HI

LI

V

SS

HO

HS

LO

HB

V

DD

1

2

3

4

8

7

6

5

HI

LI

V

SS

HO

HS

LO

HB

V

DD

1

2

3

4

8

7

6

5

DRIVER

DRIVER

LEVEL

SHIFT

UVLO

UVLO

HI

LI

HB

HO

HS

LO

HV

LM5107

SNVS333D – NOVEMBER 2004 – REVISED MARCH 2013

www.ti.com

Simplified Block Diagram

Connection Diagrams

Figure 1. 8-Lead SOIC

Figure 2. 8-Lead WSON

See D Package

See NGT0008A Package

Pin #

Name

Description

Application Information

SOIC

WSON

1

1

Positive gate drive supply

close to IC as possible.

The LM5107 HI input is compatible with TTL input thresholds.

2

2

HI

High side control input

Unused HI input should be tied to ground and not left open

The LM5107 LI input is compatible with TTL input thresholds. Unused

3

3

LI

Low side control input

LI input should be tied to ground and not left open.

4

4

Ground reference

All signals are referenced to this ground.

5

5

LO

Low side gate driver output

Connect to the gate of the low side N-MOS device.

Connect to the negative terminal of the bootstrap capacitor and to the

6

6

HS

High side source connection

source of the high side N-MOS device.

7

7

HO

High side gate driver output

Connect to the gate of the low side N-MOS device.

Connect the positive terminal of the bootstrap capacitor to HB and

High side gate driver positive

8

8

HB

the negative terminal of the bootstrap capacitor to HS. The bootstrap

supply rail

capacitor should be placed as close to IC as possible.

(1)

For WSON package it is recommended that the exposed pad on the bottom of the LM5107 be soldered to ground plane on the PCB

board and the ground plane should extend out from underneath the package to improve heat dissipation.

2

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