A8519KETTR-R datasheet(34/35 Pages) ALLEGRO

34 / 35 page

Wide Input Voltage Range, High-Efficiency,

Fault-Tolerant LED Driver

A8519 and

A8519-1

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Figure 42: Package ET: 28-Pin QFN

with Exposed Thermal Pad

For Reference Only – Not for Tooling Use

(Reference JEDEC MO-220VHHD-1)

Dimensions in millimeters – NOT TO SCALE

Exact case and lead conﬁguration at supplier discretion within limits shown

0.25

+0.05

–0.07

0.55

+0.20

–0.10

0.50

0.90 ±0.10

0.08

29X

SEATING

PLANE

3.15

3.17

3.15

0.28

0.50

1.35

5.05

5.00 ±0.10

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 QFN50P500X500X100-29V1M);

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

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