LTC1753

PRODUCTION

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

Part Models: 4
1ku List Price: Starting From $4.11

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Overview

5-Bit Digitally Programmable 1.3V to 3.5V Fixed Output Voltage, VRM 8.4 Compliant
Fast Transient Response: 0% to 100% Duty Cycle
Phase Lead Compensation for Remote Sensing
Overtemperature Protection
Flags for Power Good 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
Available in 2O-Lead SSOP and SW Packages

The LTC1753 is a high power, high efficiency switching regulator controller optimized for 5V input to a digitally programmable 1.3V-3.5V output. The internal 5-bit DAC programs the output voltage from 1.3V to 2.05V in 50mV increments and from 2.1V to 3.5V in 100mV increments. The precision internal reference and an internal feedback system provide an output accuracy of ±1.5% at room temperature and typically ±2% over temperature, load current and line voltage shifts. The LTC1753 uses a synchronous 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. Additionally, 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 LTC1753 free-runs at 300kHz and can be synchronized to a faster external clock if desired. It provides a phase lead compensation scheme and under harsh loading conditions, the PWM duty cycle can be momentarily forced to 0% or 100% to reduce the output voltage recovery time.

Applications

Power Supply for Pentium^® III, AMD-K6^®-2, SPARC, ALPHA and PA-RISC Microprocessors
High Power 5V to 1.3V-3.5V Regulators

Part Models: 4
1ku List Price: Starting From $4.11

Documentation

Data Sheet 1

LTC1753: 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium^® II Processor Data Sheet 08/28/2007

Reliability Data 1

R344 Reliability Data 03/26/2018

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC1753CG#PBF	20-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1753CG#TRPBF	20-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1753CSW#PBF	20-Lead SOIC (Wide 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1753CSW#TRPBF	20-Lead SOIC (Wide 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG
		PCN22_0171_Form Material_Report Delta Qualification Matrix
LTC1753CG#PBF	PRODUCTION
LTC1753CG#TRPBF	PRODUCTION
Aug 10, 2022 - 22_0176 Laser Top Mark Conversion for SOIC_W Packages Assembled in ADPG [PNG] and UTL
		PCN22_0176_Form Material_Report Delta Qualification Matrix
LTC1753CSW#PBF	PRODUCTION
LTC1753CSW#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Power System Management (PSM) & Sequencers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Switching Regulators & Controllers 1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC1753

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.