lm5109asdx National Semiconductor Corporation, lm5109asdx Datasheet - Page 2

• Manufacturer Part Number: lm5109asdx
• Description: High Voltage 1a Peak Half Bridge Gate Driver
• Manufacturer: National Semiconductor Corporation

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Connection Diagrams
Ordering Information
Pin Descriptions
SO-8
Note: For LLP-8 package it is recommended that the exposed pad on the bottom of the package be soldered to ground plane on the PCB and the ground
plane should extend out from underneath the package to improve heat dissipation.
1
2
3
4
5
6
7
8
Ordering Number
LM5109AMA
LM5109AMAX
LM5109ASD
LM5109ASDX
Pin #
LLP-8
1
2
3
4
5
6
7
8
V
HI
LI
V
LO
HS
HO
HB
DD
SS
Name
Package Type
SOIC-8
SOIC-8
LLP-8
LLP-8
Positive gate drive supply
High side control input
Low side control input
Ground reference
Low side gate driver output
High side source connection
High side gate driver output
High side gate driver positive
supply rail
20170202
Description
FIGURE 2.
NSC Package Drawing
M08A
M08A
SDC08A
SDC08A
2
Locally decouple to V
as close to IC as possible.
The HI input is compatible with TTL input thresholds. Unused
HI input should be tied to ground and not left open
The LI input is compatible with TTL input thresholds. Unused
LI input should be tied to ground and not left open.
All signals are referenced to this ground.
Connect to the gate of the low-side N-MOS device.
Connect to the negative terminal of the bootstrap capacitor
and to the source of the high-side N-MOS device.
Connect to the gate of the high-side N-MOS device.
Connect the positive terminal of the bootstrap capacitor to HB
and the negative terminal of the bootstrap capacitor to HS.
The bootstrap capacitor should be placed as close to IC as
possible.
Application Information
SS
using low ESR/ESL capacitor located
95 Units in anti static rails
2500 Units on Tape & Reel
1000 Units on Tape & Reel
4500 Units on Tape & Reel
Supplied As
20170203