LT7101 Series

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

Catalog

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

Part	Voltage - Output (Min/Fixed)	Supplier Device Package	Mounting Type	Package / Case	Number of Outputs	Voltage - Input (Min) [Min]	Output Type	Voltage - Input (Max) [Max]	Topology	Output Configuration	Current - Output	Function	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Output (Max) [Max]	Frequency - Switching [Max]	Frequency - Switching [Min]
Analog Devices LT7101EUHE#TRPBF	1 V	36-QFN (5x6)	Surface Mount	36-WFQFN 26 Leads Exposed Pad	1	4.4 V	Adjustable	105 V	Buck	Positive	1 A	Step-Down	-40 °C	125 °C	105 V	2 MHz	200 kHz
Analog Devices LT7101IUHE#TRPBF	1 V	36-QFN (5x6)	Surface Mount	36-WFQFN 26 Leads Exposed Pad	1	4.4 V	Adjustable	105 V	Buck	Positive	1 A	Step-Down	-40 °C	125 °C	105 V	2 MHz	200 kHz
Analog Devices LT7101HUHE#TRPBF	1 V	36-QFN (5x6)	Surface Mount	36-WFQFN 26 Leads Exposed Pad	1	4.4 V	Adjustable	105 V	Buck	Positive	1 A	Step-Down	-40 °C	150 °C	105 V	2 MHz	200 kHz

Catalog

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

Key Features

• Wide VINRange: 4.4V to 105V (110V Abs Max)

• Ultralow EMI/EMC Emissions: CISPR 25 Compliant

• 2µA IQWhen Regulating 48VINto 3.3VOUT

• Fast and Accurate Output Current Programming and

• Monitoring with No External RSENSE

• Brick Wall Current Limit

• Low Minimum On-Time: 35ns

• Wide VOUTRange: 1V to VIN

• 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

• EXTVCCLDO 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

Description

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 VINwhile 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.ApplicationsBattery Chargers and CC/CV SuppliesAutomotive and Military SystemsIndustrial, Avionics and Heavy EquipmentMedical Instruments and Telecommunication Systems