lt3845ife-trpbf Linear Technology Corporation, lt3845ife-trpbf Datasheet - Page 19

• Manufacturer Part Number: lt3845ife-trpbf
• Description: High Voltage Synchronous Current Mode Step-down Controller With Adjustable Operating Frequency
• Manufacturer: Linear Technology Corporation

Locate the feedback resistors in close proximity to the
LT3845 to minimize the length of the high impedance
V
The SENSE
and kept as short as possible.
APPLICATIONS INFORMATION
FB
node.
–
and SENSE
+
traces should be routed together
Orientation of Components Isolates Power Path and PGND Currents,
COMPONENTS
REFERRED
SGND
Preventing Corruption of SGND Reference
SGND
LT3845
BOOST
PGND
V
SW
CC
The LT3845 packaging has been designed to effi ciently
remove heat from the IC via the Exposed Pad on the
backside of the package. The Exposed Pad is soldered to
a copper footprint on the PCB. This footprint should be
made as large as possible to reduce the thermal resistance
of the IC case to ambient air.
+
V
V
OUT
IN
+
I
SENSE
TG
BG
3845 AI03
SW
LT3845
19
3845fc