LTC7103

RECOMMENDED FOR NEW DESIGNS

105V, 2.3A Low EMI Synchronous Step-Down Regulator with PassThru

Data Sheet (Rev. C) Product Selection Table

Part Models: 8
1ku List Price: Starting From $5.37

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Part Details

Wide V_IN Range: 4.4V to 105V (110V Abs Max)
Ultralow EMI/EMC Emissions: CISPR 25 Compliant
2µA I_Q When Regulating 48V_IN to 3.3V_OUT
Fast and Accurate Output Current Programming and Monitoring with No External R_SENSE
Brick Wall Current Limit
Low Minimum On-Time: 40ns
Wide V_OUT Range: 1V to V_IN
100% Maximum Duty Cycle Operation
Programmable Fixed Frequency: 200kHz to 2MHz

Eight, Pin-Selectable Fixed (1.2V to 15V) or Adjustable Output Voltages
Selectable Pulse-Skipping or Low Ripple Burst Mode^® Operation at Light Loads
PLL Synchronization to External Clock
EXTV_CC LDO Powers Chip from V_OUT = 3.3V to 40V
OPTI-LOOP^® or Fixed Internal Compensation
Input and Output Overvoltage Protection
Thermally Enhanced (5mm × 6mm) QFN Package

Part Models: 8
1ku List Price: Starting From $5.37

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
LTC7103EUHE#PBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7103EUHE#TRPBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7103HUHE#PBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7103HUHE#TRPBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7103IUHE#PBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7103IUHE#TRPBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7103MPUHE#PBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7103MPUHE#TRPBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Mar 18, 2020 - 20_0155 LTC7103 Die Revision
		PCN20_0155_Form Material_Report Qualification Results Summary
LTC7103EUHE#PBF	PRODUCTION
LTC7103EUHE#TRPBF	PRODUCTION
LTC7103HUHE#PBF	PRODUCTION
LTC7103HUHE#TRPBF	PRODUCTION
LTC7103IUHE#PBF	PRODUCTION
LTC7103IUHE#TRPBF	PRODUCTION
LTC7103MPUHE#PBF	PRODUCTION
LTC7103MPUHE#TRPBF	PRODUCTION
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC7103HUHE#PBF	PRODUCTION
LTC7103HUHE#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
High Voltage Hot Swap Controllers 1
LTC4380	RECOMMENDED FOR NEW DESIGNS	Low Quiescent Current Surge Stopper
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4366	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper

Tools & Simulations

LTspice 1

LTC7103 Demo Circuit - High Efficiency, Low EMI Step-Down Regulator (5-100V to 5V @ 2.3A)

Models for the following parts are available in LTspice:

LTC7103
LTC7103-1

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

LTC7103 Demo Board | VIN = 5V to 100V with VOUT = 5V at 2.3A @ 400kHz

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Product Details

Demonstration circuit 2317A is a 100V monolithic DC/ DC step-down regulator featuring the LTC7103. The demo board is designed for a 5V/2.3A output from a 5V to 100V input at 400kHz switching frequency. The wide input range makes it suitable for automotive, industrial, medical instrument, and telecom applications. This buck regulator has a peak efficiency of 93.5% at 12V_IN, 88.3% at 48V_IN and 81.5% at 100V_IN.