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参数资料
| 型号： | LX1734-CSET |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 1400 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封装： | PLASTIC, SOT-23, 5 PIN |
| 文件页数： | 2/4页 |
| 文件大小： | 66K |
| 代理商： | LX1734-CSET |
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright
2000
Rev. 0.2, 2001-02-15
WWW.
Microsemi
.COM
LX1734
1.2MHz Inverting DC/DC Converter
PRELIMINARY
A
M I CROS E M I
COM P A N Y
Supply Voltage (VIN)....................................................................................... 16V
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
Lead Temperature (Soldering, 10sec)........................................................... 300°C
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
.
SE
Plastic SOT-23 5-Pin
THERMAL RESISTANCE
-JUNCTION TO AMBIENT,
θ
JA
220
°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJC).
The
θ
JA numbers are guidelines for the thermal performance of the device/pc-board
system. All of the above assume no ambient airflow.
SE PAC KAG E
(T O P VIE W )
SW
GND
NFB
V
IN
NC
*
*N ot Internally C onnected
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 -1.242V.
Given the typical NFB bias current (INFB) of 4A flows out of the pin, the suggested value for R2 is 10K. Given
R2, set R1 according to:
()
NFB
2
OUT
1
I
R
242
.
1
242
.
1
V
R
+
=
VIN
Input Supply – Input pin must be locally bypassed.
PP
AA
CC
KK
AA
GG
EE
DD
AA
TT
AA
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