ETC2 AMC431BPK Precision adjustable shunt voltage reference Datasheet

AMC DOC. #: AMC431_C
November 2002
AMC431

ADD MICROTECH CORP.
PRECISION ADJUSTABLE SHUNT
VOLTAGE REFERENCE
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
Ω;
Adjustable output voltage from VREF to 36V
Available in 3L-TO92 and surface mount
SOT89, SOT23 and 8 pin S.O.I.C. packages
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
ANODE
VREF
ANODE
ANODE
ANODE
ANODE
NC
NC
8-Pin Plastic S.O.I.C.
Surface Mount
(Top View)
3-Pin Plastic TO-92
(Top View)
VREF
CATHODE
ANODE
VREF
CATHODE
CATHODE
CATHODE
ANODE
ANODE
VREF
CATHODE
VREF
(Note 1)
3-Pin Plastic SOT-23
Surface Mount
(Top View)
3-Pin Plastic SOT-89
Surface Mount
(Top View)
(Note 2)
3-Pin Plastic SOT-23
Surface Mount
(Top View)
ORDER INFORMATION
TA (°C)
0 to 70
Initial
Tolerance
DM
SOIC
8-pin
LP
TO-92
3-pin
PK
SOT-89
3-pin
DB
SOT-23
3-pin
DB
SOT-23
3-pin
1.5%
--
AMC431CLP
--
--
--
1%
AMC431DM
AMC431LP
AMC431PK
AMC431DB
AMC431RDB
0.5%
AMC431BPK
AMC431BDB
AMC431BRDB
-AMC431BLP
Note: 1. For AMC431DB and AMC431BDB.
2. For AMC431RDB and AMC431BRDB.
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.
Copyright  2002, ADD Microtech Corp.
1
www.addmtek.com
AMC431
AMC DOC. #: AMC431_C
November
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
2002
TYPICAL APPLICATION
BLOCK DIAGRAM
VO = 5V
V+
CATHODE
Rb
Note: Rb should
provide cathode
current ≥ 1mA
R1
27.5K
0.1%
+
REF
-
R2
27.5K
0.1%
VREF
ANODE
5V Precision Regulator
ABSOLUTE MAXIMUM RATINGS (Note 1)
-0.3V to 37V
Cathode to Anode Voltage (VKA) (Note 2)
-100mA
to 150mA
Continuous Cathode Current (IK)
-50uA to 10mA
Reference Input Current (IREF)
150°C
Maximum junction temperature range, TJ
Storage temperature range
-65OC to 150OC
Lead temperature (soldiering, 10 seconds)
260°C
Note 1: 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.
Note 2: Voltage values are with respect to the anode terminal unless otherwise noted.
POWER DISSIPATION TABLE
Package
θJA
Derating factor DF(mW/°C)
TA ≥ 25°C
(°C /W )
TA ≤ 25°C
Power rating(mW)
TA=70°C
Power rating(mW)
TA= 85°C
Power rating (mW)
DM
165
6.06
757
485
394
LP
156
6.41
801
513
417
PK
71(note)
14.1
1763
1128
916
DB
285
3.5
438
280
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  2002, ADD Microtech Corp.
2
228
www.addmtek.com
AMC431
AMC DOC. #: AMC431_C
November
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
2002
RECOMMENDED OPERATING CONDITIONS
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
Reference Input Voltage
Reference Input Voltage
Reference Input Voltage
Reference Drift
Voltage Ratio, Ref to Cathode
(note 4)
Symbol
VREF
VREF
VREF
Test Conditions
AMC431
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
IK = 10mA, VKA = 2.5V to 36V
IK = 10mA,VKA = VREF
IK = 10mA,VKA = VREF, 0°C ≤ TA ≤ 70°C
Minimum Operating Current
IMIN
VKA = VREF
VKA = 36V, VREF = 0V
Off-State Cathode Current
IOFF
VKA = VREF, IK = 1mA to 100mA,
Dynamic Impedance
|ZKA |
f ≤ 1kHz
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%.
VREF
Note 4:
Ratio of change in reference input voltage to the change in cathode voltage
VKA
Reference Input Current
Copyright  2002, ADD Microtech Corp.
Units
IREF
3
-1.4 -2.7 mV/V
2
0.4
2.3
4
1
mA
0.1
1
µA
0.2
0.5
Ω
µA
www.addmtek.com
AMC431
AMC DOC. #: AMC431_C
November
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
2002
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  2002, ADD Microtech Corp.
4
www.addmtek.com
AMC431
AMC DOC. #: AMC431_C
November
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
2002
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
µA)
IKA – Cathode Current (µ
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
3
5
IREF – Reference Input Current (µ
µA)
VREF – Reference Input Voltage (mV)
2600
VKA = VREF
2560
2540
2520
IKA = 100mA
2500
2480
2
REFERENCE INPUT CURRENT
vs
FREE-AIR TEMPERATURE
REFERENCE INPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
2580
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  2002, ADD Microtech Corp.
5
-50 -25
0
25
50
75
TA – Free-Air Temperature - °C
100
125
www.addmtek.com
AMC431
AMC DOC. #: AMC431_C
November
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
2002
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 5. Single –Supply Comparator With
Temperature compensated threshold.
Figure 4. Shunt Regulator
VBATT
VO
VO
VBATT
R1
R1
AMC431
R2
R2
AMC431
C
VO = (1 + R1/R2) × VREF
Figure 7. Crowbar Circuit
Figure 6. High-Current Shunt Regulator
Copyright  2002, ADD Microtech Corp.
6
www.addmtek.com
AMC431
AMC DOC. #: AMC431_C
November
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
2002
APPLICATION INFORMATION (continued)
VBATT
VO = 5V/1.5A
AMC317
VBATT
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
RCL
0.1%
IN
AMC78L05
Common
OUT
VO
VBATT
R1
IO
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  2002, ADD Microtech Corp.
Figure 11. Precision Current Limiter
7
www.addmtek.com
AMC431
AMC DOC. #: AMC431_C
November
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
2002
3-Pin Plastic TO-92
B
INCHES
K
MILLIMETERS
M
MIN
A
G
F
C
TYP
MAX
MIN
TYP
MAX
A
0.175 0.180 0.205
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
F
-
0.015
-
-
0.38
-
G
-
0.050
-
-
1.27
-
-
0.150
-
-
3.81
-
0.500 0.580
-
12.70 14.73
-
J
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  2002, ADD Microtech 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
www.addmtek.com
AMC431
AMC DOC. #: AMC431_C
November
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
2002
8-Pin Plastic S.O.I.C.
B
P
F
G
D
MIN
TYP
MAX
MIN
TYP
MAX
A
0.183
-
0.202
4.65
-
5.13
B
0.144
-
0.163
3.66
-
4.14
C 0.068
-
0.074
1.73
-
1.88
D 0.010
-
0.020
0.25
-
0.51
F
-
0.035
0.38
-
0.89
0.015
G
L
J
C
SEATING
PLAN
seating
plane
MILLIMETERS
INCHES
A
M
K
J
0.050 BSC
0.007
-
1.27 BSC
0.010
0.19
-
0.25
K
0.005
-
0.010
0.13
-
0.25
L
0.189
-
0.205
4.80
-
5.21
M
-
-
8º
-
-
8º
P
0.228
-
0.244
5.79
-
6.20
3-Pin Surface Mount SOT-89
INCHES
A
C
D
L
B
K
N
E
M
F
J
G
H
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
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°
-
8°
0°
-
8°
-
0.047
0.89
-
1.19
N 0.035
Copyright  2002, ADD Microtech Corp.
9
MILLIMETERS
MIN
www.addmtek.com
AMC431
AMC DOC. #: AMC431_C
November
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
2002
Surface Mount SOT-23
D
INCHES
C
MIN
L
H
E
A
MIN
TYP
MAX
0.039 0.043 0.051
1.00
1.10
1.30
0.00
-
0.10
-
0.004
A2 0.028 0.032 0.035
0.70
0.80
0.90
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.
b
M
e
A
A2
MAX
A1 0.000
TYP
MILLIMETERS
A1
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  2002, ADD Microtech Corp.
10
www.addmtek.com
AMC431
AMC DOC. #: AMC431_C
November
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
2002
IMPORTANT NOTICE
ADD Microtech (ADDM) 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. ADDM 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
ADDM 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.
ADDM assumes to no liability to customer product design or application support. ADDM warrants the performance of
its products to the specifications applicable at the time of sale.
U.S.
Asia Pacific region
ADD Microtech Inc.
492 Altamont Drive
Milpitas, CA 95035
ADD Microtech Corp
3F, 132, Sec. 4, Chung Hsiao E. Rd.,
Taipei, Taiwan
T E L : (408) 9410420
FA X : (408) 9410864
T E L : 2-27760166
FA X : 2-27764208
Copyright  2002, ADD Microtech Corp.
11
www.addmtek.com
Similar pages