Datasheet
19
LTC1149
LTC1149-3.3/LTC1149-5
TYPICAL APPLICATIO S
U
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 representation that
the interconnection of its circuits as described herein will not infringe on existing patent rights.
N16 1197
0.255 ± 0.015*
(6.477 ± 0.381)
0.770*
(19.558)
MAX
16
1
2
3
4
5
6
7
8
910
11
12
13
14
15
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)
0.100 ± 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
()
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
N Package
16-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
U
Figure 16. 25W High Efficiency Regulator Using N-Channel MOSFET Switches
0.1µF
PGATE
V
IN
V
CC
PDRIVE
V
CC
C
T
I
TH
SENSE
–
CAP
SHDM2
RGND
NGATE
PGND
SGND
SHDN1
SENSE
+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LTC1149-5
1N4148
3300pF
1k
820pF3.3µF
1000pF
IRFZ44 MBR380
1000µF
63V
L*
50µH
R
SENSE
**
0.02Ω
220µF
10V × 2
OS-CON
1149 F16
V
OUT
5V/5A
*COILTRONICS CTX50-5-52
**DALE LVR-3-0.02
V
IN
12V TO 36V
100Ω
100Ω
0V = NORMAL
>2V = SHUTDOWN
VN2222LL
10k
470Ω
2N2222
220Ω
2N3906
0.1µF
MTP30N06EL
MUR110
SEE APPLICATIONS INFORMATION TO SUPPRESS
Burst Mode
TM
OPERATION AT LOW CURRENTS
+
+
+