Power AP432G-A Adjustable precision shunt regulator Datasheet

Advanced Power
Electronics Corp.
AP432
Adjustable Precision Shunt Regulator
„ Features
„ General Description
- Precision reference voltage
B : 1.24V ± 1%
A : 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
- RoHS Compliant & Halogen Free Product
The AP432 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 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
Package
M
G
T
N
Y
: SOP-8
: SOT89
: TO92
: SOT23
: SOT25
Reference Voltage
Tolerance:
A
: 1.24V(+/-) 0.5%
B
: 1.24V(+/-)1%
„ Typical Application Circuit
VIN
VOUT
+
R1
Cin
+
Cout
AP432
R2
VOUT = (1+R1/R2)VREF
Precision Regulator
This datasheet contains new product information. Advanced Power Electronics 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.
1
20130108V3.1
Advanced Power
Electronics Corp.
AP432
Adjustable Precision Shunt Regulator
„ Block Diagram
„ Symbol
Cathode (C)
REF (R)
+
VREF
Cathode (C)
-
1.24V
REF (R)
Anode (A)
Anode (A)
„ Pin Configuration
Order Number
Pin Configuration (Top View)
Order Number
Pin Configuration (Top View)
3 Cathode
AP432 G
AP432N
(SOT-23)
2 Anode
(SOT-89)
3 Cathode
Anode 1
2 REF
1 REF
AP432 T
3
Cathode
(TO-92)
2
Anode
1
REF
AP432M
(SOP-8)
(SOT-25)
Cathode
1
8
REF
Anode
2
7
Anode
Anode
3
6
Anode
NC
4
5
NC
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www.a-power.com.tw
NC
1
NC
12
Cathode
3
AP432Y
5
Anode
4
REF
2
Advanced Power
Electronics Corp.
AP432
Adjustable Precision Shunt Regulator
„ Absolute Maximum Ratings
Cathode Voltage…………....……..............................…..........……………………………………...……….20V
Continuous cathode current ………………………………......................……………………...-10mA ~ 250mA
Reference input current range ……………………...….………....................………………………………10mA
Operating temperature range ............……………………………………………………………… -40 oC ~ 85oC
Lead Temperature……………….…………….…..……………………..………………..……........260 o C
Storage Temperature ……………………..............…......………………….......……...........-65oC ~ 150oC
Power Dissipation (Notes 1. 2)
SOT-89 .……………..……..……………………...........….... 0. 80W
TO-92.....…………….………………………....……….. ..... 0.78W
SOT-23 …………………..…..…………………………….…. 0.25W
SOT-25...……………………..………….……………………..0.25W
SOP-8...………………….……………………………..……… 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
Symbo
l
VKA = Vref,
-B
VREF
I KA = 10mA
-A
(Fig.1)
Deviation of Reference Input Voltage VKA = VREF , IKA = 10mA ,
VREF
over Temperature (Note 3)
Ta = full range
(Fig.1)
Ratio of the Change in Reference
∆VREF
IKA = 10mA
VKA = 20 ~VREF ∆V
Voltage to the Change in Cathode
(Fig.2)
KA
Voltage
R1 = 10KΩ,R2 = ∞
IREF
Reference Input Current
IKA= 10mA (Fig.2)
R1 = 10KΩ,R2 = ∞
Deviation of Reference Input Current
αIREF
IKA = 10mA
over Temperature
Ta = Full range (Fig.2)
Minimum Cathode Current for
VKA = VREF (Fig.1)
IKA(min)
Regulation
Off-state Current
VKA = 20V , VREF = 0V (Fig.3) IKA(off)
V = VREF
Dynamic Output Impedance (Note 4) KA
Z KA
Frequency ≤ 1KHz (Fig.1)
Reference Voltage
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Min.
1.227
1.233
Typ.
1.24
Max.
1.252
1.246
Unit
V
3.0
20
mV
-1.4
-2.0
mV/V
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
3
Advanced Power
Electronics Corp.
AP432
Adjustable Precision Shunt Regulator
VMAX
VDEV = VMAX - VMIN
VMIN
TI
T2
TEMPERATURE
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:
(
αVREF =
VDEV
VREF (25°C)
) × 10
6
……………………..……………….. ( ppm
T2 − T1
°C
)
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:
∆ 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
ZKA =
≈ ZKA
∆i
(1 +
R1
)
R2
„ Test Circuits
Input
IN
VKA
IKA
IKA
VKA
R1
VREF
R2
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VKA
IREF
VREF
V KA = V REF (1 +
Fig1. Test Circuit for V KA= VREF
IN
IZ(OFF)
R1
) + IREF ⋅ R1
R2
Fig2. Test circuit for V KA>VREF
Fig3. Test Circuit for off-state Current
4
Advanced Power
Electronics Corp.
AP432
Adjustable Precision Shunt Regulator
„ Typical Performance Characteristics
SMALL-SIGNAL VOLTAGE AMPLIFICATION vs. FREQUENCY
IKA=10mA
TA=25oC
50
Output
IKA
15KΩ
40
+
9µF
30
232Ω
+
-
AV -Small Signal Voltage Amplification (dB)
60
-
8.25KΩ
GND
20
TEST CIRCUIT FOR VOLTAGE AMPLIFICATION
10
0
10K
1K
100K
1M
f-Frequency-Hz
10M
REFERENCE IMPEDANCE vs. FREQUENCY
∣ZKA∣—Reference Impedance —Ω
100
IKA=10mA
TA=25oC
1KΩ
Output
I KA
10
50Ω
+
GND
1
TEST CIRCUIT FOR REFERENCE IMPEDANCE
0.1
1K
10K
100K
1M
10M
f-Frequency-Hz
STABILITY BOUNDARY CONDITIONS †
100
90
IKA-Cathode Current-m A
80
150O
TA=25 oC
A VKA=Vref
I KA
B VKA=5V
C VKA=10V
D VKA=15V
B
Stable
70
60
50
CL
+
-
VBATT
C
Stable
A
TEST CIRCUIT FOR CURVE A
40
30
D
I KA
20
10
CL
0
0.001
150O
R1=10KO
R2
0.01
0.1
1
C L-Load Capacitance-µF
10
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 CL =0.V BATT and
CL were then adjusted to determine the ranges of stability.
+
-
VBATT
TEST CIRCUIT FOR CURVE B, C, AND D
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Advanced Power
Electronics Corp.
AP432
Adjustable Precision Shunt Regulator
„ Application Examples
VIN
V IN
RCL
R
R1A
VIN
R1B
ON
R2A
R2B
+
OFF
LED on when Low Limit<VIN<High Limit
Low Limit ≈ VREF (1+R1B/R2B)
High Limit ≈ VREF (1+R1A/R2A)
V IN
Delay = RC x ln(
)
VIN -VREF
Fig.5 Delay Timer
Fig.4 Voltage Monitor
VIN
IOUT
IOUT
VIN
IOUT = VREF / RCL
Fig.6 Current Limiter or Current Source
VOUT
VIN
R1
R1
R2
R2
RS
LIMIT
VOUT = (1 + R1/R2) ×V REF
IOUT = VREF / RS
Fig.7 Constant-Current Sink
VOUT
PUSE
Fig.8 Higher-Current Shunt Regulator
(1 + R1/R2) ×V REF
Fig.9 Crow Bar
VIN
R1A
R1B
+
R2A
Low Limit
High Limit
R2B
Output ON when
Low Limint <VIN<High Limit
VBE
VREF(1 + R1B/R2B) +VBE
VREF(1 + R1A/R2A)
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
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Advanced Power
Electronics Corp.
AP432
MARKING INFORMATION
SO-8
Part Number
Package Code
432M
YWWSSS
Date Code (YWWSSS)
Y:Last Digit Of The Year
WW:Week
SSS:Sequence
SOT-23-5L
Part Number : R2
R2SS
Date Code
SS:2004,2008,2012…
SS:2003,2007,2011…
SS:2002,2006,2010…
SS:2001,2005,2009…
SOT-23
Part Number : R2
R2SS
Date Code
SS:2004,2008,2012…
SS:2003,2007,2011…
SS:2002,2006,2010…
SS:2001,2005,2009…
SOT-89
Part Number
Package Code
432G
YWWS
Date Code (YWWS)
Y:Year
WW:Week
S:Sequence
7
Advanced Power
Electronics Corp.
AP432
MARKING INFORMATION
TO-92
Part Number
Package Code
432T
YWWS
Date Code (YWWS)
Y:Year
WW:Week
S:Sequence
8
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