LT3972

PRODUCTION

33V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75μA Quiescent Current

Data Sheet Product Selection Table

Part Models: 10
1ku List Price: Starting From $5.07

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Part Details

Wide Input Range:
- Operation from 3.6V to 33V
- Over-Voltage Lockout Protects Circuits Through 62V Transients
3.5A Maximum Output Current
Low Ripple (<15mV_P-P) Burst Mode^® Operation: I_Q= 75μA at 12V_IN to 3.3V_OUT
Adjustable Switching Frequency: 200kHz to 2.4MHz
Low Shutdown Current: I_Q < 1μA
Integrated Boost Diode
Synchronizable Between 250kHz to 2MHz
Power Good Flag
Saturating Switch Design: 95mΩ On-Resistance
Output Voltage: 0.79V to 30V
Thermal Protection
Soft-Start Capability
Small 10-Pin Thermally Enhanced MSOP and (3mm × 3mm) DFN Packages

Part Models: 10
1ku List Price: Starting From $5.07

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
LT3972EDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3972EDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3972EMSE#PBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3972EMSE#TRPBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3972HMSE#PBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3972HMSE#TRPBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3972IDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3972IDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3972IMSE#PBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3972IMSE#TRPBF	10-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
LT3972EMSE#PBF	PRODUCTION
LT3972EMSE#TRPBF	PRODUCTION
LT3972HMSE#PBF	PRODUCTION
LT3972HMSE#TRPBF	PRODUCTION
LT3972IMSE#PBF	PRODUCTION
LT3972IMSE#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
LT3972EMSE#PBF	PRODUCTION
LT3972EMSE#TRPBF	PRODUCTION
LT3972IMSE#PBF	PRODUCTION
LT3972IMSE#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
LT3972EMSE#PBF	PRODUCTION
LT3972EMSE#TRPBF	PRODUCTION
LT3972IMSE#PBF	PRODUCTION
LT3972IMSE#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
LT3972EMSE#PBF	PRODUCTION
LT3972EMSE#TRPBF	PRODUCTION
LT3972HMSE#PBF	PRODUCTION
LT3972HMSE#TRPBF	PRODUCTION
LT3972IMSE#PBF	PRODUCTION
LT3972IMSE#TRPBF	PRODUCTION

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

Software Resources

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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT3972

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

LT3972EMSE Demo Board | 6.3V ≤ VIN ≤ 33V (62V Transients), VOUT = 5V @ 3.5A

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Product Details

Demonstration circuit 1458 is a monolithic step-down DC/DC switching regulator featuring nonsynchronous LT3972. The demo board is designed for 5V @ 3.5A output from a 6.3V to 33V input with transients up to 62V.

Resources

DC1458A - Schematic
30.00K

DC1458A - Design File
788.00K

DC1458A - Demo Manual
462.00K

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