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| 型号： | LX1665CDW-TR |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO18 |
| 封装： | ROHS COMPLIANT, PLASTIC, SOIC-18 |
| 文件页数： | 1/17页 |
| 文件大小： | 395K |
| 代理商： | LX1665CDW-TR |
P RODU C T ION D AT A S HEET
T HE
I NFI N ITE
P O W ER
OF
I N NOVATIO N
Not Recommended For New Design
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
1999
Rev. 1.3a,2005-03-17
LX1664 / 64A, LX1665 / 65A
DUAL OUTPUT PWM CONTROLLER WITH 5-BIT DAC
DESCRI PTI O N
The LX1664/64A and LX1665/65A are
monolithic switching regulator controller
IC’s designed to provide a low cost, high
performance adjustable power supply for
advanced microprocessors and other
applications requiring a very fast transient
response and a high degree of accuracy.
Short-circuit Current Limiting without
Expensive Current Sense Resistors.
Current-sensing mechanism can use PCB
trace resistance or the parasitic resistance of
the main inductor. The LX1664A and
LX1665A have reduced current sense
comparator threshold for optimum
performance using a sense resistor. For
applications requiring a high degree of
accuracy, a conventional sense resistor can be
used to sense current.
Programmable Synchronous Rectifier
Driver for CPU Core. The main output is
adjustable from 1.3V to 3.5V using a 5-bit
code. The IC can read a VID signal set by
a DIP switch on the motherboard, or
hardwired into the processor’s package (as
in the case of Pentium
Pro and Pentium II
processors). The 5-bit code adjusts the
output voltage between 1.30 and 2.05V in
50mV increments and between 2.0 and 3.5V
in 100mV increments, conforming to the
Intel Corporation specification. The device
can drive dual MOSFET’s resulting in
typical efficiencies of 85 - 90% even with
loads in excess of 10 amperes. For cost
sensitive applications, the bottom MOSFET
can be replaced with a Schottky diode (non-
synchronous operation).
Linear Regulator Driver. The LX1664/ 65
family of devices have a secondary regulator
output. This can drive a MOSFET or bipolar
transistor as a pass element to construct a
low-cost adjustable linear regulator suitable
for powering a 1.5V GTL+ bus or 2.5V
clock supply.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATUR ES
5-bit Programmable Output For
CPU Core Supply
Adjustable Linear Regulator
Driver Output
No Sense Resistor Required For
Short-Circuit Current Limiting
Designed To Drive Either
Synchronous Or Non-
Synchronous Output Stages
Soft-Start Capability
Modulated, Constant Off-Time
Architecture For Fast Transient
Response And Simple System
Design
Available Over-Voltage
Protection (OVP) Crowbar Driver
And Power Good Flag (LX1665
only)
APPLI CATI ONS
Socket 7 (Pentium Class)
Microprocessor Supplies
(including Intel Pentium
Processor, AMD-K6TM And
Cyrix 6x86TM, Gx86TM and
M2TM Processors)
Pentium II and Deschutes
Processor & L2-Cache Supplies
Voltage Regulator Modules
PRODUCT H I GHLIGHT
LX1665 in a Pentium II Single-Chip Power Supply Solution
SS
TDRV
V
CC
INV
V
CC_CORE
VID0
VID1
VID2
VID3
OV
C
T
BDRV
GND
V
C1
U1
LX1665
VID3
C
5
1F
12V
R
1
V
OUT
5V
18-pin
Wide-Body SOIC
Q
1
IRL3102
2.5H
6.3V, 1500F x 3**
14
13
12
11
10
1
2
3
4
5
6
7
C
8
680pF
VID2
VID1
VID0
VID4
C
3
0.1F
0.0025
Supply Voltage
for CPU Core
6.3V
1500F x3
** Three capacitors for Pentium
Four capacitors for Pentium II
VID4
L
DRV
Supply Voltage
For I/O Chipset or GTL+ Bus
8
16
15
L
FB
PWRGD
9
PWRGD
OV
17
18
Q
2
IRL3303
Q
4
IRLZ44
C
7
330F
R
5
R
6
L
1
C
2
C
1
C
9
330F
F
1 20A
L
2
1H
PACKAGE ORDER INFO
N
Plastic DIP
16-Pin
N
Plastic DIP
18-Pin
D
Plastic SOIC
16-Pin
DW
Plastic SOIC Wide
18-Pin
TA (
°C)
RoHS Compliant / Pb-free
Transition DC: 0503
RoHS Compliant / Pb-free
Transition DC: 0440
RoHS Compliant / Pb-free
Transition DC: 0516
LX1664CN
LX1665CN
LX1664CD
LX1665CDW
0 to 70
LX1664ACN
LX1665ACN
LX1664ACD
LX1665ACDW
Note: Available in Tape & Reel. Append the letters ‘TR’ to the part number. (i.e. LX1664CD-TR)
相关PDF资料 |
PDF描述 |
|---|---|
| LX1665CDWT | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO18 |
| LX1665CDW | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO18 |
| LX1665ACDW | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO18 |
| LX1665ACDWT | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO18 |
| LX1664ACD | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LX1665CN | 功能描述:IC PWM DUAL OUT 5BIT DAC 18DIP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| LX1668 | 制造商:MICROSEMI 制造商全称:Microsemi Corporation 功能描述:PROGRAMMABLE MULTIPLE OUTPUT DC:DC CONTROLLER |
| LX1668CDW | 功能描述:IC CTRLR DC/DC PROG SW 20SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| LX1668CDWT | 制造商:MICROSEMI 制造商全称:Microsemi Corporation 功能描述:Analog IC |
| LX1668CPW | 功能描述:IC CTRLR DC/DC PROG SW 20TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
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