LTC1142

PRODUCTION

Dual High Efficiency Synchronous Step-Down Switching Regulators

Part Models: 8
1ku List Price: Starting From $10.19

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Overview

Dual Outputs: 3.3V and 5V or User Programmable
Ultra-High Efficiency: Over 95% Possible
Current Mode Operation for Excellent Line and Load Transient Response
High Efficiency Maintained over 3 Decades of Output Current
Low Standby Current at Light Loads: 160µA/Output
Independent Micropower Shutdown: I_Q < 40µA
Wide V_IN Range: 3.5V to 20V
Very Low Dropout Operation: 100% Duty Cycle
Synchronous FET Switching for High Efficiency
Available in Standard 28-Pin SSOP

The LTC1142/LTC1142L/LTC1142HV are dual synchronous step-down switching regulator controllers featuring automatic Burst Mode^™ operation to maintain high efficiencies at low output currents. The devices are composed of two separate regulator blocks, each driving a pair of external complementary power MOSFETs, at switching frequencies up to 250kHz, using a constant off-time current mode architecture providing constant ripple current in the inductor.

The operating current level for both regulators is user programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V to 18V (20V maximum). Constant off-time architecture provides low dropout regulation limited only by the R_DS(ON) of the external MOSFET and resistance of the inductor and current sense resistor.

The LTC1142 series is ideal for applications requiring dual output voltages with high conversion efficiencies over a wide load current range in a small amount of board space.

Applications

Notebook and Palmtop Computers
Battery-Operated Digital Devices
Portable Instruments
DC Power Distribution Systems

Part Models: 8
1ku List Price: Starting From $10.19

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
LTC1142CG#PBF	28-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1142CG#TRPBF	28-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1142HVCG#PBF	28-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1142HVCG#TRPBF	28-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1142HVCG-ADJ#PBF	28-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1142HVCG-ADJ#TRPBF	28-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1142LCG-ADJ#PBF	28-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1142LCG-ADJ#TRPBF	28-Lead SSOP	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
LTC1142CG#PBF	PRODUCTION
LTC1142CG#TRPBF	PRODUCTION
LTC1142HVCG#PBF	PRODUCTION
LTC1142HVCG#TRPBF	PRODUCTION
LTC1142HVCG-ADJ#PBF	PRODUCTION
LTC1142HVCG-ADJ#TRPBF	PRODUCTION
LTC1142LCG-ADJ#PBF	PRODUCTION
LTC1142LCG-ADJ#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
LTC3850	PRODUCTION	Dual, 2-Phase Synchronous Step-Down Switching Controller

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC1142
LTC1142HV
LTC1142HV-ADJ
LTC1142L-ADJ

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.