LT7101

RECOMMENDED FOR NEW DESIGNS

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

Analog Devices LT7101 Product Info

10 February 2026 6

Features

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 details & applications

The LT7101 is a high efficiency, monolithic synchronous step-down DC/DC converter utilizing a constant frequency, average current mode control architecture. It operates from an input voltage range of 4.4V to 105V and provides an adjustable regulated output voltage from 1V to V_IN while delivering up to 1A of output current.

The LT7101 features high frequency operation and a low minimum on-time that reduce inductor size and enable constant-frequency operation even at very high stepdown ratios. In addition, the LT7101 achieves the lowest possible dropout voltage with 100% maximum duty cycle operation. During light load operation, converter efficiency and output ripple can be optimized by selecting Burst Mode, pulse-skipping or forced continuous operation.

The LT7101 includes accurate, high speed average current programming and monitoring without the need for an external sense resistor. Additional features include a bypass LDO to maximize efficiency, fixed or adjustable output voltage and loop compensation, and a wide array of protection features to enhance reliability.

Applications

Battery Chargers and CC/CV Supplies
Automotive and Military Systems
Industrial, Avionics and Heavy Equipment
Medical Instruments and Telecommunication Systems

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