LT3957 datasheet(18/24 Pages) LINER

Part #	LT3957

Description	Wide Input Voltage Range Boost/SEPIC/Inverting Converter with 6A, 40V Switch

PDF	24 Pages

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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18 / 24 page

LT3959

3959f

APPLICATIONS INFORMATION

Check the stress on the internal power MOSFET by mea-

suring the SW-to-GND voltage directly across the IC ter-

minals. Make sure the inductive ringing does not exceed

the maximum rating of the internal power MOSFET (40V).

The small-signal components should be placed away from

high frequency switching nodes. For optimum load regula-

tion and true remote sensing, the top of the output voltage

sensing resistor divider should connect independently to

the top of the output capacitor (Kelvin connection), staying

away from any high dV/dt traces. Place the divider resis-

tors near the LT3959 in order to keep the high impedance

FBX node short.

Figure 5 shows the suggested layout of the 2.5V to 8V

input, 12V output boost converter in the Typical Applica-

tion section.

LT3957 Datasheet(PDF) 18 Page - Linear Technology