LTC1909-8 LINER [Linear Technology], LTC1909-8 Datasheet - Page 31

• Manufacturer Part Number: LTC1909-8
• Description: Wide Operating Range,No RSENSE TM Step-Down DC/DC Controller with SMBus Programming
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
PACKAGE DESCRIPTIO
U
7.8 – 8.2
0.42 0.03
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
**
(.0035 – .010)
*
0.09 – 0.25
DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED .152mm (.006") PER SIDE
DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED .254mm (.010") PER SIDE
C
U
C1
RECOMMENDED SOLDER PAD LAYOUT
R
R
ON
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.
C
C
SS
BOLD LINES INDICATE HIGH CURRENT PATHS
(.197 – .221)
C
5.00 – 5.60**
FB
C
W
C2
(.022 – .037)
MILLIMETERS
0.55 – 0.95
10
11
12
13
14
(INCHES)
1
2
3
4
5
6
7
8
9
U
RUN/SS
V
PGOOD
V
FCB
I
SGND
I
V
SEL
SDA
SCL
VRON
PGTMR
TH
ON
ON
RNG
FB
Figure 12. LTC1909-8 PCB Layout Diagram
LTC1909-8
V
SENSE
EXTV
CPUON
(Reference LTC DWG # 05-08-1640)
BOOST
INTV
OSENSE
28-Lead Plastic SSOP (5.3mm)
PGND
GND
U
V
SW
V
BG
TG
CC
CC
CC
FB
IN
+
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1.25 0.12
5.3 – 5.7
0 – 8
0.65 BSC
G Package
C
VCC
C
D
B
B
(.0256)
C
0.65
BSC
F
R
F
28
1 2 3 4 5 6 7 8 9 10 11 12
(.009 – .015)
27
0.22 – 0.38
26
M2
25
C
OUT
24
9.90 – 10.50*
(.390 – .413)
23
D1
22 21 20 19 18 17 16 15
M1
C
IN
19098 F12
13
14
G28 SSOP 0802
(.002)
0.05
(.079)
+
–
–
+
2.0
(.291 – .323)
7.40 – 8.20
V
V
IN
OUT
LTC1909-8
31
19098f