EEWORLDEEWORLDEEWORLD

Part Number

Search

LTC1553LCSW

Description
5-Bit Programmable Synchronous Switching Regulator Controller for Pentium II Processor
CategoryPower/power management    The power supply circuit   
File Size284KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC1553LCSW Overview

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

LTC1553LCSW Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP, SOP20,.4
Contacts20
Manufacturer packaging codeSW
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage6 V
Minimum input voltage4.5 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G20
JESD-609 codee0
length12.8 mm
Humidity sensitivity level1
Number of functions1
Number of terminals20
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP20,.4
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height2.65 mm
Maximum supply current (Isup)1.2 mA
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency350 kHz
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width7.5 mm
Base Number Matches1
LTC1553L
5-Bit Programmable
Synchronous Switching
Regulator Controller for
Pentium
®
II Processor
FEATURES
s
s
DESCRIPTION
The LTC
®
1553L is a high power, high efficiency switching
regulator controller optimized for a 5V input to 1.8V-3.5V
output applications. It features a digitally programmable
output voltage, a precision internal reference and an internal
feedback system that provides output accuracy of
±1.5%
at
room temperature and typically
±2%
over-temperature, load
current and line voltage shifts. The LTC1553L uses a syn-
chronous switching architecture with two external N-channel
output devices, providing high efficiency and eliminating the
need for a high power, high cost P-channel device. Addition-
ally, it senses the output current across the on-resistance of
the upper N-channel FET, providing an adjustable current
limit without an external low value sense resistor.
The LTC1553L free-runs at 300kHz and can be synchronized
to a faster external clock if desired. It includes all the inputs
and outputs required to implement a power supply conform-
ing to the
Intel Pentium
®
II Processor VRM 8.2 DC/DC
Converter Specification.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
s
s
s
s
s
s
s
s
s
5-Bit Digitally Programmable 1.8V to 3.5V Fixed
Output Voltage
Provides All Features Required by the
Intel
Pentium
®
II Processor VRM 8.2 DC/DC
Converter Specification
Flags for Power Good, Over-Temperature and
Overvoltage Fault
19A Output Current Capability from a 5V Supply
Dual N-Channel MOSFET Synchronous Driver
Initial Output Accuracy:
±1.5%
Excellent Output Accuracy:
±2%
Typ Over Line,
Load and Temperature Variations
High Efficiency: Over 95% Possible
Adjustable Current Limit Without External Sense
Resistors
Fast Transient Response
Available in 2O-Lead SSOP and SW Packages
APPLICATIONS
s
s
Power Supply for Pentium II, SPARC, ALPHA and
PA-RISC Microprocessors
High Power 5V to 1.8V-3.5V Regulators
TYPICAL APPLICATION
+
0.1µF
5.6k
5.6k
5.6k
V
CC
I
MAX
10µF
2.7k
PV
CC
12V
+
0.1µF
10µF
PWRGD
PENTIUM II
SYSTEM
®
PV
CC
G1
20Ω
Q1*
L
O
2µH
18A
C
OUT
††
330µF
×
7
V
OUT
1.8V TO
3.5V
14A
FAULT
5
OT
VID0 TO VID4
OUTEN
COMP
C1
150pF
R
C
8.2k
C
C
0.01µF
SS
SGND
GND
SENSE
LTC1553L
I
FB
G2
C
SS
0.1µF
0.1µF
*SILICONIX SUD50N03-10
**SANYO 10MV1200GX
COILTRONICS CTX02-13198 OR
PANASONIC 12TS-2R5SP
††
AVX TPSE337M006R0100
Figure 1. 5V to 1.8V-3.5V Supply Application
U
V
IN
5V
U
U
+
C
IN
**
1200µF
×
4
+
Q2*
1553L F01
1

LTC1553LCSW Related Products

LTC1553LCSW LTC1553LCG LTC1553L
Description 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium II Processor 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium II Processor 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium II Processor
Brand Name Linear Technology Linear Technology -
Is it Rohs certified? incompatible incompatible -
Maker Linear ( ADI ) Linear ( ADI ) -
Parts packaging code SOIC SSOP -
package instruction SOP, SOP20,.4 SSOP, SSOP20,.3 -
Contacts 20 20 -
Manufacturer packaging code SW G -
Reach Compliance Code not_compliant not_compliant -
ECCN code EAR99 EAR99 -
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER -
control mode CURRENT-MODE CURRENT-MODE -
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION -
Maximum input voltage 6 V 6 V -
Minimum input voltage 4.5 V 4.5 V -
Nominal input voltage 5 V 5 V -
JESD-30 code R-PDSO-G20 R-PDSO-G20 -
JESD-609 code e0 e0 -
length 12.8 mm 7.2 mm -
Humidity sensitivity level 1 1 -
Number of functions 1 1 -
Number of terminals 20 20 -
Maximum operating temperature 70 °C 70 °C -
Package body material PLASTIC/EPOXY PLASTIC/EPOXY -
encapsulated code SOP SSOP -
Encapsulate equivalent code SOP20,.4 SSOP20,.3 -
Package shape RECTANGULAR RECTANGULAR -
Package form SMALL OUTLINE SMALL OUTLINE, SHRINK PITCH -
Peak Reflow Temperature (Celsius) 235 235 -
Certification status Not Qualified Not Qualified -
Maximum seat height 2.65 mm 2 mm -
Maximum supply current (Isup) 1.2 mA 1.2 mA -
surface mount YES YES -
Switch configuration PUSH-PULL PUSH-PULL -
Maximum switching frequency 350 kHz 350 kHz -
technology CMOS CMOS -
Temperature level COMMERCIAL COMMERCIAL -
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) -
Terminal form GULL WING GULL WING -
Terminal pitch 1.27 mm 0.65 mm -
Terminal location DUAL DUAL -
Maximum time at peak reflow temperature 20 20 -
width 7.5 mm 5.3 mm -
Base Number Matches 1 1 -
A Deep Exploration of the Differences between C/C++ Array Names and Pointers
Author: Song Baohua e-mail: 21cnbao@21cn.com 1. Introduction Pointers are the characteristics of C/C++ language, and array names and pointers are too similar. In fact, array names can be used as point...
HOHO Embedded System
Small survey: Tell us about the oscilloscope you are using!
Oscilloscope is one of the indispensable weapons in our R&D process. [size=5][color=Blue]I am curious about what manufacturer and model of oscilloscope you use? What is the evaluation? What kind of su...
soso Test/Measurement
The simplest Makefile
Those slightly more complicated ones may seem a bit confusing, so let's just write a simple one like this to use. I carefully looked at the return values of Linux functions and some data types seem st...
会飞的IC Embedded System
Does anyone have information on PTZ decoders?
Does anyone have information on PTZ decoders?...
aluoqiang Embedded System
SMTA 2006 Anniversary Celebration and the 4th Members' Gathering was a Complete Success
[:)][:)]SMTA 2006 Anniversary Celebration and the 4th Members' Gathering was a Complete Success[Source: Shenzhen Topda Information Co., Ltd.] [Author: Yang Zhicong] [Time: 2006-5-19 8:58:16] [Clicks: ...
fighting Analog electronics
【Construction Monitoring and Security System】Work Submission Post
Construction monitoring and security systems1. IntroductionWhether during construction or in use, civil engineering projects require real-time health monitoring of building structures, such as: inclin...
sonicfirr DigiKey Technology Zone

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1522  912  1082  1164  2292  31  19  22  24  47 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号