Page 1
AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Description
The AP432 and AP432A 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 1.24V (V
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/AP432A 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.
) up to 20V merely by
REF
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/°C
• Fast Turn-On Response
• Low Dynamic Output Impedance: 0.2Ω
• Programmable Output Voltage to 20V
• Low Output Noise
• Lead Free packages: SOT25, SC59, SC59R, SOT89-3 and
TO92
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
• SOT23, SOT23R, SOT25, SC59, SC59R, SO-8, SOT89 and
TO92: Available in “Green” Molding Compound (No Br, Sb)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Pin Assignments
(1) SOT25 (2) SO-8
(Top View)
NC
1
NC
2
CATHODE
3
(3) SC59 (4) SC59R
(Top View)
ANODE 1
(5) SOT23 (6) SOT23R
(Top View)
ANODE 1
(7) SOT89-3 (8) TO92
(Top View)
2
1
Anode Cathode
REF
5 ANODE
4REF
3
2 CATHODE
3REF
2CATHOD
3
REF
CATHODE
ANODE
ANODE
ANODE 1
ANODE
NC
(Top View)
(Top View)
1
(Top View)
+
+
+
(Top View)
18
2
3
4
2
3 Cathode
2 Anode
1 REF
Typical Applications Circuit
REF
7
ANODE
ANODE
6
5
NC
3 CATHODE
2REF
CATHODE3
REF
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
+
C
in Cout
AP432
VOUT = (1+R1/R2)VREF
Precision Regulator
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R1
R2
+
OUTVIN
V
September 2012
© Diodes Incorporated
Page 2
Functional Block Diagram
REF (R)
V
AP432/AP432A
+
-
REF
Cathode (C)
Functional Block Diagram
Absolute Maximum Ratings (@T
Symbol Parameter Rating Unit
VCV Cathode Voltage 20 V
ICC Continuous Cathode Current -10 to +250 mA
I
Reference Input Current 10 mA
REF
TOP Operating Temperature -20 to +85 °C
TST Storage Temperature -65 to +150 °C
PD
Notes: 4. TJ, max = +150°C.
5. Ratings apply to ambient temperature at +25°C.
Power Dissipation
(Notes 4, 5)
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
Anode (A)
Cathode (C)
REF (R)
Anode (A)
= +25°C, unless otherwise specified.)
A
SOT23(R) 400 mW
SOT25 550 mW
SC59(R) 400 mW
SO-8 600 mW
SOT89-3 800 mW
TO92-3 780 mW
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Page 3
AP432/AP432A
Electrical Characteristics (@T
Symbol Parameter Test Conditions Min Typ Max Unit
V
Reference voltage
REF
Deviation of reference input voltage over
V
ΔV
ΔV
temperature
REF
(Note 4)
REF
Ratio of the change in reference voltage to
KA
the change in cathode voltage
= +25°C, unless otherwise specified.)
A
V
= V
KA
I
KA
V
KA
,
REF
= 10mA (Figure 1)
= V
, IKA = 10mA,
REF
AP432
AP432A
Ta = Full range (Figure 1)
= 10mA (Figure 2) VKA = 20 ~ V
I
KA
REF
1.227
1.233
1.24
⎯
⎯
-1.4 -2.0 mV/V
1.252
1.246
V
3.0 20 mV
I
Reference input current R1 = 10KΩ,R2 = ∞ IKA= 10mA (Figure 2)
REF
αI
I
KA(MIN)
I
KA(OFF)
|ZKA|
Deviation of reference input current over
REF
temperature
Minimum cathode current for regulation VKA = V
Off-state current VKA = 36V, V
Dynamic output impedance
(Note 5)
R1 = 10KΩ,R2 = ∞ I
T
= Full range (Figure 2)
A
(Figure 1)
REF
REF
V
= V
KA
REF V KA
ΔI
= 0.1mA ~ 15mA
KA
Frequency≤ 1KHz (Figure 1)
= 10mA
KA
= 0V (Figure 3)
= V
REF
⎯
⎯
⎯
⎯
⎯
1.4 3.5 µA
0.4 1.2 µA
0.15 0.3 mA
0.1 1.0 µA
0.2 0.5 Ω
VMAX
V
DEV = VMAX - VMIN
VMIN
Notes: 6. Deviation of reference input voltage, V
The average temperature coefficient of the reference input voltage
TI T2
, is defined as the maximum variation of the reference over the full temperature range.
DEV
Temperature
αV
is defined as:
REF
Vα
REF
V
DEV
(
V
REF
=
−
T
2
6
⋅
10)
°
C)(25
T
……………………..……………….. (
1
ppm
)
C
°
Where:
T2 – T1 = full temperature change.
αV
can be positive or negative depending on whether the slope is positive or negative.
REF
Notes: 7. The dynamic output impedance, R
, is defined as:
Z
V
Δ
KA
Z
=
KA
I
Δ
KA
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:
Δ
v
'
Z +
= ≈
KA
Z
KA
Δ
i
R1
)
(1
R2
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
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Page 4
Test Circuits
AP432/AP432A
Input
V
KA
I
KA
REF
V
Note:VKA=VREF(1+R1/R 2)+IREFxR1
Fig 1. Test Circuit for VKA= V
REF
Fig 2. Test Circuit for V
Typical Performance Characteristics
R1
R2
IREF
REF
V
IN
I
KA
V
KA
IN
V
KA
IZ(OFF)
> V
KA
REF
Fig 3. Test Circuit for Off-State Current
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
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A
A
Typical Performance Characteristics (cont.)
Small-Signal Voltage Amplification vs Frequency
60
IKA=10mA
T
50
40
30
A
=25oC
9μ F
+
-
15KΩ
8.25KΩ
AP432/AP432A
I
KA
Output
232Ω
+
-
20
10
-Small Signal Voltage Amplification (dB)
V
A
0
1K
10K
100K 1M 10M
f-Frequency-Hz
Reference Impedance vs Frequency
100
I
=10mA
KA
o
=25 C
T
A
10
1
Reference Impedance (Ω)
∣
∣ZKA
0.1
1K 10K 100K 1M 10M
f-Frequency-Hz
100
VKA=V
B VKA=5V
C V
=10V
KA
D V
=15V
KA
ref
Stable
-Load Capacitance-µF
C
L
B
C
D
90
80
70
60
50
40
-Cathode Current- mA
30
KA
I
20
10
0
0.001 0.01 0.1 1 10
+The areas under the curves represent conditions that may cause the
de v ice to o s c illa te . F o r c u r v e s B , C, a n d D, R 2 a n d V+ wer e a d ju s ted
STAB ILITY BO UNDA RY CONDITIONS
to es tablis h th e initial V
were then adjusted to determine the ranges of stability.
and IKA con d itions with CL=0.V
KA
†
TA=25oC
Stable
BATT
and CL
Test Circuit for Voltage Amplification
1KΩ
I
50Ω
+
Test Circuit for Reference Impedance
150Ω
I
KA
C
L
Test C ircu it for C urv e A
R1=10KΩ
C
L
R2
Test Circuit for Curve B, C, and D
KA
-
+
-
I
KA
GND
Output
GND
V
BATT
+
-
150Ω
V
BATT
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
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Page 6
Application Examples
V
IN
R1A
R2A
LED on when Low Limit
Low Limit≈ V
High Limit≈ V
(1+R1B/R2B)
REF
(1+R1A/R2A)
REF
Fig. 4 Voltage
Monitor
R1B
R2B
<
V
IN
<
High Limit
V
IN
OFF
Delay =
R
+
ON
RC x ln (
V
Fig. 5 Delay
Timer
AP432/AP432A
I
R
OUT
CL
V
IN
V
IN
)
-V
IN
REF
Fig. 6 Current Limiter or Current
I
OUT
= V
REF
Source
/ R
CL
V
IN
I
= V
REF
/ R
OUT
Fig. 7 Constant-Current
Sink
I
OUT
V
IN
V
OUT
R1
RS
S
R2
V
OUT
= (1 + R1/R2) x V
REF
Fig. 8 Higher-Current Shunt
Regulator
V
IN
PULSE
R1
R2
L
IMIT
Fig. 9 Crow Bar
(1 + R1/R2) x V
V
REF
OUT
VIN
R1A R1B
Output ON when
V
< High Limit
IN
R2A R2B
+
Low Limit <
V
BE
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
Low L
High Limit V
imit V
(1 + R1B/R2B) +V
REF
(1 + R1A/R2A)
REF
BE
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
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Page 7
Ordering Information
AP432/AP432A
AP432 X XX X X
Reference Voltage
Tolerance
Blank : ± 1%
A : ± 0.5%
Package
SA : SOT23
SR : SOT23R
Q : SOT25
W : SC59
R : SC59R
Blank : SO-8
Y : SOT89-3
V : TO92
Part Number
(Note 10)
AP432(A)SAG-7 SA SOT23 3000/Tape & Reel -7 NA NA
Green
AP432(A)SRG-7 SR SOT23R 3000/Tape & Reel -7 NA NA
Green
Pb
Green
Pb
Green
Pb
Green
Green
Pb
Green
Green
Pb
Green
AP432(A)QL-7 Q SOT25 3000/Tape & Reel -7 NA NA
AP432(A)QG-7 Q SOT25 3000/Tape & Reel -7 NA NA
AP432(A)WL-7 W SC59 3000/Tape & Reel -7 NA NA
AP432(A)WG-7 W SC59 3000/Tape & Reel -7 NA NA
AP432(A)RL-7 R SC59R 3000/Tape & Reel -7 NA NA
AP432(A)RG-7 R SC59R 3000/Tape & Reel -7 NA NA
AP432(A)G-13 SO-8 2500/Tape & Reel -13 NA NA
AP432(A)YL-13 Y SOT89-3 2500/Tape & Reel -13 NA NA
AP432(A)YG-13 Y SOT89-3 2500/Tape & Reel -13 NA NA
AP432(A)YG-13R Y SOT89-3 4000/Tape & Reel -13R NA NA
AP432(A)VL-A V TO92 NA NA 2000/Box A
AP432(A)VG-A V TO92 NA NA 2000/Box A
Notes: 8. SO-8, SOT23 and SOT23R are available in “Green” products only.
9. Ammo Box is for TO92 Spread Lead.
10. Suffix “A” denotes AP432A device.
Package
Code
Packaging
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
Leadframe
L : Lead Free
G : Green (Note 8)
Packing
7 : Tape & Reel
13 : Tape & Reel
13R : Tape & Reel
A : Ammo Box (Note 9)
7”/13 Tape and Reel Ammo Box
Quantity Part Number Suffix Quantity
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Part Number
Suffix
September 2012
© Diodes Incorporated
Page 8
Marking Information
(1) SC59 and SC59R
AP432/AP432A
( Top View )
(2) SOT23 and SOT23R
(3) SOT25
(4) SO-8
XX
( Top View )
( Top View )
5
XX
1 2 3
3
Y W
1 2
3
Y W
XX
1 2
W
Y
XX : Identification code
X
W
XX : Identification code
X
W
7
4
XX
X
( Top View )
Y
: Year 0~9
: Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
: A~Z : Green
X
a~z : Lead Free
: Year 0~9
Y
: Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X
: A~Z : Green
: Identification code
: Year 0~9
Y
: Week : A~Z : 1~26 week;
W
a~z : 27~52 week; z represents
52 and 53 week
X
: A~Z : Green
a~z : Lead Free
Logo
Part Number
Accuracy
Blank : 2.495 +
A : 2.495 +
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
1%
0.5%
8
AP432X
YY
WW X
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5
G : Green
YY
: Year : 08, 09,10~
: Week : 01~52; 52
X
41
WW
represents 52 and 53 week
: Internal Code
X
September 2012
© Diodes Incorporated
Page 9
Marking Information (cont.)
(5) SOT89-3
( Top View )
XX : Identification code
X X
Y W
1 32
(6) TO92
( Top View )
Accuracy
Blank: 2.495 + 1%
A: 2.495 + 0.5%
Device Package (Note 11) Identification Code
AP432SA SOT23 D3 YM
AP432ASA SOT23 D4 YM
AP432SR SOT23R D7 YM
AP432ASR SOT23R D8 YM
AP432Q SOT25 B7 YM
AP432AQ SOT25 B8 YM
AP432W SC59 B3 YM
AP432AW SC59 B4 YM
AP432R SC59R B5 YM
AP432AR SC59R B6 YM
AP432Y SOT89 B1 YM
AP432AY SOT89 B2 YM
Notes: 11. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Y : Year : 0~9
W
X
: Week : A~Z : 1~26 week;
X
: Internal code
AP432
Y WW X X
X
a~z : 27~52 week;
z represents 52 and 53 week
A~Z : Green
a~z : Lead Free
G : Green
L : Lead Free
: Year : 0~9
Y
WW : Week : 01~52; 52
represents 52 and 53 week
X
: Internal Code
AP432/AP432A
Date Code
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
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Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.
(1) SOT25
A
Dim Min Max Typ
B C
H
K
J
D
N
L
M
M 0.10 0.20 0.15
All Dimensions in mm
(2) SC59 and SC59R
A
Dim Min Max Typ
C
B
K
J
G
H
N
D
L
M
All Dimensions in mm
(3) SOT23 and SOT23R
A
Dim Min Max Typ
C
B
H
K
F
J
D
G
K1
L
M
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
10 of 15
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SOT25
A 0.35 0.50 0.38
B 1.50 1.70 1.60
C 2.70 3.00 2.80
D
⎯ ⎯
H 2.90 3.10 3.00
J 0.013 0.10 0.05
K 1.00 1.30 1.10
L 0.35 0.55 0.40
N 0.70 0.80 0.75
0° 8°
α
SC59
A 0.35 0.50 0.38
B
1.50 1.70 1.60
C
2.70 3.00 2.80
D
- - 0.95
G
- - 1.90
H
2.90 3.10 3.00
J
0.013 0.10 0.05
K
1.00 1.30 1.10
L
0.35 0.55 0.40
M
0.10 0.20 0.15
N 0.70 0.80 0.75
0° 8° -
α
SOT23
A 0.37 0.51 0.40
B 1.20 1.40 1.30
C 2.30 2.50 2.40
D 0.89 1.03 0.915
F 0.45 0.60 0.535
G 1.78 2.05 1.83
H 2.80 3.00 2.90
J 0.013 0.10 0.05
K 0.903 1.10 1.00
K1 - - 0.400
L 0.45 0.61 0.55
M 0.085 0.18 0.11
0° 8° -
α
All Dimensions in mm
0.95
⎯
AP432/AP432A
September 2012
© Diodes Incorporated
Page 11
Package Outline Dimensions (cont.) (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.
(4) SO-8
e
D
E1
E
A1
Detail ‘A’
h
°
45
A2
A3
A
b
L
0.254
Gaug e Plane
Seating Plane
7°~9
°
Detail ‘A’
(5) SOT89-3
D1
R
E
1
H
B1
B
e
8° (4X)
D
0
0
2
.
0
L
A
C
H
AP432/AP432A
Dim Min Max
All Dimensions in mm
SO-8
A - 1.75
A1 0.10 0.20
A2 1.30 1.50
A3 0.15 0.25
b 0.3 0.5
D 4.85 4.95
E 5.90 6.10
E1 3.85 3.95
e 1.27 Typ
h - 0.35
L 0.62 0.82
0° 8°
θ
All Dimensions in mm
SOT89
Dim Min Max
A 1.40 1.60
B 0.44 0.62
B1 0.35 0.54
C 0.35 0.44
D 4.40 4.60
D1 1.62 1.83
E 2.29 2.60
e 1.50 Typ
H 3.94 4.25
H1 2.63 2.93
L 0.89 1.20
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
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Package Outline Dimensions (cont.) (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.
(6) TO92
E
B
EJECTION
MARK
A
EJECTION
E
MARK
L2
L3
b
L
L1
LOOSE PRODUCT
e
e
D
N
c
e2 e2
TAPED PRODUCT
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
www.diodes.com
12 of 15
AP432/AP432A
Dim Min Max Typ
A 3.45 3.66 -
B 4.27 4.78 -
b - - 0.38
c - - 0.38
D - - 3.87
E 4.32 4.83 -
e - - 1.27
e2 2.40 2.90 -
L 12.98 15.00 -
L1 12.80 15.00 -
L2 0.80 - -
L3 2.00 3.00 -
N 1.22 1.37 -
All Dimensions in mm
TO92
September 2012
© Diodes Incorporated
Page 13
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
(1) SOT25
C2C2
Dimensions Value (in mm)
G
Z
C1
Y
X
(2) SC59 and SC59R
Y
Z
C
X E
(3) SOT23 and SOT23R
(4) SO-8
Y
Z
X
X
C2
Y
E
C
C1
Dimensions Value (in mm)
Dimensions Value (in mm)
AP432/AP432A
Z
G
X
Y
C1 2.40
C2
Dimensions Value (in mm)
Z 3.4
X 0.8
Y 1.0
C
E
Z 2.9
X 0.8
Y 0.9
C
E
X 0.60
Y 1.55
C1 5.4
C2 1.27
3.20
1.60
0.55
0.80
0.95
2.4
1.35
2.0
1.35
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
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Suggested Pad Layout (cont.)
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
(5) SOT89-3
X1
Y3
Y
(6) TO92 for Ammo Pack
X2 (2x)
Y1
Y4
Y2
C
X (3x)
AP432/AP432A
Dimensions Value (in mm)
X 0.900
X1 1.733
X2 0.416
Y 1.300
Y1 4.600
Y2 1.475
Y3 0.950
Y4 1.125
C 1.500
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
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© Diodes Incorporated
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AP432/AP432A
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintende d or unauthorized applic ation, Customers shall indemnif y and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names a nd markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properl y used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning the i r prod ucts and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2012, Diodes Incorporated
www.diodes.com
IMPORTANT NOTICE
LIFE SUPPORT
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
15 of 15
www.diodes.com
September 2012
© Diodes Incorporated
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