Datasheet.kr   

LX1431CDM 데이터시트 PDF




Microsemi Corporation에서 제조한 전자 부품 LX1431CDM은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 LX1431CDM 자료 제공

부품번호 LX1431CDM 기능
기능 PROGRAMMABLE REFERENCE
제조업체 Microsemi Corporation
로고 Microsemi Corporation 로고


LX1431CDM 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




전체 7 페이지수

미리보기를 사용할 수 없습니다

LX1431CDM 데이터시트, 핀배열, 회로
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




LX1431CDM pdf, 반도체, 판매, 대치품
LX1431
PRODUCT DATABOOK 1996/1997
PROGRAMMABLE REFERENCE
PRODUCTION DATA SHEET
APPLICATION INFORMATION
PIN FUNCTIONS
Pin 1 COLL: Open collector of the output transistor. The
maximum pin voltage is 36V. The saturation voltage at 100mA
is approximately 1V.
Pin 2 COMP: Base of the driver for the output transistor. This
pin allows additional compensation for complex feedback
systems and shutdown of the regulator. It must be left open if
unused.
Pin 3 V+: Bias voltage for the entire shunt regulator. The
maximum input voltage is 36V and the minimum to operate is
equal to VREF (2.5V). The quiescent current is typically 0.6mA.
Pin 4 RTOP: Top of the on-chip 5k-5k resistive divider that
guarantees 1% accuracy of operation as a 5V shunt regulator
with no external trim. The pin is tied to COLL for self-
contained 5V operation. It may be left open if unused.
Pin 5 GND-S: Ground reference for the on-chip resistive
divider and shunt regulator circuitry except for the output
transistor. This pin allows external current limit of the output
transistor with one resistor between GND-F (force) and GND-S
(sense).
Pin 6 GND-F: Emitter of the output transistor and substrate
connection for the die.
Pin 7 RMID: Middle of the on-chip resistive divider string
between RTOP and GND-S. The pin is tied to REF for self-
contained 5V operation. It may be left open if unused.
Pin 8 REF: Control pin of the shunt regulator with a 2.5V
threshold.
COMP, RTOP, RMID, and REF have static discharge protection
circuits that must not be activated on a continuous basis.
Therefore, the absolute maximum DC voltage on these pins is
6V, well beyond the normal operating conditions.
As with all bipolar ICs, the LX1431 contains parasitic diodes
which must not be forward biased or else anomalous behavior
will result. Pin conditions to be avoided are RTOP below
RMID in voltage and any pin below GND-F in voltage (except
for GND-S).
FREQUENCY COMPENSATION
Excess capacitance on the REF pin can introduce enough
phase shift to induce oscillation when configured as a refer-
ence >2.5V. This can be compensated with capacitance
between COLL and REF (phase lead). More complicated
feedback loops may require shaping of the frequency response
of the LX1431 with dominant pole or pole-zero compensation.
This can be accomplished with a capacitor or series resistor
and capacitor between COLL and COMP.
The compensation schemes mentioned above use voltage
feedback to stabilize the circuits. There must be voltage gain
at the COLL pin for them to be effective, so the COLL pin must
see a reasonable AC impedance. Capacitive loading of the
COLL pin reduces the AC impedance, voltage gain, and
frequency response, thereby decreasing the effectiveness of
the compensation schemes, but also decreasing their necessity.
4 Copyright © 1997
Rev. 1.2 4/97

4페이지










LX1431CDM 전자부품, 판매, 대치품
PRODUCT DATABOOK 1996/1997
PROGRAMMABLE REFERENCE
PR O D U C T I O N D ATA S H E E T
LX1431
CHARACTERISTIC CURVES
FIGURE 5. REFERENCE VOLTAGE and
REFERENCE CURRENT vs. V+
2.502
200
2.501
2.50
190
IREF
180
2.499
170
2.498
160
2.497
150
2.496
2.495
2.494
140
VREF 130
120
2.493
110
2.492
100
2.491
2.490
0
90
80
5 10 15 20 25 30 35 40
V+ (V)
FIGURE 6. 2.5V REFERENCE IK vs. VKA
1000
900
800
700
600
500
400
300
200
100
0
0
0.5 1.0 1.5 2.0 2.5 3.0
VKA - (V)
FIGURE 6. REFERENCE VOLTAGE and
REFERENCE CURRENT vs. TEMPERATURE
2.51
1
2.505
2.5
2.495
VREF
IREF
0.8
0.6
0.4
0.2
0
2.49
-0.2
-0.4
2.485
-0.6
-0.8
2.48
-1
-50 -25 0 25 50 75 100 125
(TA) Temperature - (°C)
Copyright © 1997
Rev. 1.2 4/97
Pentium is a registered
trademark of Intel Corporation.
7

7페이지


구       성 총 7 페이지수
다운로드[ LX1431CDM.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
LX1431CDM

PROGRAMMABLE REFERENCE

Microsemi Corporation
Microsemi Corporation

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵