Diodes AP431SA Adjustable precision shunt regulator Datasheet

AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
General Description
Features
•
•
•
•
•
•
•
•
•
•
•
The AP431 and AP431A are 3-terminal adjustable precision
shunt regulators with guaranteed temperature stability over the
applicable extended commercial temperature range. The output
voltage may be set at any level greater than 2.495V (VREF) up to
36V 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.
Precision reference voltage
AP431 : 2.495V ± 1%
AP431A : 2.495V ± 0.5%
Sink current capability: 200mA
Minimum cathode current for regulation: 300µA
o
Equivalent full-range temp coefficient: 30 ppm/ C
Fast turn-on response
Low dynamic output impedance: 0.2Ω
Programmable output voltage to 36V
Low output noise
Packages: SOT23, SOT23R, SOT25, SC59 (W package
code), SC59 (R package code), SOP-8L and TO92-3L
SOT23, SOT23R, SOP-8L and SC59: Available in
“Green” Molding Compound (No Br, Sb) (Note 1)
Lead Free Finish/RoHS Compliant for Lead Free and
“Green” Products (Note 2)
The precise (+/-) 1% Reference voltage tolerance of the
AP431/AP431A 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 1 X X X X
Reference Voltage
Tolerance:
Blank : +/- 1%
A
: +/- 0.5%
Note:
SOP-8L
TO92-3L
SOT23
SC59
SC59
SOT25
SOT23R
L : Lead Free
G : Green (Note 1)
-B : Bulk
-7/-13 : Taping
-A : Ammo Box (Note 3)
7” Tape and Reel
13” Tape and Reel
Ammo Box
Package Packaging
Part Number
Part Number
Part Number
Code
(Note 5) Quantity
Quantity
Quantity
Suffix
Suffix
Suffix
AP431(A)SA
SA
SOT23
AP431(A)SR
SR
SOT23R
AP431(A)Q
Q
SOT25
AP431(A)W
W
SC59
AP431(A)R
R
SC59
AP431(A)
Lead-free
Blank :
V
:
SA :
W
:
R
:
:
Q
SR :
Packing
Lead-Free
1. SOT23, SOT23R are “Green” products only.
2. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
(Note 4)
Lead-free
Package
AP431(A)V
Notes:
V
3000/Tape
& Reel
3000/Tape
& Reel
3000/Tape
& Reel
3000/Tape
& Reel
3000/Tape
& Reel
-7
NA
NA
NA
NA
-7
NA
NA
NA
NA
-7
NA
NA
NA
NA
-7
NA
NA
NA
NA
NA
NA
NA
NA
-13
NA
NA
NA
2000/Box
-A
-7
SOP-8L
NA
NA
TO92-3L
NA
NA
2500/Tape
& Reel
NA
3. Ammo Box is for TO92-3 Spread Lead.
4. Suffix “A” denotes AP431A device.
5. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP431/AP431A Rev. 5
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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Pin Assignment
Pin Configuration (Top View)
Package
NC
SOT25
NC
5
SOP-8L
2
3
1
SOT23
2
TO92-3L
AP431/AP431A Rev. 5
8
REF
ANODE
2
7
ANODE
ANODE
3
6
ANODE
NC
4
5
NC
3
CATHODE
2
REF
1
3 Cathode
2 Anode
1 REF
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SOT23R
3
REF
2
CATHODE
3
CATHODE
2
REF
ANODE 1
CATHODE
+
ANODE
1
REF
+
SC-59
( Package
Code-R)
REF
3
ANODE
ANODE
+
SC-59
( Package
Code-W)
Pin Configuration (Top View)
CATHODE
1
4
CATHODE
Package
ANODE 1
MARCH 2007
© Diodes Incorporated
AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Application Circuit
VIN
VOUT
+
R1
Cin
+
Cout
AP431
R2
VOUT = (1+R1/R2)VREF
Precision Regulator
Block Diagram
REF (R)
+
Cathode (C)
VREF
Anode (A)
Symbol
Cathode (C)
REF (R)
Anode (A)
AP431/AP431A Rev. 5
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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Absolute Maximum Ratings
Symbol
Vcv
ICC
IREF
TOP
TST
PD
Parameter
Cathode Voltage
Continuous Cathode Current
Reference Input Current
Operating Temperature
Storage Temperature
SOT23(R)
SOT25
Power Dissipation
SC59
(Notes 6, 7)
SOP-8L
TO92-3L
Rating
Unit
+36
-10 to +250
10
-20 to +85
-65 to +150
250
250
400
600
780
V
mA
mA
o
C
o
C
mW
mW
mW
mW
mW
Note: 6. TJ, max =150°C
7. Ratings apply to ambient temperature at 25°C
AP431/AP431A Rev. 5
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© Diodes Incorporated
AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Electrical Characteristics
( TA = 25oC, V+ = +5.0V, unless otherwise stated )
PARAMETER
TEST CONDITIONS
AP431
VKA = VREF,
AP431A
I KA = 10mA (Fig.1)
VKA = VREF, IKA = 10mA,
Ta = Full range (Fig.1)
VKA = 10V ~VREF
IKA = 10mA (Fig. 2)
VKA= 36V ~10V
R1 = 10KΩ,R2 = ∞ IKA= 10mA (Fig. 2)
R1 = 10KΩ,R2 = ∞ IKA = 10mA
Ta = Full range (Fig. 2)
VKA = VREF (Fig.1)
VKA = 36V, VREF = 0V (Fig. 3)
V KA = VREF V KA = VREF
∆IKA = 0.1mA ~ 15mA
Frequency ≤ 1KHz (Fig.1)
Reference voltage
Deviation of Reference input voltage over
temperature (Note 8)
Ratio of the change in Reference voltage to
the change in Cathode voltage
Reference input current
Deviation of Reference input current over
temperature
Minimum Cathode current for regulation
Off-state current
Dynamic output impedance (Note 9)
SYMBOL MIN.
TYP. MAX. UNIT
VREF
2.470
2.482
2.495
2.520
2.507
V
VREF
⎯
8.0
20
mV
∆VREF
∆VKA
IREF
⎯
⎯
⎯
-1.4
-1
1.4
-2.0
-2
3.5
mV/V
mV/V
µA
αIREF
⎯
0.4
1.2
µA
IKA(MIN)
IKA(OFF)
⎯
⎯
0.19
0.1
0.5
1.0
mA
µA
|ZKA|
⎯
0.2
0.5
Ω
VMAX
VDEV = VMAX - VMIN
VMIN
TI
Temperature
T2
Note: 8. 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:
VDEV
) ⋅10 6
VREF (25°C)
……………………..……………….. ( ppm
)
=
°C
T2 − T1
(
α VREF
Where:
T2 – T1 = full temperature change.
αVREF can be positive or negative depending on whether the slope is positive or negative.
Note: 9. The dynamic output impedance, RZ, is defined as:
Z KA =
∆ V KA
∆ IKA
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:
'
Z KA =
∆v
≈ Z KA
∆i
AP431/AP431A Rev. 5
(1 +
R1
)
R2
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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Test Circuits
Input
IN
VKA
IKA
IKA
VKA
R1
VREF
IN
R2
VKA
IREF
VREF
IZ(OFF)
Note:VKA=VREF(1+R1/R2)+IREFxR1
Fig 1. Test Circuit for VKA= VREF
AP431/AP431A Rev. 5
Fig 2. Test Circuit for VKA > VREF
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Fig 3. Test Circuit for Off-State Current
MARCH 2007
© Diodes Incorporated
AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics
Cathode Current vs Cathode Voltage
Cathode Current (uA) vs Cathode Voltage
600
VKA =Vref
Ta=25oC
Cathode Current (uA)
Cathode Current (mA)
100
0
-100
0.5
-0.5
1.5
Cathode Voltage (v)
-1.5
Reference Voltage vs Free-Air Temperature
200
0
-0.5
0
0.5
1.5
1
Cathode Voltage(v)
2
2.5
Reference Input Current vs Free Temperature
2495
2490
2485
2480
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Free-Air Temperature (oC)
Reference Input Current (uA)
2
2500
Reference Voltage (mV)
400
-200
-1
2.5
VKA =Vref
Ta=25oC
1.8
R1=10K
IKA=10mA
1.6
1.4
1.2
1
-50
-25
0
25
50
75
Free-Air Temperature (oC)
100
125
Change in Reference Voltage (mv)
Change in Reference Voltage vs Cathode Voltage
0
-2
IKA=10mA
Ta=25oC
-4
-6
-8
-10
-12
0
5
AP431/AP431A Rev. 5
10
15
20
Cathode Voltage (V)
25
30
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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics
( Continued )
Small-Signal Voltage Amplification vs Frequency
IKA=10mA
TA=25oC
50
Output
15KΩ
40
+
9µF
30
IKA
232Ω
+
-
AV-Small Signal Voltage Amplification (dB)
60
-
8.25KΩ
GND
20
Test Circuit for Voltage Amplification
10
0
10K
1K
100K
f-Frequency-Hz
1M
10M
Reference Impedance vs Frequency
| ZKA | Reference Impedance (Ω)
100
I KA=10mA
o
TA =25 C
1KΩ
Output
I KA
10
50Ω
+
GND
1
Test Circuit for Reference Impedance
0.1
1K
10K
100K
1M
10M
f-Frequency-Hz
AP431/AP431A Rev. 5
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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics
( Continued )
Pulse Response
6
TA=25oC
Input
Input and Output Voltage-V
5
220Ω
4
Pulse
Generator
f=100kHz
3
Output
50Ω
Output
GND
2
Test Circuit for Pulse Response
1
0
-1
0
1
2
3
4
5
6
7
t-Time-µS
150Ω
STABILITY BOUNDARY CONDITIONS†
100
90
IKA-Cathode Current-mA
80
TA=25oC
A VKA=Vref
I KA
B VKA=5V
C VKA=10V
D VKA=15V
CL
B
VBATT
C
Stable
50
-
Stable
70
60
+
Test Circuit for Curve A
A
40
30
D
I KA
20
10
CL
0
0.001
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 C L =0.V BATT and
CL were then adjusted to determine the ranges of stability.
AP431/AP431A Rev. 5
150Ω
R1=10KΩ
9 of 14
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+
-
VBATT
Test Circuit for Curve B, C, and D
MARCH 2007
© Diodes Incorporated
AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Application Examples
VIN
V IN
R CL
R
R1B
R1A
R2A
R2B
OFF
LED on when Low Limit < VIN < High Limit
Low Limit ≈ VREF (1+R1B/R2B)
High Limit ≈ VREF (1+R1A/R2A)
+
Delay = RC x ln (
VIN
)
V IN -VREF
I OUT = V REF / RCL
Fig. 5 Delay
Timer
Fig. 4 Voltage
Monitor
V IN
O
N
I OUT
Fig. 6 Current Limiter or Current
Source
V IN
V OUT
V IN
R
1
R
2
R
2
LIMIT
V OUT = (1 + R1/R2) x VREF
I OUT = V REF / RS
Fig. 7 Constant-Current
Sink
V OUT
PULSE
R
1
RS
I OUT
V IN
Fig. 8 Higher-Current Shunt
Regulator
(1 + R1/R2) x VREF
Fig. 9 Crow Bar
VIN
R1A
R1B
+
R2A
Low Limit
High Limit
R2B
Output ON when
Low Limit <VIN < High Limit
V BE
V REF (1 + R1B/R2B) +VBE
V REF (1 + R1A/R2A)
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
AP431/AP431A Rev. 5
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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Marking Information
(1) SOT23(R)/SOT25/SC59
(Top View)
Y : Year
M : Month (A~L)
X : L : Lead Free
G : Green
XX Y M X
Marking Code
SOT23(R)/ SOT25/SC59
(2) SOP-8L
(Top view)
8
5
Accuracy
Blank: 2.495±1%
A: 2.495 ±0.5%
Logo
AP431 X
YY WW X
Part Number
4
1
L : Lead-Free Package
G : Green
WW : Nth week
YY : Year
SOP-8L
(3) TO92-3L
(Top View)
Accuracy
Blank: 2.495 + 1%
A: 2.495 + 0.5%
AP431
X Y WW X X
L : Lead Free
Y : Year
WW :Nth week
X : Internal code
TO92-3L
AP431/AP431A Rev. 5
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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Marking Code Table
Device
AP431SA
AP431ASA
AP431SR
AP431ASR
AP431Q
AP431AQ
AP431W
AP431AW
AP431R
AP431AR
Package (Note 10)
Marking Code
Date Code
D1
D2
D5
D6
A2
A3
A6
A7
A8
A9
YM
YM
YM
YM
YM
YM
YM
YM
YM
YM
SOT23
SOT23
SOT23R
SOT23R
SOT25
SOT25
SC59
SC59
SC59
SC59
Note: 10. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
AP431/AP431A Rev. 5
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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Package Information
( All Dimensions in mm )
(1) SOT25
(2) SC59
2.70/3.00
Typ 2.80
TOP VIEW
2.70/
3.00
1.90
2.90/3.10
Typ 3.00
2.90/3.10
1.00/1.30
Typ 1.10
0.013/0.10
Typ 0.05
1.50/
1.70
TOP VIEW
1.50/1.70
Typ 1.60
0.35/0.50
1.00/
1.30
0.10/0.20 Typ 0.15
Typ Typ
0.95 0.55
0.013/0.10
0.35/0.55
Typ 0.40
0.10/0.20
0.95
0.35/0.55
0°/8°
(3) SOT23(R)
(4) SOP-8L
0.37/0.51
1.20/1.40
2.30/2.50
8
1
5
5.90/6.10
Typ 6.00
°
4
TOP VIEW
0.45/0.60
0.89/
1.03
1.80/2.00
9°
1.40/1.50
Typ 1.45
0.45/0.61
R
1
0.
0º/8º
AP431/AP431A Rev. 5
0.08/0.25
Typ 0.15
4.85/4.95
Typ 4.90
1.27
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°
°
45
0.085/0.180
0.35
3
0.013/
0.10
3.80/3.90
Typ 3.85
(A
ll s
i de
)
4
0.903/
1.10
2.80/3.00
0.30/0.50
Typ 0.40
°
3.85/3.95
Typ 3.90
0.60/0.70
Typ 0.65
0.15/0.25
Typ 0.20
0.60/
0
Typ .80
0. 70
MARCH 2007
© Diodes Incorporated
AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Package Information
( Continued ) ( All Dimensions in mm )
(5) TO92-3L for Ammo pack
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products 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 our website, harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
President of Diodes Incorporated.
AP431/AP431A Rev. 5
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