lm5100amx National Semiconductor Corporation, lm5100amx Datasheet - Page 3

• Manufacturer Part Number: lm5100amx
• Description: 3a, 2a And 1a High Voltage High-side And Low-side Gate Drivers
• Manufacturer: National Semiconductor Corporation

Pin Descriptions
SO-8
Note: For LLP-10 package, it is recommended that the exposed pad on the bottom of the package be soldered to ground plane on the PC board, and that
ground plane should extend out from beneath the IC to help dissipate heat. Pins 5 and 6 have no connection.
1
2
3
4
5
6
7
8
Pin #
LLP-10
10
1
2
3
4
7
8
9
VDD
HB
HO
HS
HI
LI
VSS
LO
Name
Positive gate drive supply
High-side gate driver
bootstrap rail
High-side gate driver output
High-side MOSFET source
connection
High-side driver control input
Low-side driver control input
Ground return
Low-side gate driver output
Description
3
Locally decouple to VSS using low ESR/ESL capacitor
located as close to the IC as possible.
Connect the positive terminal of the bootstrap capacitor to HB
and the negative terminal to HS. The bootstrap capacitor
should be placed as close to the IC as possible.
Connect to the gate of high-side MOSFET with a short, low
inductance path.
Connect to the bootstrap capacitor negative terminal and the
source of the high-side MOSFET.
The LM5100A/B/C inputs have CMOS type thresholds. The
LM5101A/B/C inputs have TTL type thresholds. Unused
inputs should be tied to ground and not left open.
The LM5100A/B/C inputs have CMOS type thresholds. The
LM5101A/B/C inputs have TTL type thresholds. Unused
inputs should be tied to ground and not left open.
All signals are referenced to this ground.
Connect to the gate of the low-side MOSFET with a short, low
inductance path.
Application Information
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