LTC7103
Info : RECOMMENDED FOR NEW DESIGNS
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LTC7103

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

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $5.37
Features
  • Wide VIN Range: 4.4V to 105V (110V Abs Max)
  • Ultralow EMI/EMC Emissions: CISPR 25 Compliant
  • 2µA IQ When Regulating 48VIN to 3.3VOUT
  • Fast and Accurate Output Current Programming and Monitoring with No External RSENSE
  • Brick Wall Current Limit
  • Low Minimum On-Time: 40ns
  • Wide VOUT Range: 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 Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Loads
  • PLL Synchronization to External Clock
  • EXTVCC 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
Additional Details
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The LTC7103 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 VIN while delivering up to 2.3A of output current.

The LTC7103 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 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 or pulse-skipping operation.

The LTC7103 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
Part Models 8
1ku List Price Starting From $5.37

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Mar 18, 2020

- 20_0155

LTC7103 Die Revision

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PRODUCTION

LTC7103HUHE#PBF

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Filter by Model

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Reset Filters

Part Models

Product Lifecycle

PCN

Mar 18, 2020

- 20_0155

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LTC7103 Die Revision

LTC7103EUHE#PBF

PRODUCTION

LTC7103EUHE#TRPBF

PRODUCTION

LTC7103HUHE#PBF

PRODUCTION

LTC7103HUHE#TRPBF

PRODUCTION

LTC7103IUHE#PBF

PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2317A

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

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DC2317A

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

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

Product Detail

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 12VIN, 88.3% at 48VIN and 81.5% at 100VIN.

Tools & Simulations

Tools & Simulations 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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Reference Designs

Reference Designs 1

Figure 1. CN0509 Wide Range Isolated Device Charger Simplified Schematic

Wide Input Voltage Range, Dual USB Port Charger

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