LT7101

RECOMMENDED FOR NEW DESIGNS

105V, 1A Low EMI Synchronous Step-Down Regulator with Fast Current Programming PassThru

Data Sheet (Rev. A) Product Selection Table

Part Models: 8
1ku List Price: Starting From $4.65

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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: 35ns
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 Continuous, Pulse-Skipping, or Low Ripple Burst Mode^®Operation at Light Loads
PLL Synchronization to External Clock
EXTV_CC LDO Powers Chip from VOUT = 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 $4.65

Documentation

Data Sheet 1

LT7101: 105V, 1A Low EMI Synchronous Step-Down Regulator with Fast Current Programming (Rev.A) 09/17/2024

Reliability Data 1

R526 Reliability Data 03/26/2018

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
LT7101EUHE#PBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT7101EUHE#TRPBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT7101HUHE#PBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT7101HUHE#TRPBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT7101IUHE#PBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT7101IUHE#TRPBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT7101MPUHE#PBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT7101MPUHE#TRPBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only)
		PCN25_0016_Form Material_Report Qualification Results Summary
LT7101EUHE#PBF	PRODUCTION
LT7101EUHE#TRPBF	PRODUCTION
LT7101HUHE#PBF	PRODUCTION
LT7101HUHE#TRPBF	PRODUCTION
LT7101IUHE#PBF	PRODUCTION
LT7101IUHE#TRPBF	PRODUCTION
Jan 4, 2021 - 20_0375 LT7101 Die Revision
		PCN20_0375_Form Material_Report Other
LT7101EUHE#PBF	PRODUCTION
LT7101EUHE#TRPBF	PRODUCTION
LT7101HUHE#PBF	PRODUCTION
LT7101HUHE#TRPBF	PRODUCTION
LT7101IUHE#PBF	PRODUCTION
LT7101IUHE#TRPBF	PRODUCTION
LT7101MPUHE#PBF	PRODUCTION
LT7101MPUHE#TRPBF	PRODUCTION

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

Tools & Simulations

LTspice 1

LT7101 - Step-Down (Buck) Regulators

Models for the following parts are available in LTspice:

LT7101

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

LT7101 Demo Board | 12V ≥ VIN ≥ 100V, VOUT= 12V @ 1A

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Product Details

Demonstration circuit 2895A is a 100V monolithic DC/ DC step-down regulator featuring the LT7101. The demo board is designed for a 12V/1A output from a 12V 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 94.5% at 24V_IN, 92.3% at 48V_IN and 87.1% at 100V_IN (see Figure 4).

The LT7101 is a compact, high efficiency synchronous monolithic step-down switching regulator with fast current programming. The power switches, compensation network and other necessary circuits are inside of the LT7101 to minimize external components and simplify design. The LT7101 has a wide operating range from 4.4V to 105V. A 35ns minimum on-time together with 100% maximum duty cycle allow practical use at any output voltage between 1V and V_IN. The switching frequency can be programmed either via an oscillator resistor or an external clock over a 200kHz to 2MHz range. Additional features include a fast, accurate output current programming and monitoring, and ultralow EMI/EMC emissions.