LTC1266

PRODUCTION

Synchronous Regulator Controller for N- or P-Channel MOSFETs

Part Models: 16
1ku List Price: Starting From $5.00

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Overview

Ultrahigh Efficiency: Over 95% Possible
Drives N-Channel MOSFET for High Current or P-Channel MOSFET for Low Dropout
Pin Selectable Burst Mode Operation
1% Output Accuracy (LTC1266A)
Pin Selectable Phase of Topside Driver for Boost or Step-Down Operation
Wide V_IN Range: 3.5V to 20V
On-Chip Low-Battery Detector
High Efficiency Maintained Over Large Current Range
Low 170µA Standby Current at Light Loads
Current Mode Operation for Excellent Line and Load Transient Response
Logic Controlled Micropower Shutdown: I_Q < 40µA
Short-Circuit Protection
Synchronous Switching with Nonoverlaping Gate Drives
Available in 16-Pin Narrow SO Package

The LTC1266 series is a family of synchronous switching regulator controllers featuring automatic Burst Mode^™ operation to maintain high efficiencies at low output currents. These devices drive external power MOSFETs at switching frequencies up to 400kHz using a constant off-time current mode architecture providing constant ripple current in the inductor. They can drive either an N-channel or a P-channel topside MOSFET.

The operating current level 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 topside MOSFET (when using the P-channel) and the resistance of the inductor and current sense resistor.

The LTC1266 series combines synchronous switching for maximum efficiency at high currents with an automatic low current operating mode, called Burst Mode operation, which reduces switching losses. Standby power is reduced to only 1mW at V_IN = 5V (at I_OUT= 0). Load currents in Burst Mode operation are typically 0mA to 500mA.

Applications

Notebook and Palmtop Computers
Portable Instruments
Cellular Telephones
DC Power Distribution Systems
GPS Systems

Part Models: 16
1ku List Price: Starting From $5.00

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
LTC1266ACS#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266ACS#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266AIS#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266AIS#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266CS#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266CS#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266CS-3.3#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266CS-3.3#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266CS-5#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266CS-5#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266IS#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266IS#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266IS-3.3#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266IS-3.3#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266IS-5#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1266IS-5#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0246_Form Material_Report Marking Comparison Delta Qualification Matrix
LTC1266ACS#PBF	PRODUCTION
LTC1266ACS#TRPBF	PRODUCTION
LTC1266AIS#PBF	PRODUCTION
LTC1266AIS#TRPBF	PRODUCTION
LTC1266CS#PBF	PRODUCTION
LTC1266CS#TRPBF	PRODUCTION
LTC1266CS-3.3#PBF	PRODUCTION
LTC1266CS-3.3#TRPBF	PRODUCTION
LTC1266CS-5#PBF	PRODUCTION
LTC1266CS-5#TRPBF	PRODUCTION
LTC1266IS#PBF	PRODUCTION
LTC1266IS#TRPBF	PRODUCTION
LTC1266IS-3.3#PBF	PRODUCTION
LTC1266IS-3.3#TRPBF	PRODUCTION
LTC1266IS-5#PBF	PRODUCTION
LTC1266IS-5#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0252 Epoxy Change from Henkel 8290 to 8290A for 16-Lead SOIC Package
		PCN22_0252_Form Material_Report Qualification Results Summary
LTC1266ACS#PBF	PRODUCTION
LTC1266ACS#TRPBF	PRODUCTION
LTC1266AIS#PBF	PRODUCTION
LTC1266AIS#TRPBF	PRODUCTION
LTC1266CS#PBF	PRODUCTION
LTC1266CS#TRPBF	PRODUCTION
LTC1266CS-3.3#PBF	PRODUCTION
LTC1266CS-3.3#TRPBF	PRODUCTION
LTC1266CS-5#PBF	PRODUCTION
LTC1266CS-5#TRPBF	PRODUCTION
LTC1266IS#PBF	PRODUCTION
LTC1266IS#TRPBF	PRODUCTION
LTC1266IS-3.3#PBF	PRODUCTION
LTC1266IS-3.3#TRPBF	PRODUCTION
LTC1266IS-5#PBF	PRODUCTION
LTC1266IS-5#TRPBF	PRODUCTION
Aug 6, 2022 - 22_0173 Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]
		PCN22_0173_Form Material_Report Delta Qualification Matrix
LTC1266ACS#PBF	PRODUCTION
LTC1266ACS#TRPBF	PRODUCTION
LTC1266AIS#PBF	PRODUCTION
LTC1266AIS#TRPBF	PRODUCTION
LTC1266CS#PBF	PRODUCTION
LTC1266CS#TRPBF	PRODUCTION
LTC1266CS-3.3#PBF	PRODUCTION
LTC1266CS-3.3#TRPBF	PRODUCTION
LTC1266CS-5#PBF	PRODUCTION
LTC1266CS-5#TRPBF	PRODUCTION
LTC1266IS#PBF	PRODUCTION
LTC1266IS#TRPBF	PRODUCTION
LTC1266IS-3.3#PBF	PRODUCTION
LTC1266IS-3.3#TRPBF	PRODUCTION
LTC1266IS-5#PBF	PRODUCTION
LTC1266IS-5#TRPBF	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:

LTC1266
LTC1266-3.3
LTC1266-5

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.