Datenblatt-pdf.com


LX1431 Schematic ( PDF Datasheet ) - Microsemi Corporation

Teilenummer LX1431
Beschreibung PROGRAMMABLE REFERENCE
Hersteller Microsemi Corporation
Logo Microsemi Corporation Logo 




Gesamt 7 Seiten
LX1431 Datasheet, Funktion
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
L I N D O C #: 1431
LX1431
PROGRAMMABLE REFERENCE
PR O D U C T I O N D ATA S H E E T
DESCRIPTION
The LX1431 is an adjustable shunt voltage
regulator featuring 100mA sink capability, a
0.4% initial reference voltage tolerance and
a 0.3% typical temperature stability. This
product, which is ideal for use in Pentium®
applications, is equipped with on-chip di-
vider resistors, enabling it to be configured
as a 5V shunt regulator. In this configura-
tion, the LX1431 has an initial voltage toler-
ance of only 1% and requires no additional
external components. The Linfinity
LX1431EB evaluation board and design kit
is available to assist engineers in quickly
configuring the most efficient, cost-effective
Pentium designs.
The output voltage of the LX1431 may be
set to any value between 2.5V and 36V
through the addition of two external resis-
tors, which is of particular importance in the
design of both adjustable and switching
power supplies. In addition, the nominal
internal current limit of 100mA may be de-
creased with the addition of a single exter-
nal resistor.
For applications requiring an adjustable
reference, the Linfinity LX6431CLP, a simpli-
fied three-pin programmable reference, may
be used. Because the LX6431 is pin-for-pin
compatible with Linfinity's earlier TL431, use
of this product provides designers a simple
migration path to the more robust LX6431.
A separate LX6431 data sheet is available
which details the specifics of this product.
In addition, Pentium designers may use
Linfinity's LX8585/8585A 4.6A or LX8584/
8584A 7A Low Dropout Regulators to achieve
the most optimum motherboard configura-
tion.
KEY FEATURES
p GUARANTEED 0.4% INITIAL VOLTAGE
TOLERANCE
p 0.1TYPICAL DYNAMIC OUTPUT
IMPEDANCE
p FAST TURN-ON
p SINK CURRENT CAPABILITY, 1mA TO 100mA
p LOW REFERENCE PIN CURRENT
A P P L I C AT I O N S
s LINEAR REGULATORS
s ADJUSTABLE POWER SUPPLIES
s SWITCHING POWER SUPPLIES
s LX1431EB EVALUATION BOARD FOR
PENTIUM APPLICATIONS AVAILABLE.
CONSULT FACTORY.
PRODUCT HIGHLIGHT
THE LX8584A AND LX1431 I N 75 AND 166MHZ P54C P ROCESSOR A PPLICATIONS USING 3.3V C ACHE
32
5V VIN VOUT
LX8584A
1kW
VO 7A
(See Table Below)
3x
330µF, 6.3V
Low ESR
PLACE IN µP SOCKET CAVITY
ADJ
1
250pF
0.01µF
1kW
Oscon Type
from Sanyo
100µF x 6
10V
220µF
10V
2
3 V+
1
COL REF 8
1k
0.1%
AVX TYPE
TPS
µP
Load
Low ESR
from
Sanyo
0.1µF
50V
LX1431
SGND FGND
2.84kW
0.1%
21k
1%
JP1
1µF x 10
SMD
56
V
O
3.50
3.38
Copyright © 1997
Rev. 1.2 4/97
JP1
Short
Open
TYPICAL APPLICATION
120/166MHz, VRE, 3.3V Cache
75/90/100/133MHz, STND, 3.3V Cache
Thick traces represent high current traces which
must be low resistance / low inductance traces in
order to achieve good transient response.
PACKAGE ORDER INFORMATION
TA (°C)
M
Plastic DIP
8-pin
DM
Plastic
8-pin
SOIC
0 to 70
LX1431CM
LX1431CDM
-40 to 85
LX1431IM
LX1431IDM
Note: All surface mount packages are available in Tape & Reel.
Append the letter "T" to part number (i.e. LX1431CDMT).
FOR FURTHER INFORMATION CALL (714) 898-8121
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841
1






LX1431 Datasheet, Funktion
LX1431
PRODUCT DATABOOK 1996/1997
PROGRAMMABLE REFERENCE
PRODUCTION DATA SHEET
CHARACTERISTIC CURVES
FIGURE 1. COLLECTOR V vs. TEMPERATURE vs. CURRENT
SAT
0.6
0.5
ICOLL = 100mA
0.4
0.3
0.2 ICOLL = 50mA
0.1
0
-50
ICOLL = 20mA
ICOLL = 10mA
-25 0 25 50 75 100 125
(TA) Ambient Temperature - (°C)
FIGURE 2. COMPENSATION PIN VOLTAGE
vs. TEMPERATURE vs. I
COLL
3
2.5
2
ICOLL = 100mA
1.5
ICOLL = 10mA
1
0.5
0
-50 -25 0 25 50 75 100 125
(TA) Ambient Temperature - (°C)
FIGURE 3. I vs. TEMPERATURE WITH EXTERNAL RESISTOR
LIMIT
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6
0.5
-50
-25 0 25 50 75 100 125
(TA) Ambient Temperature - (°C)
FIGURE 4. REFERENCE VOLTAGE and
REFERENCE CURRENT vs. V+
2.505
2.504
2.503
2.502
IREF
2.501
2.50
2.499
VREF
2.498
2.497
2.496
2.495
2.5 2.7 2.9 3.1
V+ (V)
3.3
200
190
180
170
160
150
140
130
120
110
100
90
80
3.5
6 Copyright © 1997
Rev. 1.2 4/97

6 Page







SeitenGesamt 7 Seiten
PDF Download[ LX1431 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
LX1431PROGRAMMABLE REFERENCEMicrosemi Corporation
Microsemi Corporation
LX1431CDMPROGRAMMABLE REFERENCEMicrosemi Corporation
Microsemi Corporation
LX1431CMPROGRAMMABLE REFERENCEMicrosemi Corporation
Microsemi Corporation
LX1431IDMPROGRAMMABLE REFERENCEMicrosemi Corporation
Microsemi Corporation
LX1431IMPROGRAMMABLE REFERENCEMicrosemi Corporation
Microsemi Corporation

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche