LTC7818

Name: LTC7818
Brand: Analog Devices
Price: 5.89 USD
Availability: InStock

RECOMMENDED FOR NEW DESIGNS

40V, Low I_Q, 3MHz, Triple Output Buck/Buck/Boost Synchronous Controller

Data Sheet (Rev. B) Product Selection Table

Part Models: 16
1ku List Price: Starting From $5.89

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Overview

Dual Buck Plus Single Boost Synchronous Controllers
Low Operating I_Q: 14μA (14V to 3.3V, Channel 1 On)
Outputs Remain in Regulation Through Cold Crank Down to 1V Input Supply Voltage
Wide Bias Input Voltage Range: 4.5V to 40V
Buck and Boost Output Voltages up to 40V
Spread Spectrum Operation
R_SENSE or DCR Current Sensing

Programmable Fixed Frequency (100kHz to 3MHz)
PassThru^™/100% Duty Cycle Capable for Synchronous Boost MOSFET
Phase-Lockable Frequency (100kHz to 3MHz)
Selectable Continuous, Pulse-Skipping, or Low Ripple Burst Mode Operation at Light Loads
Boost Channel Current Monitor Output
Low Shutdown I_Q: 1.5μA
Small 40-Lead 6mm × 6mm QFN Package
AEC-Q100 Qualified for Automotive Applications

Part Models: 16
1ku List Price: Starting From $5.89

Documentation

Data Sheet 1

LTC7818: 40V, Low I_Q, 3MHz, Triple Output Buck/Buck/Boost Synchronous Controller Data Sheet (Rev.B) 12/19/2019

User Guide 1

DC2855A - Demo Manual (Rev.0) 03/13/2020

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
LTC7818EUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818EUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818EUJ#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818EUJ#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818HUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818HUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818HUJ#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818HUJ#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818IUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818IUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818IUJ#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818IUJ#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818JUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818JUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818JUJ#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7818JUJ#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Sep 26, 2023 - 23_0121 LTC7817/LTC7818 Die Revision
		PCN23_0121_Form Material_Report
LTC7818EUJ#PBF	PRODUCTION
LTC7818EUJ#TRPBF	PRODUCTION
LTC7818EUJ#WPBF	PRODUCTION
LTC7818EUJ#WTRPBF	PRODUCTION
LTC7818HUJ#PBF	PRODUCTION
LTC7818HUJ#TRPBF	PRODUCTION
LTC7818HUJ#WPBF	PRODUCTION
LTC7818HUJ#WTRPBF	PRODUCTION
LTC7818IUJ#PBF	PRODUCTION
LTC7818IUJ#TRPBF	PRODUCTION
LTC7818IUJ#WPBF	PRODUCTION
LTC7818IUJ#WTRPBF	PRODUCTION
LTC7818JUJ#PBF	PRODUCTION
LTC7818JUJ#TRPBF	PRODUCTION
LTC7818JUJ#WPBF	PRODUCTION
LTC7818JUJ#WTRPBF	PRODUCTION
Sep 21, 2022 - 22_0220 Change of Moisture Sensitivity Level Rating from MSL 3 to MSL 1 for LTC7818 LFCSP #W Devices
		PCN22_0220_Form Material_Report
LTC7818EUJ#WPBF	PRODUCTION
LTC7818EUJ#WTRPBF	PRODUCTION
LTC7818HUJ#WPBF	PRODUCTION
LTC7818HUJ#WTRPBF	PRODUCTION
LTC7818IUJ#WPBF	PRODUCTION
LTC7818IUJ#WTRPBF	PRODUCTION
LTC7818JUJ#WPBF	PRODUCTION
LTC7818JUJ#WTRPBF	PRODUCTION

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

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC7818

LTpowerCAD 2

Design tools for the following parts are available in LTpowerCAD:

LTC7818(BOOST)
LTC7818(BUCK)

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.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

LTC7818 Demo Board | Triple Output Synchronous Step-Up/Dual Step-Down Supply

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Product Details

Demonstration circuit DC2855A is a triple output synchronous step-up/dual step-down supply featuring the LTC 7818. The demonstration circuit is designed for two buck outputs 5V/10A, 3.3V/10A supplied by a boosted 10V output. Benefiting from this feature, the buck outputs are able to maintain regulation over a wide input voltage range of 4.5V to 36V which is suitable for automotive or other battery fed applications. Also, the demonstration circuit uses a drop-in layout whereas the main buck circuit components fit in an area of ¾” by 1½”, while the main boost circuit area is ¾” by 1¾”. The package style for the LTC7818 is a 40-pin exposed pad QFN.

The main features of the board include rail tracking (Buck channels only), an internal 5V linear regulator for bias, separated RUN pins for each output, a PGOOD signal (CH1 only), an overvoltage indicator for CH3 and a Mode selector that allow the converter to run in CCM, Pulseskipping or Burst Mode operation. Spread Spectrum Mode is availiable for EMI improvement. Synchronization to an external clock is also possible. The LTC7818 datasheet gives a complete description of these parts, operation and application information. The datasheet must be read in conjunction with this quick start guide for demo circuit 2855A.