LM5104M National Semiconductor, LM5104M Datasheet - Page 10

• Manufacturer Part Number: LM5104M
• Description: MOSFET Driver IC
• Manufacturer: National Semiconductor

Specifications of LM5104M

• Driver Case Style: NSOIC
• No. Of Pins: 8
• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Package / Case: 8-NSOIC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Startup and UVLO
(Continued)
The total IC power dissipation can be estimated from the
above plots by summing the gate drive losses with the
bootstrap diode losses for the intended application. Because
Diode Power Dissipation V
= 40V
IN
the diode losses can be significant, an external diode placed
in parallel with the internal bootstrap diode (refer to Figure 4)
can be helpful in removing power from the IC. For this to be
effective, the external diode must be placed close to the IC to
minimize series inductance and have a significantly lower
forward voltage drop than the internal diode.
20089008
20089009
FIGURE 4. LM5104 Driving MOSFETs Connected in Synchronous Buck Configuration
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