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| 型号： | LX1742CDU-TR |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PDSO8 |
| 封装： | PLASTIC, MSOP-8 |
| 文件页数： | 1/13页 |
| 文件大小： | 456K |
| 代理商： | LX1742CDU-TR |
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2000
Rev. 1.0b, 2005-03-03
WWW
.Microse
m
i
.CO
M
LX1742
High Efficiency High Voltage Boost Controller
PRODUCTION DATA SHEET
I N T E GRA T ED
PR ODUC T S
DESCRI PTI O N
The LX1742 is a compact high
efficiency step-up boost controller.
Featuring a pseudo-hysteretic pulse
frequency modulation topology, the
LX1742 was designed for maximum
efficiency, reduced board size, and
minimal cost.
Utilizing an internal N-Channel
MOSFET,
the
LX1742
offers
designers maximum flexibility with
respect to efficiency and cost. The
LX1742
provides
several
design
enhancements that improve overall
performance under very light load
currents by implementing control
circuitry that is optimized for portable
systems - thus providing a quiescent
supply current of only 80A (typ) and
a shutdown current of less than 1A.
The input voltage ranges from 1.6V to
6.0V, allowing for a wide selection of
system
battery
voltages.
Start-up
operation is guaranteed at 1.6V input
The LX1742 is capable of achieving
output voltages as high as 25V and the
output voltage is easily programmed
using
two
external
resistors
in
conjunction with the feedback pin.
The LX1742 has an additional feature
for simple dynamic adjustment of the
output voltage (i.e., up to ±15% of the
nominal output voltage).
Voltage
adjustment is achieved via an analog
reference signal or a direct PWM input
signal applied to the ADJ pin. Any
PWM
amplitude
is
easily
accommodated with a single external
resistor.
IMPORTANT:
For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATUR ES
80% Typical Efficiency
80A Typical Quiescent Supply
Current
Externally Programmable Peak
Inductor Current Limit For
Maximum Efficiency
Logic Controlled Shutdown
< 1.0 A Shutdown Current (typ)
Dynamic Output Voltage
Adjustment Via Analog
Reference Or Direct PWM Input
8-Pin MSOP Package
APPLICATIONS/BENEFITS
Pagers
Wireless Phones
PDAs
Handheld Computers
General LCD Bias Applications
LED Driver
PRODUCT H I GHLIGHT
V
BAT = (1.6V to 6.0V)
C
1
4.7F
R
1
1M
R
2
72k
R
CS
1k
L
1
47H
100kHz
V
PWM = 3.0V
V
OUT = 18V ± 15%
(For Contrast Adjustment)
LX1742
C
2 *
1nF
R
PWM
625k
UPS530
SW
SHDN
IN
OUT
GND
FB
CS
ADJ
PACKAGE ORDER INFO
DU
Plastic MSOP
8-Pin
TA (
°C)
RoHS Compliant / Pb-free
Transition DC: 0432
0 to 70
LX1742CDU
Note: Available in Tape & Reel. Append the letters “TR” to the
part number. (i.e. LX1742CDU-TR)
LL
XX
11
77
44
22
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| LX1744CLQ | 功能描述:IC LED DRVR WT/CLR BCKLGT 16MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| LX1744CPW | 功能描述:IC LED DRVR WT/CLR BCKLT 14TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
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