LX6431CLP 반도체 회로 부품 판매점
PRECISION PROGRAMMABLE REFERENCES
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 Microsemi Corporation |
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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
PRODUCT DATABOOK 1996/1997
LX6431/LX6431A/LX6431B
PRECISION PROGRAMMABLE REFERENCES
PRODUCTION DATA SHEET
A B S O L U T E M A X I M U M R AT I N G S (Note 1)
Cathode to Anode Voltage (VKA) ................................................................... -0.3V to 37V
Reference Input Current (IREF) .................................................................... -50µA to 10µA
Continuous Cathode Current (IK) ......................................................... -100mA to 150mA
Operating Junction Temperature
Plastic (DM & LP Packages) ................................................................................. 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature ..................................................................................................... 300°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. Pin
numbers refer to DIL packages only.
THERMAL DATA
DM PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
LP PACKAGE:
165°C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
156°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system.
All of the above assume no ambient airflow
BLOCK DIAGRAM
Cathode (K)
PACKAGE PIN OUTS
CATHODE
N.C.
ANODE
N.C.
18
27
36
45
REF
ANODE
ANODE
N.C.
DM PACKAGE
(Top View)
1. CATHODE
2. ANODE
3. REF
LP PACKAGE
(Top View)
Ref (R)
VREF
Anode (A)
2 Copyright © 1999
Rev. 1.4 6/99
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