參數(shù)資料
型號： LX1741CLM
英文描述： DC:DC Converter
中文描述： 直流：DC轉(zhuǎn)換器
文件頁數(shù)： 3/15頁
文件大小： 459K
代理商： LX1741CLM
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright
2000
Rev. 1.1, 2002-11-21
W
M
.
C
LX1741
High Efficiency High Voltage Boost Controller
P
RODUCTION
D
ATA
S
HEET
I N T E G R A T E D P R O D U C T S
E L E C T R I C A L C H A R A C T E R I S T I C S
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0
°
C
≤
T
A
≤
70
°
C except where
otherwise noted and the following test conditions:
V
IN
= 3V, V
OUT
= 18.5V, V
ADJ
= 0V, R
LOAD
= 9.25
k
,
SHDN
= V
IN
LX1741
Typ
Parameter
Symbol
Test Conditions
Min
1.6
Max
6.0
1.6
Units
Operating Voltage
Minimum Start-up Voltage
Start-up Voltage Temperature
Coefficient
V
IN
V
SU
T
A
= +25
°
C
V
V
k
VST
-2
mV/
°
C
μ
A
μ
A
V
nA
V
FB
= 1.5V
V
SHDN
< 0.4V
V
ADJ
= GND
V
FB
= 1.4V
80
0.2
1.290
100
0.5
1.316
200
V
IN
–
100mV
1.0
0.8
50
0.4
7.0
500
Quiescent Current
I
Q
FB Threshold Voltage
FB Input Bias Current
V
FB
I
FB
V
ADJ
1.264
-200
ADJ Input Voltage Range
1
0
V
μ
A
A
RMS
nA
V
V
μ
A
mA
ns
mA
mA
ns
ADJ Input Bias Current
SRC Input Current
Shutdown Input Bias Current
Shutdown High Input Voltage
Shutdown Low Input Voltage
Current Sense Bias Current
Minimum Peak Current
Comparator A Delay
NDRV Sink Current
NDRV Source Current
Minimum Off-Time
Notes:
1. When using a DC source to adjust V
OUT
, the recommended V
ADJ
(range) is from 0.9V to 1.50V: see figure 3 and 8.
2. Guaranteed typical value (not tested) @ T
A
= 25
C (see section “Inductor Selection and Current Limit Programming”)
I
ADJ
I
SRC
I
SHDN
V
SHDN
V
SHDN
I
CS
I
MIN
t
D
I
SNK
I
SRC
t
OFF
V
ADJ
= V
FB
= 1.29V
SHDN
= GND
V
IN
= 2V
V
IN
= 2V
GBNT
2
GBNT
2
V
IN
= 5V
V
IN
= 5V
V
FB
= 1V
0.3
-50
1.6
3.0
50
100
100
5.0
145
620
S I M P L I F I E D B L O C K D I A G R A M
Logic
Controller
Reference
Logic
ADJ
FB
Shutdown
Logic
SHDN
CS
Driver
GND
NDRV
IN
4
μ
A
SRC
2.5M
50pF
A
B
1.29V
Reference
E
L
E
C
T
R
I
C
A
L
S
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