LT8697
Info : RECOMMENDED FOR NEW DESIGNS
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LT8697

USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 6
1ku List Price Starting From $4.25
Features
  • Wide Input Range: 5V to 42V
  • Low Dropout Under All Conditions: 450mV at 2.1A
  • Accurate 5V Output: ±1.3% Over Full Temperature Range
  • Programmable Cable Drop Compensation
  • Programmable Output Current Limit
  • Output Current Monitor
  • Dual Input Feedback Permits Regulation on Output of USB Switch
  • Forced Continuous Mode for Fast Load Step Response
  • High Efficiency Synchronous Operation at 2MHz:
    • 93% Efficiency at 2.1A, 5VOUT from 12VIN
    • 95% Efficiency at 0.9A, 5VOUT from 12VIN
  • Fast Minimum Switch-On Time: 45ns
  • Adjustable Output from 5.0V to 5.25V
  • Adjustable and Synchronizable: 300kHz to 2.2MHz
  • Small Thermally Enhanced 3mm × 5mm 24-Lead QFN Package
Additional Details
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The LT8697 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator designed to power 5V USB applications. A precise output voltage and programmable cable drop compensation maintain accurate 5V regulation at the USB socket connected to the end of a long cable. Forced continuous operation allows the LT8697 to sink current, further enhancing accurate 5V regulation during load transients.

Accurate and programmable output current limit, a power good indicator pin and an output current monitor pin improve system reliability and safety, allow the user to implement latch-off or auto-retry functionality and can eliminate the need for a USB switch IC. Dual feedback allows regulation on the output of a USB switch and limits cable drop compensation to a maximum of 5.8V output, protecting USB devices during fault conditions. Thermal shutdown provides additional protection by limiting power dissipation in the IC during an overtemperature fault.

The LT8697 is available in a small 24-lead 3mm × 5mm package with an exposed pad for low thermal resistance.

Applications

  • Automotive and Industrial USB
  • Precision 5V Supply
Part Models 6
1ku List Price Starting From $4.25

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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

PCN

Apr 11, 2019

- 19_0067

Notification of Wafer Fab Location Change for 0.35 BCD Process

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LT8697EUDD#TRPBF

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Part Models

Product Lifecycle

PCN

Apr 11, 2019

- 19_0067

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Notification of Wafer Fab Location Change for 0.35 BCD Process

LT8697EUDD#PBF

PRODUCTION

LT8697EUDD#TRPBF

PRODUCTION

LT8697HUDD#PBF

PRODUCTION

LT8697HUDD#TRPBF

PRODUCTION

LT8697IUDD#PBF

PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC1973A

LT8697 Demo Board | 6V ≤ VIN ≤ 42V, 5V @ 2.5A USB Supply Output, Cable Drop Compensation

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DC1973A

LT8697 Demo Board | 6V ≤ VIN ≤ 42V, 5V @ 2.5A USB Supply Output, Cable Drop Compensation

LT8697 Demo Board | 6V ≤ VIN ≤ 42V, 5V @ 2.5A USB Supply Output, Cable Drop Compensation

Product Detail

Demonstration circuit 1973A is a USB 5V 2.5A output, 6V to 42V input synchronous buck with cable drop compensation featuring the LT8697. The LT8697 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator designed to power 5V USB applications. A precise output voltage and programmable cable drop compensation maintain accurate 5V regulation at the USB socket at the end of a long cable. The circuit runs at 2MHz to minimize external components size and to avoid AM band.

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.

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