LTC7817

Name: LTC7817
Brand: Analog Devices
Price: 5.59 USD
Availability: InStock

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. A) Product Selection Table

Part Models: 8
1ku List Price: Starting From $5.59

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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
Pass-Thru^™ Operation: 100% Duty Cycle for Boost Synchronous MOSFET

R_SENSE or DCR Current Sensing
Programmable Fixed Frequency (100kHz to 3MHz)
Phase-Lockable Frequency (100kHz to 3MHz)
Selectable Continuous, Pulse-Skipping, or Low Ripple Burst Mode Operation at Light Loads
Very Low Buck Dropout Operation: 99% Duty Cycle
Low Shutdown I_Q: 1.5μA
Small 38-Lead 5mm × 7mm QFN Package
AEC-Q100 Qualified for Automotive Applications

Part Models: 8
1ku List Price: Starting From $5.59

Documentation

Data Sheet 1

LTC7817: 40V, Low I_Q, 3MHz, Triple Output Buck/Buck/Boost Synchronous Controller Data Sheet (Rev.A) 09/24/2020

User Guide 1

DC3033A - Demo Manual (Rev.0) 01/26/2021

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
LTC7817EUHF#PBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7817EUHF#TRPBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7817HUHF#WPBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7817HUHF#WTRPBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7817IUHF#WPBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7817IUHF#WTRPBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7817JUHF#WPBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC7817JUHF#WTRPBF	38-Lead QFN (5mm x 7mm 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
LTC7817EUHF#PBF	PRODUCTION
LTC7817EUHF#TRPBF	PRODUCTION
LTC7817HUHF#WPBF	PRODUCTION
LTC7817HUHF#WTRPBF	PRODUCTION
LTC7817IUHF#WPBF	PRODUCTION
LTC7817IUHF#WTRPBF	PRODUCTION
LTC7817JUHF#WPBF	PRODUCTION
LTC7817JUHF#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:

LTC7817

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.

Evaluation Kits

LTC7817 Demo Board | Triple Output Synchronous Step-Up/Dual Step-Down Supply

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Product Details

Demonstration circuit 3033A is a triple output synchronous step-up/dual step-down supply featuring the LTC7817. 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-inch by 1½-inch, while the main boost circuit area is ¾-inch by 1¾-inch. The package style for the LTC7817 is a 38-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), and a mode selector that allow the converter to run in forced continuous mode (FCM), pulse-skipping (PSM) or Burst Mode^® operation (BURST). Synchronization to an external clock is also possible. The LTC7817 data sheet gives a complete description of these parts, operation and application information. The data sheet must be read in conjunction with this quick start guide for demo circuit 3033A.