B432 [ETC]
1.25V Adjustable Shunt Regulator; 1.25V可调并联稳压器
| 型号： | B432 |
| 厂家： | 
ETC |
| 描述： | 1.25V Adjustable Shunt Regulator |
| 文件： | 总5页 (文件大小：113K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Bay Linear
Inspire the Linear Power
1.25V Adjustable Shunt Regulator
B432
Description
Features
The B432 is a three terminal adjustable shunt regulator with
thermal stability of 50ppm/°C. The output voltage can be
adjusted to any value from 1.25V (VREF) to 15V with two
external resistors. The B432 is an ideal voltage reference in an
isolated feedback circuit for 3.0V switch mode power supplies
•
•
•
•
Low voltage operation (down to 1.25V)
Wide operating current….1mA to 100mA
Trimmed bandgap design ± 0.5%
Wide temperature range 0°C to +105°C
•
•
Available in SOT-23-3, TO-92 , 8SOIC
Upgrade for TLV431A & Cross AS432
The B432 shunt regulator is available with three voltage
tolerances (0.5%, 1.0% and 2.0%) and three package options
(SOT-23-3, TO-92, 8SOIC). This allows the designer the
opportunity to select the optimum combination of cost and
performance for their application.
Applications
•
•
•
•
•
•
Switching Power Supplies
Adjustable Power Supplies
Linear Regulators
Battery Powered Equipment
Monitors, TV, VCR
Instrumentation
Pin Connection
Ordering Information
Package
Tolerance
1%
B432BZ
B432BM
B432BK3
0.5%
2%
TO-92
SO-8
SOT-23 B432AK3
B432AZ
B432AM
B432CZ
B432CM
B432CK3
SOT-23-3 (K3)
TO-92 (Z)
Anode
2
1
3
BAY
Ref
Cathode
Ref
Cathode
Anode
Top View
Bottom View
Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B432
Absolute Maximum Rating
Parameter
Symbol
Maximum
Units
V
Cathode Voltage
Vz
Iz
18
100
Continuous Cathode Current
Power Dissipation at TA - 25°C
SOT-23-3
mA
PD
200
750
775
mW
S0-8
TO-92
Thermal Resistance
SOT-23-3
OJA
575
175
°C/W
S0-8
TO-92
160
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 seconds
ESD Rating (Human Body Model)
TJ
-40 to +150
-65 to +150
300
°C
°C
°C
kV
TSTG
TLEAD
TESD
2
Recommended Operating Conditions
Min
VREF
1.0
Max Symbol
Cathode Voltage, Vz
Cathode Current, Iz
15
V
100
mA
Electrical Characteristics
Unless specified: T
٨
= 25°C. Values in bold apply over full operating ambient temperature. B432 0.5%
Parameter
Reference Voltage
Symbol
VREF
Condition
Min
1.243
Typ
1.250
Max
1.257
Units
V
VZ = VREF1 IZ = 10mA(1)
VREF Temp Deviation VDEV
VZ = VREF1 IZ = 10mA(1)
2
16
mV
Ratio of Change in
Δ VREF
IZ = 10mA,ΔVZ = 15V to VRef
-1.5
-2.7
mV/V
VREF To Change in VZ
ΔVZ
Reference Input
Current
IREF
3
6
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
µA
µA
IREF Temperature
Deviation
IREF(DEV)
IZ (OFF)
0.3
0.6
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
Off-State Cathode
Current
nA
VREF = 0V, VZ =15V(3)
0.05
0.6
500
1
(1)
Min Operating
Current
IZ(MIN)
VZ = VREF
mA
Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B432
Electrical Characteristics
Unless specified: T
٨
= 25°C. Values in bold apply over full operating ambient temperature. B432 1%
Parameter
Reference Voltage
Symbol
VREF
Condition
Min
1.237
Typ
1.250
Max
1.262
Units
V
VZ = VREF1 IZ = 10mA(1)
VREF Temp Deviation VDEV
VZ = VREF1 IZ = 10mA(1)
2
16
mV
Ratio of Change in
Δ VREF
IZ = 10mA,ΔVZ = 15V to VRef
-1.5
-2.7
mV/V
VREF To Change in VZ
ΔVZ
Reference Input
Current
IREF
3
6
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
µA
µA
IREF Temperature
Deviation
IREF(DEV)
IZ (OFF)
0.3
0.6
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
Off-State Cathode
Current
nA
VREF = 0V, VZ =15V(3)
0.05
0.6
500
1
(1)
Min Operating
Current
IZ(MIN)
VZ = VREF
mA
Unless specified: T
٨
= 25°C. Values in bold apply over full operating ambient temperature. B432 2%
Parameter
Reference Voltage
Symbol
VREF
Condition
Min
1.225
Typ
1.250
Max
1.275
Units
V
VZ = VREF1 IZ = 10mA(1)
VREF Temp Deviation VDEV
VZ = VREF1 IZ = 10mA(1)
2
16
mV
Ratio of Change in
Δ VREF
IZ = 10mA,ΔVZ = 15V to VRef
-1.5
-2.7
mV/V
VREF To Change in VZ
ΔVZ
Reference Input
Current
IREF
3
6
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
µA
µA
IREF Temperature
Deviation
IREF(DEV)
IZ (OFF)
0.3
0.6
R1 = 10kΩ, R2 = ∞,
IZ = 10mA(2)
Off-State Cathode
Current
nA
VREF = 0V, VZ =15V(3)
0.05
0.6
500
1
(1)
Min Operating
Current
IZ(MIN)
VZ = VREF
mA
Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B432
VREF
Vin
Vin
Vout
10nf
10nf
I (OFF)
IK
R1 Iref
R
2
VREF
Test Circuit for VKA > VREF
Test Circuit for IOFF
VO = VKA = VREF x (1 + R1/R2) - IREF x R1
+3.3V
0.1µF
470µF
PHD 3055E
+12V
500Ω
2.7V
Ω
140
0.1µF
0.1µF
0.1µF
INTEL
I 740
B431L
1000µF
Ω
120
*If the output voltage has noise, then please add a 0.1µF in between drain and gate of power MOSFET to
reduce the noise.
Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B432
SOT-23
0.015 - 0.018
(0.381 - 0.457)
0.047 - 0.055 0.083 - 0.098
(1.194 - 1.397) (2.108 - 2.489)
0.035 - 0.040
(0.889 - 1.016)
0.020 - 0.024
0.070 - 0.080
(0.508 - 0.610)
(1.778 - 2.032)
0.110 - 0.120
0.003 - 0.005
(2.794 - 3.048)
(0.076 - 0.127)
0.030 - 0.041
(0.762 - 1.041)
0.018 - 0.024
(0.457 - 0.610)
0.001 - 0.004
(0.025 - 0.102)
- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations,
Advance Information
computer simulations and/ or initial prototype evaluation.
- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are
Preliminary Information
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 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
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