NRND

LM5100, LM5101

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SNVS267C – MAY 2004 – REVISED MARCH 2005

Pin #

Name

Description

Application Information

WSON-

SO-8

10

1

1

Positive gate drive supply

close to IC as possible.

2

2

HB

High side gate driver bootstrap

Connect the positive terminal of the bootstrap capacitor to HB and

rail

the negative terminal to HS. The Bootstrap capacitor should be place

as close to IC as possible.

3

3

HO

High side gate driver output

Connect to gate of high side MOSFET with a short low inductance

path.

4

4

HS

High side MOSFET source

Connect to bootstrap capacitor negative terminal and the source of

connection

the high side MOSFET.

5

7

HI

High side driver control input

The LM5100 inputs have CMOS type thresholds. The LM5101 inputs

have TTL type thresholds. Unused inputs should be tied to ground

and not left open.

6

8

LI

Low side driver control input

The LM5100 inputs have CMOS type thresholds. The LM5101 inputs

have TTL type thresholds. Unused inputs should be tied to ground

and not left open.

7

9

Ground return

All signals are referenced to this ground.

8

10

LO

Low side gate driver output

Connect to the gate of the low side MOSFET with a short low

inductance path.

(1)

Note: For WSON-10 package, it is recommended that the exposed pad on the bottom of the LM5100 / LM5101 be soldered to

ground plane on the PC board, and the ground plane should extend out from beneath the IC to help dissipate the heat. Pins 5

and 6 have no connection.

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Copyright © 2004–2005, Texas Instruments Incorporated

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Product Folder Links: LM5100 LM5101