LTC1553L View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1553L

5-Bit Programmable Synchronous Switching Regulator Controller for Pentium® II Processor

Linear Technology 

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LTC1553L

PACKAGE DESCRIPTION Dimension in inches (millimeters) unless otherwise noted.

SW Package

20-Lead Plastic Small Outline (Wide 0.300)

(LTC DWG # 05-08-1620)

0.496 – 0.512*

(12.598 – 13.005)

20 19 18 17 16 15 14 13 12 11

NOTE 1

0.394 – 0.419

(10.007 – 10.643)

0.291 – 0.299**

(7.391 – 7.595)

0.010

(0.254

–

–

0.029

0.737)

×

45°

1 2 3 4 5 6 7 8 9 10

0.093 – 0.104

(2.362 – 2.642)

0.037 – 0.045

(0.940 – 1.143)

0° – 8° TYP

0.050

0.009 – 0.013

(0.229 – 0.330)

NOTE:

NOTE 1

0.016 – 0.050

(0.406 – 1.270)

(1.270)

TYP

0.014 – 0.019

(0.356 – 0.482)

TYP

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

0.004 – 0.012

(0.102 – 0.305)

S20 (WIDE) 0396

RELATED PARTS

PART NUMBER DESCRIPTION

LTC1142

Current Mode Dual Step-Down Switching Regulator Controller

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

LTC1430

High Power Step-Down Switching Regulator Controller

LTC1435

High Efficiency Low Noise Synchronous Step-Down

Switching Regulator

LTC1438

Dual High Efficiency Low Noise Synchronous Step-Down

Switching Regulator

LTC1553

5-Bit Programmable Synchronous Switching Regulator

Controller for Pentium II Processor

COMMENTS

Dual Version of LTC1148

Synchronous, VIN ≤ 20V

Synchronous, VIN ≤ 48V, for Standard Threshold FETs

Synchronous, VIN ≤ 40V, for Logic Threshold FETs

Synchronous N- or P-Channel FETs, Comparator/Low-Battery Detector

Synchronous N-Channel FETs, Voltage Mode

Drive Synchronous N-Channel, VIN ≤ 36V

Dual LTC1435 with Power-On Reset

High Voltage Version of LTC1553L

20 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417q (408)432-1900

FAX: (408) 434-0507q TELEX: 499-3977 q www.linear-tech.com

1553lf LT/TP 0198 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1998

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