Datasheet

19
LT1339
sn1339 1339fas
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.
SW Package
20-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
S20 (WIDE) 0396
NOTE 1
0.496 – 0.512*
(12.598 – 13.005)
20
19 18
17
16
15
14 13
1
23
4
5
6
78
0.394 – 0.419
(10.007 – 10.643)
910
1112
0.037 – 0.045
(0.940 – 1.143)
0.004 – 0.012
(0.102 – 0.305)
0.093 – 0.104
(2.362 – 2.642)
0.050
(1.270)
TYP
0.014 – 0.019
(0.356 – 0.482)
TYP
0
° – 8° TYP
NOTE 1
0.009 – 0.013
(0.229 – 0.330)
0.016 – 0.050
(0.406 – 1.270)
0.291 – 0.299**
(7.391 – 7.595)
× 45°
0.010 – 0.029
(0.254 – 0.737)
NOTE:
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
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
*
**
PACKAGE DESCRIPTION
U
Dimensions in inches (millimeters) unless otherwise noted.
N Package
20-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
N20 1197
0.020
(0.508)
MIN
0.125
(3.175)
MIN
0.130 ± 0.005
(3.302 ± 0.127)
0.065
(1.651)
TYP
0.045 – 0.065
(1.143 – 1.651)
0.018 ± 0.003
(0.457 ± 0.076)
0.005
(0.127)
MIN
0.100 ± 0.010
(2.540 ± 0.254)
0.009 – 0.015
(0.229 – 0.381)
0.300 – 0.325
(7.620 – 8.255)
0.325
+0.035
–0.015
+0.889
–0.381
8.255
()
0.255 ± 0.015*
(6.477 ± 0.381)
1.040*
(26.416)
MAX
12
3
4
5
6
7
8
910
19 1112
131416
1517
18
20
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
TYPICAL APPLICATIONS
U
5V to 28V DC/DC Synchronous Boost Converter Limits Input Current at 60A (DC)
V
BOOST
TG
TS
12V
IN
BG
PGND
PHASE
RUN/SHDN
SENSE
–
SENSE
+
12V
C
12VIN
47µF
IRF3205
× 2
IRF3205
× 4
L1
40µH
V
IN
5V AT 60A
R
FB2
, 1.2k
R
FB1
, 27k
SYNC
5V
REF
CT
SL/ADJ
I
AVG
SS
V
C
SGND
V
FB
V
REF
LT1339
+
CBST
1µF
+
C
IN
2200µF
6.3V
× 4
+
C
12L
1µF
+
R
R1
100k
R
CT
10k
C
CT
2200pF
C
AVG
2200pF
C
SS
, 10µF
C
VC
, 1500pF
R
VC
, 7.5k
C
REF
, 0.1µF
1339 TA04
L1 = 12T 4X12 ON 77439-A7
C
5VREF
1µF
DBST
MBR0530
Q1
FMMT619
Q2
FMMT720
Q3
FMMT619
Q4
FMMT720
D2
MBR0520
D1
IR30BQ060
× 8
R
SS2
, 100Ω
R
SS1
100Ω
R
S
0.002Ω
C
OUT
2200µF
35V
× 6
+
V
OUT
28V
+
+