ETC1 B431BR 2.5v adjustable shunt regulator Datasheet

Bay Linear
Inspire the Linear Power
B431
2.5V Adjustable Shunt Regulator
Description
Features
The Bay Linear B431 is a three terminal adjustable shunt
regulator with thermal stability over Temperature range. Using
two external resistors allows the output voltage to be adjusted
from 2.5V to 36V. With a sharp turn on characteristics the
B431 a superior replacement for zener diode applications.
•
•
•
•
•
Wide Operating Range …1mA to100mA
Tight Band Gap Tolerance …….… 0.5%
Low Temp. Coefficient………..30 ppm/oC
Wide temp range of –40 to +105oC
Available in TO92, SOT-89, SO-8
The B431 shunt regulator has a tolerance of 0.5% which has
proven to be sufficient to overcome all of the other errors in
the system to virtually eliminate the need for trimming in the
power supply manufacturers assembly line and contribute a
significant cost savings.
Applications
•
•
•
•
•
•
Package Information
TO-92 (Z)
1
Ref
2
Switching Power Supplies
Adjustable Power Supplies
Linear Regulators
Battery Powered Equipment
Monitors, TV, VCR
Instrumentation
Ordering Information
Package
Tolerance
0.5%
3
Anode Cath
Bottom View
1%
1%
2%
B431AZ
B431BZ
B431DBZ B431CZ
B431AR B431BR
B431DBR B431CR
B431AM B431BM
B431DBM B431CM
The Electrical Grade & Type is specified on shipping Box Only
TO-92
SOT-89
8SOIC
8-Pin Surface Mount (M)
1
8
2
7
3
6
4
5
Top View
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94506
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B431
Absolute Max Ratings
Parameter
Cathode Voltage
Continuous Cathode Current
Reference Input Current
Power Dissipation at TA - 25°C
SOT-89
S0-8
TO-92
Thermal Resistance
S0-8
TO-92
SOT-89
Operating Junction Temperature Range
Operating Ambient Temperature
Storage Temperature Range
Lead Temperature (Soldering) 10 seconds
ESD Rating (Human Body Model)
Symbol
Maximum
Units
Vz
Iz
IREF
37
150
10
V
mA
mA
PD
1000
750
775
mW
OJA
°C/W
TJ
TA
TSTG
175
160
110
-40 to +150
-40 to +105
-65 to +150
TLEAD
TESD
300
2
°C
kV
°C
°C
°C
Recommended Operating Conditions
Cathode Voltage, Vz
Cathode Current, Iz
Min
Max
Symbol
VREF
0.1
36
100
V
mA
Electrical Characteristics
Unless specified: T٨ = 25°C. Values in bold apply over full operating ambient temperature.
B431 0.5%
Parameter
Reference Voltage
VREF Temp Deviation
Ratio of Change in
VREF To Change in VZ
Reference Input
Current
IREF Temperature
Deviation
Off-State Cathode
Current
Dynamic Output
Impedance
Minimum Operating
Current
Bay Linear, Inc
Symbol
VREF
VDEV
∆ VREF
∆VZ
IREF
IREF(DEV)
Condition
VZ = VREF1 IZ = 10mA(1)
VZ = VREF1 IZ = 10mA(1)
IZ = 10mA,∆VZ = 10V to VRef
IZ = 10mA,∆VZ = 36V to 10V
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
Min
2.483
Typ
2.495
4
-1.0
-0.4
Max
2.507
17
-2.7
-2.0
Units
V
mV
0.7
4
µA
0.4
1.2
µA
mV/V
IZ (OFF)
VREF = 0V, VZ =36V(3)
0.1
1
µA
rz
F <1kHz, VZ = VREF
IZ = 1mA to 100mA(1)
0.20
0.50
Ω
IZ(MIN)
VZ = VREF(1)
0.4
1
mA
2418 Armstrong Street, Livermore, CA 94506
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B431
B431 1%
Parameter
Reference Voltage
VREF Temp Deviation
Ratio of Change in
VREF To Change in VZ
Reference Input
Current
IREF Temperature
Deviation
Off-State Cathode
Current
Dynamic Output
Impedance
Minimum Operating
Current
Symbol
VREF
VDEV
∆ VREF
∆VZ
IREF
IREF(DEV)
Condition
VZ = VREF1 IZ = 10mA(1)
VZ = VREF1 IZ = 10mA(1)
IZ = 10mA,∆VZ = 10V to VRef
IZ = 10mA,∆VZ = 36V to 10V
Min
2.470
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
Typ
2.495
4
-1.0
-0.4
Max
2.520
17
-2.7
-2.0
Units
V
mV
0.7
4
µA
0.4
1.2
µA
mV/V
IZ (OFF)
VREF = 0V, VZ =36V(3)
0.1
1
µA
rz
F <1kHz, VZ = VREF
IZ = 1mA to 100mA(1)
0.20
0.50
Ω
IZ(MIN)
VZ = VREF(1)
0.4
1
mA
Typ
2.495
4
-1.0
-0.4
Max
2.545
17
-2.7
-2.0
Units
V
mV
0.7
4
µA
0.4
1.2
µA
B431 2%
Parameter
Reference Voltage
VREF Temp Deviation
Ratio of Change in
VREF To Change in VZ
Reference Input
Current
IREF Temperature
Deviation
Off-State Cathode
Current
Dynamic Output
Impedance
Minimum Operating
Current
Bay Linear, Inc
Symbol
VREF
VDEV
∆ VREF
∆VZ
IREF
IREF(DEV)
Condition
VZ = VREF1 IZ = 10mA(1)
VZ = VREF1 IZ = 10mA(1)
IZ = 10mA,∆VZ = 10V to VRef
IZ = 10mA,∆VZ = 36V to 10V
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
Min
2.445
mV/V
IZ (OFF)
VREF = 0V, VZ =36V(3)
0.1
1
µA
rz
F <1kHz, VZ = VREF
IZ = 1mA to 100mA(1)
0.20
0.50
Ω
IZ(MIN)
VZ = VREF(1)
0.4
1
mA
2418 Armstrong Street, Livermore, CA 94506
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B431
B431D 1%
Parameter
Reference Voltage
VREF Temp Deviation
Ratio of Change in
VREF To Change in VZ
Symbol
VREF
VDEV
∆ VREF
∆VZ
Condition
VZ = VREF1 IZ = 10mA(1)
VZ = VREF1 IZ = 10mA(1)
IZ = 10mA,∆VZ = 10V to VRef
IZ = 10mA,∆VZ = 36V to 10V
Reference Input
R1 = 10kΩ, R2 = ∞,
IREF
Current
IZ = 10mA(2)
IREF Temperature
R1 = 10kΩ, R2 = ∞,
IREF(DEV)
Deviation
IZ = 10mA(2)
Off-State Cathode
IZ (OFF)
VREF = 0V, VZ =36V(3)
Current
Dynamic Output
F <1kHz, VZ = VREF
rz
Impedance
IZ = 1mA to 100mA(1)
Minimum Operating
IZ(MIN)
VZ = VREF(1)
Current
Note 1: B431D is rated at -40°C to +85°C and 50ppm/°C
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94506
Min
2.470
Typ
2.495
4
-1.0
-0.4
Max
2.520
17
-2.7
-2.0
0.7
4
µA
0.4
1.2
µA
0.1
1
µA
0.20
0.50
Ω
0.4
1
mA
Tel: (925) 606-5950, Fax: (925) 940-9556
Units
V
mV
mV/V
www.baylinear.com
B431
mV
%
0
0
∆VREF
∆Τ
-10
5000
TC in %/°C =
0.5
-20
∆VREF (mV)
TC in mV/°C =
-55
-25
0
25
50
75
∆TA
TC in ppm/°C =
100 125
∆VREF
VREF at 25°C
)
x 100
∆TA
∆VREF
VREF at 25°C
)
0
)
ppm
Calculating Average Temperature Coefficient (TC)
)
x 106
∆TA
Temperature (°C)
0.06 mV/°C
0.002 %/°C
24 ppm/°C
Test Circuit
VIN
VKA = VREF
IREF
IK
VIN
VKA
R1
VIN
IK
VKA
IK (OFF)
(VREF)
R2
Figure 1a. Test Circuit 1
Bay Linear, Inc
Figure 1b. Test Circuit 2
2418 Armstrong Street, Livermore, CA 94506
Figure 1c. Test Circuit 3
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B431
TYPICAL PERFORMANCE CURVES
High Current Operating Characteristics
Low Current Operating Characteristics
900
150
VKA = VREF
Temperature Range: - 0 to 105 °C
800
700
100
600
500
400
105 °C
300
25 °C
200
75
IK - Cathode Current (mA)
IK - Cathode Current (µA)
V KA = V REF
Temperature Range: - 0 to 105 °C
125
50
25
0
-25
-0°C
100
-50
0
-75
-100
-100
-200
-1.0
0
1.0
2.0
-2
3.0
-1
0
2
3
Figure 3
Figure 2
Off State Leakage
Reference Voltage vs. Ambient Temperature
100
2.53
VKA = 18V
VREF = 0V
VKA = V REF
IK = 10 mA
2.52
VREF - Reference Voltage (V)
IZ off - Off State Cathode Current (nA)
1
VKA - Cathode Voltage (V)
VKA - Cathode Voltage (V)
10
1
0.1
2.51
2.50
VREF = 2.500 V at 25 °C
2.49
2.48
2.47
2.46
0.01
-60
-30
0
30
60
90
120
TA - Ambient Temperature ( °C)
Figure 4
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94506
2.45
-60
-30
0
30
60
90
120
TA - Ambient Temperature ( °C)
Figure 5
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B431
TYPICAL PERFORMANCE CURVES
Reference Input Current
VREF - Change in Reference Voltage (mV)
(
IREF - Reference Input Current µA)
R1 = 10 k Ω
R2 = ∞
IK = 10 mA
2.5
Reference Voltage Line Regulation
0
3.0
2.0
1.5
1.0
0.5
-10
0 °C
-20
25 °C
75 °C
-30
105 °C
-40
-50
0
-60
-30
0
30
60
90
120
0
3
6
9
12
15
TA - Ambient Temperature ( °C)
VKA - Cathode Voltage (V)
Figure 6
Figure 7
18
Low Frequency Dynamic Output Impedance
Noise Voltage
0.150
70
VKA = VREF
IKA = 1 to 100 mA
f < 1 kHz
60
ZKA - Dynamic Impedance (Ω )
0.125
Noise Voltage nV/√Hz
50
40
30
20
0.100
0.075
0.050
0.025
10
V KA = V REF
IK = 10 mA
TA = 25°C
0.0
0
-60
10
100
1k
10 k
100 k
f - Frequency (Hz)
Figure 8
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94506
-30
0
30
60
90
120
TA - Free Air Temperature
Figure 9
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B431
TYPICAL PERFORMANCE CURVES
Dynamic Output Impedance
100
ZKA - Dynamic Impedance
TA = 25 °C
IK = 1 to 100 mA
10
1.0
0.1
0.01
1k
10 k
100 k
10 M
1M
f - Frequency (Hz)
Figure 10
Small Signal Voltage Gain vs. Frequency
70
Temperature Range: -0 to 105 °C
AV - Small Signal Voltage Gain (dB)
60
IK = 10 mA
50
OUT
40
15 k
IK
230 Ω
9 µF
30
8.25 k
20
GND
10
0
1k
10 k
100 k
f - Frequency (Hz)
Bay Linear, Inc
1M
10 M
Figure 11
2418 Armstrong Street, Livermore, CA 94506
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B431
TYPICAL PERFORMANCE CURVES
Pulse Response
6
INPUT
Input and Output Voltages (V)
5
INPUT
MONITOR
220 Ω
OUT
4
3
OUTPUT
50 Ω
fP = 100 kHz
2
1
GND
0
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
t - Time (µs)
Figure 12
Stability Boundary Conditions
100
A:
B:
C:
D:
90
V KA = V REF
V KA = 5V at I K = 10 mA
V KA = 10V at I K = 10 mA
V KA= 15V at I K = 10 mA
80
IK - Cathode Current (mA)
70
C
150 Ω
60
IK
50
40
STABILITY
REGION
CL
30
A
20
TA = 25 °C
10
10 k
B
D
0
10 0
10 1
10 2
10 3
10 4
10 5
10 6
CL - Load Capacitance (pF)
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94506
107
Figure 13
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B431
TO-92
0.090 (2.286) Radius typ.
2
1
3
0.145 (3.683)
0.135 (3.429)
0.055 (1.397)
0.045 (1.143)
10° typ.
BOTTOM VIEW
0.085 (2.159) Diameter
0.185 (4.699)
0.045 (1.143)
5° typ.
0.185 (4.699)
0.175 (4.445)
0.090 (2.286) typ.
5° typ.
Seating Plane
0.025 (0.635) Max
Uncontrolled
Lead Diameter
0.500 (12.70) Min.
0.016 (0.406)
0.014 (0.356)
0.0155 (0.3937)
0.0145 (0.3683)
0.055 (1.397)
0.045 (1.143)
0.105 (2.667)
0.095 (2.413)
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94506
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B431
SOT-89
C
A
J
N
P
2
1
3
K
B
F
D
G
-T-
rr
STYLE 1
PIN 1. BASE
2. COLLECTOR
3. EMITTER
STYLE 3
PIN 1. GATE
2. ANODE
3. CATHODE
STYLE 2
PIN 1. ANODE
2. CATHODE
3. NO CONNECTION
STYLE 4
PIN 1. DRAIN
2. GATE
3. SOURCE
DIM
A
B
C
D
E
F
G
J
K
L
N
P
MILLIMETERS
MIN
MAX
4.40
4.60
2.29
2.60
140
160
0.36
0.48
1.62
1.80
0.44
0.53
150 BSC
0.35
0.44
0.80
1.04
300 BSC
2.04
2.28
3.94
4.25
INCHES
MIN
MAX
0.174
0.181
0.091
0.102
0.056
0.062
0.015
0.018
0.064
0.070
0.018
0.020
0.059 BSC
0.014
0.017
0.032
0.040
0.118 BSC
0.081
0.089
0.156
0.167
Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations,
computer simulations and/ or initial prototype evaluation.
Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are
subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges.
The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit
design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any
industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different
applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application.
LIFE SUPPORT AND NUCLEAR POLICY
Bay Linear products are not authorized for and should not be used within life support systems which are intended for
surgical implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility
applications without the specific written consent of Bay Linear President.
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94506
Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
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