20
LTC1149
LTC1149-3.3/LTC1149-5
LINEAR TECHNOLOGY CORPORATION 1993
1149fa LT/TP 0898 REV A 2K • PRINTED IN USA
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
U
S Package
16-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.016 – 0.050
0.406 – 1.270
0.010 – 0.020
(0.254 – 0.508)
× 45°
0° – 8° TYP
0.008 – 0.010
(0.203 – 0.254)
S16 0695
1
2
3
4
5
6
7
8
0.150 – 0.157**
(3.810 – 3.988)
16
15
14
13
0.386 – 0.394*
(9.804 – 10.008)
0.228 – 0.244
(5.791 – 6.197)
12
11 10
9
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
TYP
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
*
**
TYPICAL APPLICATION
U
Figure 17. High Efficiency 24V Input 12V/3A Output Regulator
PART NUMBER DESCRIPTION COMMENTS
LTC1148HV High Efficiency, Synchronous Step-Down Switching Regulator 4V < V
IN
< 20V
LTC1159 High Efficiency, Synchronous Step-Down Switching Regulator 4V < V
IN
< 40V, I
SHUTDOWN
= 20µA
LTC1435A High Efficiency, Low Noise, Synchronous Switching Regulator 3.5V < V
IN
< 36V, N-Channel Driver
LTC1438 Dual, Low Noise, Synchronous Switching Regulator 3.5V < V
IN
< 36V, N-Channel Driver
RELATED PARTS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
PGATE
V
IN
V
CC
PDRIVE
V
CC
C
T
I
TH
SENSE
–
CAP
SHDN2
RGND
NGATE
PGND
SGND
V
FB
SENSE
+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LTC1149
0.068µF
0.047µF
1N4148 1N4148
3300pF
1k
300pF3.3µF
1000pF
MTP36N06E MBR160
220µF
50V
V
IN
20V TO 30V
L*
100µH
150µF
16V × 2
OS-CON
1149 F17
V
OUT
12V/3A
*HURRICANE LAB HL-EK210M
**KRL SL-1-C1-0R033J
MTP23P06
SHUTDOWN
100Ω
100Ω
R1
20k
1%
R2
172k
1%
R
SENSE
**
0.033Ω
OUTPUT
GROUND
CONNECTION
100pF
+
+
+
