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Электронный компонент: B432AZ

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Bay Linear, Inc
2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com


1.25V Adjustable Shunt Regulator
B432























Pin Connection
Ordering Information






Package Tolerance
0.5%
1% 2%
TO-92 B432AZ B432BZ B432CZ
SO-8 B432AM B432BM B432CM
SOT-23 B432AK3 B432BK3 B432CK3

Description

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 (V
REF
) 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

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.
Features
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
Applications
Switching Power Supplies
Adjustable Power Supplies
Linear Regulators
Battery Powered Equipment
Monitors, TV, VCR
Instrumentation
SOT-23-3 (K3)
Top View
BAY
Cathode
Anode
Ref
Bottom View
TO-92 (Z)
1
3
2
Ref
Anode
Cathode
SOT-23-3 (K3)
Top View
BAY
Cathode
Anode
Ref
Bottom View
TO-92 (Z)
1
3
2
Ref
Anode
Cathode
Bay Linear
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Bay Linear
Inspire the Linear Power
Inspire the Linear Power
Inspire the Linear Power
Inspire the Linear Power

Bay Linear, Inc
2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B432

Absolute Maximum Rating

Recommended Operating Conditions
Min
Max
Symbol
Cathode Voltage, Vz
V
REF
15 V
Cathode Current, Iz
1.0
100
mA


Electrical Characteristics
Unless specified: T
= 25
C
. Values in bold apply over full operating ambient temperature.
B432 0.5%
Parameter Symbol
Condition Min
Typ
Max
Units
1.243 1.257
Reference Voltage
V
REF
V
Z
= V
REF1
I
Z
= 10mA
(1)
1.250
V
V
REF
Temp Deviation
V
DEV
V
Z
= V
REF1
I
Z
= 10mA
(1)
2 16
mV
Ratio of Change in
V
REF
To Change in V
Z
V
REF
V
Z
I
Z
= 10mA,V
Z
= 15V to V
Ref
-1.5 -2.7 mV/V
Reference Input
Current
I
REF
R1 = 10k
, R2 =
,
I
Z
= 10mA
(2)
3 6
A
I
REF
Temperature
Deviation
I
REF(DEV)
R1 = 10k
, R2 =
,
I
Z
= 10mA
(2)
0.3 0.6
A
Off-State Cathode
Current
I
Z (OFF)
V
REF
= 0V, V
Z
=15V
(3)
0.05 500
nA
Min Operating
Current
I
Z(MIN)
V
Z
= V
REF
(1)
0.6
1
mA
Parameter Symbol
Maximum
Units
Cathode Voltage
V
z
18 V
Continuous Cathode Current
I
z
100
mA
Power Dissipation at T
A
- 25
C
SOT-23-3
S0-8
TO-92
P
D

200
750
775
mW

Thermal Resistance
SOT-23-3
S0-8
TO-92
O
JA
575
175
160
C/W

Operating Junction Temperature Range
T
J
-40 to +150
C
Storage Temperature Range
T
STG
-65 to +150
C
Lead Temperature (Soldering) 10 seconds
T
LEAD
300
C
ESD Rating (Human Body Model)
T
ESD
2 kV

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
= 25
C
. Values in bold apply over full operating ambient temperature.
B432 1%
Parameter Symbol
Condition Min
Typ
Max
Units
1.237 1.262
Reference Voltage
V
REF
V
Z
= V
REF1
I
Z
= 10mA
(1)
1.250
V
V
REF
Temp Deviation
V
DEV
V
Z
= V
REF1
I
Z
= 10mA
(1)
2 16
mV
Ratio of Change in
V
REF
To Change in V
Z
V
REF
V
Z
I
Z
= 10mA,V
Z
= 15V to V
Ref
-1.5 -2.7 mV/V
Reference Input
Current
I
REF
R1 = 10k
, R2 =
,
I
Z
= 10mA
(2)
3 6
A
I
REF
Temperature
Deviation
I
REF(DEV)
R1 = 10k
, R2 =
,
I
Z
= 10mA
(2)
0.3 0.6
A
Off-State Cathode
Current
I
Z (OFF)
V
REF
= 0V, V
Z
=15V
(3)
0.05 500
nA
Min Operating
Current
I
Z(MIN)
V
Z
= V
REF
(1)
0.6
1
mA

Unless specified: T
= 25
C
. Values in bold apply over full operating ambient temperature.
B432 2%
Parameter Symbol
Condition Min
Typ
Max
Units
1.225 1.275
Reference Voltage
V
REF
V
Z
= V
REF1
I
Z
= 10mA
(1)
1.250
V
V
REF
Temp Deviation
V
DEV
V
Z
= V
REF1
I
Z
= 10mA
(1)
2 16
mV
Ratio of Change in
V
REF
To Change in V
Z
V
REF
V
Z
I
Z
= 10mA,V
Z
= 15V to V
Ref
-1.5 -2.7 mV/V
Reference Input
Current
I
REF
R1 = 10k
, R2 =
,
I
Z
= 10mA
(2)
3 6
A
I
REF
Temperature
Deviation
I
REF(DEV)
R1 = 10k
, R2 =
,
I
Z
= 10mA
(2)
0.3 0.6
A
Off-State Cathode
Current
I
Z (OFF)
V
REF
= 0V, V
Z
=15V
(3)
0.05 500
nA
Min Operating
Current
I
Z(MIN)
V
Z
= V
REF
(1)
0.6
1
mA

Bay Linear, Inc
2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B432

























INTEL
I 740
+3.3V
470F
0.1F
PHD 3055E
2.7V
+12V
0.1F
B431L
120
140
500
0.1F
1000F
0.1F
*If the output voltage has noise, then please add a 0.1
F in between drain and gate of power MOSFET to
reduce the noise.
V
in
V
out
I
K
R
1
I
ref
R
2
V
REF
Test Circuit for V
KA
> V
REF
V
O
= V
KA
= V
REF
x (1 + R
1
/R
2
) - I
REF
x R
1
V
in
V
REF
I
(OFF)
Test Circuit for I
OFF
10nf
10nf
V
in
V
out
I
K
I
K
R
1
I
ref
R
2
V
REF
Test Circuit for V
KA
> V
REF
V
O
= V
KA
= V
REF
x (1 + R
1
/R
2
) - I
REF
x R
1
V
O
= V
KA
= V
REF
x (1 + R
1
/R
2
) - I
REF
x R
1
V
in
V
REF
I
(OFF)
Test Circuit for I
OFF
10nf
10nf

Bay Linear, Inc
2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B432


SOT-23































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.
0.015 - 0.018
(0.381 - 0.457)
0.020 - 0.024
(0.508 - 0.610)
0.110 - 0.120
(2.794 - 3.048)
0.001 - 0.004
(0.025 - 0.102)
0.030 - 0.041
(0.762 - 1.041)
0.018 - 0.024
(0.457 - 0.610)
0.070 - 0.080
(1.778 - 2.032)
0.035 - 0.040
(0.889 - 1.016)
0.047 - 0.055
(1.194 - 1.397)
0.083 - 0.098
(2.108 - 2.489)
0.003 - 0.005
(0.076 - 0.127)