lt3958 Linear Technology Corporation, lt3958 Datasheet - Page 27

• Manufacturer Part Number: lt3958
• Description: High Input Voltage, Boost, Flyback, Sepic And Inverting Converter
• Manufacturer: Linear Technology Corporation

PACKAGE DESCRIPTION
6.00 0.10
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.20mm ON ANY SIDE
ON THE TOP AND BOTTOM OF PACKAGE
PIN 1
TOP MARK
(NOTE 6)
5.50 0.05
4.10 0.05
5.00 0.10
1.50 REF
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.
30
31
32
33
34
35
36
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
0.50 BSC
28
1
(Reference LTC DWG # 05-08-1836 Rev B)
36-Lead Plastic QFN (5mm × 6mm)
3.00 0.05
27
2
3
0.200 REF
1.88
0.00 – 0.05
0.12
Variation: UHE28MA
0.05
0.05
25
4
5.10 0.05
6.50 0.05
UHE Package
0.75 0.05
24
23
6
3.00 0.05
2.00 REF
0.48 0.05
0.25 0.05
21
8
1.53
0.05
2.00 REF
R = 0.10
20
9
TYP
28
27
25
24
23
21
20
10
BOTTOM VIEW—EXPOSED PAD
0.70 0.05
17
16
15
14
13
12
PACKAGE OUTLINE
1.88 0.10
1.53 0.10
0.25 0.05
17
30
0.50 BSC
16
31 32
0.12
0.10
3.00 0.10
3.00 0.10
15
0.48 0.10
33 34
14
1.50 REF
13
35
12
36
LT3958
(UHE28MA) QFN 0409 REV B
1
2
3
4
6
8
9
10
0.40 0.10
PIN 1 NOTCH
R = 0.30 OR
0.35 45
CHAMFER
R = 0.125
TYP
27
3958f