LTC7103-1 Series

105V, 2.3A Low EMI Synchronous Step-Down Regulator with Fast Current Programming

Catalog

105V, 2.3A Low EMI Synchronous Step-Down Regulator with Fast Current Programming

Part	Output Type	Voltage - Output (Max) [Max]	Topology	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input (Max) [Max]	Function	Supplier Device Package	Number of Outputs	Voltage - Output (Min/Fixed)	Current - Output	Frequency - Switching [Max]	Frequency - Switching [Min]	Voltage - Input (Min) [Min]	Output Configuration	Mounting Type	Frequency - Switching
Analog Devices LTC7103RUHE-1#PBF	Adjustable	105 V	Buck	36-WFQFN 26 Leads Exposed Pad	-40 °C	125 ¯C	105 V	Step-Down	36-QFN (5x6)	1	1 V	2.3 A	2 MHz	200 kHz	4.4 V	Positive	Surface Mount
Analog Devices LTC7103HUHE#PBF	Adjustable	105 V	Buck	36-WFQFN 26 Leads Exposed Pad	-40 °C	150 °C	105 V	Step-Down	36-QFN (5x6)	1	1 V	2.3 A			4.4 V	Positive	Surface Mount	1 MHz
Analog Devices LTC7103IUHE#TRPBF	Adjustable	105 V	Buck	36-WFQFN 26 Leads Exposed Pad	-40 °C	125 ¯C	105 V	Step-Down	36-QFN (5x6)	1	1 V	2.3 A			4.4 V	Positive	Surface Mount	1 MHz

Catalog

105V, 2.3A Low EMI Synchronous Step-Down Regulator with Fast Current Programming

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: 40ns

• Wide VOUTRange: 1V to VIN

• PassThru™/100% Duty Cycle Capable

• 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

• AEC-Q100 Qualification in Process

Description

The LTC7103-1 is a high efficiency, monolithic synchro-nous 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 2.3A of output current.The LTC7103-1 features high frequency operation and a low minimum on-time that reduce inductor size and enable constant-frequency operation even at very high step-down ratios. In addition, the LTC7103-1 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 LTC7103-1 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. Compared to the LTC7103, the LTC7103-1 is pin compatible, except that it also offers continuous inductor current mode.ApplicationsBattery Chargers and CC/CV SuppliesAutomotive and Military SystemsIndustrial, Avionics and Heavy EquipmentMedical Instruments and Telecommunication