LT1939

PRODUCTION

Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $3.66

Viewing:

Part Details

Wide Input Range: 3V to 25V
Short-Circuit Protected Over Full Input Range
2A Output Current Capability
Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2.2MHz
Soft-Start/Tracking Capability
Output Adjustable Down to 0.8V
Adjustable Linear Regulator/Driver with 13mA Output Capability
Power Good Comparator with Complementary Outputs
Low Shutdown Current: 12μA
Thermally Enhanced 3mm × 3mm DFN Package

Part Models: 4
1ku List Price: Starting From $3.66

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
LT1939EDD#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1939EDD#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1939IDD#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1939IDD#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital Power System Managers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Dual-Supply Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Silicon Oscillators 1
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 1

LT1939 Demo Circuit - Monolithic 2A Step-Down Regulator Plus LDO (12V to 5V @ 1A & 3.3V @ 1A)

Models for the following parts are available in LTspice:

LT1939

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.