LT3980

PRODUCTION

58V, 2A, 2.4MHz Step-Down Switching Regulator with 85μA Quiescent Current

Data Sheet

Part Models: 10
1ku List Price: Starting From $4.25

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Part Details

Wide Input Range: Operation from 3.6V to 58V
Overvoltage Lockout Protects Circuits Through 80V Transients
2A Maximum Output Current
Low Ripple (<15mV_P-P) Burst Mode^® Operation: I_Q = 85μA at 12V_IN to 3.3V_OUT
Adjustable Switching Frequency: 100kHz to 2.4MHz
Low Shutdown Current: I_Q < 1μA
Catch Diode Current Sense Protects Circuit Through Short-Circuit and Input Overvoltage
Synchronizable Between 250kHz to 2MHz
Power Good Flag
Saturating Switch Design: 200mΩ On-Resistance
Thermal Protection
Soft-Start Capability
Small 16-Pin Thermally Enhanced MSOP and 3mm × 4mm DFN Packages

Part Models: 10
1ku List Price: Starting From $4.25

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
LT3980EDE#PBF	14-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3980EDE#TRPBF	14-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3980EMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3980EMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3980HMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3980HMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3980IDE#PBF	14-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3980IDE#TRPBF	14-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3980IMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3980IMSE#TRPBF	16-Lead MSOP w/ EP	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
LT3980EMSE#PBF	PRODUCTION
LT3980EMSE#TRPBF	PRODUCTION
LT3980HMSE#PBF	PRODUCTION
LT3980HMSE#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
LT3980EMSE#PBF	PRODUCTION
LT3980EMSE#TRPBF	PRODUCTION
LT3980HMSE#PBF	PRODUCTION
LT3980HMSE#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LT3980EMSE#PBF	PRODUCTION
LT3980EMSE#TRPBF	PRODUCTION
LT3980HMSE#PBF	PRODUCTION
LT3980HMSE#TRPBF	PRODUCTION
LT3980IMSE#PBF	PRODUCTION
LT3980IMSE#TRPBF	PRODUCTION
Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LT3980IDE#PBF	PRODUCTION
LT3980IDE#TRPBF	PRODUCTION

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

Hardware Ecosystem

Parts	Product Life Cycle	Description
Power System Managers & Sequencers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Protection Switches & Controllers 2
LTC4364	RECOMMENDED FOR NEW DESIGNS	Surge Stopper with Ideal Diode
LTC4359	RECOMMENDED FOR NEW DESIGNS	Ideal Diode Controller with Reverse Input Protection
Switching Regulators & Controllers 1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT3980

LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:

LT3980

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

LT3980EMSE Demo Board | 6.8V ≤ VIN ≤ 58V (80V Transients), VOUT = 5V @ 2A

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Product Details

Demonstration circuit 1476A is a 2A, 58V step-down switching regulator with 75µA quiescent current featuring the LT3980EMSE. The demo board is designed for a 5V/2A output from a 6.8V to 58V input with transients up to 80V.

Resources

DC1476A - Schematic
10/21/2009

DC1476A - Design Files
10/21/2009

DC1476A - Demo Manual
10/21/2009

Reference Designs

View Detailed Reference Design

Features and Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications