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参数资料
| 型号： | LX1675ILQ-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, 690 kHz SWITCHING FREQ-MAX, PQCC38 |
| 封装： | 5 X 7 MM, ROHS COMPLIANT, PLASTIC, MLPQ-38 |
| 文件页数： | 1/19页 |
| 文件大小： | 324K |
| 代理商： | LX1675ILQ-TR |
LX1675
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2004
Rev. 1.2a, 2006-02-16
WWW
.Microse
m
i
.CO
M
Multiple Output LoadSHARE PWM
TM
DESCRIPTION
The LX1675 is a highly integrated
power supply controller IC featuring
three voltage mode PWM switching
regulator
stages
with
an
additional
onboard linear regulator driver.
Two of the constant frequency PWM
phases can be easily configured for a
single Bi-Phase high current output or
operated as two independently regulated
outputs. All outputs (PWM phases and
LDO) have separate, programmable soft-
start sequencing. This versatility yields
either
three
or
four
independently
regulated
outputs
with
full
power
sequencing
capability
giving
system
designers the ultimate flexibility in power
supply design.
Current limit for each PWM regulator
is provided by monitoring the voltage
drop across the lower MOSFET power
stage during conduction, utilizing the
Rds(on) impedance. This eliminates the
need
for
expensive
current
sense
resistors.
Once current limit has been
reached and persist for 4 clock cycles, the
output is shut off and Soft Start is
initialized to force a hiccup mode for
protection.
High current MOSFETs can be directly
driven to provide an LDO output of 5A
and 15A for each PWM controller. This
is useful for I/O, memory, termination,
and other supplies surrounding today’s
micro-processor based designs.
The LX1675 accepts a wide range of
supply voltage ranging from 4.5V to 24V.
Each PWM regulator output voltage is
programmed via a simple voltage-divider
network.
The LX1675 design gives
engineers
maximum
flexibility
with
respect to the MOSFET supply.
Each
phase can utilize different supply voltages
for efficient use of available supply rails.
Additionally, when two phases are
configured
in
Bi-Phase
output,
the
LoadSHARE
topology
can
be
programmed via inductor ESR selection.
The split phase operation reduces power
loss, noise due to the ESR of the input
capacitors and allows for reduction in
capacitance
values
while
maximizing
regulator response time.
The internal
reference voltage is buffered and brought
out on a separate pin to be used as an
external reference voltage.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
LoadSHARE is a Trademark of Microsemi Corporation
Protected by U.S. Patents 6,285,571 and 6,292,378
KEY FEATUR ES
Four Independently Regulated
Outputs
Single Input Supply with Wide
Voltage Range: 4.5-24V
Outputs As Low As 0.8V
Generated From a Precision
Internal Reference
Selectable PWM Frequency of
300KHz or 600KHz
Buffered Reference Voltage
Output
Multiphase Output Reduces
Need for Large Input
Capacitance at High Currents
Integrated High Current
MOSFET Drivers
Independent Soft-Start and
Power Sequencing
Adjustable Linear Regulator
Driver Output
No Current-Sense Resistors
DDR Termination Compliant
RoHS Compliant for Pb Free
APPLI C ATION S
Multi-Output Power Supplies
Video Card Power Supplies
PC Peripherals
Portable PC Processor and I/O
Supply
PRODUCT H I GHLIGHT
HOX
5h
VIN
VOUT1, 2, 3
FBX
EOX
VIN 4.5V to 24V
VCCL
ONE OF 3 PWM SECTIONS
LX1675
VOUT4
CSX
VCX
HRX
LOX
SSX
VSLR
PGX
AGND
LDGD
LDFB
PACKAGE ORDER INFO
LQ
Plastic MLPQ
38-Pin
TA (°C)
RoHS Compliant / Pb-free
0 to 85
LX1675CLQ
-40 to 85
LX1675ILQ
Note: Available in Tape & Reel. Append the
letters “TR” to the part number. (i.e.
LX1675CLQ-TR)
LL
XX
11
66
77
55
相关PDF资料 |
PDF描述 |
|---|---|
| LX1675CLQ-TR | 1.5 A SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PQCC38 |
| LX1684CDT | 1 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO14 |
| LX1689CPW-TR | FLUORESCENT LIGHT CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO20 |
| LX1689IPW-TR | FLUORESCENT LIGHT CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO20 |
| LX1691IPWTR | 0.1 A FLUORESCENT LIGHT CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LX1676 | 制造商:MICROSEMI 制造商全称:Microsemi Corporation 功能描述:Mobile AMD Athlon? VRM Controller |
| LX1676 EVAL KIT | 制造商:Microsemi Corporation 功能描述:PWM CONTROLLERS - Bulk |
| LX1676_05 | 制造商:MICROSEMI 制造商全称:Microsemi Corporation 功能描述:Mobile AMD Athlon? VRM Controller |
| LX1676CLQ | 功能描述:IC CTRLR PS VRM BIPHASE 38MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:2,000 系列:- 应用:控制器，DSP 输入电压:4.5 V ~ 25 V 输出数:2 输出电压:最低可调至 1.2V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:30-TFSOP（0.173"，4.40mm 宽） 供应商设备封装:30-TSSOP 包装:带卷 (TR) |
| LX1676-CLQ | 制造商:MICROSEMI 制造商全称:Microsemi Corporation 功能描述:Mobile AMD AthlonTM VRM Controller |
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