LTC4007_15 Datasheet, PDF (22/24 Pages) Linear Technology – 4A, High Effi ciency, Standalone Li-Ion Battery Charger

LTC4007
APPLICATIONS INFORMATION
SWITCH NODE
L1
V_BAT
HIGH
V_IN
C2
FREQUENCY
CIRCULATING
PATH
D1
C3
BAT
4007 F12
Figure 12. High Speed Switching Path
DIRECTION OF CHARGING CURRENT
R_SENSE
CSP
BAT
4007 F13
Figure 13. Kelvin Sensing of Charging Current
PACKAGE DESCRIPTION
GN Package
24-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.045 p.005
.337 – .344*
(8.560 – 8.738)
24 23 22 21 20 19 18 17 16 15 1413
.033
(0.838)
REF
.254 MIN
.150 – .165
.229 – .244
(5.817 – 6.198)
.150 – .157**
(3.810 – 3.988)
.0165 p.0015
.0250 BSC
RECOMMENDED SOLDER PAD LAYOUT
.015 p .004 _{s 45o}
(0.38 p 0.10)
.0075 – .0098
(0.19 – 0.25)
0o – 8o TYP
1 2 3 4 5 6 7 8 9 10 11 12
.0532 – .0688
(1.35 – 1.75)
.004 – .0098
(0.102 – 0.249)
.016 – .050
(0.406 – 1.270)
NOTE:
1. CONTROLLING DIMENSION: INCHES
2.
DIMENSIONS
ARE
IN
INCHES
(MILLIMETERS)
3. DRAWING NOT TO SCALE
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
.008 – .012
(0.203 – 0.305)
TYP
.0250
(0.635)
BSC
GN24 (SSOP) 0204
4007fc
22