LTC3421

15

3421f

PACKAGE DESCRIPTIO

UF Package

24-Lead Plastic QFN (4mm

× 4mm)

(Reference LTC DWG # 05-08-1697)

4.00

± 0.10

(4 SIDES)

NOTE:

1. DRAWING PROPOSED TO BE MADE A JEDEC PACKAGE OUTLINE MO-220 VARIATION (WGGD-X)—TO BE APPROVED

2. ALL DIMENSIONS ARE IN MILLIMETERS

3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE

MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE, IF PRESENT

4. EXPOSED PAD SHALL BE SOLDER PLATED

5. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION

ON THE TOP AND BOTTOM OF PACKAGE

6. DRAWING NOT TO SCALE

PIN 1

TOP MARK

(NOTE 5)

0.38

± 0.10

24

0.23 TYP

(4 SIDES)

23

1

2

BOTTOM VIEW—EXPOSED PAD

2.45

± 0.10

(4-SIDES)

0.75

± 0.05

R = 0.115

TYP

0.25

± 0.05

0.50 BSC

0.200 REF

0.00 – 0.05

(UF24) QFN 0603

RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS

0.70

±0.05

0.25

±0.05

0.50 BSC

2.45

± 0.05

(4 SIDES)

3.10

± 0.05

4.50

± 0.05

PACKAGE OUTLINE

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 represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.