LTC1642IGN Linear Technology, LTC1642IGN Datasheet - Page 15

• Manufacturer Part Number: LTC1642IGN
• Description: IC CONTROLLER HOTSWAP ADJ 16SSOP
• Manufacturer: Linear Technology
• Type: Hot-Swap Controllerr

Specifications of LTC1642IGN

• Applications: General Purpose, Infiniband™
• Internal Switch(s): No
• Voltage - Supply: 2.97 V ~ 16.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP (0.150", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATIO S I FOR ATIO
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 comparator’s input transistors are MOSFETs so the
input bias and offset currents are very small: typically
picoamps at 25°C, increasing to nanoamps at 90°C. If the
auxiliary comparator is unused, the COMP
COMPOUT pins may be left floating.
U
U
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.
RESISTOR, R2
TO SHORT
W
Figure 15. Recommended Layout for R1, R2 and R5
V
SENSE
CC
PIN
I
+
LOAD
, COMP
R6
R5
U
–
and
R2
I
LOAD
Layout Considerations
One ounce copper exhibits a sheet resistance of 530µΩ
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 LTC1642’s V
SENSE pins directly across sense resistor R2 to prevent
the power trace’s 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 divider’s connections to the V
and GND pins short. Figure 15 shows an example layout.
LT1642
1642 F15
LTC1642
15
CC
1642fb
and
CC