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CD43-470 Folha de dados(PDF) 2 Page - Microsemi Corporation

Nome de Peças CD43-470
Descrição Electrónicos  1.0MHz Inverting DC/DC Converter
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Fabricante Electrônico  MICROSEMI [Microsemi Corporation]
Página de início  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

CD43-470 Folha de dados(HTML) 2 Page - Microsemi Corporation

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Microsemi
Microsemi Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright
© 2002
Rev. 3.0a, 2005-03-14
LX1734
1.0MHz Inverting DC/DC Converter
TM
®
ABSOLUTE MAXI MUM RATI NGS
Supply Voltage (VIN), Shutdown (SD ).................................................... 0 to 10V
SW Voltage....................................................................................... -0.4V to 20V
NFB Voltage.................................................................................................... -2V
Current Into NFB Pin................................................................................... ±1mA
Operating Temperature Range ............................................................0°C to 85°C
Maximum Junction Temperature ................................................................. 125°C
Storage Temperature......................................................................-65°C to 150°C
Peak Package Solder Reflow Temperature
(40 second maximum exposure) ..................................................... 260°C (+0, -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into, negative out of specified terminal
.
TH ERM A L DATA
LM
Plastic LM 6-Pin
THERMAL RESISTANCE
-JUNCTION TO AMBIENT,
θJC
8
°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJC).
The θJC numbers are guidelines for the thermal performance of the device/pc-board
system. All of the above assume no ambient airflow.
PACKAGE PIN OUT
SW
GND
NFB
SD
V
IN
N/C*
**
LM PACKAGE
(Top View)
* Not Internally Connected.
** Package heatsink should
be connected to ground or
left floating.
RoHS / Pb-free 100% Matte Tin Lead Finish
FUNCTIONAL PIN DESCRIPTION
NAME
DESCRIPTION
SW
Power Switch Pin
GND
Common ground reference
NFB
Feedback Pin - Connect to a resistive divider in order to set the output voltage. Feedback threshold is -1.235V.
Given the typical NFB bias current (INFB) of 4µA flows out of the pin, the suggested value for R2 is 10K. Given
R2, set R1 according to:
()
NFB
I
R
VOUT
R
+
=
2
235
.
1
235
.
1
1
VIN
Input Supply – Input pin must be locally bypassed.
SD
Shutdown, Connected to >2V, device is active.


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