Multiple-Output Regulator for

Automotive LCD Displays

A8603

36

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Figure 21: Package ES, 24-Pin 4 mm × 4 mm QFN with Exposed Thermal Pad and Wettable Flank

For Reference Only – Not for Tooling Use

(Reference JEDEC MO-220WGGD)

Dimensions in millimeters –NOT TO SCALE

Exact case and lead configuration at supplier discretion within limits shown

C

SEATING

PLANE

C

0.08

24X

2

1

1

2

2

1

A

A

B

C

D

D

C

4.00 ±0.10

4.00 ±0.10

4.10

0.30

0.50

4.10

0.75 ±0.05

0.55 REF

0.22 ±0.05

B

PCB Layout Reference View

Terminal #1 mark area

Exposed thermal pad (reference only, terminal #1 identifier appearance at supplier discretion)

Reference land pattern layout (reference IPC7351 QFN50P400X400X80-25W6M); all pads a minimum of 0.20 mm

from all adjacent pads; adjust as necessary to meet application process requirements and PCB layout tolerances;

when mounting on a multilayer PCB, thermal vias at the exposed thermal pad land can improve thermal dissipation

(reference EIA/JEDEC Standard JESD51-5)

Coplanarity includes exposed thermal pad and terminals

0.90

24

24

24

2.10 ±0.10

2.10 ±0.10

2.10

2.10

0.50 BSC

0.40 ±0.10

0.0-0.05

0.40 ±0.10

0.05 REF

0.10 REF

0.203 REF

Detail A

DETAIL A

0.05 REF

0.20 REF

0.10 REF

0.14 REF