參數(shù)資料
型號： LX1736CLD-TR
廠商： MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP
元件分類： 穩(wěn)壓器
英文描述： 1.1 A SWITCHING REGULATOR, 1450 kHz SWITCHING FREQ-MAX, PDSO6
封裝： 3 X 3 MM, 0.90 MM HEIGHT, ROHS COMPLIANT, PLASTIC, MO-229, MLP-6
文件頁數(shù)： 1/7頁
文件大小： 220K
代理商： LX1736CLD-TR
LX1736
PRODUCTION DATA SHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
WWW
.Microse
m
i
.CO
M
5V 1.25A 1.0MHz PWM/PFM STEP DOWN REGULATOR
TM
Copyright
2007
Rev. 1.1., 11/25/2008
DESCRIPTION
The LX1736 operates as a Current
Mode
PWM
Buck
regulator
that
switches to PFM mode under light
loads. The entire regulator function is
implemented with only a few, low-
cost external components.
The LX1736 responds quickly to
dynamic load changes using a high
bandwidth error amplifier and internal
compensation.
Tight output voltage
regulation is maintained with the
temperature
compensated
800mV,
bandgap reference achieving +/-3.5%
regulation tolerance for all line, load
and thermal conditions.
The output
voltage is easily programmed, from
800mV to 90% of VIN with two
external resistors
The regulator is capable of providing an
output load current up to 1.25A and has
no minimum load current requirement
for stable operation.
Current limit
senses on a cycle-by cycle basis to
protect the switch.
Power conversion
efficiency is maximized with PFM
mode of operation and low regulator
quiescent current.
The LX1736 operational supply voltage
range covers 4.0V to 6.0V, features
include: power on delay; soft start to
limit
inrush
currents
and
thermal
shutdown during fault conditions.
The 6-pin JEDEC MO-229 package
provides a small form factor and low
profile at 3x3x1mm with excellent
power dissipation capability on surface
mount PCB’s.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEA T URES
Few External Components
800mv Internal Reference
Tight Regulation over Line,
Load and Temperature
4.5V to 5.5V Input Range
Internal Soft Start Controls
Inrush Current
High Efficiency
Low Quiescent Current, 600μA
Fully Fault Protected
Thin MO-229, 6-Pin Package
A P P L IC A T IO N S
Point of Load Regulation
DSP, ASIC and Core Voltage
Supplies
Hard Disk Drives
Set Top Boxes
RoHS compliant product
PRODUCT HIGHLIG HT
Figure 1 –
LX1736 Application Circuit and Typical Efficiency Performance
Efficiency @ VIN=5V,
VO=1.25V (Lower)
VO=3.3V (Upper)
25%
35%
45%
55%
65%
75%
85%
95%
1
10
100
1000
OUTPUT CURRENT, mA
PACKAGE ORDER INFO
LD
Plastic MLPD
6 pin 3mm x 3mm
TA (°C)
RoHS Compliant / Pb-free
0 to 125
LX1736CLD
Note: Available in Tape & Reel. Append the letters “TR” to
the part number. (i.e. LX1736CLD-TR)
Package Marking
MSC
xxxx
3049
LL
XX
11
77
33
66
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