參數(shù)資料
型號: LX1660CD-TR
廠商: MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP
元件分類: 穩(wěn)壓器
英文描述: 1.5 A SWITCHING CONTROLLER, PDSO16
封裝: LEAD FREE, PLASTIC, SOIC-16
文件頁數(shù): 1/15頁
文件大?。?/td> 376K
代理商: LX1660CD-TR
P RODU C T ION D AT A S HEET
T HE
I NFI N ITE
P O W ER
OF
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N
No
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Re
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om
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d F
Fo
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Ne
ew
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L IN F IN IT Y M IC ROEL E C TRON IC S I NC .
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
Copyright
1998
Rev. 1.1a,2005-03-09
LX1660 / 1661
A DV A NC E D PWM C ONTRO L LER
DESCRI PTI O N
The LX1660 and LX1661 Are Monolithic
Switching Regulator Controller ICs designed to
provide low-cost, high performance adjustable
power supply for microprocessors and other
applications requiring a fast transient response and
a high degree of accuracy. They provide an
adjustable synchronous Pulse Width Modulator
output suitable for a power supply for Pentium or
other microprocessors.
Synchronous Rectifier Driver For CPU Core.
The devices can drive dual MOSFETs resulting in
typical efficiencies of 85 - 90%, even with loads in
excess of 10A. Synchronous shutdown results in
increased efficiency in light load applications.
Short-Circuit
Current
Limiting
Without
Expensive
Current
Sense
Resistors.
The
current sensing mechanism can use a PCB trace
resistance or the parasitic resistance of the main
inductor. For applications requiring a high degree
of accuracy, a conventional sense resistor can be
used.
Hiccup Mode Fault Protection. The hiccup
mode is programmable and with pulse-by-pulse
current limiting will help protect the power
supply system and load in the even of a short
circuit.
Ultra-Fast
Transient
Response
Reduces
System Cost. The fixed frequency modulated
off-time
architecture
results
in
the
fastest
transient response for a given inductor. Adaptive
voltage positioning (LX1661 only) requires fewer
low-ESR capacitors to meet stringent transient
over and under-shoot specifications.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATUR ES
Designed To Drive A
Synchronous Rectifier Stage —
Can Also Be Used In Non-
Synchronous Applications
Soft-Start Capability
Hiccup-Mode Fault Protection
No Current-Sense Resistor
Required For Current Limiting
Modulated Constant Off-Time
Control Mechanism For Fast
Transient Response And Simple
System Design
2V, 0.5% Internal Voltage
Reference Brought Out
APPLI CATI ONS
Pentium Processor Supplies
AMD-K6TM Supplies
Cyrix 6x86TM Supplies
Voltage Regulator Modules
General Purpose DC:DC
Supplies
PRODUCT H I GHLIGHT
LX1661 IN SOCKET 7
PROCESSOR SUPPLY
APPLICATION
EN
C
T
C8
390pF
TDRV
V
CC
CS-
OT
ADJ
SGND
V
REF
INV
NINV
HICCUP
CS+
SYNCEN
BDRV
PGND
V
C1
LX1661
R16
10k
C3
0.1F
C4
390pF
R15
2.0k
1%
R14, 1%
See Table 5
C9
1F
12V
L1
R1, 5m
16V, 1000F
Sanyo MV-GX or
equivalent
V
OUT
16V, 1000F
Sanyo MV-GX or equivalent
V
IN 5V
16-pin SOIC
C1
390pF
Q1
IRL3103
5H Toroid
D1
C5
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
C2
C7
C6
OUTEN
U1
R5, 1k
R6, 1k
PACKAGE ORDER I NFO
N
Plastic DIP
16-Pin
D
Plastic SOIC
16-Pin
TA (
°C)
RoHS Compliant / Pb-free
Transition DC: 0503
RoHS Compliant / Pb-free
Transition DC: 0440
0 to 70
LX166xCN
LX166xCD
Note: Available in Tape & Reel. Append the letters “TR” to the part number.
(i.e. :LX1661CD-TR)
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LX1671-CLQTR 1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PQCC38
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