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LM3502ITLX-44 数据表(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM3502ITLX-44
功能描述  Step-Up Converter for White LED Applications
Download  18 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM3502ITLX-44 数据表(HTML) 3 Page - National Semiconductor (TI)

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Pin Descriptions/Functions
(Continued)
≤ 0.3V, the internal NMOS FET switch turns on and the SUB
display turns off. When V
En2 is
≥ 1.4V, the internal NMOS
FET switch turns off and the SUB display turns on. The En2
pin has an internal pull down resistor, thus the internal
NMOS FET switch is normally in the on state of operation
with the SUB display turned off.
If V
En1 and VEn2 are
≤ 0.3V and V
Cntrl is
≥ 1.4V, the LM3502
will enter a low I
Q shutdown mode of operation where all the
internal FET switches are off. If V
OUT2 is not used, En2 must
be grounded or floating and use En1 along with Cntrl, to
enable the device.
En1 (Bump A2): Enable pin for the internal PMOS FET
switch (Figure 2: P1) during device operation. When V
En1 is
≤ 0.3V, the internal PMOS FET switch turns on and the MAIN
display is turned off. When V
En1 is
≥ 1.4V, the internal PMOS
FET switch turns off and the MAIN display is turned on. The
En1 pin has an internal pull down resistor, thus the internal
PMOS FET switch is normally in the on state of operation
with the MAIN display turned off. If V
En1 and VEn2 are
≤ 0.3V
and V
Cntrl is
≥ 1.4V, the LM3502 will enter a low I
Q shutdown
mode of operation where all the internal FET switches are
off. If V
OUT2 is not used, En2 must be grounded and use En1
a long with Cntrl, to enable the device.
Ordering Information
Voltage Option
Order Number
Package Marking
Supplied As
16
LM3502ITL-16
SANB
250 units, Tape-and-Reel
16
LM3502ITLX-16
SANB
3000 units, Tape-and-Reel
16
LM3502SQ-16
L00048B
250 units, Tape-and-Reel
16
LM3502SQX-16
L00048B
3000 units, Tape-and-Reel
25
LM3502ITL-25
SAPB
250 units, Tape-and-Reel
25
LM3502ITLX-25
SAPB
3000 units, Tape-and-Reel
25
LM3502SQ-25
L00049B
250 units, Tape-and-Reel
25
LM3502SQX-25
L00049B
3000 units, Tape-and-Reel
35
LM3502ITL-35
SARB
250 units, Tape-and-Reel
35
LM3502ITLX-35
SARB
3000 units, Tape-and-Reel
35
LM3502SQ-35
L00044B
250 units, Tape-and-Reel
35
LM3502SQX-35
L00044B
3000 units, Tape-and-Reel
44
LM3502ITL-44
SDLB
250 units, Tape-and-Reel
44
LM3502ITLX-44
SDLB
3000 units, Tape-and-Reel
44
LM3502SQ-44
L00050B
250 units, Tape-and-Reel
44
LM3502SQX-44
L00050B
3000 units, Tape-and-Reel
www.national.com
3


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