ADDtek AMC431BDB Precision adjustable shunt voltage reference Datasheet

AMC431
PRECISION ADJUSTABLE
SHUNT VOLTAGE REFERENCE
www.addmtek.com
DESCRIPTION
FEATURES
„
The AMC431 is a three-terminal adjustable shunt
voltage regulator with specified thermal stability and
pin-to-pin compatible with the earlier 431 series. The
output voltage can be adjusted to any value between VREF
and 36V by using two external resistors. The AMC431
offers low output impedance for improved load regulation
with a typical output impedance of 200mΩ. Because of
the active output circuitry, the AMC431can replace the
zener diodes in applications such as switching power
supplies, OVP crowbar circuits, references for A/D, D/A
converters with improved turn-on characteristics.
„
„
„
„
„
„
„
Initial voltage reference accuracy of 0.5%,
1.0%, and 1.5%
Sink current capability from 1mA to 100mA
Typical output dynamic impedance less than
200mΩ;
Adjustable output voltage from VREF to 36V
Available in 3L-TO92 and surface mount SOT89,
SOT23.
Low output noise
Typical equivalent full range temperature
coefficient of 30ppm/°C
Pin assignment identical to earlier TL431 series.
APPLICATIONS
„
„
„
„
„
PACKAGE PIN OUT
Voltage Reference
Precision shunt regulator
High current shunt regulator
PWM down converter with
reference
Voltage monitor
CATHODE
CATHODE
ANODE
ANODE
VREF
VREF
3-Pin Plastic TO-92
(Top View)
3-Pin Plastic SOT-23
Surface Mount
(Top View) (Note 1)
VREF
CATHODE
ANODE
ANODE
CATHODE
VREF
3-Pin Plastic SOT-89
Surface Mount
(Top View)
Initial
TA (°C) Tolerance
0 to 70
1.5%
1.5%
1%
1%
0.5%
0.5%
LP
TO-92
3-pin
AMC431CLP
3-Pin Plastic SOT-23
Surface Mount
(Note 2)
(Top View)
ORDER INFORMATION
SOT-89
SOT-23
PK
DB
3-pin
3-pin
DB
SOT-23
3-pin
--
--
AMC431CLPF(Lead Free) --
--
---
AMC431LP
AMC431PK
AMC431DB
AMC431RDB
AMC431LPF(Lead Free)
AMC431PKF(Lead Free)
AMC431DBF(Lead Free)
AMC431RDBF(Lead Free)
AMC431BLP
AMC431BPK
AMC431BDB
AMC431BRDB
AMC431BLPF(Lead Free) AMC431BPKF(Lead Free) AMC431BDBF(Lead Free) AMC431BRDBF(Lead Free)
Note: 1. For AMC431RDB and AMC431BRDB.
2. For AMC431DB and AMC431BDB.
3. For surface-mount and TO-92 packages in Tape & Reel, add suffix “T” (e.g., AMC431LPT, AMC431DBT).
4. For TO-92 in Tape & Box (without reel), add suffix “TB” (e.g., AMC431LPTB).
5. DB package is only available in Tape & Reel.
6. The letter “F” is marked for Lead Free process.
Copyright © 2006 ADDtek Corp.
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AMC431
TYPICAL APPLICATION
BLOCK DIAGRAM
VO = 5V
CATHODE
V+
Rb
REF
R1
27.5K
0.1%
Note: Rb should
provide cathode
current ≥ 1mA
+
-
R2
27.5K
0.1%
5V Precision Regulator
VREF
ANODE
ABSOLUTE MAXIMUM RATINGS
Cathode to Anode Voltage (VKA) (Note 2)
Continuous Cathode Current (IK)
Reference Input Current (IREF)
Maximum junction temperature range, TJ
Storage temperature range
Lead temperature (soldiering, 10 seconds)
Note 1:
Note 2:
(Note 1)
-0.3V to 37V
-100mA to 150mA
-50uA to 10mA
150°C
-65OC to 150OC
260°C
Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into,
negative out of the specified terminal.
Voltage values are with respect to the anode terminal unless otherwise noted.
POWER DISSIPATION TABLE
TA=70°C
Derating factor
TA ≤ 25°C
Power rating(mW)
Power rating(mW)
DF(mW/°C)
TA ≥ 25°C
6.41
801
513
Package
θJA
(°C /W )
LP
156
LPF
156
6.41
801
513
417
PK
71(note)
14.1
1763
1128
916
PKF
71(note)
14.1
1763
1128
916
DB
285
3.5
438
280
228
DBF
285
3.5
438
280
228
TA= 85°C
Power rating (mW)
417
Note :1.For PK package, Thermal Resistance-Junction to Tab ( θJT ) = 35°C /W. TJ = TTAB + (PD × θJT).
PD: Power Dissipation.
2.θJA: Thermal Resistance-Junction to Ambient, DF = 1/θJA
Junction Temperature Calculation: TJ = TA + (PD × θJA).
The θJA numbers are guidelines for the thermal performance of the device/PC-board system.
All of the above assume no ambient airflow.
Copyright © 2006 ADDtek Corp.
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AMC431
RECOMMENDED OPERATING CONDITIONS
Parameter
Operating free air temperature range, TA
Cathode current, IK
Cathode voltage, VKA
Min
Max
Units
0
1
0
70
100
36
°C
mA
V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperatures with TA = 25°C.
Parameter
Symbol
Reference Input Voltage
Reference Input Voltage
Reference Input Voltage
Reference Drift
Voltage Ratio, Ref to Cathode
(note 4)
VREF
VREF
VREF
Reference Input Current
IREF
Minimum Operating Current
Off-State Cathode Current
IMIN
IOFF
Dynamic Impedance
|ZKA |
Note 1:
For AMC431 only. The output accuracy is 1.0%.
Note 2:
For AMC431C only. The output accuracy is 1.5%.
Note 3:
For AMC431B only. The output accuracy is 0.5%.
Note 4:
VREF
Test Conditions
AMC431
Units
Min Typ Max
IK = 10mA, VKA = VREF, note 1
2.475 2.500 2.525 V
IK = 10mA, VKA = VREF, note 2
2.462 2.500 2.538 V
IK = 10mA, VKA = VREF, note 3
2.487 2.500 2.513 V
4
17 mV
IK = 10mA, VKA = VREF, 0°C ≤ TA ≤ 70°C
mV/
IK = 10mA, VKA = 2.5V to 36V
-1.4 -2.7
V
IK = 10mA,VKA = VREF
2.3
µA
2
4
IK = 10mA,VKA = VREF, 0°C ≤ TA ≤ 70°C
VKA = VREF
0.4
1
mA
VKA = 36V, VREF = 0V
0.1
1
µA
VKA = VREF, IK = 1mA to 100mA,
0.2
0.5
Ω
f ≤ 1kHz
Ratio of change in reference input voltage to the change in cathode voltage
VKA
Copyright © 2006 ADDtek Corp.
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AMC431
PARAMETER MEASUREMENT INFORMATION
Input
VKA
Input
VKA
R1
IREF
R2
VRE
Figure 2. Test Circuit for VKA > VREF
Figure 1. Test Circuit for VKA = VREF
Input
VKA
IOFF
Figure 3. Test Circuit for IOFF
Copyright © 2006 ADDtek Corp.
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AMC431
CHARACTERIZATION CURVES
CATHODE CURRENT vs CATHODE VOLTAGE
CATHODE CURRENT vs CATHODE VOLTAGE
150
125
800
VKA = VREF
TA = 25°C
VKA = VREF
TA = 25°C
600
75
IKA – Cathode Current (µA)
IKA – Cathode Current (mA)
100
50
25
0
-25
-50
Imin
400
200
0
-75
-100
-2
-200
-1
0
1
VKA – Cathode Voltage (V)
2
3
-1
2600
2580
3
5
VKA = VREF
2560
2540
2520
IKA = 100mA
2500
2480
2
REFERENCE INPUT CURRENT vs FREE-AIR TEMPERATURE
IREF – Reference Input Current (µA)
VREF – Reference Input Voltage (mV)
REFERENCE INPUT VOLTAGE vs FREE-AIR EMPERATURE
0
1
VKA – Cathode Voltage (V)
IKA = 10mA
2460
2440
4
R1 = 10 k Ω
R2 = ∞
IKA = 10mA
3
2
1
2420
2400
-75
0
-50
-25
0
25
50
75
100
125
-75
TA – Free-Air Temperature - °C
Copyright © 2006 ADDtek Corp.
5
-50 -25
0
25
50
75
TA – Free-Air Temperature - °C
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AMC431
APPLICATION INFORMATION
VBATT
R*
VO
R1
0.1%
VBATT
AMC431
VO
AMC431
VREF
Von ≈ 2V
Voff ≈ VBATT
Input
R2
0.1%
Vth = 2.5V
GND
VO = (1 + R1/R2) × VREF
Note: R should provide 1mA cathode current to the AMC431 of
minimum VBATT
Figure 4. Shunt Regulator
VBATT
Figure 5. Single –Supply Comparator With
Temperature compensated threshold.
VO
VBATT
VO
R1
R1
AMC431
R2
C
R2
AMC431
VO = (1 + R1/R2) × VREF
Figure 7. Crowbar Circuit
Figure 6. High-Current Shunt Regulator
Copyright © 2006 ADDtek Corp.
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AMC431
APPLICATION INFORMATION (continued)
VBATT
VBATT
VO = 5V/1.5A
AMC317
IO =
VREF/RS
Adjust
8.2KΩ
243Ω
0.1%
AMC431
AMC431
RS
0.1%
243Ω
0.1%
Figure 8.Precision 5V, 1.5A Regulator
VBATT
Figure 9. Precision Constant Current Sink
AMC78L05
Common
OUT
VBATT
VO
R1
IO
RCL
0.1%
IN
R1
AMC431
R2
AMC431
IOUT = (VREF/RCL) + IKA
R1 = VBATT/((IO/hFE) + IKA)
VO = (1 + R1/R2) × VREF
Min VO = VREF + 5V
Figure 10. Output Control of a Three-Terminal
Fixed Regulator
Copyright © 2006 ADDtek Corp.
Figure 11. Precision Current Limiter
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AMC431
PACKAGE
3-Pin Plastic TO-92
B
INCHES
K
MILLIMETERS
M
MIN
A
G
MAX
MIN
TYP
MAX
A
0.175 0.180 0.205
TYP
4.45
4.57
5.21
B
0.170 0.180 0.210
4.32
4.57
5.33
C 0.125 0.142 0.165
3.18
3.62
4.19
-
0.38
-
F
F
C
-
0.015
-
G
-
0.050
-
-
1.27
-
J
-
0.150
-
-
3.81
-
0.500 0.580
-
12.70 14.73
-
N
K
M
-
5º
-
-
5º
-
N
-
5º
-
-
5º
-
Note: For TO-92 in taping, refer to TO-92 package and taping dimension data for lead
dimensions.
3-Pin Plastic TO-92 Package and Taping Dimensions
P
P1
INCHES
MIN
C
C 0.079
P
Ho
W1
Wo
W
F1
Do
Copyright © 2006 ADDtek Corp.
Po
Fo
8
MILLIMETERS
TYP
MAX
MIN
TYP
MAX
-
-
2.00
-
-
0.480 0.500 0.520
12.2
12.7
13.2
Po 0.488 0.500 0.512
12.4
12.7
13.0
Do 0.150 0.157 0.165
3.8
4.0
4.2
P1 0.230 0.250 0.256
5.85
6.35
6.85
Fo 0.165 0.197 0.220
4.2
5.0
5.6
W 0.669 0.709 0.748
17.0
18.0
19.0
Ho 0.610 0.630 0.649
15.5
16.0
16.5
Wo 0.224 0.236 0.248
5.7
6.0
6.3
W1 0.335 0.354 0.374
8.5
9.0
9.5
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AMC431
3-Pin Surface Mount SOT-89
INCHES
A
C
D
L
B
K
E
N
M
F
MIN
TYP
MAX
MIN
TYP
MAX
A
0.173
-
0.181
4.39
-
4.59
B
0.090
-
0.102
2.28
-
2.59
C 0.055
-
0.063
1.39
-
1.60
D 0.015
-
0.017
0.38
-
0.43
E
0.084
-
0.090
2.13
-
2.28
F
0.016
-
0.019
0.33
-
0.48
G
0.059 BSC
1.49 BSC
H
0.118 BSC
2.99 BSC
J
J
G
H
MILLIMETERS
0.018
-
0.022
0.45
-
0.55
K
0.155
-
0.167
3.94
-
4.24
L
0.067
-
0.072
1.70
-
1.82
M
0°
N 0.035
-
8°
0°
-
8°
-
0.047
0.89
-
1.19
MAX
MIN
TYP
MAX
Surface Mount SOT-23
D
C
INCHES
MIN
L
A
1.00
1.10
1.30
0.004
0.00
-
0.10
A2 0.028 0.032 0.035
0.70
0.80
0.90
b
M
e
A
A2
A1
MILLIMETERS
0.039 0.043 0.051
A1 0.000
H
H
E
TYP
-
0.014 0.016 0.020
0.35
0.40
0.50
C 0.004 0.005 0.010
0.10
0.15
0.25
D 0.106 0.114 0.122
2.70
2.90
3.10
E
0.055 0.063 0.071
1.40
1.60
1.80
e
0.075 TYP.
1.90 TYP.
H 0.102 0.110 0.118
2.60
2.80
3.00
L
0.015
-
-
0.37
-
-
M
1°
5°
9°
1°
5°
9°
b
Copyright © 2006 ADDtek Corp.
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AMC431
IMPORTANT NOTICE
ADDtek reserves the right to make changes to its products or to discontinue any integrated circuit product or service
without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing
orders, that the information being relied on is current.
A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe
property or environmental damage. ADDtek integrated circuit products are not designed, intended, authorized, or
warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of
ADDtek products in such applications is understood to be fully at the risk of the customer. In order to minimize risks
associated with the customer’s applications, the customer should provide adequate design and operating safeguards.
ADDtek assumes to no liability to customer product design or application support. ADDtek warrants the performance of
its products to the specifications applicable at the time of sale.
ADDtek Corp.
9F, No. 20, Sec. 3, Bade Rd., Taipei, Taiwan, 105
TEL: 2-25700299
FAX: 2-25700196
Copyright © 2006 ADDtek Corp.
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