LTC3642

PRODUCTION

High Efficiency, High Voltage 50mA Synchronous Step-Down Converter

Data Sheet Product Selection Table

Part Models: 24
1ku List Price: Starting From $3.19

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Part Details

Wide Input Voltage Range: 4.5V to 45V
Tolerant of 60V Input Transients
Internal High Side and Low Side Power Switches
No Compensation Required
50mA Output Current
Low Dropout Operation: 100% Duty Cycle
Low Quiescent Current: 12μA
0.8V Feedback Voltage Reference
Adjustable Peak Current Limit
Internal and External Soft-Start
Precise RUN Pin Threshold with Adjustable Hysteresis
3.3V, 5V and Adjustable Output Versions
Only Three External Components Required for Fixed Output Versions
Low Profile (0.75mm) 3mm × 3mm DFN and Thermally-Enhanced MS8E Packages

Part Models: 24
1ku List Price: Starting From $3.19

Documentation

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
LTC3642EDD#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EDD#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EDD-3.3#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EDD-3.3#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EDD-5#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EDD-5#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EMS8E#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EMS8E#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EMS8E-3.3#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EMS8E-3.3#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EMS8E-5#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642EMS8E-5#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IDD#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IDD#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IDD-3.3#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IDD-3.3#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IDD-5#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IDD-5#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IMS8E#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IMS8E#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IMS8E-3.3#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IMS8E-3.3#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IMS8E-5#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3642IMS8E-5#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 28, 2021 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)
		PCN20_0245_Form Material_Report Delta Qualification Matrix Other Qualification Results Summary
LTC3642EDD#PBF	PRODUCTION
LTC3642EDD#TRPBF	PRODUCTION
LTC3642EDD-3.3#PBF	PRODUCTION
LTC3642EDD-3.3#TRPBF	PRODUCTION
LTC3642EMS8E#PBF	PRODUCTION
LTC3642EMS8E#TRPBF	PRODUCTION
LTC3642EMS8E-3.3#PBF	PRODUCTION
LTC3642EMS8E-3.3#TRPBF	PRODUCTION
LTC3642IDD#PBF	PRODUCTION
LTC3642IDD#TRPBF	PRODUCTION
LTC3642IDD-3.3#PBF	PRODUCTION
LTC3642IDD-3.3#TRPBF	PRODUCTION
LTC3642IMS8E#PBF	PRODUCTION
LTC3642IMS8E#TRPBF	PRODUCTION
LTC3642IMS8E-3.3#PBF	PRODUCTION
LTC3642IMS8E-3.3#TRPBF	PRODUCTION
Nov 8, 2021 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)
		PCN20_0245_Form Material_Report Delta Qualification Matrix Other Qualification Results Summary
LTC3642EDD-5#PBF	PRODUCTION
LTC3642EDD-5#TRPBF	PRODUCTION
LTC3642EMS8E-5#PBF	PRODUCTION
LTC3642EMS8E-5#TRPBF	PRODUCTION
LTC3642IDD-5#PBF	PRODUCTION
LTC3642IDD-5#TRPBF	PRODUCTION
LTC3642IMS8E-5#PBF	PRODUCTION
LTC3642IMS8E-5#TRPBF	PRODUCTION
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0128_Form Material_Report
LTC3642EMS8E#PBF	PRODUCTION
LTC3642EMS8E#TRPBF	PRODUCTION
LTC3642EMS8E-3.3#PBF	PRODUCTION
LTC3642EMS8E-3.3#TRPBF	PRODUCTION
LTC3642EMS8E-5#PBF	PRODUCTION
LTC3642EMS8E-5#TRPBF	PRODUCTION
LTC3642IMS8E#PBF	PRODUCTION
LTC3642IMS8E#TRPBF	PRODUCTION
LTC3642IMS8E-3.3#PBF	PRODUCTION
LTC3642IMS8E-3.3#TRPBF	PRODUCTION
LTC3642IMS8E-5#PBF	PRODUCTION
LTC3642IMS8E-5#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
Dual-Supply Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
PowerPath, Ideal Diodes, and Load Switches 1
LTC4359	RECOMMENDED FOR NEW DESIGNS	Ideal Diode Controller with Reverse Input Protection
Pushbutton Controllers 1
LTC2955	RECOMMENDED FOR NEW DESIGNS	Pushbutton On/Off Controller with Automatic Turn-On
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4365	RECOMMENDED FOR NEW DESIGNS	Overvoltage, Undervoltage and Reverse Supply Protection Controller

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC3642
LTC3642-3.3
LTC3642-5

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

LTC3642EDD Demo Board | 60V Transients, 4.5V ≤ VIN ≤ 45V, VOUT = 1.8V/3.3V/5V/Adjustable @ 50mA

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Product Details

Demonstration circuit DC1429A is a high efficiency step-down DC/DC converter featuring LTC3642 with internal high side and synchronous power switches that draws only 10μA quiescent current. It has a wide 4.5V to 45V input range and internal over voltage monitor capable of protecting the part through 60V surges. The jumper-selectable output is up to 5V. LTC3642 can supply up to 50mA load current with a programmable peak current limit that provides a simple method for optimizing efficiency in lower current applications. With no compensation required, LTC3642 is easily configured with minimal components. Gerber files for this circuit are available.

Resources

DC1429A - Schematic
9/24/2009

DC1429A - Design File
9/24/2009

DC1429A - Demo Manual
9/24/2009

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