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LX3005

Description
SWITCHING REGULATOR, PDSO8
CategoryPower/power management   
File Size107KB,4 Pages
ManufacturerMicrosemi
Websitehttps://www.microsemi.com
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LX3005 Overview

SWITCHING REGULATOR, PDSO8

LX3005
TM
®
2A S
TEP
-D
OWN
C
ONVERTER
P
RODUCTION
D
ATASHEET
KEY FEATURES
2A Constant Output Current
130m R
DSON
Internal Power MOSFET
Up to 94% Efficiency
Fixed 420kHz Frequency
Wide 4.75V to 25V Input Voltage Range
Output Voltage Adjustable from 0.8V to
21V
Built-in Thermal Shutdown Function
Built-in Current Limit Function
Built-in Soft-start Function
Support Ceramic or Electrolytic
Capacitors
Pb-free and RoHS Compliant
AP P LIC ATI O NS
Portable DVD
LCD Monitor/LCD TV
Digital Photo Frame
ADSL
Set-Top Box
DESCRIPTION
The LX3005 is a 420kHz fixed
frequency PWM buck (step-down) DC-DC
converter, capable of driving a 2A load
with high efficiency, low ripple and
excellent line and load regulation. The
device operates over a wide input voltage
range of 4.75V to 25V, and the output
voltage can be externally set from 0.8V to
a voltage near VIN, as the PWM control
circuit is able to adjust the duty ratio
linearly from 0% to close to 100%.
The LX3005 device integrates a
high-side low RDS
ON
PMOS for a low
cost and high efficiency solution. An
internal transconductance error amplifier
is used in the control loop allowing
flexibility to compensate the system using
an all ceramic capacitor system.
The LX3005 also features an enable
function, internal circuitry for soft start,
and protection schemes such as thermal
shutdown, over-current protection, and
short-circuit protection. When OCP or
SCP is triggered, the device operating
frequency will be reduced from typically
420kHz to typically 40kHz, limiting the
output power capability.
The LX3005 serves as an ideal power
supply device for portable devices,
especially for chipset power in portable
systems. It’s widely used for PDVD, LCD
monitor and DPF chipset power sources.
The LX3005 is available in SOIC8
package and is functional from an ambient
temperature range of 0˚C to 85˚C.
W W W.
Microsemi
.CO
M
IMPORTANT:
:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
Patents Pending
PRODUCT HIGHLIGHT
V
IN
VIN
ON OFF
EN
SW
L1
D1
FB
GND
R1
R2
C1
C
O
V
OUT
@ 2A
LX3005
C
IN
COMP
C
C
R
C
LX3005
LX3005
PACKAGE ORDER INFO
THERMAL DATA
T
A
(C)
0 to 85
DM
Plastic SOIC 8-pin
RoHS Compliant / Pb-free
J
A
= 100C/W
THERMAL RESISTANCE
-
JUNCTION TO AMBIENT
LX3005CDM
Note: Available in Tape & Reel. Append the letters “TR” to the part number.
(i.e. LX3005CDM-TR)
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
JA
).
The
JA
numbers are guidelines for the thermal performance of the
device/pc-board system. All of the above assume no ambient airflow.
Copyright
2010
Rev.1.0, 2010-02-05
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-8776458, 714-898-8121, Fax: 714-893-2570
Page 1

LX3005 Related Products

LX3005 LX3005CDM LX3005CDM-TR
Description SWITCHING REGULATOR, PDSO8 SWITCHING REGULATOR, PDSO8 SWITCHING REGULATOR, PDSO8
Maker - Microsemi Microsemi
Parts packaging code - SOIC SOIC
package instruction - ROHS COMPLIANT, PLASTIC, SOIC-8 SOP,
Contacts - 8 8
Reach Compliance Code - compli compli
ECCN code - EAR99 EAR99
Other features - ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 21V ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 21V
Analog Integrated Circuits - Other Types - SWITCHING REGULATOR SWITCHING REGULATOR
Control Technology - PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage - 25 V 25 V
Minimum input voltage - 4.75 V 4.75 V
JESD-30 code - R-PDSO-G8 R-PDSO-G8
JESD-609 code - e3 e3
Number of functions - 1 1
Number of terminals - 8 8
Maximum operating temperature - 85 °C 85 °C
Package body material - PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code - SOP SOP
Package shape - RECTANGULAR RECTANGULAR
Package form - SMALL OUTLINE SMALL OUTLINE
Certification status - Not Qualified Not Qualified
surface mount - YES YES
Switch configuration - BUCK BUCK
Maximum switching frequency - 420 kHz 420 kHz
Temperature level - OTHER OTHER
Terminal surface - MATTE TIN MATTE TIN
Terminal form - GULL WING GULL WING
Terminal location - DUAL DUAL
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