LTC1159

PRODUCTION

High Efficiency Synchronous Step-Down Switching Regulators

Part Models: 18
1ku List Price: Starting From $7.18

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Overview

Operation from 4V to 40V Input Voltage
20µA Supply Current in Shutdown
High Efficiency Maintained Over Wide Current Range
Current Mode Operation for Excellent Line and Load Transient Response
Very Low Dropout Operation: 100% Duty Cycle
Short-Circuit Protection
Synchronous FET Switching for High Efficiency
Adaptive Non-Overlap Gate Drives
Ultrahigh Efficiency: Up to 95%
Available in SSOP and SO Packages

The LTC1159 series is a family of synchronous step-down switching regulator controllers featuring automatic Burst Mode^™ operation to maintain high efficiencies at low output currents. These devices drive external complementary power MOSFETs at switching frequencies up to 250kHz using a constant off-time current-mode architecture.

A separate pin and on-board switch allow the MOSFET driver power to be derived from the regulated output voltage providing significant efficiency improvement when operating at high input voltages. The constant off-time current-mode architecture maintains constant ripple current in the inductor and provides excellent line and load transient response. The output current level is user programmable via an external current sense resistor.

The LTC1159 automatically switches to power saving Burst Mode operation when load current drops below approximately 15% of maximum current. Standby current is only 300µA while still regulating the output and shutdown current is a low 20µA.

Applications

Step-Down and Inverting Regulators
Notebook and Palmtop Computers
Portable Instruments
Battery-Operated Digital Devices
Industrial Power Distribution
Avionics Systems
Telecom Power Supplies

Part Models: 18
1ku List Price: Starting From $7.18

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
LTC1159CG#PBF	20-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CG#TRPBF	20-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CG-3.3#PBF	20-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CG-3.3#TRPBF	20-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CG-5#PBF	20-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CG-5#TRPBF	20-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CS#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CS#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CS-3.3#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CS-3.3#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CS-5#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159CS-5#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159IS#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159IS#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159IS-3.3#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159IS-3.3#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159IS-5#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1159IS-5#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

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
LTC1159CG#PBF	PRODUCTION
LTC1159CG#TRPBF	PRODUCTION
LTC1159CG-3.3#PBF	PRODUCTION
LTC1159CG-3.3#TRPBF	PRODUCTION
LTC1159CG-5#PBF	PRODUCTION
LTC1159CG-5#TRPBF	PRODUCTION
LTC1159CS#PBF	PRODUCTION
LTC1159CS#TRPBF	PRODUCTION
LTC1159CS-3.3#PBF	PRODUCTION
LTC1159CS-3.3#TRPBF	PRODUCTION
LTC1159CS-5#PBF	PRODUCTION
LTC1159CS-5#TRPBF	PRODUCTION
LTC1159IS#PBF	PRODUCTION
LTC1159IS#TRPBF	PRODUCTION
LTC1159IS-3.3#PBF	PRODUCTION
LTC1159IS-3.3#TRPBF	PRODUCTION
LTC1159IS-5#PBF	PRODUCTION
LTC1159IS-5#TRPBF	PRODUCTION
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
LTC1159CS#PBF	PRODUCTION
LTC1159CS#TRPBF	PRODUCTION
LTC1159CS-3.3#PBF	PRODUCTION
LTC1159CS-3.3#TRPBF	PRODUCTION
LTC1159CS-5#PBF	PRODUCTION
LTC1159CS-5#TRPBF	PRODUCTION
LTC1159IS#PBF	PRODUCTION
LTC1159IS#TRPBF	PRODUCTION
LTC1159IS-3.3#PBF	PRODUCTION
LTC1159IS-3.3#TRPBF	PRODUCTION
LTC1159IS-5#PBF	PRODUCTION
LTC1159IS-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:

LTC1159
LTC1159-3.3
LTC1159-5

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.