WKH Package 56-Lead QFN Multipad (7mm × 9mm) (Reference LTC DWG # 05-08-1870 Rev A) SEATING PLANE A 7.00 BSC 0.50 BSC 45 B PAD 1 CORNER 3 2.90 REF 2.63 REF 0.00 – 0.05 44 1 bbb M C A B 4 9.00 BSC PIN 1 ID 56 4.76 ±0.10 3.82 REF 1.97 ±0.10 3.15 ±0.10 4.06 ±0.10 0.95 REF 1.50 REF NX b 12 aaa C 2x 2.25 ±0.10 4.27 ±0.10 16 29 0.58 ±0.05 aaa C 2x TOP VIEW 0.90 ±0.10 6 NX 0.08 C // ccc C 7.50 ±0.05 2.90 REF 3.82 REF 3.15 ±0.05 4.76 ±0.05 0.85 × 0.85 (8×) 0.85 × 0.75 (15×) 1.50 REF 4.27 ±0.05 0.9 × 0.9 (8×) MLP56 QFN REV A 1013 3 THE LOCATION OF THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION CONFORMS TO JEDEC PUBLICATION 95 SPP-002 4 DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20mm AND 0.30mm FROM THE TERMINAL TIP. IF THE TERMINAL HAS THE OPTIONAL RADIUS ON THE OTHER END OF THE TERMINAL, THE DIMENSION b SHOULD NOT BE MEASURED IN THAT RADIUS AREA. 5 COPLANARITY APPLIES TO THE TERMINALS AND ALL OTHER SURFACE METALLIZATION 6 DRAWING SHOWN ARE FOR ILLUSTRATION ONLY 0.40 ±0.05 1.78 REF RECOMMENDED SOLDER PAD LAYOUT TOP VIEW 1.35 ±0.05 SYMBOL TOLERANCE aaa 0.15 bbb 0.10 ccc 0.10 7. PAD LAYOUT AND STENCIL LAYOUT AS GUIDE LINE ONLY. DRAWING NOT TO SCALE PACKAGE OUTLINE 0.25 ±0.05 0.25 ±0.05 BOTTOM VIEW (BOTTOM METALLIZATION DETAILS) 9.50 ±0.05 2.25 ±0.05 1.78 REF 17 NOTE: 1. DIMENSIONING AND TOLERANCING CONFORM TO ASME Y14.5M-1994 2. ALL DIMENSIONS ARE IN MILLIMETERS, ANGLES ARE IN DEGREES (°) 1.97 ±0.05 4.06 ±0.05 19 1.35 ± 0.05 5 2.63 REF 0.50 BSC PIN 1 3.82 REF 0.40 ±0.05 28 RECOMMENDED STENCIL DESIGN (SAME DIMENSIONS AS PAD LAYOUT, NOTE 7)