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参数资料
| 型号： | LX1734-CLM |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.7 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 3 X 3 MM, EXPOSED PAD, PLASTIC, MO-229, 6 PIN |
| 文件页数： | 1/8页 |
| 文件大小： | 271K |
| 代理商： | LX1734-CLM |
Microsemi
Microsemi Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2002
Rev. 3.0, 2002-09-23
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LX1734
1.0MHz Inverting DC/DC Converter
I N T E GRA T ED
PR ODU C T S
DESCRIPTION
The LX1734 is an inverting
DC/DC current-mode controller. With
a 750mA integrated switch, the
LX1734 can generate large output
currents in a small footprint.
The
LX1734 minimizes external com-
ponent size and cost by implementing
a
high
switching
frequency
of
1.0MHz, while generating -5V at
250mA.
When configured in the dual
inductor inverting topology very low
output voltage ripple approaching
1mVP-P can be achieved when used in
conjunction
with
ceramic
output
capacitors. The dual inductor can be
implemented as a coupled or separate
cores.
Fixed frequency operation ensures a
clean output free from low frequency
noise typically present with charge pump
solutions. The low impedance output
remains within 1% of nominal during
large load steps. The 18V switch allows
high voltage outputs to be generated.
The LX1734 is available in the space
saving
6-lead
3x3
Jedec
MO-229
package, which has the same footprint
and lead spacing as the SOT-23A. A
complete inverter function utilizes less
than 0.32 inches of PCB space.
IMPORTANT:
For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEA T URES
Fixed Frequency 1.0MHz
Operation
Very Low Noise: 1mVP-P Output
Ripple Possible With Cuk
Topology
Stable Operation With Ceramic or
Tantalum Capacitors
-5V at 250mA from 5V Input
Uses Small Surface Mount L/C
Components
Wide Input Range: 4.2V to 8V
Low VCESAT Switch: 600mV at
600mA
6-Lead 3x3mm JEDEC MO-229
Package
Functionally Compatible with
LT1611 or LT1931
APPLICATIONS/BENEFITS
Disk Drive MR Head Bias
Digital Camera CCD Bias
LCD Bias
GaAs FET Bias
Local -5V or -12V Supplies
PRODUCT HIGHL IG HT
C1
10
F
V
IN = 5V
LX1734
V
IN
SW
L1A
22
H
GND
NFB
C2
1
F
R2
10k
R1
29.4k
L1B
22
H
C3
22
F
V
OUT = -5V
@ 150mA
C4
1000pF
Note: L1A and L1B are shown as coupled. Individual inductors can also be used.
C1, C2, C3 are ceramic capacitors
SD
Figure 1
PACKAGE ORDER INFO
TA (°C)
LM
Plastic MO-229
6-Pin
0 to 85
LX1734-CLM
Note: Available in Tape & Reel.
Append the letter “T” to the part number. (i.e. LX1734-CLMT)
LL
XX
11
77
33
44
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