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LTC4278 Datasheet(PDF) 39 Page - Linear Technology

Part # LTC4278
Description  IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support
PDF  40 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4278 Datasheet(HTML) 39 Page - Linear Technology

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LTC4278
39
4278f
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PACKAGE DESCRIPTION
NOTE:
1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WXXX)
IN JEDEC PACKAGE OUTLINE M0-229
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
PIN 1
TOP MARK
(SEE NOTE 6)
BOTTOM VIEW—EXPOSED PAD
R = 0.115
TYP
0.20 ± 0.05
1
16
17
32
6.00 REF
6.43 ±0.10
2.65 ±0.10
4.00 ±0.10
0.75 ±0.05
0.00 – 0.05
0.200 REF
7.00 ±0.10
(DKD32) QFN 0707 REV A
0.40 BSC
RECOMMENDED SOLDER PAD LAYOUT
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.20mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON THE TOP AND BOTTOM OF PACKAGE
PIN 1 NOTCH
R = 0.30 TYP OR
0.35 × 45° CHAMFER
6.43 ±0.05
2.65 ±0.05
0.70 ± 0.05
0.40 BSC
6.00 REF
3.10 ± 0.05
4.50 ± 0.05
0.40 ± 0.10
0.20 ± 0.05
PACKAGE
OUTLINE
R = 0.05
TYP
DKD Package
32-Lead Plastic DFN (7mm × 4mm)
(Reference LTC DWG # 05-08-1734 Rev A)



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