AP432/AP432A
Adjustable Precision Shunt Regulator
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/
o
C
- 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\/ (V
REF
) 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
Operating Temp. Range
Blank :
I :
-20
o
C~85
o
C
-40
o
C~85
o
C
Reference Voltage
Package
Lead Free
Packing
Blank : Normal
Blank : SOP-8L
Tolerance:
Blank : Tube or bulk
: SOT89-3L L : Lead Free Package A
Blank : 1.24V(+/-) 1% Y
: Taping
: TO92-3L
A
: 1.24V(+/-) 0.5% V
W
: SOT23-3L
R
: SOT23-3L
Q
: SOT25
Typical Application Circuit
V
IN
V
OUT
+
C
in
AP432
R1
+
C
out
R2
V
OUT
= (1+R1/R2)V
REF
Precision Regulator
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.1.0 May.7, 2004
1/16
AP432/AP432A
Adjustable Precision Shunt Regulator
Block Diagram
REF (R)
+
Cathode (C)
-
V
REF
Symbol
Cathode (C)
1.24V
REF (R)
Anode (A)
Anode (A)
Pin Configuration
Order Number
AP432Y
AP432 AY
AP432IY
AP432IAY
(SOT89)
Pin Configuration (Top View)
3 Cathode
2 Anode
1 REF
Order Number
AP432R
AP432AR
AP432IR
AP432IAR
(SOT23)
Pin Configuration (Top View)
3 Cathode
Anode 1
2 REF
AP432
AP432A
AP432I
AP432IA
(SOP)
Cathode
Anode
Anode
NC
1
2
3
4
Anachip Corp.
www.anachip.com.tw
2/16
+
+
+
AP432V
AP432 AV
AP432IV
AP432IAV
(TO92)
3 Cathode
2 Anode
1 REF
AP432W
AP432AW
AP432IW
AP432IAW
(SOT23)
3 REF
Anode 1
2 Cathode
8
7
6
5
REF
Anode
Anode
NC
AP432 Q
AP432 AQ
AP432IQ
AP432IAQ
(SOT25)
NC
NC
Cathode
1
2
3
5
4
Anode
REF
Rev.1.0 May.7, 2004
AP432/AP432A
Adjustable Precision Shunt Regulator
Marking Information
(1) SOT23 / SOT25 / SOT89
P/N Type
AP432Y
AP432AY
AP432IY
AP432IAY
AP432W
AP432AW
AP432IW
AP432IAW
AP432R
AP432AR
AP432IR
AP432IAR
AP432Q
AP432AQ
AP432IQ
AP432IAQ
(2) SOP
XX
B1
B2
BA
BB
B3
B4
BC
BD
B5
B6
BE
BF
B7
B8
BG
BH
(Top View)
SOT23/SOT25
XX YM X
XX: P/N Type
Date code
Y : Year
M : Month(A~L)
X: Blank : normal
L : Lead Free Package
SOT89
XX
YMX
( Top view )
Logo
Date code
YY : Year
WW: Nth week
AC
AP432X X
YYWW X
Lead Free
Blank: normal
L: Lead Free Package
Temp. grade
Blank: -20
o
C ~ +85
o
C
I
: -40
o
C ~ +85
o
C
Accuracy
Blank:
A
:
1.24
±
1%
1.24
±
0.5%
(3) TO92
( Top view )
Temp. grade
Accuracy
Blank:
1.24
±
1%
A
:
1.24
±
0.5%
Blank: -20
o
C ~ +85
o
C
I
: -40
o
C ~ +85
o
C
AP432X
X YWW X X
Date code
Y : Year
WW: Nth week
Internal code
Lead Free
Blank: normal
L: Lead Free Package
Anachip Corp.
www.anachip.com.tw
3/16
Rev.1.0 May.7, 2004
AP432/AP432A
Adjustable Precision Shunt Regulator
Absolute Maximum Ratings
Cathode Voltage……………....……...........…..........……………………………………...……….20V
Continuous cathode current ………………………………......................……………………...-10mA ~ 250mA
Reference input current range ………………………...….………....................………………………………10mA
Operating temperature range (AP432) ……………………………………………………………… -20
o
C ~ 85
o
C
(AP432I……………..…..…............……………………………..……. -40
o
C~85
o
C
Lead Temperature……………….…………….…..……………………..………………..……........260
o
C
Storage Temperature ……………………..............…......………………….......……...........-65
o
C ~ 150
o
C
Power Dissipation (Notes 1. 2)
SOT89 .……………..……..……………………...........….... 0. 80W
TO92.....…………….………………………....……….. ..... 0.78W
SOT23 …………………..…..…………………………….…. 0.25W
SOT25...……………………..………….……………………..0.25W
SOP...………………….……………………………..……… 0.6W
o
Note 1: TJ, max =150 C. .
Note 2: Ratings apply to ambient temperature at 25
o
C.
Electrical Characteristics
(Ta=25
o
C, unless otherwise specified.)
Test conditions
V
KA
= Vref,
AP432
Reference voltage
I
KA
= 10mA
AP432A
(Fig.1)
Deviation of reference input voltage V
KA
= V
REF
, I
KA
= 10mA ,
over temperature (Note 3)
Ta = full range (Fig.1)
Ratio of the change in reference
I
KA
= 10mA
voltage to the change in cathode
V
KA
= 20 ~V
REF
(Fig.2)
voltage
R1 = 10KΩ,R2 =
∞
Reference input current
I
KA
= 10mA (Fig.2)
R1 = 10KΩ,R2 =
∞
Deviation of reference input current
I
KA
= 10mA
over temperature
Ta = Full range (Fig.2)
Minimum cathode current for
V
KA
= V
REF
(Fig.1)
regulation
Off-state current
V
KA
= 20V , V
REF
= 0V (Fig.3)
V
KA
= V
REF
Dynamic output impedance (Note 4)
∆
I
KA
= 0.1mA ~ 15mA
Frequency
≤
1KHz (Fig.1)
Parameter
Symbol
V
REF
V
REF
∆
V
REF
∆
V
KA
Min.
1.227
1.233
Typ.
1.24
3.0
-1.4
1.4
0.4
0.15
0.1
0.2
Max.
1.252
1.246
20
-2.0
3.5
1.2
0.3
1.0
0.5
Unit
V
mV
mV/V
µA
µA
mA
µA
Ω
I
REF
αI
REF
I
KA(min)
I
KA(off)
Z
KA
Anachip Corp.
www.anachip.com.tw
4/16
Rev.1.0 May.7, 2004
AP432/AP432A
Adjustable Precision Shunt Regulator
V
MAX
V
DEV
= V
MAX
- V
MIN
V
MIN
T
I
TEMPERATURE
T
2
Note 3. Deviation of reference input voltage, V
DEV
, is defined as the maximum variation of the reference over
the full temperature range.
The average temperature coefficient of the reference input voltage
αV
REF
is defined as:
(
V
DEV
V
REF (25
°
C)
)
×
10
6
α
V
REF
=
T
2
−
T
1
……………………..……………….. (
ppm
°
C
)
Where:
T2 – T1 = full temperature change.
αV
REF
can be positive or negative depending on whether the slope is positive or negative.
Note 4. The dynamic output impedance, R
Z
, is defined as:
∆
V
KA
Z
KA
=
∆
I
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:
'
∆
v
Z
KA
=
≈
Z
KA
∆
i
(
1
+
R1
)
R2
Test Circuits
Input
IN
IN
V
KA
I
KA
R1
V
REF
I
REF
V
REF
I
KA
V
KA
V
KA
R2
I
Z(OFF)
V
KA
=
V
REF
(1
+
Fig1. Test Circuit for V
KA
= V
REF
R1
)
+
I
REF
⋅
R1
R2
Fig3. Test Circuit for off-state Current
Fig2. Test circuit for V
KA
＞
V
REF
Anachip Corp.
www.anachip.com.tw
5/16
Rev.1.0 May.7, 2004
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