20
LTC1553L
1553lf LT/TP 0198 4K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1998
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
(408) 432-1900
FAX: (408) 434-0507
●
TELEX: 499-3977
●
www.linear-tech.com
PACKAGE DESCRIPTION
U
Dimension in inches (millimeters) unless otherwise noted.
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
*
**
PART NUMBER DESCRIPTION COMMENTS
LTC1142 Current Mode Dual Step-Down Switching Regulator Controller Dual Version of LTC1148
LTC1148 Current Mode Step-Down Switching Regulator Controller Synchronous, V
IN
≤ 20V
LTC1149 Current Mode Step-Down Switching Regulator Controller Synchronous, V
IN
≤ 48V, for Standard Threshold FETs
LTC1159 Current Mode Step-Down Switching Regulator Controller Synchronous, V
IN
≤ 40V, for Logic Threshold FETs
LTC1266 Current Mode Step-Up/Down Switching Regulator Controller Synchronous N- or P-Channel FETs, Comparator/Low-Battery Detector
LTC1430 High Power Step-Down Switching Regulator Controller Synchronous N-Channel FETs, Voltage Mode
LTC1435 High Efficiency Low Noise Synchronous Step-Down Drive Synchronous N-Channel, V
IN
≤ 36V
Switching Regulator
LTC1438 Dual High Efficiency Low Noise Synchronous Step-Down Dual LTC1435 with Power-On Reset
Switching Regulator
LTC1553 5-Bit Programmable Synchronous Switching Regulator High Voltage Version of LTC1553L
Controller for Pentium II Processor
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