : SOT25
Blank : -20
o
C~85
o
C
I : -40
o
C~85
o
C
Lead Free
Blank : Normal
L : Lead Free Package
Tolerance:
Blank : 1.24V(+/-) 1%
A : 1.24V(+/-) 0.5%
Typical Application Circuit
+
+
R2
R1
V
OUT
V
IN
V
OUT
= (1+R1/R2)V
REF
Precision Regulator
C
in
C
out
AP432
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
2/15
Block Diagram
REF (R)
V
REF
+
-
Anode (A)
Cathode (C)
1.24V
Symbol
Cathode (C)
REF (R)
Anode (A)
Pin Configuration
Order Number Pin Configuration (Top View)
AP432Y
AP432 AY
AP432IY
AP432IAY
(SOT89)
AP432V
AP432 AV
AP432IV
AP432IAV
(TO92)
Order Number
AP432R
AP432AR
AP432IR
AP432IAR
(SOT23)
AP432W
AP432AW
AP432IW
AP432IAW
(SOT23)
1 REF
2 Anode
3 Cathode
1 REF
2 Anode
+
+
+
3 Cathode
Anode 1
2 Cathode
3 REF
Anode 1
2 REF
3 Cathode
Cathode 1
Anode 2
Anode 3
NC 4 5 NC
6 Anode
7 Anode
8 REF
AP432
AP432A
AP432I
AP432IA
(SOP)
Pin Configuration (Top View)
AP432 Q
AP432 AQ
AP432IQ
AP432IAQ
(SOT25)
NC 1
4 REF
NC 2
Cathode 3
5 Anode
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
3/15
Marking Information
(1) SOT23 / SOT25 / SOT89
P/N Type X X
AP432Y B1
AP432AY B2
AP432IY BA
AP432IAY BB
AP432W B3
AP432AW B4
AP432IW BC
AP432IAW BD
AP432R B5
AP432AR B6
AP432IR BE
AP432IAR BF
AP432Q B7
AP432AQ B8
AP432IQ BG
AP432IAQ BH
XX YM X
SOT23/SOT25
XX
YMX
SOT89
Date code
Y :Year
M : Month(A~L)
XX: P/N Type
(Top View)
X: Blank : normal
L : Lead Free Package
(2) SOP
Accuracy
AC
AP432X X
YYWW X
Blank:
A :
Logo
( Top view )
1%1.24 ±
0.5%1.24 ±
Blank: -20oC ~ +85oC
I : -40oC ~ +85oC
YY : Year
WW: Nth week
Date code
Temp. grade
Lead Free
Blank: normal
L: Lead Free Package
(3) TO92
Accuracy
AP432X
X YWW X X
Blank:
A :
( Top view )
Y : Year
WW: Nth week
Date code Internal code
Temp. grade
1%1.24 ±
0.5%1.24 ±
Blank: -20
o
C ~ +85
o
C
I : -40
o
C ~ +85
o
C
Blank: normal
L: Lead Free Package
Lead Free
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
4/15
Absolute Maximum Ratings
Cathode
voltage ……………………………....……...........…..........……………………………………...……….20V
Continuous cathode current …………………………………......................…………………….... -10mA ~
250mA
Reference input current range ………………………...….………....................……………………….….......
10mA
Operating temperature range (AP432) ………………………………………………………………… -20oC ~
85oC
(AP432I).……………..…..…............……………………………..……. -40oC~85oC
Lead Temperature……………….…………….…..……………………..………………..…….........…............
260oC
Storage Temperature ……………………………..............…......………………….......……............ -65oC ~
150oC
Power Dissipation (Notes 1. 2) SOT89 .……………..……..……………………............….... 0.
80W
TO92 .....…………….………………………....……….. ..... 0.78W
SOT23. …………………..…..…………………………….…. 0.23W
SOT25. ..……………………..………….……………………..0.23W
SOP …………………….……………………………..……… 0.6W
Note 1: TJ, max =150oC. .
Note 2: Ratings apply to ambient temperature at 25oC.
Electrical Characteristics (Ta=25oC, unless otherwise specified.)
Parameter Test conditions Symbol Min. Typ. Max. Unit
AP432 1.227 1.252
Reference voltage
VKA = Vref,
I KA = 10mA
(Fig.1) AP432A VREF 1.233 1.24 1.246 V
Deviation of reference input voltage
over temperature (Note 3)
VKA = VREF , IKA = 10mA ,
Ta = full range (Fig.1) VREF 3.0 20 mV
Ratio of the change in reference
voltage to the change in cathode
voltage
IKA = 10mA
(Fig.2) VKA = 20 ~VREF
KA
REF
V
V
∆
∆
-1.4 -2.0 mV/V
Reference input current R1 = 10KΩ,R2 = ∞
IKA= 10mA (Fig.2) IREF 1.4 3.5 µA
Deviation of reference input current
over temperature
R1 = 10KΩ,R2 = ∞
IKA = 10mA
Ta = Full range (Fig.2)
αIREF 0.4 1.2 µA
Minimum cathode current for
regulation VKA = VREF (Fig.1) IKA(min) 0.15 0.3 mA
Off-state current VKA = 20V , VREF = 0V (Fig.3) IKA(off) 0.1 1.0 µA
Dynamic output impedance (Note 4)
V KA = VREF
∆IKA = 0.1mA ~ 15mA
Frequency ≤ 1KHz (Fig.1)
KA
Z 0.2 0.5 Ω
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
5/15
V
MAX
V
MIN
T
I
T
2
TEMPERATURE
V
DEV
= V
MAX
- V
MIN
Note 3. Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference over
the full temperature range.
The average temperature coefficient of the reference input voltage αVREF is defined as:
12
6
C)(25
REF
DEV
REF TT
10)
V
V
(
V
−
×
°
=
α
……………………..……………….. ( )
C
ppm
°
Where:
T2 – T1 = full temperature change.
αVREF can be positive or negative depending on whether the slope is positive or negative.
Note 4. The dynamic output impedance, RZ, is defined as:
KA
KA
KA I
V
Z∆
∆
=
When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output
impedance of the overall circuit, is defined as:
)(
≈
R2
R1
1Z
i
v
'
ZKAKA +
∆
∆
=
Test Circuits
Input
V
REF
V
KA
I
KA
Fig1. Test Circuit for V
KA
= V
REF
IN
V
REF
R1
R2
I
REF
I
KA
V
KA
Fig2. Test circuit for V
KA
＞
V
REF
IN
V
KA
I
Z(OFF)
Fig3. Test Circuit for off-state Current
R1I)
R2
R1
(1VV REFREFKA ⋅++=
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
6/15
Typical Performance Characteristics
+
-
+
-
Output
GND
15K
Ω
8.25K
Ω
9
μ
F
I
KA
232
Ω
TEST CIRCUIT FOR VOLTAGE AMPLIFICATION
SMALL-SIGNAL VOLTAGE AMPLIFICATION vs. FREQUENCY
0
10
20
30
40
50
60
1K 10K 100K 1M 10M
f-Frequency-Hz
AV-Small Signal Voltage Amplification (dB)
I
KA
=10mA
T
A
=25
o
C
+
-
IKA
GND
Output
1K
Ω
50
Ω
TEST CIRCUIT FOR REFERENCE IMPEDANCE
REFERENCE IMPEDANCE vs. FREQUENCY
0.1
1
10
100
1K 10K 100K 1M 10M
f-Frequency-Hz
∣ZKA∣—Reference Impedance —Ω
I
KA
=10mA
T
A
=25
o
C
+
-
150O
IKA
V
BATT
C
L
TEST CIRCUIT FOR CURVE A
+
-
C
L
R1=10KO
R2
IKA
150O
V
BATT
TEST CIRCUIT FOR CURVE B, C, AND D
The areas under the curves represent conditions that may cause the
device to oscillate. For curves B, C, and D, R2 and V+ were adjusted
to establish the initial V
KA
and I
KA
conditions with C
L
=0.V
BATT
and
C
L
were then adjusted to determine the ranges of stability.
STABILITY BOUNDARY CONDITIONS†
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10
CL-Load Capacitance-µF
IKA-Cathode Current-m
A
A VKA=Vref
B VKA=5V
C V
KA=10V
D V
KA=15V
A
B
C
D
Stable
Stable
TA=25oC
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
7/15
Application Examples
V
IN
+
Low Limit V
REF
(1 + R1B/R2B) +V
BE
High Limit V
REF
(1 + R1A/R2A)
R1A R1B
R2A R2B V
BE
Output ON when
Low Limint
＜
V
IN
＜
High Limit
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
V
IN
R
CL
I
OUT
I
OUT
= V
REF
/ R
CL
Fig.6 Current Limiter or Current Source
I
OUT
V
IN
I
OUT
= V
REF
/ R
S
R
S
Fig.7 Constant-Current Sink
Fig.4 Voltage Monitor Fig.5 Delay Timer
V
OUT
= (1 + R1/R2)
×
V
REF
V
IN
R1
R2
Fig.8 Higher-Current Shunt Regulator
V
OUT
V
IN
PUSE
R1
R2
L
IMIT
(1 + R1/R2)
×
V
REF
Fig.9 Crow Bar
V
OUT
V
IN
ON
OFF
R
+
V
IN
Delay = RC x ln( V
IN
-V
REF
)
LED on when Low Limit
＜
V
IN
＜
High Limit
Low Limit
≈
V
REF
(1+R1B/R2B)
High Limit
≈
V
REF
(1+R1A/R2A)
R1A
R2A
V
IN
R1B
R2B
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
8/15
Package Diagrams
(1) SOT89-3L Package Outline Dimension
c
5
0
(2x)
L
HE
E
D1
e1
e
A
D
b1
bb
8
0
(2x)
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 1.40 1.50 1.60 0.055 0.059 0.063
b 0.36 0.42 0.48 0.014 0.016 0.018
b1 0.41 0.47 0.53 0.016 0.043 0.051
C 0.35 0.39 0.43 0.014 0.015 0.017
D 4.40 4.50 4.60 0.173 0.177 0.181
D1 1.40 1.60 1.75 0.055 0.062 0.069
e 2.90 3.00 3.10 0.114 0.118 0.122
e1 1.45 1.50 1.55 0.057 0.059 0.061
E 2.40 2.50 2.60 0.094 0.098 0.102
HE 3.94 - 4.25 0.155 - 0.167
L 0.80 - 1.20 0.031 - 0.047
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
9/15
(2) TO92-3L Package Outline Dimension
Db
b
1
b
EL
e
A
1
A
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 3.302 3.556 3.810 0.130 0.140 0.150
A1 1.016 - - 0.040 - -
b 0.330 0.381 0.432 0.013 0.015 0.017
b1 0.406 0.457 0.506 0.016 0.018 0.020
D 4.445 4.572 4.699 0.175 0.180 0.185
E 4.445 4.572 4.699 0.175 0.180 0.185
L 13.00 - 15.500 0.512 - 0.610
e 1.150 1.270 1.390 0.045 0.050 0.055
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
10/15
(3) SOT23-5L Package Outline Dimension
θ
Gauge Plane
0.25 mm
L
L1
E1 E
e1
D
123
4
5
b
e
b1
b
CC1
Base
Metal
With
Plating
A2
A1
A
Seating Plane
0.10 C
5x
2(4x)
θ
1(4x)
θ
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 1.05 1.20 1.35 0.041 0.047 0.053
A1 0.05 0.10 0.15 0.002 0.004 0.006
A2 1.00 1.10 1.20 0.039 0.043 0.047
b 0.25 - 0.55 0.010 - 0.022
b1 0.25 0.40 0.45 0.010 0.016 0.018
c 0.08 - 0.20 0.003 - 0.008
c1 0.08 0.11 0.15 0.003 0.004 0.006
D 2.70 2.85 3.00 0.106 0.112 0.118
E 2.60 2.80 3.00 0.102 0.110 0.118
E1 1.50 1.60 1.70 0.059 0.063 0.067
L 0.35 0.45 0.55 0.014 0.018 0.022
L1 0.60 Ref. 0.024 Ref.
e 0.95 Bsc. 0.037 Bsc.
e1 1.90 Bsc. 0.075 Bsc.
θ 0o 5
o 10o 0
o 5
o 10o
θ1 3o 5
o 7
o 3
o 5
o 7
o
θ2 6o 8
o 10o 6
o 8
o 10o
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
11/15
(4) SOT23-3L Package Outline Dimension
C
L
e
E
HE
2
13
D
A2
A1
b
A
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 1.00 1.20 1.40 0.039 0.047 0.055
A1 0.00 - 0.10 0.000 - 0.004
A2 1.00 1.15 1.30 0.039 0.045 0.051
b 0.35 - 0.50 0.014 - 0.020
C 0.10 0.175 0.25 0.004 0.007 0.010
D 2.70 2.90 3.10 0.106 0.114 0.122
E 1.40 1.60 1.80 0.055 0.063 0.071
e 1.70 2.00 2.30 0.067 0.079 0.091
HE 2.40 2.70 3.00 0.094 0.106 0.118
L 0.35 0.45 0.55 0.014 0.018 0.022
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
12/15
(5) SOP-8L Package Outline Dimension
VIEW "A"
L
C
VIEW "A"
H
E
A
A2
A1
B
e
D
7(4X) 0.015x45 7(4X)
y
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 1.40 1.60 1.75 0.055 0.063 0.069
A1 0.10 - 0.25 0.040 - 0.100
A2 1.30 1.45 1.50 0.051 0.057 0.059
B 0.33 0.41 0.51 0.013 0.016 0.020
C 0.19 0.20 0.25 0.0075 0.008 0.010
D 4.80 5.05 5.30 0.189 0.199 0.209
E 3.70 3.90 4.10 0.146 0.154 0.161
e - 1.27 - - 0.050 -
H 5.79 5.99 6.20 0.228 0.236 0.244
L 0.38 0.71 1.27 0.015 0.028 0.050
y - - 0.10 - - 0.004
θ 0O - 8O 0
O - 8O
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
13/15
Taping Information
(1)TO92 TAPING
Po
M
Ho
T
F2 F1
Do
A
Δ
h
Millimeters Inches
Symbol Min. Typ. Max. Min. Typ. Max.
Po 12.4 12.7 13.0 0.488 0.500 0.512
M 2.0 2.5 3.0 0.079 0.098 0.118
Ho 15.5 16.0 16.5 0.610 0.630 0.650
Do - 4.0 - - 0.157 -
A - 6.0 - - 0.236 -
Δh 0.0 - 1.0 0.000 - 0.039
T - 18.0 - - 0.709 -
F1 2.4 2.5 2.9 0.094 0.098 0.114
F2 2.4 2.5 2.9 0.094 0.098 0.114
30
±
1mm
90
±
1mm
76
±
1mm
360
±
2mm
45mm
53
±
2mm
E
330mm
40mm
205mm
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
14/15
(2) TO92 TAPING
H2A H2A
D1
F1
F2
P1
P
P2
D
LL1
A
D2
H1
H4
H3
H
W1
W
H2 H2
T2
T
T1
Millimeters Inches
Symbol Min. Typ. Max. Min. Typ. Max.
A 3.18 7.59 12 0.125 0.299 0.472
D 3.8 4 4.2 0.150 0.157 0.165
D1 0.36 0.445 0.53 0.014 0.018 0.021
D2 - - 9.0 - - 0.354
F1,F2 2.4 2.5 2.7 0.094 0.098 0.106
F1-F2 - 0.30 - - ±0.012 -
H 15.5 16 16.5 0.610 0.630 0.650
H1 8.5 9 9.5 0.335 0.354 0.374
H2 - - 0.5 - - 0.020
H2A - - 0.5 - - 0.020
H3 - - 27 - - 1.063
H4 - - 20 - - 0.787
L - - 11 - - 0.433
L1 2.5 - - 0.098 - -
P 12.5 12.7 12.9 0.492 0.500 0.508
P1 5.95 6.35 6.75 0.234 0.250 0.266
P2 50.3 50.8 51.3 1.980 2.000 2.020
T - - 0.55 - - 0.022
T1 - - 1.42 - - 0.056
T2 0.36 0.52 0.68 0.014 0.020 0.027
W 17.5 18.25 19 0.689 0.719 0.748
W1 5 6 7 0.197 0.236 0.276
----* 253 254 255 9.961 10.000 10.039
----* = every 20 pcs distance.
Adjustable Precision Shunt Regulator
AP432/AP432A
Anachip Corp.
www.anachip.com.tw Rev.A3 Feb.12, 2004
15/15
BOX Dimension
53
195 4040
70
19540
197 40.540.5
41 330
24
556
811.5
330
37.5
6
43
4.68
18.18 16.67
18.68
38.5
39.5
unit:mm.
