LT3502
LT3502A

PRODUCTION

1.1MHz/2.2MHz, 500mA Step-Down Regulators in 2mm × 2mm DFN and MS10

Data Sheet Product Selection Table

Part Models: 18
1ku List Price: Starting From $2.30

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Part Details

3V to 40V Input Voltage Range
500mA Output Current
Switching Frequency: 2.2MHz (LT3502A), 1.1MHz (LT3502)
800mV Feedback Voltage
Short-Circuit Robust
Soft-Start
Low Shutdown Current: <2μA
Internally Compensated
Internal Boost Diode
Thermally Enhanced 2mm × 2mm 8-Lead DFN and 10-Lead MS10 Package

Part Models: 18
1ku List Price: Starting From $2.30

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
LT3502AEDC#TRMPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502AEDC#TRPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502AEMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502AEMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502AIDC#TRMPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502AIDC#TRPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502AIDC#WTRMPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502AIDC#WTRPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502AIMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502AIMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502EDC#TRMPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502EDC#TRPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502EMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502EMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502IDC#TRMPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502IDC#TRPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502IMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3502IMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3502AEMS#PBF	PRODUCTION
LT3502AEMS#TRPBF	PRODUCTION
Jul 12, 2022 - 22_0157 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]
		PCN22_0157_Form Material_Report Qualification Results Summary Delta Qualification Matrix Detailed Parts List
LT3502AEMS#PBF	PRODUCTION
LT3502AEMS#TRPBF	PRODUCTION
Jun 21, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices
		PCN22_0050_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3502AEMS#PBF	PRODUCTION
LT3502AEMS#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0130_Form Material_Report
LT3502AEMS#PBF	PRODUCTION
LT3502AEMS#TRPBF	PRODUCTION
LT3502AIMS#PBF	PRODUCTION
LT3502AIMS#TRPBF	PRODUCTION
LT3502EMS#PBF	PRODUCTION
LT3502EMS#TRPBF	PRODUCTION
LT3502IMS#PBF	PRODUCTION
LT3502IMS#TRPBF	PRODUCTION
Apr 17, 2025 - 25_0043 Change of Gold to Copper Wire and BOM (Automotive)
		PCN25_0043_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LT3502AIDC#WTRMPBF
LT3502AIDC#WTRPBF
Apr 17, 2025 - 25_0119 Bond Wire Change from Gold to Copper (Automotive)
		PCN25_0119_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LT3502AIMS#PBF	PRODUCTION
LT3502IMS#PBF	PRODUCTION
LT3502IMS#TRPBF	PRODUCTION
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3502AIMS#PBF	PRODUCTION
LT3502AIMS#TRPBF	PRODUCTION
LT3502EMS#PBF	PRODUCTION
LT3502EMS#TRPBF	PRODUCTION
LT3502IMS#PBF	PRODUCTION
LT3502IMS#TRPBF	PRODUCTION
Apr 18, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices
		PCN22_0050_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3502EMS#PBF	PRODUCTION
LT3502EMS#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
Digital Temperature Sensors 1
LTC2991	RECOMMENDED FOR NEW DESIGNS	Octal I²C Voltage, Current, and Temperature Monitor
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
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

LT3502
LT3502A

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

LT3502EDC Demo Board | 1.1MHz, 500mA Step-Down Regulator

Buy Now View Details

Product Details

Demo circuit DC1221B is a monolithic step-down DC/DC switching regulator featuring the LT3502. The demo circuit is designed for 3.3V output from a 4.5V to 40V input. The wide input range of the LT3502 allows a variety of input sources including automotive batteries and 24V industrial supplies. The high switching frequency allows the use of tiny, low cost external components. The current mode control scheme creates fast transient response and good loop stability. The boost diode is internal to reduce component count. The SHDN pin can also be used to program soft start. In this mode, the SHDN pin is driven through an external RC filter to create a voltage ramp on this pin. The soft start function reduces the input current surge during start-up. Cycle by cycle current limit and frequency foldback provide the protection against shorted outputs. DA pin can further protect the silicon under fault conditions by sensing the diode current.

Resources

DC1221B - Demo Manual
3/18/2011

DC1221B - Schematic
3/18/2011

DC1221B - Design Files
3/18/2011

LT3502AEDC Demo Board | 7V to 40V Input to 5V at 500mA

Buy Now View Details

Product Details

Demonstration circuit 1089 is a monolithic step-down DC/DC switching regulator featuring the LT3502A. The demo circuit is designed for 5V output from a 7V to 40V input. The wide input range of the LT3502A allows a variety of input sources including automotive batteries and 24V industrial supplies. The high switching frequency allows the use of tiny, low cost external components. Constant switching frequency above the AM band avoids interfering with radio reception. The current mode control scheme creates fast transient response and good loop stability. The boost diode is internal to reduce component count. The SHDN pin can also be used to program soft start. In this mode, the SHDN pin is driven through an external RC filter to create a voltage ramp on this pin. The soft start function reduces the input current surge during start-up. Cycle by cycle current limit and frequency foldback provide the protection against shorted outputs. DA pin can further protect the silicon under fault conditions by sensing the diode current.

Resources

DC1089B - Schematic
10/28/2010

DC1089B - Demo Manual
10/28/2010

DC1089B - Design Files
10/28/2010

LT3502EDC Demo Board | 1.1MHz, 500mA Step-Down Regulator in DFN

Buy Now View Details

Product Details

Demonstration circuit 1221 is a monolithic step-down DC/DC switching regualtor featuring the LT3502. The demo circuit is designed for 3.3V output from a 5V to 40V input. The wide input range of the LT3502 allows a variety of input sources including automotive batteries and 24V industrial supplies.