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PDF LX6431B Data sheet ( Hoja de datos )

Número de pieza LX6431B
Descripción PRECISION PROGRAMMABLE REFERENCES
Fabricantes Microsemi Corporation　
Logotipo Microsemi Corporation Logotipo



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T H E I N F I N I T E P O W E R O F I N N O VAT I O N
LX6431/LX6431A/LX6431B
PRECISION PROGRAMMABLE REFERENCES
PRODUCTION DATA SHEET
DESCRIPTION
The LX6431 series precision adjustable
three terminal shunt voltage regulators are
pin-to-pin compatible with the industry
standard TL431, but with significant
improvements. The LX6431 design has
eliminated regions of instability common
to older generation shunt regulator
products like the TL431. Designs are
made simpler by eliminating the task of
insuring capacitive loads, and output
voltage and cathode currents don't
combine for unstable operation. The
capacitor value is chosen simply to give
the best load transient response without
the possibility of instability. A lower
reference input current allows the use of
higher value reference divider resistors,
reducing the current drain from batteries
in portable equipment as well as reducing
the voltage programming errors due to
the impedance of the divider network
(See Product Highlight figure below). In
addition, the LX6431B has an improved
initial accuracy of 0.4%, and the output
voltage is programmable by using two
external resistors from 2.5V to 36V.
These devices offer low output
impedance for improved load regulation.
The typical output impedance of these
devices is 100mΩ. The reduced
reference input bias current and minimum
operating currents make these devices
suitable for portable and micropower
applications.
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
KEY FEATURES
s Unconditionally Stable For All Cathode To
Anode Capacitance Values
s Reduced Reference Input Current Allowing
The Use Of Higher Value Divider Resistors
(0.5µA Max.)
s Initial Voltage Reference Accuracy Of 0.4%
(LX6431B)
s Sink Current Capability 0.6mA to 100mA
s Typical Output Dynamic Impedance Less
Than 100mΩ
s Adjustable Output Voltage From 2.5V to
36V
20
18
16
14
12
10
8
6
4
2
0
2.5
PRODUCT HIGHLIGHT
O U T P U T V O LTA G E E R R O R D U E T O I REF
TYPICAL PROGRAMMABLE VOLTAGE
REFERENCE CIRCUIT
VIN
LX6431
VKA
R1
R2
3.75 5
6.25 7.5 8.75 10 11.25
(VKA) Output Voltage - (V)
12.5
13.75
15
GND
PA C K A G E O R D E R I N F O R M AT I O N
TA (°C)
Initial
Tolerance
DM
Plastic
8-pin
SOIC
LP
Plastic
3-pin
TO-92
2% LX6431CDM
LX6431CLP
0 to 70
1%
LX6431ACDM
LX6431ACLP
0.4%
LX6431BCDM
LX6431BCLP
2% LX6431IDM
LX6431ILP
-40 to 85
1%
LX6431AIDM
LX6431AILP
0.4%
LX6431BIDM
LX6431BILP
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX5212CDPT)
TO-92 (LP) package also available in ammo-pack.
Copyright © 1999
Rev. 1.4 6/99
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1

1 page




LX6431B pdf
PRODUCT DATABOOK 1996/1997
LX6431/LX6431A/LX6431B
PRECISION PROGRAMMABLE REFERENCES
PRODUCTION DATA SHEET
CHARACTERISTIC CURVES
FIGURE 1. — REFERENCE VOLTAGE
vs. FREE-AIR TEMPERATURE
2.52
VREF = VKA
IK = 10mA
2.51
2.50
2.49
FIGURE 2. — REFERENCE CURRENT
vs. FREE-AIR TEMPERATURE
0.15
IK = 10mA
R1 = 10kW
0.14
0.13
0.12
0.11
2.48
-50
-25 0 25 50 75 100 125
(TA) Ambient Temperature - (°C)
0.1
-50
-25 0 25 50 75 100 125
(TA) Ambient Temperature - (°C)
FIGURE 3. — CATHODE CURRENT vs. CATHODE VOLTAGE
800
VKA = VREF
TA = 25°C
600
400
200
0
-200
-2
-1 0 1 2 3
(VKA) Cathode Voltage - (V)
4
FIGURE 4. — OFF-STATE CATHODE CURRENT
vs. FREE-AIR TEMPERATURE
0.8
0.7
VKA = 36V
VREF = 0
0.6
0.5
0.4
0.3
0.2
0.1
0
-50 -25 0 25 50 75 100 125
(TA) Ambient Temperature - (°C)
Copyright © 1999
Rev. 1.4 6/99
5

5 Page





LX6431B arduino
PRODUCT DATABOOK 1996/1997
LX6431/LX6431A/LX6431B
PRECISION PROGRAMMABLE REFERENCES
PRODUCTION DATA SHEET
TYPICAL CHARACTERISTICS
FIGURE 15. — PULSE RESPONSE
6
5
4
3
2
1
0
3
2
1
0
0 1 2 3 45 6
(t) Time - (µs)
220W
Pulse
Generator
f = 100kHz
50W
Output
GND
Test Circuit for Pulse Response
FIGURE 16. — DIFFERENTIAL VOLTAGE AMPLIFICATION
vs. FREQUENCY
50
Phase Shift
180
30 GM/20
10
0
-10
-30
90 +35V
R3
1K
C2
To Network
0 Analyzer as DUT
Input Port with
10X Probe
C1
R1
100K
10µF
To Network
Analyzer as
DUT Output Port
-90
10µF R2
R4
100K
2W
-180 DUT is bias at 30mA and 5V
-50
1k
10k 100k
1M
Frequency - (Hz)
Test Setup for Measuring A vs. Frequency
VD
PRODUCTION DATA - Information contained in this document is proprietary to LinFinity, and is current as of publication date. This document
may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of
all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.
Copyright © 1999
Rev. 1.4 6/99
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