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LX1673-03CLQ Datasheet

  • LX1673-03CLQ

  • Microsemi Corporation [High Frequency PWM Regulator]

  • 286.83KB

  • MICROSEMI

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LX1673
TM
庐
High Frequency PWM Regulator
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
WWW .
Microsemi
.C
OM
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鈥檚 microprocessor designs.
Each regulator output voltage is
programmed via a simple voltage-divider
network.
Integrated hiccup mode current limiting
is implemented utilizing MOSFET R
DS(ON)
impedance. This enables the LX1673 to
monitor maximum current limit conditions
without the use of expensive current sense
resistors.
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
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
+3.3V
+5V
PWRGD
V
OUT1
+12V
+3.3V
20
1
LDGD
2
LDFB
V
OUT2
3
LDDIS
4
DGND
5
AGND
DIS
6
LDDIS
7
SS
8
EA+
EA-
9
CS
EAO
10
VS
11
VCCL
BDRV
14
13
12
+5V
19
18
17
16
15
+5V
LDVCC PWGD VC1 TDRV PGND
LX1673
VCC
DIS
LX1673
LX1673
T
A
(掳C)
-40 to 85
-40 to 85
-40 to 85
Copyright
漏
2004
Rev 1.0, 3/18/2005
PACKAGE ORDER INFO
Plastic TSSOP
Switching
PW
20-Pin
Frequency (kHz)
300
600
900
LX1673-03CPW
LX1673-06CPW
LX1673-09CPW
LQ
Plastic MLPQ
20-Pin
RoHS Compliant / Pb-free
RoHS Compliant / Pb-free
LX1673-03CLQ
LX1673-06CLQ
LX1673-09CLQ
Page 1
Note: Available in Tape & Reel. Append the letters 鈥淭R鈥?to the part number. (i.e. LX1673-03CPW-TR)
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

LX1673-03CLQ PDF文件相关型号

LX1673-03CPW

LX1673-03CLQ 产品属性

  • 3,000

  • 集成电路 (IC)

  • PMIC - 稳压器 - 线性 + 切换式

  • -

  • 降压（降压）同步（1），线性（LDO）（1）

  • 任何功能

  • 2

  • 300kHz

  • 控制器

  • 控制器

  • -

  • 无

  • 无

  • 无

  • 4.5 V ~ 5.5 V

  • -40°C ~ 85°C

  • *

  • 20-MLPQ

  • *

  • -

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