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参数资料
| 型号： | LX1673-09CPW-TR |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 1035 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | ROHS COMPLIANT, PLASTIC, TSSOP-20 |
| 文件页数： | 1/13页 |
| 文件大小： | 286K |
| 代理商： | LX1673-09CPW-TR |
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2004
Rev 1.0, 3/18/2005
WWW
.Microse
m
i
.CO
M
LX1673
High Frequency PWM Regulator
PRODUCTION DATA SHEET
TM
DESCRI PTI O N
The LX1673 is a highly integrated
power supply controller IC featuring one
PWM switching regulator stage with an
additional onboard linear regulator
driver.
With several switching frequencies
available (up to 900kHz) the LX1673
can be optimized for both cost and PCB
space.
Utilizing external com-
pensation, a wide selection of external
components can be chosen for use in
any application while maintaining
stable operation.
The LX1673 incorporates a fully
programmable soft-start and power
sequence capabilities. The LDO and
PWM have independent enable pins.
With onboard gate drivers, the switching
PWM output is capable of sourcing up to
15A.
The LX1673 also features an
additional Linear Regulator Controller
output, which when coupled with an
inexpensive MOSFET is capable of
supplying up to an additional 5A for I/O,
memory, and other supplies surrounding
today’s microprocessor designs.
Each regulator output voltage is
programmed via a simple voltage-divider
network.
Integrated hiccup mode current limiting
is implemented utilizing MOSFET RDS(ON)
impedance. This enables the LX1673 to
monitor maximum current limit conditions
without the use of expensive current sense
resistors.
IMPORTANT:
For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATUR ES
Two Independently Regulated
Outputs
Outputs As Low As 0.8V
Generated From An Internal 1%
Reference
Integrated High Current MOSFET
Drivers
300KHz, 600KHz, and 900KHz
High Frequency Operation
Minimizes External Component
Requirements
Soft-Start and Power Sequencing
Control
Adjustable Linear Regulator Driver
Output
No current-sense resistors
APPLICATIONS/BENEFITS
Video Card Power Supplies
PC Peripherals
Computer Add-On Cards
3.3V Power Conversion
DDR Memory Termination
PRODUCT H I GHLIGHT
LX1673
LDGD
LDFB
LDDIS
DGND
AGND
LDVCC PWGD VC1 TDRV PGND
BDRV
VCCL
VCC
VS
CS
EAO
EA-
EA+
SS
DIS
V
OUT2
+3.3V
LDDIS
DIS
PWRGD
V
OUT1
+5V
+12V
+5V
+3.3V
1
2
3
4
5
6
789
10
11
12
13
14
15
16
17
18
19
20
PACKAGE ORDER INFO
PW
Plastic TSSOP
20-Pin
LQ
Plastic MLPQ
20-Pin
TA (
°C)
Switching
Frequency (kHz)
RoHS Compliant / Pb-free
-40 to 85
300
LX1673-03CPW
LX1673-03CLQ
-40 to 85
600
LX1673-06CPW
LX1673-06CLQ
-40 to 85
900
LX1673-09CPW
LX1673-09CLQ
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1673-03CPW-TR)
LL
XX
11
66
77
33
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