參數(shù)資料
型號: LTC1642CGN#TRPBF
廠商: Linear Technology
文件頁數(shù): 15/16頁
文件大?。?/td> 243K
描述: IC CONTROLLER HOTSWAP ADJ 16SSOP
標準包裝: 2,500
類型: 熱交換控制器
應用: 通用型 Infiniband?
內部開關:
電源電壓: 2.97 V ~ 16.5 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應商設備封裝: 16-SSOP
包裝: 帶卷 (TR)
15
LTC1642
1642fb
Uncommitted Comparator
The uncommitted comparator has an open drain output.
The comparator has 3mV of hysteresis: the output goes
high when the differential input voltage exceeds 1.5mV
and goes low when the differential input is less than
1.5mV.
The comparators input transistors are MOSFETs so the
input bias and offset currents are very small: typically
picoamps at 25癈, increasing to nanoamps at 90癈. If the
auxiliary comparator is unused, the COMP
+
, COMP

 and
COMPOUT pins may be left floating.
APPLICATIO  S I FOR  ATIO
U
U
U
R6
SENSE
RESISTOR, R2
TO SHORT
V
CC
 PIN
R2
1642 F15
R5
LT1642
I
LOAD
I
LOAD
Figure 15. Recommended Layout for R1, R2 and R5
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Layout Considerations
One ounce copper exhibits a sheet resistance of 530?
per square. To minimize self-heating, traces should be
at least 0.02" wide per ampere of current and 0.03" is
recommended.
In high current applications, the voltage drop along traces
can be appreciable. Connect the LTC1642s V
CC
  and
SENSE pins directly across sense resistor R2 to prevent
the power traces resistance from adding to R2. It is also
a good practice to keep the resistor divider to the ON pin
close to the chip and the dividers connections to the V
CC
and GND pins short. Figure 15 shows an example layout.
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