LTC3109 Linear Technology, LTC3109 Datasheet - Page 22

• Manufacturer Part Number: LTC3109
• Description: Ultralow Voltage Step-Up Converter and Power Manager
• Manufacturer: Linear Technology

LTC3109
package DescripTion

4.50 0.05
3.10 0.05
4.00 0.10
2.00 REF
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
NOTE:
1. DRAWING IS PROPOSED TO BE MADE A JEDEC PACKAGE OUTLINE MO-220
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
VARIATION (WGGD-1)—TO BE APPROVED
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
ON THE TOP AND BOTTOM OF PACKAGE
2.45 0.05
PIN 1
TOP MARK
(NOTE 6)
4.00 0.10
2.45 0.05
(Reference LTC DWG # 05-08-1710 Rev A)
20-Lead Plastic QFN (4mm × 4mm)
0.50 BSC
0.25 0.05
0.70 0.05
PACKAGE OUTLINE
UF Package
0.75 0.05
0.200 REF
0.00 – 0.05
2.00 REF
R = 0.05
TYP
R = 0.115
BOTTOM VIEW—EXPOSED PAD
2.45 0.10
TYP
2.45 0.10
19
20
0.50 BSC
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0.25 0.05
0.40 0.10
1
2
(UF20) QFN 01-07 REV A
PIN 1 NOTCH
R = 0.20 TYP
OR 0.35 45
CHAMFER
3109f