Datasheet

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
[phone]
●
FAX: [phone]
●
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
+
+
+