20

LTC1553L

1553lf LT/TP 0198 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1998

Linear Technology Corporation

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

11

12

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

LTC1149

Current Mode Step-Down Switching Regulator Controller

LTC1159

Current Mode Step-Down Switching Regulator Controller

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

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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